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Project mẫu AVR (phần 2)

le_hieu_29 - 19/03/2012

13.Pulse period by timer1

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Chip type           : ATmega32
Program type        : Application
Clock frequency     : 6.000000 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/

#include "mega32.h"

// Standard Input/Output functions
#include  "stdio.h"

unsigned char ov_counter;
unsigned int starting_edge, ending_edge;
unsigned long clocks;
unsigned int period_out;
bit done = 0;

// Timer 1 overflow interrupt service routine
interrupt [TIM1_OVF] void timer1_ovf_isr(void)
{
    // Place your code here
    ++ov_counter;
}

// Timer 1 input capture interrupt service routine
interrupt [TIM1_CAPT] void timer1_capt_isr(void)
{
// Place your code here
    ending_edge = (unsigned int)ICR1H*256 + (unsigned int)ICR1L;
    clocks = (unsigned long)ending_edge \
            + ((unsigned long)ov_counter*65536) \
            - (unsigned long) starting_edge;
    period_out = clocks/750;
    done = 1;
    ov_counter = 0;
    starting_edge = ending_edge;        
}

// Declare your global variables here

void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: 750.000 kHz
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Rising Edge
// Timer 1 Overflow Interrupt: On
// Input Capture Interrupt: On
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x42;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x24;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x26;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// Global enable interrupts
#asm("sei")

while (1)
{
    if(done){
        printf("Pulse period in ms = %u\n\r", period_out);
        done = 0;            
    }
};
}

14.ADC_Complete_Int.

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Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/

#include "mega32.h"
#include "delay.h"

// Standard Input/Output functions
#include"stdio.h"

#define ADC_VREF_TYPE 0x00


// Declare your global variables here
bit adc_done = 0;         // Global ADC done flag bit

// ADC interrupt service routine
interrupt [ADC_INT] void adc_isr(void)
{
  unsigned int adc_result;
  // Read the AD conversion result
  adc_result = ADCW;
  // Always clear ADC IF bit
  ADCSRA |= 0x10;
  // print this value
  printf("Done interrupt! ADC value = %d\n\r",adc_result);
  // Set done bit
  adc_done = 1;  
}


// Trigger ADC conversion
void adc_trigger_conv(unsigned char adc_input)
{
  // Clear done bit
  adc_done = 0;
  // Select adc channel
  ADMUX=adc_input|ADC_VREF_TYPE;
  // Start the AD conversion
  ADCSRA|=0x40;
  // Don't wait for complete, exist now.
}

void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x2F;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// ADC initialization
// ADC Clock frequency: 115.200 kHz
// ADC Voltage Reference: AREF pin
ADMUX=ADC_VREF_TYPE;
ADCSRA=0x8E;

// Global enable interrupts
#asm("sei")

// trigger for the first time
adc_trigger_conv(0);

while (1)
{
  // Place your code here
  if (adc_done) adc_trigger_conv(0);
  delay_ms(1000);
};
}

15.ADC_Differential.

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Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/

#include  "mega32.h"
#include "delay.h"

// Standard Input/Output functions
#include "stdio.h"

#define ADC_VREF_TYPE 0x00

// User's defines
// Here, we choose ADC0 as Neg Input
// ADC1 as Pos Input
// Gain set to 10x
// Look up on table in datasheet --> MUX4:0 = 0b01001
#define ADC_DIFF_TYPE (0b01001)

// Convert value from ADC data register with its sign (+/-)
int convert_adc_value(unsigned int adc_10bit_input_value)
{
    int result;
    result = (int)(adc_10bit_input_value & 0x1FF);
    result = (adc_10bit_input_value & (1 << 9)) ? (-(512 - result)) : result;
    return result;
}


// Read the AD conversion result
int read_diff_adc(void)
{
    ADMUX = ADC_VREF_TYPE | ADC_DIFF_TYPE;
    // Start the AD conversion
    ADCSRA|=0x40;
    // Wait for the AD conversion to complete
    while ((ADCSRA & 0x10)==0);
    ADCSRA|=0x10;
    return ADCW;
}

// Declare your global variables here

void main(void)
{
// Declare your local variables here
unsigned int u16_adc;
int s16_adc;

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x2F;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// ADC initialization
// ADC Clock frequency: 115.200 kHz
// ADC Voltage Reference: AREF pin
ADMUX=ADC_VREF_TYPE;
ADCSRA=0x86;

while (1)
{   
    // Get adc value from ADC register
    u16_adc = read_diff_adc();      
    // Convert to signed int value
    s16_adc = convert_adc_value(u16_adc);
    printf("ADC value on Diff channel = %d \n\r", s16_adc);
    delay_ms(1000);
};
}

 

16.ADC_Trigger_By_Int.

