vciled_test.c

基于X86系统的Linux下的LED driver开发的example code, 并附带有相应的测试程序。

#include <sys/mman.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <asm/types.h>
#include <sys/select.h>
#include <termios.h>
#include <stropts.h>

#include "LED_Config.h"

#define LED_CONFIG_MAJOR 0

/* Use 'k' as magic number */
//#define LED_Config_IOC_MAGIC  'X'
/* Please use a different 8-bit number in your code */


//#define LED_Config_IOC_Status _IOWR(LED_Config_IOC_MAGIC, 9,int)
//#define LED_Config_IOC_Setting _IOWR(LED_Config_IOC_MAGIC, 8,int)



#define LED_Config_Data_fail                 0x4
#define LED_low_Data_fail                    0x0


int main(int argc, char **argv)
{
    char *fname;
	int f;
	int status=1;
	int ret=-1;
	//int mcudata;
    if (argc != 2)
	{
        	fprintf(stderr, "%s: Usage \"%s  <parameter>\"\n", argv[0],argv[0]);
        	exit(1);
    	}	


    	fname="/dev/LED_Config";
	status = atoi(argv[1]);
    if (!(f=open(fname,O_RDWR))) {
        fprintf(stderr, "%s: %s: %s\n", argv[0], fname, strerror(errno));
        exit(1);
    }
		switch(status)
		{
		case 0:
			ret = ioctl(f, LED_PRE_ON, &status);
		//	fprintf(stderr, " COMMAND = %d\n",LED_PRE_ON);
			break;
		case 1:
			ret = ioctl(f,LED_PRE_OFF,&status);
			break;				
		case 2:
			ret=ioctl(f,LED_PRE_BLINK,&status);
			break;
		case 3:
			ret = ioctl(f, LED_COM_ON, &status);
			break;
		case 4:
			ret= ioctl(f, LED_COM_OFF,&status);
			break;
		case 5:
			ret = ioctl(f, LED_COM_BLINK,&status);
			break;	
		default:
			ret=-1;
		 	break;		
		}
//		ret = ioctl(f, LED_Config_IOC_Setting, &status);
		fprintf(stderr, " LED Set status = %x\n",status);
		if (ret < 0) {
			fprintf(stderr, "executing this operation error\n");
		}


	
	close(f);
    
    return ret;
}