第八章 STM32定时器.pptVIP

8.8 STM32的系统时钟SysTick 3. GPIO的配置 void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; /*LED_D1～LED_D8 -- PB8～PB15 LED指示灯*/ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11 GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15; GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; GPIO_Init(GPIOB, GPIO_InitStructure); } 8.8 STM32的系统时钟SysTick 4. NVIC的配置 void NVIC_Configuration(void) { /*Set the Vector Table base location at 0/ #ifdef VECT_TAB_RAM NVIC_SetVectorTable(NVIC_VectTab_RAM,0x0); #else /*VECT_TAB_FLASH Set the Vector Table base location at 0*/ NVIC_SetVectorTable(NVIC_VectTab_FLASH,0x0); #endif } 5. SysTick延时子程序 void Systick_Delay(unsigned int ms) { Systick_ms_cnt = 0; while(Systick_ms_cnt ms); } 8.8 STM32的系统时钟SysTick 6. 主循环程序 int main() { RCC_Configuration(); NVIC_Configuration(); GPIO_Configuration(); SysTick_Configuration(); SysTick_CounterCmd(SysTick_Counter_Enable); while(1) { /*L1 L2 L3 L4闪烁,Insert 500 ms delay*/ GPIO_Write(GPIOB,0x0fff); Systick_Delay(500); /*L5 L6 L7 L8闪烁,Insert 1500 ms delay*/ GPIO_Write(GPIOB,0xf0ff); Systick_Delay(1500); } } 8.8 STM32的系统时钟SysTick 7. 变量定义 #include STM32F10X_LIB.h unsigned int Systick_ms_cnt; ErrorStatus HSEStartUpStatus; RCC_ClocksTypeDef RCC_ClocksStatus; void RCC_Configuration(void); void NVIC_Configuration(void); void GPIO_Configuration(void); void SysTick_Configuration(void); void Systick_Delay(unsigned int ms); credential: bring a computer die photo wafer : This can be an hidden slide. I just want to use this to do my own planning. I have rearranged Culler’s lecture slides slightly and add more slides. This covers everything he covers in his first lecture (and more) but may We will save the fun part, “ Levels of Organization,” at the end (so stu