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  • Chương trình mẫu:

Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/


#include "mega32.h"
// Standard Input/Output functions
#include "stdio.h"

// User's definitions -------------------------------
// ADSRA register definitions
#define ADEN  (1 << 7)  // ADC Enable
#define ADSC  (1 << 6)  // ADC Start Conversion
#define ADATE (1 << 5)  // ADC Auto Trigger Enable
#define ADIF  (1 << 4)  // ADC Interrupt Flag
#define ADIE  (1 << 3)  // ADC Interrupt Enable
#define ADPS2 (1 << 2)  // ADC Prescale bit 2
#define ADPS1 (1 << 1)  // ADC Prescale bit 1
#define ADPS0 (1)     // ADC Prescale bit 0

// SFIOR register definitions
#define ADTS2 (1 << 7)  // ADC Trigger Source bit 2
#define ADTS1 (1 << 6)  // ADC Trigger Source bit 1
#define ADTS0 (1 << 5)  // ADC Trigger Source bit 0
#define ADTS_MASK (ADTS2 | ADTS1 | ADTS0) // ADC Trigger Source Bits Mask

// GIFR register definitions
#define INT0  (1 << 6)  // INT0

#define ADC_VREF_TYPE 0x00

// Global varables -------------------------------

// ADC interrupt service routine
interrupt [ADC_INT] void adc_isr(void)
{
  unsigned int adc_data;
  // Read the AD conversion result
  adc_data=ADCW;
  // Place your code here
  printf("Conversion done! Value = %d\n\r",adc_data);
  // Clear INT0 flag for next auto trigger by INT0
  GIFR = INT0;
}

// Configure ADC channel that conversion will be trigger to
// convert ADC for.
void config_adc_channel(unsigned char adc_input)
{
  ADMUX=adc_input|ADC_VREF_TYPE;
}


void main(void)
{
// Declare your local variables here
unsigned char temp;

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: On
// INT0 Mode: Falling Edge
// INT1: Off
// INT2: Off
GICR=0x00;  // Disable INT0 Request to Global Interrupt
MCUCR=0x02; // Falling Edge on INT0
MCUCSR=0x00;
GIFR=0x40;  // Clear INT0 Interrupt Flag

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x2F;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// ADC initialization
// ADC Clock frequency: 115.200 kHz
// ADC Voltage Reference: AREF pin
ADMUX=ADC_VREF_TYPE;

// Enable Auto trigger conversion --------------------------------
ADCSRA = 0x8E | ADATE;

// Configure trigger source --------------------------------------
// Read out and mask ADTS[2..0] bit in the current status of SFIOR
temp = SFIOR & (~(ADTS_MASK));
// Choose External Interrupt 0 (see datasheet)
temp |= ADTS1;
// Write back to SFIOR
SFIOR = temp;

// Must configure ADC channel before using
config_adc_channel(0);

// Global enable interrupts
#asm("sei")

while (1)
{
  // Place your code here
};
}

 

17.ADC_using_LM35.

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Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/

#include  "mega32.h"
#include  "delay.h"
#include "stdio.h"

// Standard Input/Output functions
#include "stdlib.h"

#define ADC_VREF_TYPE 0x00

// Read the AD conversion result
unsigned int read_adc(unsigned char adc_input)
{
ADMUX=adc_input|ADC_VREF_TYPE;
// Start the AD conversion
ADCSRA|=0x40;
// Wait for the AD conversion to complete
while ((ADCSRA & 0x10)==0);
ADCSRA|=0x10;
return ADCW;
}

// Declare your global variables here

void main(void)
{
// Declare your local variables here
unsigned int adc_value;       // ADC result
float lm35_voltage;  // Voltage on Output of LM35
unsigned int lm35_temp;       // Current temperature
char buff[10];                // temp buff hold conversion from float number to string

