写一段stm32 comp out io实现比较器的例子代码
时间: 2023-03-04 15:25:37 浏览: 52
以下是一个基于STM32的比较器实现的示例代码,其中使用了COMP2输入端口(PA7)和COMP2输出端口(PB3)。
```c
#include "stm32f1xx_hal.h"
COMP_HandleTypeDef hcomp;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_COMP2_Init(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_COMP2_Init();
HAL_COMP_Start(&hcomp); // 启动比较器
while (1)
{
if (HAL_COMP_GetOutputLevel(&hcomp) == COMP_OUTPUT_LEVEL_HIGH)
{
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_3, GPIO_PIN_SET); // COMP2输出高电平
}
else
{
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_3, GPIO_PIN_RESET); // COMP2输出低电平
}
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
// 初始化PA7为比较器输入引脚
GPIO_InitStruct.Pin = GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
// 初始化PB3为比较器输出引脚
GPIO_InitStruct.Pin = GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
}
static void MX_COMP2_Init(void)
{
hcomp.Instance = COMP2;
hcomp.Init.InvertingInput = COMP_INVERTINGINPUT_VREFINT;
hcomp.Init.NonInvertingInput = COMP_NONINVERTINGINPUT_IO1;
hcomp.Init.OutputPol = COMP_OUTPUTPOL_NONINVERTED;
hcomp.Init.Mode = COMP_MODE_HIGHSPEED;
hcomp.Init.WindowMode = COMP_WINDOWMODE_DISABLE;
hcomp.Init.TriggerMode = COMP_TRIGGERMODE_IT_RISING_FALLING;