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Simplify Ameba RTC driver 

The Ameba RTC driver converts time_t to
second/minute/hour/day/month/year in rtc_write and back to time_t in
rtc_read. Replace this with an implementation which uses time_t
directly.
pull/4499/head
Russ Butler 2017-06-07 22:01:54 -05:00
parent 744b95cc9f
commit 96288e3eef
1 changed files with 5 additions and 62 deletions
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67
targets/TARGET_Realtek/TARGET_AMEBA/rtc_api.c
View File

@ -19,54 +19,17 @@
#if DEVICE_RTC
#include <time.h>
#include "timer_api.h" // software-RTC: use a g-timer for the tick of the RTC
#include "mbed_mktime.h"
#define SW_RTC_TIMER_ID TIMER4
static gtimer_t sw_rtc;
static struct tm rtc_timeinfo;
static int sw_rtc_en=0;
static const u8 dim[14] = {
31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 31, 28 };
static inline bool is_leap_year(unsigned int year)
{
return (!(year % 4) && (year % 100)) || !(year % 400);
}
static u8 days_in_month (u8 month, u8 year)
{
u8 ret = dim [ month - 1 ];
if (ret == 0)
ret = is_leap_year (year) ? 29 : 28;
return ret;
}
static time_t rtc_time;
void sw_rtc_tick_handler(uint32_t id)
{
if(++rtc_timeinfo.tm_sec > 59) { // Increment seconds, check for overflow
rtc_timeinfo.tm_sec = 0; // Reset seconds
if(++rtc_timeinfo.tm_min > 59) { // Increment minutes, check for overflow
rtc_timeinfo.tm_min = 0; // Reset minutes
if(++rtc_timeinfo.tm_hour > 23) { // Increment hours, check for overflow
rtc_timeinfo.tm_hour = 0; // Reset hours
++rtc_timeinfo.tm_yday; // Increment day of year
if(++rtc_timeinfo.tm_wday > 6) // Increment day of week, check for overflow
rtc_timeinfo.tm_wday = 0; // Reset day of week
// Increment day of month, check for overflow
if(++rtc_timeinfo.tm_mday >
days_in_month(rtc_timeinfo.tm_mon, rtc_timeinfo.tm_year + 1900)) {
rtc_timeinfo.tm_mday = 1; // Reset day of month
if(++rtc_timeinfo.tm_mon > 11) { // Increment month, check for overflow
rtc_timeinfo.tm_mon = 0; // Reset month
rtc_timeinfo.tm_yday = 0; // Reset day of year
++rtc_timeinfo.tm_year; // Increment year
} // - year
} // - month
} // - day
} // - hour
}
rtc_time++;
}
void rtc_init(void)
@ -92,35 +55,15 @@ int rtc_isenabled(void)
time_t rtc_read(void)
{
time_t t;
// Convert to timestamp
t = mktime(&rtc_timeinfo);
return t;
return rtc_time;
}
void rtc_write(time_t t)
{
// Convert the time in to a tm
struct tm *timeinfo = localtime(&t);
if (timeinfo == NULL) {
// Error
return;
}
gtimer_stop(&sw_rtc);
// Set the RTC
rtc_timeinfo.tm_sec = timeinfo->tm_sec;
rtc_timeinfo.tm_min = timeinfo->tm_min;
rtc_timeinfo.tm_hour = timeinfo->tm_hour;
rtc_timeinfo.tm_mday = timeinfo->tm_mday;
rtc_timeinfo.tm_wday = timeinfo->tm_wday;
rtc_timeinfo.tm_yday = timeinfo->tm_yday;
rtc_timeinfo.tm_mon = timeinfo->tm_mon;
rtc_timeinfo.tm_year = timeinfo->tm_year;
rtc_time = t;
gtimer_start(&sw_rtc);
}