stm32f103c8t6用三个引脚使用四个超声波测距的代码
时间: 2024-04-21 11:21:49 浏览: 24
对于STM32F103C8T6使用三个引脚实现四个超声波测距的代码,可以使用定时器和外部中断来实现。以下是一个简单的示例代码:
```c
#include "stm32f10x.h"
#define TRIG_PIN1 GPIO_Pin_0
#define ECHO_PIN1 GPIO_Pin_1
#define TRIG_PIN2 GPIO_Pin_2
#define ECHO_PIN2 GPIO_Pin_3
#define TRIG_PIN3 GPIO_Pin_4
#define ECHO_PIN3 GPIO_Pin_5
#define TRIG_PIN4 GPIO_Pin_6
#define ECHO_PIN4 GPIO_Pin_7
void TIM2_IRQHandler(void)
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
// 超声波测距逻辑处理
}
}
void EXTI1_IRQHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line1) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line1);
// 超声波测距逻辑处理
}
}
void EXTI3_IRQHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line3) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line3);
// 超声波测距逻辑处理
}
}
void EXTI9_5_IRQHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line5) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line5);
// 超声波测距逻辑处理
}
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
// 配置超声波引脚为输出模式
GPIO_InitStructure.GPIO_Pin = TRIG_PIN1 | TRIG_PIN2 | TRIG_PIN3 | TRIG_PIN4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// 配置超声波引脚为输入模式
GPIO_InitStructure.GPIO_Pin = ECHO_PIN1 | ECHO_PIN2 | ECHO_PIN3 | ECHO_PIN4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void TIM_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
// 配置定时器2
TIM_TimeBaseStructure.TIM_Period = 0xFFFF;
TIM_TimeBaseStructure.TIM_Prescaler = 71; // 72MHz / (71+1) = 1MHz
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
TIM_Cmd(TIM2, ENABLE);
}
void EXTI_Configuration(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
// 配置外部中断1
EXTI_InitStructure.EXTI_Line = EXTI_Line1;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
// 配置外部中断3
EXTI_InitStructure.EXTI_Line = EXTI_Line3;
EXTI_Init(&EXTI_InitStructure);
// 配置外部中断5
EXTI_InitStructure.EXTI_Line = EXTI_Line5;
EXTI_Init(&EXTI_InitStructure);
// 配置外部中断9
EXTI_InitStructure.EXTI_Line = EXTI_Line9;
EXTI_Init(&EXTI_InitStructure);
// 配置中断优先级
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
NVIC_Init(&NVIC_InitStructure);
}
int main(void)
{
GPIO_Configuration();
TIM_Configuration();
EXTI_Configuration();
while (1)
{
// 主循环逻辑处理
}
}
```
请注意,以上代码只是一个简单的示例,具体的实现可能需要根据你的硬件连接和需求进行适当的修改。另外,超声波测距的具体逻辑处理部分需要根据你的实际需求进行编写。