main.c

一个6缸发动机的ECU控制程序

//ICC-AVR application builder : 2007-4-24 9:11:17
// Target : M88
// Crystal: 8.0000Mhz

#include <iom88v.h>
#include <macros.h>
#include <uart.c>
#include <timer1.c>
//#include <stdlib.h>

//extern char _bss_end;
//ADC initialize
// Conversion time:128 prescale 208uS,free running,AVCC
//unsigned char AdcIntrCnt = 0;

/*void adc_init(void)
{
 ADCSRA = 0x00; //disable adc
 ADMUX = 0x42;  //select adc input 2,REF = AVCC
 ACSR  = 0x80;
 ADCSRB = 0x00;
 DIDR0 = 0x04;   //禁用ADC2数字输入缓冲
 ADCSRA = 0xEF;

}*/

/*#pragma interrupt_handler adc_isr:iv_ADC
void adc_isr(void)
{
 //conversion complete, read value (int) using...

   int value;
   int pressure;
   char *ptr;
   float cal;

   value=ADCL;            //Read 8 low bits first (important)
   value|=(int)ADCH << 8; //read 2 high bits and shift into top byte

 if(++AdcIntrCnt > 100)
 {
//   PORTB = PORTB ^( 1<<PB3);  //debug
   AdcIntrCnt = 0;
   
//   putchar(ADCL);   //debug
//   putchar(ADCH);   //debug

   // 进行相应转换，并发送
//   if(value > 204)        //电压应该大于1v
   {
     cal = value * 20/ 1023;   //Ima,R = 250ohm
     cal = (cal - 4) / 16 * 350 ;   //pressure/bar
     pressure = (int)cal;
     ptr = (char*)&pressure;
     putchar(*ptr);        //传送压力低字节
     putchar(*(ptr + 1));    //传送压力高字节
   }

 }
}*/



void port_init(void)
{
 PORTB = 0x00;
 DDRB  = 0x1E;
 PORTC = 0x00; //m103 output only
 DDRC  = 0x00;
 PORTD = 0x08;
 DDRD  = 0x38;
}

//call this routine to initialize all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();
 timer1_init();
 uart0_init();
 //timer0_init();
 //adc_init();

 MCUCR = 0x00;
 EICRA = 0x00; //extended ext ints
 EIMSK = 0x00;

 TIMSK0 = 0x06; //timer 0 interrupt sources
 TIMSK1 = 0x07; //timer 1 interrupt sources
 TIMSK2 = 0x00; //timer 2 interrupt sources

 PCMSK0 = 0x00; //pin change mask 0
 PCMSK1 = 0x00; //pin change mask 1
 PCMSK2 = 0x00; //pin change mask 2
 PCICR = 0x00; //pin change enable
 PRR = 0x00; //power controller
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
}



void main(void)
{
 unsigned int waitFlag = 0;      //串口通讯等待时间计数
 unsigned char frameLength = 12;  //帧长度
 char i = 0;
 
// _NewHeap(&_bss_end + 1,&_bss_end+40);
 //初始化外围器件
 init_devices();

 while(1)
 {
   if(FrameHead0 > 0)      //帧接收中
    {
		 TCCR1B = 0x00;        //关定时器1,准备接收数据
		 //ADCSRA = ADCSRA & ~(1<<ADIE);        //disable adc interrupt
	     putchar(IDLE);       //为和数据区分开，采用两字节的控制命令
		 putchar(IDLE);
		 i = 1;
     while(i)
	 {	
	  if(rx_counter0 == frameLength)   //缓冲区收到规定字符数
	   {
	     //处理缓冲区数据
		 DisposeBufDatas();
//		 FlashRxBuf();     //debug
		 waitFlag = 0;
		 timer1_init();    //开定时器
		 //ADCSRA = ADCSRA | (1<<ADIE);        //enable adc interrupt
		 i = 0;
		
	   }
      else
	   {
	     waitFlag++;
		 if(waitFlag == 0xFFFF)     //等待超时，刷新缓冲区
		  {
		    waitFlag = 0;
			FlashRxBuf();
	        putchar(250);  //回传超时标志 debug
            putchar(250);  //回传chongfa曛