STM32c8t6红外避障传感器初始化不使用GPIO
时间: 2023-07-30 17:07:27 浏览: 101
基于stm32的红外光电开关避障
如果你不想使用GPIO来初始化红外避障传感器,你可以使用外部中断来检测传感器的信号。以下是一个使用外部中断来初始化红外避障传感器的示例代码:
1. 首先需要定义一些常量和变量:
```c
#define IR_SENSOR_EXTI_LINE EXTI_Line0
#define IR_SENSOR_EXTI_PORTSOURCE EXTI_PortSourceGPIOA
#define IR_SENSOR_EXTI_PINSOURCE EXTI_PinSource0
#define IR_SENSOR_IRQn EXTI0_IRQn
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
```
2. 然后在主函数中初始化外部中断:
```c
int main(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_EXTILineConfig(IR_SENSOR_EXTI_PORTSOURCE, IR_SENSOR_EXTI_PINSOURCE);
EXTI_InitStructure.EXTI_Line = IR_SENSOR_EXTI_LINE;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = IR_SENSOR_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
```
3. 接下来,你可以在中断处理函数中读取红外传感器的值:
```c
void EXTI0_IRQHandler(void)
{
if (EXTI_GetITStatus(IR_SENSOR_EXTI_LINE) != RESET)
{
uint8_t ir_sensor_value = GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0);
if (ir_sensor_value == 1)
{
// 红外传感器检测到障碍物
}
else
{
// 没有障碍物
}
EXTI_ClearITPendingBit(IR_SENSOR_EXTI_LINE);
}
}
```
这是一个简单的使用外部中断来初始化红外传感器的例子,你可以在此基础上修改和完善。
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