基于stm32写一个霍尔测速传感器3144的模拟量输出库函数程序
时间: 2023-07-15 12:11:30 浏览: 54
以下是一个基于STM32的霍尔测速传感器3144的模拟量输出库函数程序的示例:
```c
#include "stm32f10x.h"
#define HALL_SENSOR_PIN GPIO_Pin_0
#define HALL_SENSOR_PORT GPIOA
void HallSensor_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
// Enable GPIO and TIM clocks
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
// Configure GPIO as input
GPIO_InitStructure.GPIO_Pin = HALL_SENSOR_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(HALL_SENSOR_PORT, &GPIO_InitStructure);
// Configure TIM2 for PWM output
TIM_TimeBaseStructure.TIM_Period = 65535;
TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
// Enable TIM2
TIM_Cmd(TIM2, ENABLE);
}
uint16_t HallSensor_GetOutput(void)
{
uint16_t output = 0;
if (GPIO_ReadInputDataBit(HALL_SENSOR_PORT, HALL_SENSOR_PIN) == GPIO_Pin_Set)
{
output = 65535;
}
return output;
}
```
在这个示例中,我们使用了STM32的GPIO和TIM模块来实现霍尔测速传感器的模拟量输出。在`HallSensor_Init`函数中,我们初始化了GPIO口和TIM2,并将TIM2配置为PWM输出。在`HallSensor_GetOutput`函数中,我们读取GPIO口的状态并返回相应的PWM输出。需要注意的是,这个示例中使用了定时器TIM2,并假设霍尔传感器的输出电平为高电平时对应的PWM输出为最大值65535。实际使用时需要根据具体的硬件连接和传感器特性进行调整。