STM32F407 Hang in GPIO A 15 Init

Pedram · ‎2017-11-30

Posted on November 30, 2017 at 20:36

Hello friends

The microcontroller will hang after the following command

How can I fix this problem?

GPIO_InitStruct.Pin = GPIO_PIN_15;

GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); < hang here

Thanks

waclawek.jan · ‎2017-11-30

Posted on November 30, 2017 at 20:46

By 'hang', do you mean 'it stops responding to my debugger, which uses JTAG for its connection'?

If yes, then use SWD rather than JTAG, that would free up PA15.

If no, check if there's any unexpected short between PA15 and any other surrounding trace.

JW