将驱动放入/extdrv中编译
部分驱动如下：
#include <linux/module.h>
#include <linux/miscdevice.h>#include <linux/init.h>#include <linux/slab.h>#include <linux/i2c.h>#include <linux/string.h>#include <linux/rtc.h>#include <linux/bcd.h>#include <linux/kernel.h>#include <linux/version.h>#include <linux/module.h>#include <linux/types.h>#include <linux/errno.h>#include <linux/fcntl.h>#include <linux/mm.h>#include <linux/miscdevice.h>#include <linux/proc_fs.h>#include <linux/fs.h>#include <linux/slab.h>#include <linux/smp_lock.h>#include <linux/init.h>#include <asm/uaccess.h>#include <asm/hardware.h>#include <asm/io.h>#include <asm/system.h>#include <linux/interrupt.h>#include <linux/ioport.h>#include <linux/string.h>#include <linux/list.h>#include <asm/semaphore.h>#include <asm/delay.h>#include <linux/timer.h>#include <linux/delay.h>#include <linux/proc_fs.h>#include <linux/poll.h>#include <asm/hardware.h>#include <asm/bitops.h>#include <asm/uaccess.h>#include <asm/irq.h>#include <linux/moduleparam.h>#include <linux/ioport.h>#include <linux/interrupt.h>#include "gpio_i2c.h"#include "gpio_i2c1.h"#include "rtc-ds1339.h"#define ENABLE_TEST
#define DS1339_BIT_CENTURY0x80/* in REG_MONTH */
static unsigned char rtc1339_byte_read(unsigned char chip_addr, unsigned char addr);static unsigned char rtc1339_byte_write(unsigned char chip_addr, unsigned char addr, unsigned char data){ #ifdef ENABLE_TEST unsigned char reg_val; #endif gpio_i2c_write(chip_addr, addr, data); #ifdef ENABLE_TEST reg_val = rtc1339_byte_read(chip_addr, addr); if(reg_val != data) { printk("ec6214_byte_write error: addr:%x, reg:%x, val:%x, read:%x\r\n", chip_addr, addr, data, reg_val); } #endif return 0;}static unsigned char rtc1339_byte_read(unsigned char chip_addr, unsigned char addr){ unsigned char reg_val; reg_val = gpio_i2c_read(chip_addr, addr); return reg_val;}/////////////////////////////////////////////////////////////////////////////////***********open the ds1339*****************************************//int ds1339_open(struct inode * inode,struct file *file){return 0;}/////////////////////////////////////////////////////////////////////////////////***********close the ds1339*****************************************//int ds1339_close(struct inode * inode,struct file *file){return 0;}
… …
示例如下：
#include <stdio.h>#include <stdlib.h>/* getenv() */#include <string.h>#include <sys/types.h>#include <sys/stat.h>#include <unistd.h>#include <fcntl.h>#include <sys/ioctl.h>#include <error.h>#include <sys/time.h>#include <unistd.h>#include <time.h>#include <getopt.h>#include <linux/rtc.h>#include "rtc-ds1339.h"int Init(){int fd;//open device filefd = open("/dev/rtc-ds1339",O_RDWR);if(fd < 0){printf("device open fail\n");return -1;}return fd;}int main(int agc,char **agv){int fd,ch;struct rtc_time{unsigned int tm_sec;unsigned int tm_min;unsigned int tm_hour;unsigned int tm_wday;unsigned int tm_date;unsigned int tm_month;unsigned int tm_year;};struct rtc_time tm;tm.tm_year=2013;tm.tm_month=03;tm.tm_date=14;tm.tm_wday=4;tm.tm_hour=16;tm.tm_min=18;fd=Init();if (fd>0){if (ioctl(fd,CMD_SET_TIME,&tm)<0)printf ("ioctl eo\n");while(1){ioctl(fd,CMD_GET_TIME,&tm);printf("%02d.%02d.%02d,%01d,%02d:%02d:%02d\n",tm.tm_year,tm.tm_month,tm.tm_date,tm.tm_wday,tm.tm_hour,tm.tm_min,tm.tm_sec);sleep(1);}close(fd);}return 0;}
运行结果如下：
需源码的访问：
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