Main.c #include "stm32f10x.h" #include "usart1.h" #include "adc.h" #include "Time_test.h" u32 flag; u32 f=0; volatile u32 time=0; volatile u32 time1=0; /* ADC1 转换的电压值通过MDA 方式传到SRAM */ extern __IO uint16_t ADC_ConvertedValue; /* 局部变量，用于保存转换计算后的电压值*/ float ADC_ConvertedValueLocal; /* 软件延时*/ void Delay(__IO uint32_t nCount) { for(; nCount != 0; nCount--); } int main(void) { SystemInit(); /* USART1 config */ USART1_Config(); /* enable adc1 and config adc1 to dma mode */ ADC1_Init(); /* TIM2 定时配置 */ TIM2_NVIC_Configuration(); TIM2_Configuration(); TIM3_NVIC_Configuration(); /* TIM2 开始计时 */ START_TIME; STOP_TIME3; while (1) { } } Time_test.c #include "Time_test.h" void TIM2_NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority =4; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } void TIM3_NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority =1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } /*TIM_Period--1000 TIM_Prescaler--71 -->中断周期为 125us*/ void TIM2_Configuration(void) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 , ENABLE); TIM_DeInit(TIM2); TIM_TimeBaseStructure.TIM_Period=125; /* 自动重装载寄存器周期的值(计数值),中断间隔125us */ /* 累计 TIM_Period 个频率后产生一个更新或者中断 */ TIM_TimeBaseStructure.TIM_Prescaler= (56 - 1); /*时钟预分频数 72M...
