本帖最后由 HomeKit 于 2025-10-2 19:12 编辑
我使用以下代码进行内存位置跳转：
JumpAddress = *(__IO uint32_t*) (APPLICATION_ADDRESS + 4);
Jump_To_Application = (pFunction) JumpAddress;
__set_MSP(*(__IO uint32_t*) (APPLICATION_ADDRESS));
Jump_To_Application();
我成功实现了仅使用一个GPIO时的跳转功能，但在引导程序中添加外设后，跳转就不再有效。
参考了某个UART的参考实现（stm32f4xx_hal_uart.c）：
HAL_StatusTypeDef HAL_UART_DeInit(UART_HandleTypeDef *huart)
{
/* Check the UART handle allocation */
if (huart == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_UART_INSTANCE(huart->Instance));
huart->gState = HAL_UART_STATE_BUSY;
/* Disable the Peripheral */
__HAL_UART_DISABLE(huart);
#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
if (huart->MspDeInitCallback == NULL)
{
huart->MspDeInitCallback = HAL_UART_MspDeInit;
}
/* DeInit the low level hardware */
huart->MspDeInitCallback(huart);
#else
/* DeInit the low level hardware */
HAL_UART_MspDeInit(huart);
#endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
huart->ErrorCode = HAL_UART_ERROR_NONE;
huart->gState = HAL_UART_STATE_RESET;
huart->RxState = HAL_UART_STATE_RESET;
huart->ReceptionType = HAL_UART_RECEPTION_STANDARD;
/* Process Unlock */
__HAL_UNLOCK(huart);
return HAL_OK;
}
我查找HAL_UART_MspDeInit的参考时，出现了以下内容（stm32f4xx_hal_uart.c）：
__weak void HAL_UART_MspDeInit(UART_HandleTypeDef *huart)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(huart);
/* NOTE: This function should not be modified, when the callback is needed,
the HAL_UART_MspDeInit could be implemented in the user file
*/
}
还有另一个已实现的参考文件（stm32f4xx_hal_msp.c）：
void HAL_UART_MspDeInit(UART_HandleTypeDef* huart)
{
if(huart->Instance==USART1)
{
/* USER CODE BEGIN USART1_MspDeInit 0 */
/* USER CODE END USART1_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_USART1_CLK_DISABLE();
/**USART1 GPIO Configuration
PA9 ------> USART1_TX
PA10 ------> USART1_RX
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9|GPIO_PIN_10);
/* USER CODE BEGIN USART1_MspDeInit 1 */
/* USER CODE END USART1_MspDeInit 1 */
}
}
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