application: RTC + date/time added
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e255573b1e
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cc8be1f278
152
application.c
152
application.c
@ -94,39 +94,114 @@ static void command_uptime(void* argument)
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static void command_datetime(void* argument)
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{
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char* datetime = (char*)argument; // argument is optional date time
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if (NULL == argument) { // no date and time provided, just show the current day and time
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// TODO wait until date/time is synchronised
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const char* days[] = { "??", "Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"}; // the days of the week
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// set date
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if (datetime) { // date has been provided
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// parse date
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const char* malformed = "date and time malformed, expecting YYYY-MM-DD WD HH:MM:SS\n";
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if (strlen(datetime) != (4 + 1 + 2 + 1 + 2) + 1 + 2 + 1 + (2 + 1 + 2 + 1 + 2)) { // verify date/time is long enough
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printf(malformed);
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return;
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}
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if (!(isdigit((int8_t)datetime[0]) && isdigit((int8_t)datetime[1]) && isdigit((int8_t)datetime[2]) && isdigit((int8_t)datetime[3]) && \
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'-' == datetime[4] && \
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isdigit((int8_t)datetime[5]) && isdigit((int8_t)datetime[6]) && \
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'-' == datetime[7] && \
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isdigit((int8_t)datetime[8]) && isdigit((int8_t)datetime[9]) && \
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' ' == datetime[10] && \
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isalpha((int8_t)datetime[11]) && isalpha((int8_t)datetime[12]) && \
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' ' == datetime[13] && \
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isdigit((int8_t)datetime[14]) && isdigit((int8_t)datetime[15]) && \
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':' == datetime[16] && \
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isdigit((int8_t)datetime[17]) && isdigit((int8_t)datetime[18]) && \
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':' == datetime[19] && \
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isdigit((int8_t)datetime[20]) && isdigit((int8_t)datetime[21]))) { // verify format (good enough to not fail parsing)
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printf(malformed);
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return;
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}
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const uint16_t year = strtol(&datetime[0], NULL, 10); // parse year
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if (year <= 2000 || year > 2099) {
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puts("year out of range\n");
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return;
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}
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const uint8_t month = strtol(&datetime[5], NULL, 10); // parse month
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if (month < 1 || month > 12) {
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puts("month out of range\n");
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return;
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}
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const uint8_t day = strtol(&datetime[8], NULL, 10); // parse day
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if (day < 1 || day > 31) {
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puts("day out of range\n");
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return;
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}
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const uint8_t hour = strtol(&datetime[14], NULL, 10); // parse hour
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if (hour > 24) {
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puts("hour out of range\n");
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return;
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}
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const uint8_t minute = strtol(&datetime[17], NULL, 10); // parse minutes
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if (minute > 59) {
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puts("minute out of range\n");
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return;
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}
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const uint8_t second = strtol(&datetime[30], NULL, 10); // parse seconds
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if (second > 59) {
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puts("second out of range\n");
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return;
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}
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uint8_t week_day = 0;
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for (uint8_t i = 1; i < LENGTH(days) && 0 == week_day; i++) {
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if (days[i][0] == toupper(datetime[11]) && days[i][1] == tolower(datetime[12])) {
