UART and data receive problem (STM32F401RE-Nucleo DemoExample)

[moertl]

Posted on October 22, 2015 at 07:08

Hello

I try the demo project to learn UART initialisation and usingSTM32Cube_FW_F4_V1.9.0\Projects\STM32F401RE-Nucleo\Examples\UART\UART_Printf\EWARMoutgoing Communication is fine. Demo is working.RxD and TxD are connected to the Pins RXD0 and TXD1Now i want to receive datas, so i chanced to:

  /* Infinite loop */

  uint8_t pBuf;  while (1)  {    while (HAL_UART_Receive(&UartHandle, &pBuf,1,1)!= HAL_OK)    {    }      printf(''\n\r UART Byte received UART\n\r'');  }I never received data? Have anybody a hint?Seconday Problem:If i ad a HAL_Delay() the code freezed there 

[File:stm32f4xx_hal.c]

__weak void HAL_Delay(__IO uint32_t Delay)

{  uint32_t tickstart = 0;  tickstart = HAL_GetTick();  while((

HAL_GetTick()

- tickstart) < Delay)  {  }}HAL_GetTicket() allways return 0.What i have to do, that i can use HAL_Delay() in the demo Project?Thank youMartin #stm32f4 #usart

[Tesla DeLorean]

Posted on October 22, 2015 at 15:06

HAL_Delay() is dependent on a functional SysTick, I suspect this would normally get set up in HAL_Init()

For the USART perhaps you need to check that you have an IRQHandler and that it calls back into the HAL for processing.