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x2F;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// ADC initialization
// ADC Clock frequency: 115.200 kHz
// ADC Voltage Reference: AREF pin
ADMUX=ADC_VREF_TYPE;
ADCSRA=0x86;

while (1)
{
  // Get ADC value
  adc_value = read_adc(0);      
  // Calc to voltage value
  lm35_voltage = (float)adc_value*5/1023;
  ftoa(lm35_voltage,3,buff);
  printf("Voltage on output of LM35: %sV\n\r",buff);
  // Calc to temperature - note that LM35 has Linear +10.0 mV/C scale factor
  lm35_temp = (unsigned int)((float)adc_value*500/1023 + 0.5);
  printf("Current Temperature: %d.C\n\r",lm35_temp);
  delay_ms(2000);  
};
}

18.ADC_using_VR.

  • Sơ đồ mạch điện:


                                                                        Sơ đồ mạch điện.

  • Chương trình mẫu:

 

Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/

#include  "mega32.h"

// Standard Input/Output functions
#include  "delay.h"
#include  "stdio.h"
#include  "stdlib.h"

#define ADC_VREF_TYPE 0x00

// Read the AD conversion result
unsigned int read_adc(unsigned char adc_input)
{
ADMUX=adc_input|ADC_VREF_TYPE;
// Start the AD conversion
ADCSRA|=0x40;
// Wait for the AD conversion to complete
while ((ADCSRA & 0x10)==0);
ADCSRA|=0x10;
return ADCW;
}

// Declare your global variables here
unsigned int adc_value;
float input_voltage;

void main(void)
{
// Declare your local variables here
char buff[10];

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x2F;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// ADC initialization
// ADC Clock frequency: 115.200 kHz
// ADC Voltage Reference: AREF pin
ADMUX=ADC_VREF_TYPE;
ADCSRA=0x86;

while (1)
{
  adc_value = read_adc(0);
  printf("ADC value = %d\n\r",adc_value);
  input_voltage = ((float)adc_value*5)/1023;
  ftoa(input_voltage, 3, buff);
  printf("Input voltage = %sV\n\r", buff);
  delay_ms(1000);
};
}

19.ADC_using_AVR_LEDbar.

  • Sơ đồ mạch điện:


                                                                        Sơ đồ mạch điện.
 

  • Chương trình mẫu:

 

Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/

 

#include "mega32.h"

#include "delay.h"

#define ADC_VREF_TYPE 0x00

// Read the AD conversion result
unsigned int read_adc(unsigned char adc_input)
{
ADMUX=adc_input|ADC_VREF_TYPE;
// Start the AD conversion
ADCSRA|=0x40;
// Wait for the AD conversion to complete
while ((ADCSRA & 0x10)==0);
ADCSRA|=0x10;
return ADCW;
}

// Declare your global variables here

void main(void)
{
// Declare your local variables here
unsigned int vr_value;            // ADC result of voltage getting from VR.
unsigned long int led_bar_value;  // Temp led bar value after calculating.

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out 
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0 
PORTB=0x00;
DDRB=0xFF;

// Port C initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out 
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0 
PORTC=0x00;
DDRC=0xFF;

// Port D initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out 
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0 
PORTD=0x00;
DDRD=0xFF;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// ADC initialization
// ADC Clock frequency: 115.200 kHz
// ADC Voltage Reference: AREF pin
ADMUX=ADC_VREF_TYPE;
ADCSRA=0x86;

while (1)
{
  // Get ADC value on VR - it's connected to ADC0
  vr_value = read_adc(0); 
  // Here, we have 24 leds, so we assume 24 steps or 24 level.
  // Note that, the result is always be rounded DOWN, so 0.5 is added to this result.
  vr_value = (unsigned int)(((float)vr_value * 24) / 1023 + 0.5);
  // we must fill '1' value from 0 to current step
  led_bar_value = (1 << ((unsigned long int)vr_value)) - 1;
  // Send each byte of this value to each port
  PORTB = led_bar_value & 0xFF;
  PORTC = (led_bar_value >> 8) & 0xFF;
  PORTD = (led_bar_value >> 16) & 0xFF;
  // Delay for a while
  delay_ms(100);
};
}

20.TWI_I2C_AT24C1024.

  • Sơ đồ mạch điện:


                                                                        Sơ đồ mạch điện.

