5、中断处理 /** * @brief TIM2 Update/Overflow/Trigger/Break /USART2 TX Interrupt routine. * @param None * @retval None */ INTERRUPT_HANDLER(TIM2_UPD_OVF_TRG_BRK_USART2_TX_IRQHandler,19) { /* In order to detect unexpected events during development, it is recommended to set a breakpoint on the following instruction. */