Failure when Configuring UART2 in the STM32C031C6

[tpeng.1]

When configuring UART2 in the STM32C0316-DK, the emulator is locked.

Error in executing 'step' command ... 

Target is not responding, retrying...

Code is running here (stm32c0xx_hal_msp.c line 272):

  /**USART2 GPIO Configuration

  PA8   ------> USART2_TX

  PA13   ------> USART2_RX

  */

  GPIO_InitStruct.Pin = GPIO_PIN_8;

  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

  GPIO_InitStruct.Alternate = GPIO_AF1_USART2;

  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  GPIO_InitStruct.Pin = GPIO_PIN_13;

  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

  GPIO_InitStruct.Alternate = GPIO_AF4_USART2;

  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

Need you help.

Tim

[Jaroslav JANOS · Accepted solution]

Hello @tpeng.1​ ,

this is quite common mistake, you reconfigured one of your pins used for debug (PA13). You should use other pins for the USART2, when you want to use SWD.

BR,

Jaroslav

[tpeng.1]

Hi Jaroslav,
Thank you very much for your quick response!
Now I understand that PA13 is used for debug.
Br,
Tim