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week_day = i;
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break;
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}
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}
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if (0 == week_day) {
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puts("unknown week day\n");
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return;
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}
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uint32_t date = 0; // to build the date
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date |= (((year - 2000) / 10) & RTC_DR_YT_MASK) << RTC_DR_YT_SHIFT; // set year tenth
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date |= (((year - 2000) % 10) & RTC_DR_YU_MASK) << RTC_DR_YU_SHIFT; // set year unit
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date |= ((month / 10) & RTC_DR_MT_MASK) << RTC_DR_MT_SHIFT; // set month tenth
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date |= ((month % 10) & RTC_DR_MU_MASK) << RTC_DR_MU_SHIFT; // set month unit
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date |= ((day / 10) & RTC_DR_DT_MASK) << RTC_DR_DT_SHIFT; // set day tenth
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date |= ((day % 10) & RTC_DR_DU_MASK) << RTC_DR_DU_SHIFT; // set day unit
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date |= (week_day & RTC_DR_WDU_MASK) << RTC_DR_WDU_SHIFT; // time day of the week
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uint32_t time = 0; // to build the time
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time = 0; // reset time
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time |= ((hour / 10) & RTC_TR_HT_MASK) << RTC_TR_HT_SHIFT; // set hour tenth
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time |= ((hour % 10) & RTC_TR_HU_MASK) << RTC_TR_HU_SHIFT; // set hour unit
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time |= ((minute / 10) & RTC_TR_MNT_MASK) << RTC_TR_MNT_SHIFT; // set minute tenth
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time |= ((minute % 10) & RTC_TR_MNU_MASK) << RTC_TR_MNU_SHIFT; // set minute unit
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time |= ((second / 10) & RTC_TR_ST_MASK) << RTC_TR_ST_SHIFT; // set second tenth
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time |= ((second % 10) & RTC_TR_SU_MASK) << RTC_TR_SU_SHIFT; // set second unit
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// write date
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pwr_disable_backup_domain_write_protect(); // disable backup protection so we can set the RTC clock source
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rtc_unlock(); // enable writing RTC registers
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RTC_ISR |= RTC_ISR_INIT; // enter initialisation mode
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while (!(RTC_ISR & RTC_ISR_INITF)); // wait to enter initialisation mode
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RTC_DR = date; // set date
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RTC_TR = time; // set time
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RTC_ISR &= ~RTC_ISR_INIT; // exit initialisation mode
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rtc_lock(); // protect RTC register against writing
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pwr_enable_backup_domain_write_protect(); // re-enable protection now that we configured the RTC clock
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}
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// show date
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if (!(RTC_ISR & RTC_ISR_INITS)) { // date has not been set yet
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puts("date/time not initialized\n");
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} else {
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rtc_wait_for_synchro(); // wait until date/time is synchronised
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const uint8_t year = ((RTC_DR >> RTC_DR_YT_SHIFT) & RTC_DR_YT_MASK) * 10 + ((RTC_DR >> RTC_DR_YU_SHIFT) & RTC_DR_YU_MASK); // get year
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const uint8_t month = ((RTC_DR >> RTC_DR_MT_SHIFT) & RTC_DR_MT_MASK) * 10 + ((RTC_DR >> RTC_DR_MU_SHIFT) & RTC_DR_MU_MASK); // get month
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const uint8_t day = ((RTC_DR >> RTC_DR_DT_SHIFT) & RTC_DR_DT_MASK) * 10 + ((RTC_DR >> RTC_DR_DU_SHIFT) & RTC_DR_DU_MASK); // get day
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const uint8_t week_day = ((RTC_DR >> RTC_DR_WDU_SHIFT) & RTC_DR_WDU_MASK); // get week day
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const char* days[] = { "??", "Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"}; // the days of the week
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const uint8_t hour = ((RTC_TR >> RTC_TR_HT_SHIFT) * RTC_TR_HT_MASK) * 10 + ((RTC_TR >> RTC_TR_HU_SHIFT) & RTC_TR_HU_MASK); // get hours
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const uint8_t hour = ((RTC_TR >> RTC_TR_HT_SHIFT) & RTC_TR_HT_MASK) * 10 + ((RTC_TR >> RTC_TR_HU_SHIFT) & RTC_TR_HU_MASK); // get hours
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const uint8_t minute = ((RTC_TR >> RTC_TR_MNT_SHIFT) & RTC_TR_MNT_MASK) * 10 + ((RTC_TR >> RTC_TR_MNU_SHIFT) & RTC_TR_MNU_MASK); // get minutes
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const uint8_t second = ((RTC_TR >> RTC_TR_ST_SHIFT) & RTC_TR_ST_MASK) * 10 + ((RTC_TR >> RTC_TR_SU_SHIFT) & RTC_TR_SU_MASK); // get seconds
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printf("date: %s 20%02d-%02d-%02d %02d:%02d:%02d\n", days[week_day], year, month, day, hour, minute, second);
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} else { // date and time provided, set it
