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STM32G030 triggering DMA error code in UART without DMA configuration

fpalarmini
Associate

Hi everyone,

I have a program with UART communication using interruption and SPI communication using DMA. I realized that when I send a lot of data through SPI, sometimes I get the DMA error code in UART, but I didn't enable DMA in serial. As far as I know UART and SPI are unrelated, so I don't think that the DMA configuration in SPI is affecting UART communication.
Has anyone else experienced similar issues or have some clues?
I am writing in both SPI1 and SPI2 a buffer with 100 bytes every 50 milliseconds using the following function:

HAL_SPI_Transmit_DMA(&hspi1, bufferSPI1, BUFFER_SIZE_SPI1);

Below, I provide the configuration of UART and SPI:

UART configuration:

void HAL_UART_MspInit(UART_HandleTypeDef* huart) { GPIO_InitTypeDef GPIO_InitStruct = {0}; RCC_PeriphCLKInitTypeDef PeriphClkInit = {0}; if(huart->Instance==USART1) { PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1; PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK1; if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) { Error_Handler(); } __HAL_RCC_USART1_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; GPIO_InitStruct.Alternate = GPIO_AF1_USART1; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); /* USART1 interrupt Init */ HAL_NVIC_SetPriority(USART1_IRQn, 0, 0); HAL_NVIC_EnableIRQ(USART1_IRQn); } }

SPI Init:

void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi) { GPIO_InitTypeDef GPIO_InitStruct = {0}; if(hspi->Instance==SPI1) { __HAL_RCC_SPI1_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); GPIO_InitStruct.Pin = GPIO_PIN_1 | GPIO_PIN_2; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; GPIO_InitStruct.Alternate = GPIO_AF0_SPI1; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); hdma_spi1_tx.Instance = DMA1_Channel1; hdma_spi1_tx.Init.Request = DMA_REQUEST_SPI1_TX; hdma_spi1_tx.Init.Direction = DMA_MEMORY_TO_PERIPH; hdma_spi1_tx.Init.PeriphInc = DMA_PINC_DISABLE; hdma_spi1_tx.Init.MemInc = DMA_MINC_ENABLE; hdma_spi1_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; hdma_spi1_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; hdma_spi1_tx.Init.Mode = DMA_NORMAL; hdma_spi1_tx.Init.Priority = DMA_PRIORITY_LOW; if (HAL_DMA_Init(&hdma_spi1_tx) != HAL_OK) { Error_Handler(); } __HAL_LINKDMA(hspi,hdmatx,hdma_spi1_tx); } else if(hspi->Instance==SPI2) { __HAL_RCC_SPI2_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); GPIO_InitStruct.Pin = GPIO_PIN_0; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; GPIO_InitStruct.Alternate = GPIO_AF0_SPI2; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); GPIO_InitStruct.Pin = GPIO_PIN_4; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; GPIO_InitStruct.Alternate = GPIO_AF1_SPI2; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); hdma_spi2_tx.Instance = DMA1_Channel2; hdma_spi2_tx.Init.Request = DMA_REQUEST_SPI2_TX; hdma_spi2_tx.Init.Direction = DMA_MEMORY_TO_PERIPH; hdma_spi2_tx.Init.PeriphInc = DMA_PINC_DISABLE; hdma_spi2_tx.Init.MemInc = DMA_MINC_ENABLE; hdma_spi2_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; hdma_spi2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; hdma_spi2_tx.Init.Mode = DMA_NORMAL; hdma_spi2_tx.Init.Priority = DMA_PRIORITY_LOW; if (HAL_DMA_Init(&hdma_spi2_tx) != HAL_OK) { Error_Handler(); } __HAL_LINKDMA(hspi,hdmatx,hdma_spi2_tx); } }
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I caught the DMA error code in the error callback routine of UART:

void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) { if (huart->Instance == USART1) { if (huart->ErrorCode & HAL_UART_ERROR_DMA) { // BUG: sometimes enters here!! } } }

 

 

2 REPLIES 2
Karl Yamashita
Principal

So, during SPI communication, the UART error callback is called when the UART is transmitting, receiving or both?

Don't worry, I won't byte.
TimerCallback tutorial! | UART and DMA Idle tutorial!

If you find my solution useful, please click the Accept as Solution so others see the solution.

Receiving