#include <stdio.h>#include <unistd.h>#include <fcntl.h>                                /* 文件操作 */#include <sys/ioctl.h>				  /* ioctl()函數(shù) */#include "i2c.h"                                  /* I2C 命令 */#define	 I2C_ADDR 	0x70                          /* zlg7290從機(jī)地址 */int fd;int zlg7290_getkey(unsigned short *key);int zlg7290_sndcmd(unsigned char dat1, unsigned char dat2);void zlg7290_disp(unsigned char *buf, unsigned char num);int main(){    int ret,i;    unsigned char buf[9];    unsigned short key;   	fd = open("/dev/i2c/0", O_RDWR);              /* 打開(kāi)設(shè)備 */    if(fd == -1)    {        printf("Can't open I2C device!\n");        exit(-1);    }     ret = ioctl(fd, I2C_TENBIT, 0);               /* 指定從機(jī)地址為7bit */    if (ret != 0)    {    	printf("Can't set I2C address bit number.\n");    	close(fd);    	exit(-1);    }     ret = ioctl(fd, I2C_SLAVE, I2C_ADDR >> 1);    /* 設(shè)置從機(jī)地址,7位地址,須右移1位*/    if (ret != 0)    {    	printf("Can't set I2C slave device address.\n");    	close(fd);    	exit(-1);    }	/* 設(shè)置I2C總線頻率小于30KHz */	ret = ioctl(fd, I2C_S3C2410_SET_SPEED, 3);	  /* 3為I2C總線頻率分頻值 */  	if (ret != 0)	{		printf("Can't set I2C speed.\n");			close(fd);		exit(-1);	}		/* 讀取I2C總線頻率 */	    ret = ioctl(fd, I2C_S3C2410_GET_SPEED, &i);  	if (ret != 0)  	{		printf("Can't read I2C speed.\n");		close(fd);			exit(-1);  		  	}   	printf("I2C Speed is:%dKHz\n", i);    // S3C2410A //    buf[7] = 0x05;    buf[6] = 0x03;    buf[5] = 0x0C;    buf[4] = 0x02;    buf[3] = 0x04;    buf[2] = 0x01;    buf[1] = 0x00;    buf[0] = 0x0A;	/* 顯示 S3C2410A */    zlg7290_disp(buf, 8);						 	        for (;;)    {        if (zlg7290_getkey(&key) != 0)					/* 讀取按鍵鍵值 */        {        	printf("Read key value fail\n");        	exit(-1);	        }                if (zlg7290_sndcmd(0x70, 1<<(key - 1)) != 0)	/* 閃爍 */        {        	printf("Display fail\n");        	exit(-1);        }                usleep(1000);     }    close(fd);     return 0;}/*********************************************************************************************************** Function name: zlg7290_getkey** Descriptions:  get the key value from zlg7290**                從zlg7290取得按鍵鍵值	** Input: 		  unsigned short *key:  the gotten key value** Output: 		  0 : OK   -1: fail ** Created by:    Ming Yuan Zheng 鄭明遠(yuǎn) ** Created Date:  2006-01-09 **-------------------------------------------------------------------------------------------------------** Modified by:** Modified Date: **------------------------------------------------------------------------------------------------------********************************************************************************************************/int zlg7290_getkey(unsigned short *key){    unsigned char temp[2];    temp[0] = 1;    temp[1] = 0;    if (write(fd, temp, 1) != 1)				/* 發(fā)送子地址 */    	return -1;    		if (read(fd, temp, 2) != 2)					/* 讀取鍵值 */		return -1;		*key = temp[0] + (temp[1] * 256);		return 0;}/*********************************************************************************************************** Function name: zlg7290_sndcmd** Descriptions:  send command to zlg7290**                向zlg7290發(fā)送命令** Input: 		  unsigned char dat1: command word 1				  unsigned char dat2: command word 2** Output: 		  0 : OK   -1: fail ** Created by:    Ming Yuan Zheng 鄭明遠(yuǎn) ** Created Date:  2006-01-09 **-------------------------------------------------------------------------------------------------------** Modified by:** Modified Date: **------------------------------------------------------------------------------------------------------********************************************************************************************************/int zlg7290_sndcmd(unsigned char dat1, unsigned char dat2){    unsigned char temp[3];    temp[0] = 0x07;    temp[1] = dat1;    temp[2] = dat2;       if (write(fd, temp, 3) != 3)    	return -1;    	    usleep(1000);    return 0;}/*********************************************************************************************************** Function name: zlg7290_disp** Descriptions:  control zlg7290 to driver led**                控制zlg7290驅(qū)動(dòng)led** Input: 		  unsigned char *buf: display buffer				  unsigned char num: display number** Output: 		  NULL** Created by:    Ming Yuan Zheng 鄭明遠(yuǎn) ** Created Date:  2006-01-09 **-------------------------------------------------------------------------------------------------------** Modified by:** Modified Date: **------------------------------------------------------------------------------------------------------********************************************************************************************************/void zlg7290_disp(unsigned char *buf, unsigned char num){    unsigned char i;    unsigned char temp[3];    for(i=0; i<num; i++)    {        temp[0] = 0x07;        temp[1] = 0x60+i;        temp[2] = *buf;        buf++;        write(fd, temp, 3);        usleep(5000);    }}/****************************************************************************                            End Of File**************************************************************************/