mirror of
https://github.com/Valeh2012/PersonalVotingMachine
synced 2024-11-29 12:20:59 +02:00
78 lines
1.4 KiB
C
78 lines
1.4 KiB
C
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/*
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rtc.c
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PA0 TAMP2 Button
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PA2 TAMP3 Button
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*/
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#include <string.h>
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#include "stm32l031xx.h"
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#include "delay.h"
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#include "u8g2.h"
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#include "rtc.h"
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/* read RTC register into bcd array */
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void rtc_register_to_bcd(rtc_t *rtc)
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{
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uint32_t r;
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int i;
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r = RTC->TR;
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i = 0;
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do
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{
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rtc->bcd[i] = r & 15;
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r >>= 4;
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i++;
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} while( i < 6 );
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rtc->bcd[1] &= 7; /* seconds */
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rtc->bcd[3] &= 7; /* minutes */
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rtc->bcd[5] &= 3; /* hours */
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r = RTC->DR;
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i = 6;
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do
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{
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rtc->bcd[i] = r & 15;
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r >>= 4;
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i++;
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} while( i < 12 );
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rtc->bcd[7] &= 3; /* days */
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rtc->bcd[9] &= 1; /* months */
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}
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static uint8_t rtc_bcd_to_uint8(rtc_t *rtc, int idx) U8G2_NOINLINE;
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static uint8_t rtc_bcd_to_uint8(rtc_t *rtc, int idx)
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{
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return rtc->bcd[idx+1]*10 + rtc->bcd[idx];
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}
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/* convert the content of the bcd array to the ymd&hms vars */
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void rtc_bcd_to_ymd_hms(rtc_t *rtc)
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{
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rtc->sec = rtc_bcd_to_uint8(rtc, 0);
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rtc->min = rtc_bcd_to_uint8(rtc, 2);
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rtc->hour = rtc_bcd_to_uint8(rtc, 4);
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rtc->day = rtc_bcd_to_uint8(rtc, 6);
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rtc->month = rtc_bcd_to_uint8(rtc, 8);
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rtc->year = rtc_bcd_to_uint8(rtc, 10);
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}
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void rtc_draw_time(rtc_t *rtc, u8g2_t *u8g2)
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{
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char s[10];
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strcpy(s, u8x8_u8toa(rtc->hour, 2));
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strcat(s, ":");
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strcat(s, u8x8_u8toa(rtc->min, 2));
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strcat(s, ":");
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strcat(s, u8x8_u8toa(rtc->sec, 2));
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u8g2_SetFont(u8g2, u8g2_font_helvB18_tn);
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u8g2_DrawStr(u8g2, 0,23, s);
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}
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