基于stm32f103c8t6的湿度检测代码
时间: 2024-01-05 08:03:27 浏览: 21
根据提供的引用内容,以下是基于STM32F103C8T6的湿度检测代码的一个示例:
```c
#include "stm32f10x.h"
#define DHT11_PIN GPIO_Pin_0
#define DHT11_PORT GPIOA
void delay_us(uint32_t us) {
us *= 8;
while (us--) {
__NOP();
}
}
void DHT11_Init(void) {
GPIO_InitTypeDef GPIO_InitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStruct.GPIO_Pin = DHT11_PIN;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(DHT11_PORT, &GPIO_InitStruct);
}
void DHT11_Start(void) {
GPIO_SetBits(DHT11_PORT, DHT11_PIN);
delay_us(30);
GPIO_ResetBits(DHT11_PORT, DHT11_PIN);
delay_us(18);
GPIO_SetBits(DHT11_PORT, DHT11_PIN);
delay_us(40);
}
uint8_t DHT11_Check_Response(void) {
uint8_t response = 0;
delay_us(40);
if (!GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN)) {
delay_us(80);
if (GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN)) {
response = 1;
}
}
while (GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
;
return response;
}
uint8_t DHT11_Read_Bit(void) {
while (!GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
;
delay_us(40);
if (GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN)) {
while (GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
;
return 1;
} else {
while (!GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
;
return 0;
}
}
uint8_t DHT11_Read_Byte(void) {
uint8_t byte = 0;
for (int i = 0; i < 8; i++) {
byte <<= 1;
byte |= DHT11_Read_Bit();
}
return byte;
}
void DHT11_Read_Data(uint8_t *humidity, uint8_t *temperature) {
DHT11_Start();
if (DHT11_Check_Response()) {
*humidity = DHT11_Read_Byte();
DHT11_Read_Byte();
*temperature = DHT11_Read_Byte();
DHT11_Read_Byte();
uint8_t checksum = DHT11_Read_Byte();
if (*humidity + *temperature != checksum) {
*humidity = 0;
*temperature = 0;
}
} else {
*humidity = 0;
*temperature = 0;
}
}
int main(void) {
uint8_t humidity, temperature;
DHT11_Init();
while (1) {
DHT11_Read_Data(&humidity, &temperature);
// 在这里可以根据读取到的湿度和温度进行相应的处理
}
}
```
请注意,这只是一个基本的湿度检测代码示例,你可能需要根据具体的硬件和需求进行适当的修改和调整。