diff options
Diffstat (limited to 'stm/main.c')
| -rw-r--r-- | stm/main.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/stm/main.c b/stm/main.c index ffefbb64c..92a1a4c80 100644 --- a/stm/main.c +++ b/stm/main.c @@ -3,6 +3,7 @@ #include <stm32f4xx_rcc.h> #include <stm32f4xx_gpio.h> #include <stm32f4xx_tim.h> +#include <stm32f4xx_rtc.h> #include <stm_misc.h> #include "std.h" @@ -462,6 +463,66 @@ py_obj_t pyb_hid_send_report(py_obj_t arg) { return py_const_none; } +static void rtc_init(void) { + /* Enable the PWR clock */ + RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE); + + /* Allow access to RTC */ + PWR_BackupAccessCmd(ENABLE); + + /* Enable the LSE OSC */ + RCC_LSEConfig(RCC_LSE_ON); + + /* Wait till LSE is ready */ + while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) { + } + + /* Select the RTC Clock Source */ + RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); + /* ck_spre(1Hz) = RTCCLK(LSE) /(uwAsynchPrediv + 1)*(uwSynchPrediv + 1)*/ + uint32_t uwSynchPrediv = 0xFF; + uint32_t uwAsynchPrediv = 0x7F; + + /* Enable the RTC Clock */ + RCC_RTCCLKCmd(ENABLE); + + /* Wait for RTC APB registers synchronisation */ + RTC_WaitForSynchro(); + + /* Configure the RTC data register and RTC prescaler */ + RTC_InitTypeDef RTC_InitStructure; + RTC_InitStructure.RTC_AsynchPrediv = uwAsynchPrediv; + RTC_InitStructure.RTC_SynchPrediv = uwSynchPrediv; + RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24; + RTC_Init(&RTC_InitStructure); + + // Set the date (BCD) + RTC_DateTypeDef RTC_DateStructure; + RTC_DateStructure.RTC_Year = 0x13; + RTC_DateStructure.RTC_Month = RTC_Month_October; + RTC_DateStructure.RTC_Date = 0x26; + RTC_DateStructure.RTC_WeekDay = RTC_Weekday_Saturday; + RTC_SetDate(RTC_Format_BCD, &RTC_DateStructure); + + // Set the time (BCD) + RTC_TimeTypeDef RTC_TimeStructure; + RTC_TimeStructure.RTC_H12 = RTC_H12_AM; + RTC_TimeStructure.RTC_Hours = 0x01; + RTC_TimeStructure.RTC_Minutes = 0x53; + RTC_TimeStructure.RTC_Seconds = 0x00; + RTC_SetTime(RTC_Format_BCD, &RTC_TimeStructure); + + // Indicator for the RTC configuration + //RTC_WriteBackupRegister(RTC_BKP_DR0, 0x32F2); +} + +py_obj_t pyb_rtc_read(void) { + RTC_TimeTypeDef RTC_TimeStructure; + RTC_GetTime(RTC_Format_BIN, &RTC_TimeStructure); + printf("%02d:%02d:%02d\n", RTC_TimeStructure.RTC_Hours, RTC_TimeStructure.RTC_Minutes, RTC_TimeStructure.RTC_Seconds); + return py_const_none; +} + int main(void) { // TODO disable JTAG @@ -489,6 +550,7 @@ int main(void) { // basic sub-system init sys_tick_init(); led_init(); + rtc_init(); // turn on LED to indicate bootup led_state(PYB_LED_G1, 1); @@ -526,6 +588,7 @@ soft_reset: rt_store_attr(m, qstr_from_str_static("servo"), rt_make_function_1(pyb_servo_set)); rt_store_attr(m, qstr_from_str_static("mma"), rt_make_function_0(pyb_mma_read)); rt_store_attr(m, qstr_from_str_static("hid"), rt_make_function_1(pyb_hid_send_report)); + rt_store_attr(m, qstr_from_str_static("time"), rt_make_function_0(pyb_rtc_read)); rt_store_name(qstr_from_str_static("pyb"), m); } |