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/******************************************************************************
*Name: timeled.c
*Desc: led实时动态显示系统时间，其中led3/led2显示小时，led1/led0显示分钟
* led7/led6显示秒。该程序运行前，应先使用insmod i2c.o命令加载驱动。
*Parameter:
*Return:
*Author: yoyoba([email protected])
*Date: 2010-9-20
*Modify: 2010-9-20
********************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <linux/i2c.h>
#include <linux/fcntl.h>
#include <sys/stat.h>
#include "test-8led.h"
#include <sys/types.h>
/* control code */
#define I2C_SET_DATA_ADDR 0x0601
#define I2C_SET_BUS_CLOCK 0x0602
unsigned char digit[] ={0xFC,0x60,0xDA,0xF2,0x66,0xB6,0xBE,0xE0,0xFE,0xF6,0xEE,0x3E,0x9C,0x7A,0x9E,0x8E}; //led显示0-F的编码
void gettime(int returntime[6]) //获得当前时间的时、分、秒信息，共6位数字，依次放入数组returntime中。
{
time_t mytime_t;
struct tm* mytm;
time(&mytime_t);
mytm=localtime(&mytime_t);
returntime[0]=mytm->tm_hour/10;
returntime[1]=mytm->tm_hour%10;
returntime[2]=mytm->tm_min/10;
returntime[3]=mytm->tm_min%10;
returntime[4]=mytm->tm_sec/10;
returntime[5]=mytm->tm_sec%10;
}
int main()
{
int fd,index=0;
//char chon=0xff,choff=0x0,key=0;
int mygettime[6];
printf("this is a example for 8-led,writed by youhaidong!\n");
if((fd=open("/dev/i2c/0",O_RDWR))==-1) /*打开i2c设备*/
{
printf("open led device FAILD!\n");
exit(1);
}
else
printf("open led device SUCCESS!\n");
ioctl(fd, I2C_SLAVE_FORCE, ZLG_SLAVE_ADDR); /*设置zlg7290从设备地址*/
ioctl(fd, I2C_SET_BUS_CLOCK, 250*1000); /*设置i2c总线时钟频率为250khz*/
while(1)
{
gettime(mygettime);
ioctl(fd,I2C_SET_DATA_ADDR,REG_Dis3); //led3显示小时的高位
write(fd,&digit[mygettime[0]],1);
ioctl(fd,I2C_SET_DATA_ADDR,REG_Dis2); //led2显示小时的低位
write(fd,&digit[mygettime[1]],1);
ioctl(fd,I2C_SET_DATA_ADDR,REG_Dis1); //led1显示分钟的高位
write(fd,&digit[mygettime[2]],1);
ioctl(fd,I2C_SET_DATA_ADDR,REG_Dis0); //led0显示分钟的低位
write(fd,&digit[mygettime[3]],1);
ioctl(fd,I2C_SET_DATA_ADDR,REG_Dis7); //led7显示秒的高位
write(fd,&digit[mygettime[4]],1);
ioctl(fd,I2C_SET_DATA_ADDR,REG_Dis6); //led6显示秒的低位
write(fd,&digit[mygettime[5]],1);
}
printf("led example is over!\n");
return 0;
}
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