Solved
STM32F4 Disco RTC (old version) not updating SECONDS
I am using the Audio Playback and record exaample.
I modified Systeem_clock_config as follos
/* Enable HSE Oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSIState = RCC_LSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 336;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}Then ran the RTC config from a Cube generated source
My main is stubbed out to do the following
SystemClock_Config();
/* Initialize MEMS Accelerometer mounted on STM32F4-Discovery board */
if(BSP_ACCELERO_Init() != ACCELERO_OK)
{
/* Initialization Error */
Error_Handler();
}
MemsID = BSP_ACCELERO_ReadID();
// RTC does not initiaalise with the system clock config dictated by this SW.
// By not using the IOC file, it is a pain to debug the clock config errors
// The ARM compiler optimisation also messes with the program flow
MX_RTC_Init();
MX_DMA_Init();
MX_USART2_UART_Init();
HAL_RTC_MspInit(&hrtc);
while (-1) {
RTC_TimeTypeDef ttime;
HAL_RTC_GetTime(&hrtc, &ttime, RTC_HOURFORMAT_24);
char str[50];
sprintf(str,"%5d %5d %5ld %5ld\r\n",ttime.Minutes,ttime.Seconds, ttime.SubSeconds,ttime.SecondFraction);
HAL_UART_Transmit_DMA(&huart2,(uint8_t *) str,strlen(str));
HAL_Delay(990);
}And my output on the serial port looks like this
0 1 108 255
0 1 133 255
0 1 158 255
0 1 183 255
0 1 208 255
0 1 233 255
0 1 3 255
0 1 28 255
0 1 53 255
0 1 78 255
0 1 103 255
0 1 128 255
0 1 153 255
0 1 178 255
0 1 203 255
0 1 229 255
0 1 254 255
0 1 23 255
0 1 48 255
0 1 73 255
0 1 98 255
0 1 122 255As you can see, the seconds and minutes do not update. The seconds either has a 0 or a 1.
Additionally, if I have LSI enabled then I seem to lose systick
Any ideas as to what is going on and how to correct it?
Thanks.
