Problems with data reception via USART3 on STM32F429-Disco board

[Emanuele78]

Original post: https://community.st.com/t5/stm32cubemx-mcus/problems-with-data-reception-via-usart2-on-stm32f429zi/td-p/741765

Even setting USART3 it doesn't work (see attachments). Did I make a mistake setting some parameters, or is something missing? Thanks a lot

[mƎALLEm]

The attachments are not helpful. Normally you need to share your code and attach your ioc file.

Meanwhile, you can use this example already running on STM32F429ZI-Nucleo board:

https://github.com/STMicroelectronics/STM32CubeF4/tree/master/Projects/STM32F429ZI-Nucleo/Examples/UART/UART_Printf

Hope it helps.

[Emanuele78]

Given that I am using the STM32F429ZIT6 DISCOVERY KIT connected to the PC via USB, from the received messages I didn’t understand whether I should use USART3 or USART1. I tried following the instructions, but it doesn’t work.

Ok, the code in main.c is very simple:

/* Infinite loop */
 /* USER CODE BEGIN WHILE */
 while (1)
 {
 if(HAL_GPIO_ReadPin(Pulsante_on_board_GPIO_Port, Pulsante_on_board_Pin))
 {
 stato = !stato;
 HAL_Delay(250);
 }

 HAL_GPIO_WritePin(Led_on_board_LD3_GPIO_Port, Led_on_board_LD3_Pin, stato);

 if(HAL_UART_Transmit(&huart3, (const uint8_t *)"TEST ", 6, 100) !=HAL_OK)
		 Error_Handler();
 HAL_Delay(500);
 /* USER CODE END WHILE */

 /* USER CODE BEGIN 3 */
 }

 

[mƎALLEm]

Please refer to the thread I provided to you (there is an example of printf attached): https://community.st.com/t5/stm32-mcus-embedded-software/how-to-use-printf/m-p/736985#M56462

F429-DISCO is using USART1 connected to VCP:

From the user manual of the board:

From F429-DISCO schematics:

Hope it helps.

 

[Andrew Neil]

See the Posting Tips for how to properly post source code:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/ta-p/575228

[mƎALLEm]

I noticed you are using F429 disco board that it is using USART1.

See the example I attached in this thread.

As stated by @Andrew Neil you need to share the code + provide which HW you are using, ST board? Custom board? this prevents us to provide you wrong answers.

 

[mƎALLEm]

Hello @Emanuele78 , did you mistakenly accept the wrong comment as solution ?

[Emanuele78]

Yes, sorry..

[Andrew Neil]

Instructions to undo that:

https://community.st.com/t5/community-guidelines/help-others-to-solve-their-issues/ta-p/575256#:~:text=If%20you%20accidentally%20chose%20the%20wrong%20post%20as%20solution%2C%20you%20can%20always%20revert%20this%20action%20by%20clicking%20%22Not%20the%20Solution%22

 

[waclawek.jan]

Is this a new board?

Because older revisions (B01) of it did not have the VCP capability.

Revision should be displayed on a sticker on the bottom of the board.

JW

[Andrew Neil]

---

@waclawek.jan wrote:

older revisions (B01) of it did not have the VCP capability.

---

I guess that's why it's not shown on the block diagram - it was just copied without being updated?