  • Chương trình mẫu:

 

Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/

#include  "mega32.h"

// Standard Input/Output functions
#include   "stdio.h"

// User's defines

// TWCR definitions
#define TWINT (1 << 7) 
#define TWEA (1 << 6) 
#define TWSTA (1 << 5) 
#define TWSTO (1 << 4) 
#define TWWC (1 << 3) 
#define TWEN (1 << 2) 
#define TWIE (1)


// macro used to get TWI return status code 
#define TWI_STATUS (TWSR & 0xF8)
// macro used to check int flag 
#define TWI_FLAG (TWCR & TWINT)


// Status code defines
// MT mode
#define MT_START 0x08
#define MT_REPEATSTART 0x10
#define MT_SLA_W_ACK 0x18
#define MT_SLA_W_NACK 0x20
#define MT_DATA_ACK 0x28
#define MT_DATA_NACK 0x30
// MR mode
#define MR_START 0x08
#define MR_REPEATSTART 0x10
#define MR_SLA_R_ACK 0x40
#define MR_SLA_R_NACK 0x48
#define MR_DATA_ACK 0x50
#define MR_DATA_NACK 0x58

// Return status defines
#define OK (0)
#define ERROR (1)

// EEPROM Device Address define - 0b10100A1P0
// In this case, A1 is pulled high, so EEPROM Address is (0b10100100 | (P0<
// See Datasheet for more details
#define EEPROM_ADDR (0b10100100)
// EEPROM Page Address define
#define P0_0 (0)
#define P0_1 (1<

unsigned char TWI_SendStart(void)
{
    TWCR = TWEN | TWSTA | TWINT;
    while(TWI_FLAG == 0);
    return TWI_STATUS;
}

unsigned char TWI_WriteData(unsigned char data)
{
    // write value to TWDR
    TWDR = data;
    TWCR = TWEN | TWINT;
    while(TWI_FLAG == 0);
    return TWI_STATUS;
}

unsigned char TWI_ReadData(unsigned char *data, unsigned char ack)
{
    if (ack){
        // return ack for next receive
        TWCR = TWEN | TWEA | TWINT;
    } else {
        // return nack
        TWCR = TWEN | TWINT;
    }
    while(TWI_FLAG == 0);
    // save data
    *data = TWDR;
    return TWI_STATUS;
}

void TWI_SendStop(void)
{
    TWCR = TWEN | TWSTO | TWINT;
}

unsigned char TWI_SendData(unsigned char slaveaddr, \
                            unsigned char *dataptr, \
                            unsigned char len)
{
    unsigned char i;
    unsigned char *ptr;
    
    ptr = dataptr;
    
    // send start
    if (TWI_SendStart() != MT_START) {
        printf("Send start error\n\r");
        // Send stop now
        TWI_SendStop();
        return ERROR;
    }
    // send slave address with write bit
    if (TWI_WriteData(slaveaddr) != MT_SLA_W_ACK) {
        printf("Send SLA + W error!\n\r");
        // Send stop now
        TWI_SendStop();
        return ERROR;
    }
    // Send data
    for (i = 0; i < len; i++){
        if (TWI_WriteData(*ptr++) != MT_DATA_ACK) {
            printf("Send data error\n\r");
            // Send stop now
            TWI_SendStop();
            return ERROR;
        }
    }
    
    // Send stop now
    TWI_SendStop();
    
    return OK;
}

unsigned char TWI_ReceiveData(unsigned char slaveaddr, unsigned char *dataptr, unsigned char len)
{
    unsigned char i;
    unsigned char *ptr;
    
    ptr = dataptr;
    
    // send start
    if (TWI_SendStart() != MR_START) {
        printf("Send start error\n\r");
        // Send stop now
        TWI_SendStop();
        return ERROR;
    }
    // send slave address with write bit
    if (TWI_WriteData(slaveaddr|0x01) != MR_SLA_R_ACK) {
        printf("Send SLA + R error!\n\r");
        // Send stop now
        TWI_SendStop();
        return ERROR;
    }
    for (i = 0; i < len; i++){
        if (i == (len - 1)){
            // This is the last data frame - return NACK
            if (TWI_ReadData(ptr++, 0) != MR_DATA_NACK) {
                printf("Send last data error\n\r");
                // Send stop now
                TWI_SendStop();
                return ERROR;
            }
        } else {
            // Not the last data frame - return ACK
            if (TWI_ReadData(ptr++, 1) != MR_DATA_ACK) {
                printf("Send data error\n\r");
                // Send stop now
                TWI_SendStop();
                return ERROR;
            }
        }
    }
    
