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Associate III
October 5, 2024
Solved

How can I use a serial port on the arduino connectors?

  • October 5, 2024
  • 1 reply
  • 1755 views

I have a stm32H745I-Disco and I would like to use some UART and I would need it to be through one of the pins that the board has called arduino connectors.

I was able to use the USART1 without problem but now I want to use it together with the display and I realize that the pins PB6 and PB7 are being used by vsync_freq and render_time.

What can I do?

 

The schematic is : https://www.st.com/resource/en/schematic_pack/mb1381-h750xb-b01-schematic.pdf

Best answer by Tesla DeLorean

Show me this on the MB1381-B schematic for the H745I / H750I DISCO board..

Not associated with SCREEN/DISPLAY, only DCMI

LCD_VSYNC is PI9

Are you sure you're using the right board template?

h75x_pbx_af.jpg

@STTwo-32 This schematic is unhelpful, the ARD_D0/ARD_D1 connect to PB7 / PB6 USART1 / LPUART1

mb1381_arduino_issue.jpg

mb1381_ard_d0_d1.jpg

1 reply

Tesla DeLorean
Guru
October 5, 2024

Doesn't PB6/PB7 clash with the CAMERA (DCMI) not the DISPLAY

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Associate III
October 6, 2024

Hello Tesla DeLorean

STM32Cubeide indicates the following:

Maximiliano_1-1728173391668.png

 

Maximiliano_0-1728173386331.png

and if I am not mistaken in PB6 named B5 in the schematic it says that it is connected to a pin of the LCD.

 

Tesla DeLorean
Tesla DeLoreanBest answer
Guru
October 6, 2024

Show me this on the MB1381-B schematic for the H745I / H750I DISCO board..

Not associated with SCREEN/DISPLAY, only DCMI

LCD_VSYNC is PI9

Are you sure you're using the right board template?

h75x_pbx_af.jpg

@STTwo-32 This schematic is unhelpful, the ARD_D0/ARD_D1 connect to PB7 / PB6 USART1 / LPUART1

mb1381_arduino_issue.jpg

mb1381_ard_d0_d1.jpg

Tips, Buy me a coffee, or three.. PayPal VenmoUp vote any posts that you find helpful, it shows what's working..