DS1307-Linux测试成功.doc

DS1307-Linux测试成功 1、编译内核支持： 2、添加设备以及注册设备： 添加设备： static struct i2c_board_info ek_i2c_devices[] __initdata = { { .driver_name = rtc-ds1307, .addr = 0x68, .type = ds1338, }, }; 注册： 方法一：（首选） at91_add_device_i2c(ek_i2c_devices,ARRAY_SIZE(ek_i2c_devices)); 方法二： i2c_register_board_info(0,ek_i2c_devices,ARRAY_SIZE(ek_i2c_devices)); 3、测试： 测试代码： /* * Real Time Clock Driver Test/Example Program * Compile with: * gcc -s -Wall -Wstrict-prototypes rtctest.c -o rtctest * Copyright (C) 1996, Paul Gortmaker. * Released under the GNU General Public License, version 2, * included herein by reference. */ #include stdio.h #include linux/rtc.h #include sys/ioctl.h #include sys/time.h #include sys/types.h #include fcntl.h #include unistd.h #include stdlib.h #include errno.h /* * This expects the new RTC class driver framework, working with * clocks that will often not be clones of what the PC-AT had. * Use the command line to specify another RTC if you need one. */ static const char default_rtc[] = /dev/rtc1; int main(int argc, char **argv) { int i, fd, retval; struct rtc_time rtc_tm; struct rtc_time rtc_wr = { .tm_mday=22, .tm_mon =2, .tm_year =112, .tm_hour=3, .tm_min=55, .tm_sec=50, }; const char *rtc = default_rtc; switch (argc) { case 2: rtc = argv[1]; /* FALLTHROUGH */ case 1: break; default: fprintf(stderr, usage: rtctest [rtcdev]\n); return 1; } fd = open(rtc, O_RDWR); if (fd == -1) { perror(rtc); exit(errno); } fprintf(stderr, \n\t\t\tRTC Driver Test Example.\n\n); // Write the RTC time/date retval = ioctl(fd, RTC_SET_TIME, rtc_wr); if (retval == -1) { perror(RTC_SET_TIME ioctl);