Question
software error keeps mcu in reset
Posted on November 01, 2016 at 15:11
Recently I have observed an odd phenomenon: I have a code (which I believe is faulty) , I program the MCU (which initially is fully erased ) with that code;
after that the MCU can not be reprogrammed by programming environment (CooCox IDE).So I have to use ST Link utility to erase the chip using connection under reset method, and after this CooCox can reprogram the MCU.(but just once)If i remove from the source code the function which I believe is causing this behaviour , CooCox can reprogram my chip as many times as I want.The MCU used is the one found on STM32F072 Disco Board.The source code is :int main(void){ /*!< At this stage the microcontroller clock setting is already configured, this is done through SystemInit() function which is called from startup file (startup_stm32f0xx.s) before to branch to application main. To reconfigure the default setting of SystemInit() function, refer to system_stm32f0xx.c file */ gpio_config(); /* Infinite loop */ u8 i=0; while (1) { }}void gpio_config(void){ GPIO_InitTypeDef GPIO_InitStructure; EXTI_InitTypeDef EXTI_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; GPIO_StructInit(&GPIO_InitStructure); RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA|RCC_AHBPeriph_GPIOB|RCC_AHBPeriph_GPIOF,ENABLE); /* Enable SYSCFG clock for EXTI controller */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;//50MHz // PB3,4,12,13,14,15 PA8..13; PF6 GPIO_InitStructure.GPIO_Pin = D1_Pin|SegA_Pin|SegB_Pin|SegD_Pin|SegE_Pin; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = D2_Pin|D3_Pin|D4_Pin|SegC_Pin|SegG_Pin; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = SegF_Pin; /GPIO_Init(GPIOF, &GPIO_InitStructure); //K1 , K2 relays pins GPIO_InitStructure.GPIO_Pin = K1Pin|K2Pin; GPIO_InitStructure.GPIO_Mode = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;//50MHz GPIO_Init(RelayPort, &GPIO_InitStructure); //buttons GPIO_InitStructure.GPIO_Pin= SW1Pin|SW2Pin|SW3Pin; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;//50MHz GPIO_Init(SWPort, &GPIO_InitStructure); //buttons interrupts /* Configure EXTI7 line */ EXTI_InitStructure.EXTI_Line = EXTI_Line7; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); /* Configure EXTI6 line */ EXTI_InitStructure.EXTI_Line = EXTI_Line6; EXTI_Init(&EXTI_InitStructure); /* Configure EXTI5 line */ EXTI_InitStructure.EXTI_Line = EXTI_Line5; EXTI_Init(&EXTI_InitStructure); /* Enable and set EXTI4..15 Interrupt to the lowest priority */ NVIC_InitStructure.NVIC_IRQChannel = EXTI4_15_IRQn; NVIC_InitStructure.NVIC_IRQChannelPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure);}and that it is all. USE_FULL_ASSERT is disabledphenomenon
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