STM32CubeIDE
Version: 1.1.0
Build: 4551_20191014-1140 (UTC)
File > New STM32 Project
Select for example NUCLEO-F042K6 board, leave default settings (STM32Cube_FW_F0 V1.11.0). But the bug exists for other boards/MCUs like STM32F432 too.
Initialize all peripherals with their default value? Yes.
Connectivity USART2:
add USART2_RX DMA
add USART2_TX DMA
NVIC: enable USART2 global interrupt
Save all, look at generated code, main.c:
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART2_UART_Init();
MX_DMA_Init();
/* USER CODE BEGIN 2 */
MX_USART2_UART_Init() does not init properly because DMA block has no clock yet.
As a consequence, HAL_UART_Transmit_DMA( &huart2, "!", 1 ); does not output anything
Workaround: manually swap init code:
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_DMA_Init();
MX_USART2_UART_Init();
/* USER CODE BEGIN 2 */
or call MX_DMA_Init(); in a user code section upfront to avoid overwriting on code re-generation.
hth
KnarfB