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const char* malformed = "date and time malformed, expecting YYYY-MM-DD HH:MM:SS\n";
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if (strlen(datetime) != (4 + 1 + 2 + 1 + 2) + 1 + (2 + 1 + 2 + 1 + 2)) { // verify date/time is long enough
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printf(malformed);
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return;
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}
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if (!(isdigit((int8_t)datetime[0]) && isdigit((int8_t)datetime[1]) && isdigit((int8_t)datetime[2]) && isdigit((int8_t)datetime[3]) && '-' == datetime[4] && isdigit((int8_t)datetime[5]) && isdigit((int8_t)datetime[6]) && '-' == datetime[7] && isdigit((int8_t)datetime[8]) && isdigit((int8_t)datetime[9]) && ' ' == datetime[10] && isdigit((int8_t)datetime[11]) && isdigit((int8_t)datetime[12]) && ':' == datetime[13] && isdigit((int8_t)datetime[14]) && isdigit((int8_t)datetime[15]) && ':' == datetime[16] && isdigit((int8_t)datetime[17]) && isdigit((int8_t)datetime[18]))) { // verify format (good enough to not fail parsing)
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printf(malformed);
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return;
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}
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/*
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time_tm.tm_year = strtol(&datetime[0], NULL, 10) - 1900; // parse year
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time_tm.tm_mon = strtol(&datetime[5], NULL, 10) - 1; // parse month
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time_tm.tm_mday = strtol(&datetime[8], NULL, 10); // parse day
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time_tm.tm_hour = strtol(&datetime[11], NULL, 10); // parse hour
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time_tm.tm_min = strtol(&datetime[14], NULL, 10); // parse minutes
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time_tm.tm_sec = strtol(&datetime[17], NULL, 10); // parse seconds
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time_t time_rtc = mktime(&time_tm); // get back seconds
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time_rtc -= rtc_offset; // remove start offset
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time_start = time_rtc * RTC_TICKS_SECOND + (rtc_get_counter_val() - time_start); // update uptime with current date
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rtc_set_counter_val(time_rtc * RTC_TICKS_SECOND); // save date/time to internal RTC
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*/
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printf("date: 20%02d-%02d-%02d %s %02d:%02d:%02d\n", year, month, day, days[week_day], hour, minute, second);
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}
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}
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@ -310,6 +385,29 @@ void main(void)
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}
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#endif
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// setup RTC
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puts("setup RTC: ");
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rcc_periph_clock_enable(RCC_RTC); // enable clock for RTC peripheral
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if (!(RCC_BDCR && RCC_BDCR_RTCEN)) { // the RTC has not been configured yet
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pwr_disable_backup_domain_write_protect(); // disable backup protection so we can set the RTC clock source
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rtc_unlock(); // enable writing RTC registers
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#if defined(MINIF401)
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rcc_osc_on(RCC_LSE); // enable LSE clock
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while (!rcc_is_osc_ready(RCC_LSE)); // wait until clock is ready
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rtc_set_prescaler(256, 128); // set clock prescaler to 32768
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RCC_BDCR = (RCC_BDCR & ~(RCC_BDCR_RTCSEL_MASK << RCC_BDCR_RTCSEL_SHIFT)) | (RCC_BDCR_RTCSEL_LSE << RCC_BDCR_RTCSEL_SHIFT); // select LSE as RTC clock source
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#else
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rcc_osc_on(RCC_LSI); // enable LSI clock
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while (!rcc_is_osc_ready(RCC_LSI)); // wait until clock is ready
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rtc_set_prescaler(250, 128); // set clock prescaler to 32000
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RCC_BDCR = (RCC_BDCR & ~(RCC_BDCR_RTCSEL_MASK << RCC_BDCR_RTCSEL_SHIFT)) | (RCC_BDCR_RTCSEL_LSI << RCC_BDCR_RTCSEL_SHIFT); // select LSI as RTC clock source
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#endif
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RCC_BDCR |= RCC_BDCR_RTCEN; // enable RTC
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rtc_lock(); // protect RTC register against writing
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pwr_enable_backup_domain_write_protect(); // re-enable protection now that we configured the RTC clock
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}
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puts("OK\n");
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// setup terminal
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terminal_prefix = ""; // set default prefix
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terminal_process = &process_command; // set central function to process commands
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