    // Send stop now
    TWI_SendStop();
    
    return OK;
}

// Declare your global variables here
/* Data have following format: Most Significant Word Start Address, Least Significant Word Start Address, Data at Start Address, Data at (Start Address + 1), ect... */
unsigned char wr_data[4] = {0x00, 0x00, 0xAA, 0x55};
unsigned char rd_data[4] = {0x00, 0x00, 0, 0};

void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x2F;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// 2 Wire Bus initialization
// Generate Acknowledge Pulse: Off
// 2 Wire Bus Slave Address: 0h
// General Call Recognition: Off
// Bit Rate: 102.400 kHz
TWSR=0x00;
TWBR=0x1C;
TWAR=0x00;
TWCR=0x04;


// Try to write data at address 0x00 in EEPROM
printf("Data will be send: 0x%X 0x%X \n\r", wr_data[2], wr_data[3]);
// Send EEPROM Addr + MSB Word Addr + LSB Word Addr + 0xAA + 0x55
if (TWI_SendData((EEPROM_ADDR | P0_0), wr_data, 4) == OK){
    printf("Write data array successfully!\n\r");
}
// Send EEPROM Addr + MSB Word Addr + LSB Word Addr
if (TWI_SendData((EEPROM_ADDR | P0_0), rd_data, 2) == OK){
    printf("Write Addr Success!\n\r");
}
// Read data at current addr in EEPROM
// Send EEPROM Addr -> Receive 2 bytes of data
if (TWI_ReceiveData((EEPROM_ADDR | P0_0), rd_data + 2, 2) == OK){
    printf("Read data array successfully!\n\r");
}
printf("Read data: 0x%X 0x%X \n\r", rd_data[2], rd_data[3]);


while (1);
}

21.TWI_I2C_DS1307.

  • Sơ đồ mạch điện:


                                                                        Sơ đồ mạch điện.

  • Chương trình mẫu:

Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/

#include  "mega32.h"
#include "AT32_TWI.h"
#include "DS1307.h"
#include "delay.h"


// Standard Input/Output functions
#include

// Declare your global variables here
CLOCK_CFG_TYPE clockcfg;
DATE_TYPE datecfg;
TIME_TYPE timecfg;
HOUR_TYPE hourcfg;
char am_str[] = "AM";
char pm_str[] = "PM";

void main(void)
{
// Declare your local variables here
unsigned char temp_data;

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 57600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x07;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

/* Init configuration value ------------------------------------------------------------- */
// Clock config - OUT pin state in this case is unused!
clockcfg.clockout = 1;             // Enable clock output
clockcfg.clkfreq = FREQ_1Hz;     // 1Hz selected

// Date config - set to Jan-06-2010
datecfg.date = 6;
datecfg.day = WEDNESDAY;
datecfg.month = 1;
datecfg.year = 10;

// Time config - set to 12:04:00AM
timecfg.second = 0;
timecfg.minute = 4;
timecfg.hour = 12;

// Hour type config
hourcfg.hour_12_24 = 1; // 12h mode selected
hourcfg.hour_am_pm = 0; // AM


/* Init RTC DS1307 ---------------------------------------------------------------------- */
printf("Date will be set to %d-%d-%d in dd-mm-yy format\n\r", \
        datecfg.date, datecfg.month, datecfg.year);
if (hourcfg.hour_12_24){
    printf("Time in 12h mode format\n\r");
    printf("Time will be set to %d:%d:%d%s in hh:mm:ss(AM/PM) format\n\r", \
        timecfg.hour, timecfg.minute, timecfg.second,\
        ((hourcfg.hour_am_pm) ? pm_str : pm_str));
} else {
    printf("Time in 24h mode format\n\r");
    printf("Time will be set to %d:%d:%d in hh:mm:ss(AM/PM) format\n\r", \
        timecfg.hour, timecfg.minute, timecfg.second);
}


if (DS1307_Init(&clockcfg, &datecfg, &timecfg, &hourcfg) == OK){
    printf("Init DS1307 successfully!\n\r");
} else {
    printf("Init DS1307 fail!\n\r");
}

