STM32H743I-EVAL2 not working with IAP_Main serial from H7 Cube examples.

[STM32 User]

I am having trouble getting the Serial IAP to work with the STM32H743I-EVAL2 board.

It loads and compiles fine and seems to get into the correct serial string transmit loop when pushing the tamper button on start up. But I can not get any serial communication to send. I have placed a scope on the output pin and there is no serial sending. I can see serial on the RX when sent from my computer.

I have made a test project use STMcube turning on just the serial pins and sending an array of bytes out using HAL_UART_Transmit ( &huart1, data, 10, 1000); and this works.

Is this compatible with the EVAL2 board? Do I need to change anything?

https://github.com/STMicroelectronics/STM32CubeH7/tree/master/Projects/STM32H743I-EVAL/Applications/IAP/IAP_Main

[Tesla DeLorean]

Isn't there a switch or jumper on this board mapping the UART between the RS232 and ST-LINK VCP ?

[Pavel A.]

Two jumpers. JP7 for TX and JP8 for RX.

[STM32 User]

I am able to get serial out using a different code but when I use the provided example it.

Does ST-LINK VCP connect it to the flash in some way?

[Tesla DeLorean]

Don't recall. Application Note AN2606 describes the pin(s) used by the ROM based System Loader that implements the "ISP" type programming of a blank device.

The IAP example uses USART1 PB14/PB15 (same on EVAL, and EVAL2)

[avulas76]

Are we able to get a resolution on this issue, I am using the  STM32H743I-EVAL2, and by using the IAP_Main, not getting the USART1 menu information in a serial monitor on pressing "Tamper".

Where a simple UART_Printf application is able to get data through the serial port. This tells me the serial port jumpers and board to my PC connection and serial monitor programs working fine.