test_can.c

arm-linux 下小键盘驱动程序源码

#include <stdlib.h>

#define cana_addr 0xeb300000
#define canb_addr 0xeb308000

struct CanControl 
{
   unsigned short CR; //控制寄存器
   unsigned short CMR;//命令寄存器
   unsigned short SR; //状态寄存器 
   unsigned short IR;//中断寄存器
   unsigned short ACR;//验收寄存器
   unsigned short AMR;//屏蔽寄存器
   unsigned short BTR0;
   unsigned short BTR1;
   unsigned short OCR;
   unsigned short TR; // 寄存器00..09
   unsigned short TxDSCR[2],TxData[8];//发送ID,数据 10..19
   unsigned short RxDSCR[2],RxData[8];//接收ID,数据 20..29
   unsigned short XX30,CDR;//31 时钟驱动 30..31
};
static struct CanControl *pcana=cana_addr;
static struct CanControl *pcanb=canb_addr;

int main(int argc,char *argv[])
{
	int volatile *p;
	short volatile *p1;
	short tmp;
	int i,j=0;
	
	pcana->CDR = tmp|0x03;
	pcana->CR=0x0f;
  pcana->CMR=0;
  pcana->ACR=0x07;
  pcana->AMR=0xff;
  pcana->OCR=0xfa;
	pcana->BTR0=0x01;
	pcana->BTR1=0x14;
	
	pcanb->CDR = tmp|0x03;
  pcanb->CR=0x0f;
  pcanb->CMR=0;
  pcanb->ACR=0x07;
  pcanb->AMR=0xff;
  pcanb->OCR=0xfa;
	pcanb->BTR0=0x01;
	pcanb->BTR1=0x14;
	//pcanb->BTR0=0x01;
	//pcanb->BTR1=0x14;
	getchar();
	printf(" 8bit read on 8bit device:%x,%x\n",pcana->BTR0&0xff,pcana->BTR1&0xff);
	printf(" 8bit read on 8bit device:%x,%x\n",pcanb->BTR0&0xff,pcanb->BTR1&0xff);
	printf("we can test\n");
	pcana->CR = 0x0e;
	pcanb->CR = 0x0e;
	printf("RxDsCR is %x,%x\n",pcanb->RxDSCR[0],pcanb->RxDSCR[1]);
	for(i=0;i<8;i++) printf("the data %x is %x\n",i,pcanb->RxData[i]);
	getchar();
	while(1)
	{
		j++;
		//pcana->CR &= 0xfe;
		//pcana->CR &= 0xfe;
		printf("CR=%x\n",pcana->CR&0xff);
		pcana->TxDSCR[0] = 0x00;
	  pcana->TxDSCR[1] = 0x08;
	  for(i=0;i<8;i++) pcana->TxData[i]=i+j;
	  printf("the length is %x\n",pcana->TxDSCR[1]);
	  for(i=0;i<8;i++) printf("the data %x is %x\n",i,pcana->TxData[i]);
	  printf("wait for key\n");
	  pcana->CMR=0x01;
	  getchar();
	  printf("CANA:\n");
	  printf(" is %x,%x\n",pcanb->RxDSCR[0],pcanb->RxDSCR[1]);
	  printf("CANB:\n");
	  printf("RxDsCR is %x,%x\n",pcanb->RxDSCR[0],pcanb->RxDSCR[1]);
	  for(i=0;i<8;i++) printf("the data %x is %x\n",i,pcanb->RxData[i]);
	  pcanb->CMR= 0x04;
	}
	return 0;
}