SPI.rar_AVR twi_atmega8_atmega8 proteus_atmega8 spi_spi proteus

#include <avr/io.h> #include <avr/interrupt.h> #include <util/delay.h> #include <avr/wdt.h> #define uint8 unsigned char ; #define uint32 unsigned int ; //mega8 #define DDR_SPI DDRB #define PORT_SPI PORTB #define SS PB2 //ss input #define MOSI PB3 //mosi input #define MISO PB4 //miso output #define SCK PB5 //sck input #define RX_ON PORTB|= (1<<PB0); #define TX_ON PORTB&=~(1<<PB0); //led volatile unsigned char LED_S = 0; #define LED_CLR PORTC|= (1<<PC0); #define LED_SET PORTC&=~(1<<PC0); volatile unsigned char Timer_Count=0; volatile unsigned char Second_Count=0; volatile unsigned char send=0; volatile unsigned char i,bit; unsigned char buf[20]; void LED_T(void) { if((LED_S%2)==0) {LED_SET;} else LED_CLR; LED_S++; } void init_Timer0(void) { TCNT0=0x4a; TCCR0=_BV(CS02)|_BV(CS00); //ck/1024 TIMSK=_BV(TOIE0); //enable Timer0 interrupt } ISR (SIG_OVERFLOW0) //20ms { TCNT0=0x4a; Timer_Count++; if(Timer_Count>=50) { Timer_Count=0; Second_Count++; send=1;TX_ON; LED_SET; } } ISR(SIG_INTERRUPT0) { if(buf[i]&_BV(bit)) PORTB|= _BV(MISO); else PORTB&=~_BV(MISO); if(bit==0) { i++; bit=7; if(i==18) { RX_ON;send=0;i=0;LED_CLR; } } else bit--; } int main() { //init port DDRB &=~_BV(PB1); //PB1 input PORTB|=_BV(PB1); DDRB|=_BV(PB0); //PB0 output DDRC|=_BV(PC0); //PC0 output PORTC|=_BV(PC0); LED_SET; _delay_ms(25); LED_CLR; while(!(PINB & _BV(PB1)) ); //if SET=0,wait DDRB &=(~_BV(MOSI)); // input PORTB|= _BV(MOSI); DDRB|=_BV(MISO); //output init_Timer0(); MCUCR |= 0x02; GICR |= 0x40; sei(); for(i=0;i<16;i++) buf[i]=0xaa; buf[16]=0x33;buf[17]=0x33; i=0;bit=7; while (1) { ; } return 0; }