116 lines
2.6 KiB
C
116 lines
2.6 KiB
C
#include <rtthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include "libc.h"
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struct timeval _timevalue;
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static void libc_system_time_init()
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{
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time_t time;
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rt_tick_t tick;
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rt_device_t device;
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time = 0;
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device = rt_device_find("rtc");
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if (device != RT_NULL)
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{
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/* get realtime seconds */
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rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time);
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}
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/* get tick */
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tick = rt_tick_get();
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_timevalue.tv_usec = MICROSECOND_PER_SECOND - (tick%RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
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_timevalue.tv_sec = time - tick/RT_TICK_PER_SECOND - 1;
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}
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int libc_get_time(struct timespec *time)
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{
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rt_tick_t tick;
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RT_ASSERT(time != RT_NULL);
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/* get tick */
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tick = rt_tick_get();
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time->tv_sec = _timevalue.tv_sec + tick / RT_TICK_PER_SECOND;
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time->tv_nsec = (_timevalue.tv_usec + (tick % RT_TICK_PER_SECOND) * NANOSECOND_PER_TICK) * 1000;
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return 0;
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}
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int libc_set_time(const struct timespec *time)
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{
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int second;
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rt_tick_t tick;
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rt_device_t device;
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second = time->tv_sec;
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device = rt_device_find("rtc");
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if (device != RT_NULL)
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{
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/* get realtime seconds */
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rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_TIME, &second);
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}
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else return -1;
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/* get tick */
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tick = rt_tick_get();
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/* update timevalue */
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_timevalue.tv_usec = MICROSECOND_PER_SECOND - (tick % RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
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_timevalue.tv_sec = second - tick/RT_TICK_PER_SECOND - 1;
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return 0;
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}
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int libc_time_to_tick(const struct timespec *time)
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{
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int tick;
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int microsecond, second;
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RT_ASSERT(time != RT_NULL);
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tick = RT_WAITING_FOREVER;
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if (time != NULL)
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{
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if ((time->tv_nsec/1000 - _timevalue.tv_usec) < 0)
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{
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microsecond = (1000000UL + time->tv_nsec/1000) - _timevalue.tv_usec;
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second = time->tv_sec - 1;
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}
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else
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{
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microsecond = time->tv_nsec/1000 - _timevalue.tv_usec;
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second = time->tv_sec;
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}
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tick = second * RT_TICK_PER_SECOND + microsecond * RT_TICK_PER_SECOND / MICROSECOND_PER_SECOND;
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if (tick < 0) tick = 0;
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}
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return tick;
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}
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void libc_system_init(const char* tty_name)
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{
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int fd;
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/* init console device */
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rt_console_init(tty_name);
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/* open console as stdin/stdout/stderr */
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fd = open("/dev/console", O_RDONLY, 0); /* for stdin */
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fd = open("/dev/console", O_WRONLY, 0); /* for stdout */
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fd = open("/dev/console", O_WRONLY, 0); /* for stderr */
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/* set PATH and HOME */
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putenv("PATH=/");
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putenv("HOME=/");
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/* initialize system time */
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libc_system_time_init();
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}
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