[mw_shl_code=c,true]int main() { u16 led0pwmval=300; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); uart_init(115200); TIM5_PWM_Init(500-1,84-1); USART_SendData(USART1,0xff); TIM_SetCompare1(TIM5,led0pwmval); ｝[/mw_shl_code] 执行完main函数之后就跳入启动文件

[mw_shl_code=c,true]Reset_Handler PROC EXPORT Reset_Handler [WEAK] IMPORT SystemInit IMPORT __main LDR R0, =SystemInit BLX R0 LDR R0, =__main BX R0 ENDP[/mw_shl_code] 然后卡在system_stm32f4xx.c文件 [mw_shl_code=c,true]while((RCC->CR & RCC_CR_PLLRDY) == 0) { } #if defined (STM32F427_437xx) || defined (STM32F429_439xx) /* Enable the Over-drive to extend the clock frequency to 180 Mhz */ PWR->CR |= PWR_CR_ODEN; while((PWR->CSR & PWR_CSR_ODRDY) == 0) { } PWR->CR |= PWR_CR_ODSWEN; while((PWR->CSR & PWR_CSR_ODSWRDY) == 0) { } [/mw_shl_code]
一开始我像F103一样把启动文件里面SystemInit相关代码删除后程序就进入
hardfault_Hander故障