app.c

读取frv实验系统上的按键值 并以此来控制frv实验板上的led 基于嵌入式linux

#include <sys/ioctl.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <linux/fr400cc_vdc.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#include <math.h>
#define FPGA_SW_IOC_MAGIC 		0xdc
#define FPGA_SWITCH_READ  		_IOR(FPGA_SW_IOC_MAGIC,0,int)
#define FPGA_LED  				_IOW(FPGA_SW_IOC_MAGIC,1,int)

#define SW5  0x7bff
#define SW7  0x77ff
#define SW8  0x6fff
#define SW9  0x5fff
#define SW10  0x3fff
 
#define sw4up 0x7e7f
#define sw4press 0x7dff
#define sw4down 0x7f9f

#define sw6up 0x7ff3
#define sw6press 0x7fef
#define sw6down 0x7ffc

int main()
{
	int fd,key;
	fd =open("keyled",O_RDONLY);
	if(fd<0) printf("Fail to open the device 'keyled'\n");
	while(1)
	{
		sleep(2);
		ioctl(fd,FPGA_SWITCH_READ,&key);	
		switch (key)
		{
			case SW5:			ioctl(fd,FPGA_LED,0xff);break;
			case SW7:			ioctl(fd,FPGA_LED,0xfe);break;
			case SW8: 			ioctl(fd,FPGA_LED,0xfd);break;
			case SW9: 			ioctl(fd,FPGA_LED,0xfc);break;
			case SW10: 			ioctl(fd,FPGA_LED,0xfb);break;
			case SW4up: 		ioctl(fd,FPGA_LED,0xfa);break;		
			case SW4press: 		ioctl(fd,FPGA_LED,0xf9);break;
			case SWdown: 		ioctl(fd,FPGA_LED,0xf8);break;
			case SWup: 			ioctl(fd,FPGA_LED,0xf7);break;
			case SWpress: 		ioctl(fd,FPGA_LED,0xf6);break;
			case SWdown: 		ioctl(fd,FPGA_LED,0xf5);break;
			default:			printf("No key is pressed!\n");break;
		}
	}
	close(fd);
	return 1;
}