/* Read back date value ----------------------------------------------------------------- */
// Reset date data
datecfg.date = 0;
datecfg.day = SUNDAY;
datecfg.month = 0;
datecfg.year = 0;
if (DS1307_GetDate(&datecfg) == OK){
    printf("Get date successfully!\n\r");
    printf("Current Date: %d-%d-%d\n\r", \
        datecfg.date, datecfg.month, datecfg.year);
} else {
    printf("Get date fail!\n\r");
}

/* Demo with accessing to General Purpose RAM in DS1307 --------------------------------- */
// Init data to be sent
temp_data = 100;
printf("Now, write to RAM bank 10 with value = %d\n\r", temp_data);
if (DS1307_WriteRAM(10, temp_data) == OK){
    printf("Write value to RAM successfully!\n\r");
} else {
    printf("Write value to RAM fail!\n\r");
}

/* Read back value from RAM ------------------------------------------------------------- */
// Clear data
temp_data = 0;
printf("Now, read back value from RAM bank 10\n\r");
if (DS1307_ReadRAM(10, &temp_data) == OK){
    printf("Read value from RAM successfully! Data = %d\n\r", temp_data);
} else {
    printf("Read value from RAM fail!\n\r");
}

// Reset time data
timecfg.second = 0;
timecfg.minute = 0;
timecfg.hour = 0;

// Reset hour type
hourcfg.hour_12_24 = 0;
hourcfg.hour_am_pm = 0;

//Main loop
while (1){
    if (DS1307_GetTime(&timecfg, &hourcfg) == OK){
        printf("Current Time: %d-%d-%d%s\n\r", \
        timecfg.hour, timecfg.minute, timecfg.second,\
        ((hourcfg.hour_am_pm) ? pm_str : pm_str));
    } else {
        printf("Get time fail!\n\r");
    }
    delay_ms(3000);
}
}

22.TWI_I2C_MasterSlaveMode.

  • Sơ đồ mạch điện:


                                                                        Sơ đồ mạch điện.
 

  • Chương trình mẫu:
  • Code master

 

Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/

#include "mega32.h"
#include "delay.h"
#include "AT32_TWI.h"

// Standard Input/Output functions
#include

// User's defines
#define BUT PINB.0
#define LED PORTA.0

// Slave address
#define SLAVE_ADDR 0b10100000

// Declare your global variables here

void main(void)
{
// Declare your local variables here
unsigned char data;


// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=Out 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=0 
PORTA=0x00;
DDRA=0x01;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 57600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x07;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

TWI_Init();

printf("www.sangthai.com.vn!\n\r");
printf("This is demo for TWI - Master mode\n\r");


while (1){
    // Read button state on Master side and send that value to control LED on slave side
    data = BUT;
    if (TWI_SendData(SLAVE_ADDR,&data,1) == OK){
        //printf("Send data OK!\n\r");
    } else {
        printf("Send data error!\n\r");
    }
    
    // Receive data that contains button state on slave side and control LED on master side accordingly
    data = 0;
    if (TWI_ReceiveData(SLAVE_ADDR,&data,1) == OK){
        //printf("Receive data OK!\n\r");
        // Drive LED accordingly on master side
        LED = data;
    } else {
        printf("Receive data error!\n\r");
    }

    // delay a while
    delay_ms(100);
}

}

 

  • Code Slave

Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/

#include "mega32.h"
#include "AT32_TWI_Slave.h"

// Standard Input/Output functions
#include

// User's defines
#define BUT PINB.0
#define LED PORTA.0

// Declare your global variables here


// 2 Wire bus interrupt service routine
interrupt [TWI] void twi_isr(void)
{    
    unsigned char twcr_data;
    
    // Check status 
    switch (TWI_STATUS)
    {
        /* Slave Receive mode ---------------------------------------------------------- */
        // Data has been received and ACK has been returned
        case SR_PRE_SLA_W_DATA_ACK:
            // Get data out of TWDR and drive led
            LED = TWDR;
            break;
        /* Slave Transmit mode ---------------------------------------------------------- */
        // Own Slave address + R has been received and ACK has been returned
        case SR_SLA_R_ACK:
            // Load data to be sent in next data byte
            TWDR = BUT;
            break;
        /* All remaining case ----------------------------------------------------------- */
        default:
            // Nothing to do here
            break;
    }
    
    // Clear TWINT flag, skip TWEN, TWEA and TWIE bit enabled
    twcr_data |= TWINT | TWEN | TWIE | TWEA;
    TWCR = twcr_data;
}

void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=Out 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=0 
PORTA=0x00;
DDRA=0x01;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 57600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x07;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// 2 Wire Bus initialization
// Generate Acknowledge Pulse: On
// 2 Wire Bus Slave Address: 50h
// General Call Recognition: On
// Bit Rate: 102.400 kHz
TWSR=0x00;
TWBR=0x1C;
TWAR=0xA1;
TWCR=0x45;

#asm("sei")

while (1);

}

23.SPI_HC595.

