Mam problem z obsłużeniem RTC. Program oczywiście zrobiony według BlueBooka:
main.c
[syntax=c]#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <avr/pgmspace.h>
#include "MKUART/mkuart.h"
#include "Terminal/term.h"
#include "I2C/i2c.h"
volatile uint16_t Timer1, Timer2;
enum {ss, mm, hh};
uint8_t bufor[3];
uint8_t sekundy, minuty, godziny;
int main(void) {
USART_Init( __UBRR );
//***********************Ustawienie TIMER0*************************
TCCR0 |= (1<<WGM01);// tryb pracy CTC
TCCR0 |= (1<<CS02)|(1<<CS00);// preskaler = 1024
OCR0 = 15;// przerwanie porównania co 100Hz
TIMSK |= (1<<OCIE0);// Odblokowanie przerwania CompareMatch
//*****************************************************************
sei();
term_clear();
term_cursor_hide(1);
term_locate(2,2);
term_color_write(3);
uart_puts("Test I2C");
term_locate(1, 30);
TWI_read_buf(0xA2, 0x02, 3, bufor);
sekundy = bcd2dec( bufor[ss] );
minuty = bcd2dec( bufor[mm] );
godziny = bcd2dec( bufor[hh] );
uart_putint(godziny);
uart_putc(':');
uart_putint(minuty);
uart_putc(':');
uart_putint(sekundy);
while(1){}
}
ISR( TIMER0_COMP_vect ){
static uint8_t x;
x = Timer1; // 100Hz Timer1
if (x) Timer1 = --x;
x = Timer2; // 100Hz Timer2
if (x) Timer2 = --x;
}[/syntax]
Wyświetla się jedynie napis "Test I2C", po czym program łapie "laga". Dodawałem do pętli while debug w postaci migającej diody lecz ta jest cały czas zgaszona, więc na 100% coś przy funkcjach I2C.
i2c.c
[syntax=c]#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <avr/pgmspace.h>
#include "i2c.h"
#define ACK 1
#define NACK 0
void TWI_start( ){
TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTA);
while ( !(TWCR & (1<<TWINT)) );
}
void TWI_stop( ){
TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTO);
while ( !(TWCR & (1<<TWSTO)) );
}
void TWI_write( uint8_t bajt ){
TWDR = bajt;
TWCR = (1<<TWINT)|(1<<TWEN);
while ( !(TWCR & (1<<TWINT)) );
}
uint8_t TWI_read( uint8_t ack ){
TWCR = (1<<TWINT) | (ack<<TWEA) | (1<<TWEN);
while ( !(TWCR & (1<<TWINT)) );
return TWDR;
}
void TWI_write_buf( uint8_t SLA, uint8_t adr, uint8_t len, uint8_t *buf){
TWI_start();
TWI_write(SLA);
TWI_write(adr);
while (len--) TWI_write(*buf++);
TWI_stop();
}
void TWI_read_buf( uint8_t SLA, uint8_t adr, uint8_t len, uint8_t *buf){
TWI_start();
TWI_write(SLA);
TWI_write(adr);
TWI_start();
TWI_write(SLA + 1);
while (len--) *buf++ = TWI_read( len ? ACK : NACK );
TWI_stop();
}
uint8_t dec2bcd( uint8_t dec ){
return ((dec / 10) << 4) | (dec % 10);
}
uint8_t bcd2dec( uint8_t bcd ){
return ((((bcd) >> 4) & 0x0F) * 10) + ((bcd) & 0x0F);
}[/syntax]
i2c.h
[syntax=c]#ifndef I2C_H_
#define I2C_H_
/*FUNKCJE GLOBALNE*/
void TWI_start();
void TWI_stop();
void TWI_write( uint8_t bajt );
uint8_t TWI_read( uint8_t ack );
void TWI_read_buf( uint8_t SLA, uint8_t adr, uint8_t len, uint8_t *buf);
void TWI_write_buf( uint8_t SLA, uint8_t adr, uint8_t len, uint8_t *buf);
uint8_t bcd2dec( uint8_t bcd );
#endif /* I2C_H_ */[/syntax]Statystyki: Napisane przez 4MaticPL — 5 lip 2014, o 10:47
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