STM32 MCUs Products

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STM32H743 Battery backed ram issue - ideas wanted

I'm using the 4K of battery backed RAM on the STM32H743 to preserve variables between power cycles. This works fine on 90% of identical systems running identical firmware and with identical H/W, identical chip versions etc. i.e. data is exactly what ...

PMath.4 by Senior III
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  • 5 replies
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STM32H7 SDMMC2 DMA Configuration

I can configure MDMA for SDMMC1 in STM32H730 in STM32CubeIDE.But I do not understand how to enable it for SDMMC2. In the documentation it says SDMMC2 has a direct access to DMA1 & DMA2. But I could not see it in DMA configuration panel.Could you help...

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Resolved! Can't find the X3 crystal recommended by ST from any supplier, nor can I find an equivalent that is in stock from any supplier.

Hi,I have a STMF32446ZE board and require an external crystal that isn't using the STLINK crystal. For x3 ST recommend the following: NX3225GD-8.000MEXS00A-CG04874The specs of this crystal are: Frequency Stability ±50ppm Frequency Tolerance ±20ppm ...

CLH by Associate II
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  • 1 replies
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printf on STM32H747 core M4 doesn't work

printf works on the STM32H747 M7 core once I add the following codeint _write(int file, char *ptr, int len) { int i =0; for ( i = 0 ; i < len; i++) { ITM_SendChar((*ptr++)); } return len; }and enable the "SWV" in the debug...

CHossack by Associate III
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  • 3 replies
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Does HAL_UART_Transmit() sends ASCII or binary?

Hi! Does anyone know if HAL_UART_Transmit() sends ASCII or binary? I've tried to send some data a serial plotter but nothing is being plotted. The format of the data sent follows the setting in STM32CubeMx. (It works on Arduino serial plotter)Serial ...

M7890.1 by Associate III
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  • 10 replies
  • 1 kudos

Resolved! I'm using SPI to communicate with a MIPI chip, the commands to the MIPI are sent as 9 bits but the data sent back is 8 bits.

I'm using SPI to communicate with a MIPI chip, the commands to the MIPI are sent as 9 bits but the data sent back is 8 bits. The 9 bit are set up in a uint16_t variable. Using HAL_SPI_Init the data size is set to 9 bits. When I receive the data using...

WScot.1 by Associate II
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  • 6 replies
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