  • Sơ đồ mạch điện:


                                                                        Sơ đồ mạch điện.

  • Chương trình mẫu:

Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/

#include "mega32.h"

// Standard Input/Output functions


#include "spi.h"

// SPI functions
#include "stdio.h"

// User's defines
#define LATCH PORTB.0

// Declare your global variables here

void main(void)
{
// Declare your local variables here
unsigned char input_hex;

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=In Func2=In Func1=In Func0=Out 
// State7=0 State6=0 State5=0 State4=0 State3=T State2=T State1=T State0=0 
PORTB=0x00;
DDRB=0xF1;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x2F;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// SPI initialization
// SPI Type: Master
// SPI Clock Rate: 1843.200 kHz
// SPI Clock Phase: Cycle Start
// SPI Clock Polarity: High
// SPI Data Order: MSB First
SPCR=0x5C;
SPSR=0x00;

LATCH = 0;

while (1){
    printf("Enter a hex number: ");
    scanf("%x",&input_hex);
    spi(input_hex);
    LATCH = 1;
    LATCH = 0;
}
}

24.SPI_Master_Slave
  • Sơ đồ mạch điện:

                                                                        Sơ đồ mạch điện.
  •  
    • Chương trình mẫu:
  • Code master

Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512
*****************************************************/

#include "mega32.h"
#include"delay.h"

// Standard Input/Output functions
#include "stdio.h"

// SPI functions
#include "spi.h"

// SS
#define SS PORTB.0
#define EN 0
#define DIS 1

// Declare your global variables here
unsigned char master_data = 0;
unsigned char slave_data = 0;

void main(void)
{
// Declare your local variables here
unsigned char i;


// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=Out Func6=In Func5=Out Func4=Out Func3=In Func2=In Func1=In Func0=In 
// State7=0 State6=T State5=0 State4=0 State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0xB1;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x2F;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// SPI initialization
// SPI Type: Master
// SPI Clock Rate: 1843.200 kHz
// SPI Clock Phase: Cycle Half
// SPI Clock Polarity: Low
// SPI Data Order: MSB First
SPCR=0x50;
SPSR=0x00;

SS = DIS;

while (1){
    SS = EN;
    printf("Master: Transfer!\n\r");
    slave_data = spi(master_data++); 
    
    SS = DIS;
    printf("Master: Slave data = 0x%X\n\r", slave_data);
    delay_ms(2000);
}
}

  • Code Slave

Chip type           : ATmega32
Program type        : Application
Clock frequency     : 7.372800 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 512

*****************************************************/

#include  "mega32.h"
#include  "delay.h"

// Standard Input/Output functions
#include "spi.h"

unsigned char master_data = 0;
unsigned char slave_data = 0;

// SPI interrupt service routine
interrupt [SPI_STC] void spi_isr(void)
{
    master_data = SPDR;
    SPDR = slave_data++;
    // Place your code here
    printf("Slave: Master data = 0x%X\n\r", master_data);
}

// Declare your global variables here

void main(void)
{
// Declare your local variables here


// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=Out Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=0 State5=T State4=T State3=T State2=T State1=T State0=T 
PORTB=0x00;
DDRB=0x40;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x2F;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// SPI initialization
// SPI Type: Slave
// SPI Clock Rate: 1843.200 kHz
// SPI Clock Phase: Cycle Half
// SPI Clock Polarity: Low
// SPI Data Order: MSB First
SPCR=0xC0;
SPSR=0x00;


// Clear the SPI interrupt flag
#asm
    in   r30,spsr
    in   r30,spdr
#endasm

// Global enable interrupts
#asm("sei")

SPDR = slave_data++;

while (1);

}

Nguồn: sangthai.com
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