About AlexCaron

AlexCaron · 2024-11-06

Hi, I'm using a STM32H7S78-DK board along with stm32cudeide 1.16.0. I'm loading the example LTDC_ColorKeyring which work fine, here is the issue... I'm trying to implement uart4 connected to the onboard ST-link. If I init MX_UART4_Init() and use HAL_...

AlexCaron · 2024-11-07

The same goes for SPI. I set the CLK to 2Mhz, this is what I get if LTDC is NOT init. Exactly 2Mhz.Now when LTDC is init. 1.778Mhz, which is also a loss of about 12% like the Uart. It seems the LTDC slow down the whole clock domain...The same happen ...

AlexCaron · 2024-11-07

So I probed PD1 pin, the fisrt capture show the uart BEFORE LTDC, the second one is after LTDC, it look the same, but the timings are off. Every HIGH-LOW transition are little bit slower. So the baudrate after LTDC is 12% slower. The original baudrat...

AlexCaron · 2024-11-07

LTDC is working, there is images on the LCD, and the UART is also working when LTDC is not initializated yet. UART_4_tx is on PD1, I don't see this pin is the LTDC configuration, except if there is an error in the schematic and this pin is shared wit...

AlexCaron · 2024-11-07

Hi Imen,Thank you for your reply, as I said, they both work unless the ltdc is started so I assume both clock/configuration are fine. Starting the ltdc completely stop the uart4 to work. Anyway the project is comming from one of your example, maybe y...

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STM32H7S, LTCD and uart won't work together

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Re: STM32H7S, LTCD and uart won't work together