STM32 MPUs Embedded software and solutions

DMA2 RX stream5 CM4 not working

Hello , I am trying to configure RX (only) with dma. I am using DMA2 stream5 on usart3 I have connected USB to UART bridge (4 wire) on 40 pin headers RX,TX,VDD(3) and GND on CN7. Whenever I am trying to send any data from the comport (teraterm ) fro...

Which DMA channel should I use to read from FPGA/memory (FMC)

Hi,I am puzzled which DMA channel to use to read from an FPGA connected to the FMC.Using the dmatest module I found out which are free and can be used for DMA_MEMCPYtransfers:modprobe dmatest timeout=2000 iterations=1 run=1 wait=1 [ 991.821537] dma...

stm32mp1 SAI DMA issue

Hi,We are using stm32mp157a in our custom board.We are configured SAI for Cortex M in cubemx.But we are unable to get dma interrupt and data through DMA. you can see my code flow below.In main.we are calling below functions.int main(){ MX_DMA_Ini...

HAL_SPI_TransmitReceive_DMA() is not showing any data transmissiom or reception.(slave: Arduino nano as dummy sensor and stm32mp157C as master )

hello,I'm a new member here so if i am uploading this question in a wrong way please notify me.i am working at the moment with octavo board OSD32MP15x that integrates the STM32MP15x dual core Arm cortex A7 and an arm cortex m4.i am trying to run a si...

Resolved! STM32MP1 DMA buffer not populating with ADC values.

/* USER CODE BEGIN PD */ #define ADC_BUF_LEN 4096 /* USER CODE END PD */ ... /* USER CODE BEGIN PV */ uint16_t adc_buf[ADC_BUF_LEN]; ... /* USER CODE BEGIN 2 */ HAL_ADC_Start_DMA(&hadc2, (uint32_t*)adc_buf, ADC_BUF_LEN);I've got the above code ...

Resolved! Using ADC with DMA on M4 causes DMA transfer error

We are trying to use circular DMA to transfer data from ADC1 into a buffer in MCU SRAM using CubeMX-generated code to configure the ADC and DMA. The DMA stream encounters a transfer error on transferring the first item. I have tried clearing the DMA ...

Resolved! DMA2 breaks SPI3 communication when performing under Linux context.

Hello,we are working on the ST32MP1. The SPI3 works fine with the CubeMX software combining the DMA2 and FIFO when the board works in engineering mode. But if I perform the same software loaded by Linux (rproc start), the DMA2 SPI stream stops worki...

Resolved! DMA for USART

Hi all,I am trying assign DMA to USART3 channel on STM32MP1.I assigned it appropriately in the CubeMX but it looks like it was not able to auto-generate any code regarding the DMA assignment to the USART3.The device-tree bindings look pretty confusi...

STM32MP151 Transmit DMA stopping unexpectedly

I am using UART5 on an STM32MP151 to communicate with an external processor. The Cortex-A7 is running Linux and DMA is in use for both receive and transmit. Hardware flow control is also enabled and the transfer rate is 6 Mbps. Currently we are runni...

Does Linuxdrivers use the DMAMUX module in STM32MP1 ?

Hi,we are currently evaluate the STM32MP for a project and we want to ensure that we can handle all errataissues that concern our usage scenario.In Errata are the points: 2.6.1 to 2.6.4 that discribe DMAMUX issues. At this point my question is:Does L...