keil5写入温湿度传感器
时间: 2023-09-01 14:12:40 浏览: 49
要使用Keil5写入温湿度传感器,您需要先了解传感器的通信协议,通常温湿度传感器使用I2C或者SPI协议进行通信。您需要根据具体的传感器型号查看其数据手册,以了解其通信协议和寄存器映射。
然后,您需要编写代码来初始化和配置传感器,以及读取传感器的数据。在Keil5中,您可以使用相应的库函数来完成这些任务。例如,对于I2C通信,您可以使用Keil提供的I2C库函数,对于SPI通信,您可以使用Keil提供的SPI库函数。
以下是一个基本的温湿度传感器读取数据的示例代码:
```c
#include <stdio.h>
#include <stdlib.h>
#include "stm32f4xx.h"
#include "stm32f4xx_i2c.h"
#define SHT31_ADDRESS 0x44
I2C_InitTypeDef I2C_InitStruct;
void I2C_Configuration(void)
{
I2C_InitStruct.I2C_ClockSpeed = 100000;
I2C_InitStruct.I2C_Mode = I2C_Mode_I2C;
I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStruct.I2C_OwnAddress1 = 0x00;
I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_Init(I2C1, &I2C_InitStruct);
I2C_Cmd(I2C1, ENABLE);
}
void SHT31_Configuration(void)
{
uint8_t tx_data[2];
tx_data[0] = 0x24;
tx_data[1] = 0x00;
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, SHT31_ADDRESS, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, tx_data[0]);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, tx_data[1]);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTOP(I2C1, ENABLE);
}
float ReadTemperature(void)
{
uint8_t tx_data[2];
uint8_t rx_data[6];
float temperature;
tx_data[0] = 0x24;
tx_data[1] = 0x00;
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, SHT31_ADDRESS, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, tx_data[0]);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, tx_data[1]);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTOP(I2C1, ENABLE);
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, SHT31_ADDRESS, I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
rx_data[0] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
rx_data[1] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
rx_data[2] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
rx_data[3] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
rx_data[4] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
rx_data[5] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, DISABLE);
I2C_GenerateSTOP(I2C1, ENABLE);
temperature = (float)((rx_data[0] << 8) | rx_data[1]);
temperature *= 175;
temperature /= 0xFFFF;
temperature = -45 + temperature;
return temperature;
}
float ReadHumidity(void)
{
uint8_t tx_data[2];
uint8_t rx_data[6];
float humidity;
tx_data[0] = 0x24;
tx_data[1] = 0x00;
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, SHT31_ADDRESS, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, tx_data[0]);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, tx_data[1]);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTOP(I2C1, ENABLE);
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, SHT31_ADDRESS, I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
rx_data[0] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
rx_data[1] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
rx_data[2] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
rx_data[3] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
rx_data[4] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
rx_data[5] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, DISABLE);
I2C_GenerateSTOP(I2C1, ENABLE);
humidity = (float)((rx_data[3] << 8) | rx_data[4]);
humidity *= 100;
humidity /= 0xFFFF;
return humidity;
}
int main(void)
{
I2C_Configuration();
SHT31_Configuration();
while(1)
{
float temperature = ReadTemperature();
float humidity = ReadHumidity();
printf("Temperature: %.2f C, Humidity: %.2f%%\r\n", temperature, humidity);
delay_ms(1000);
}
}
```
上述代码使用了STM32F4系列的I2C库函数来读取SHT31温湿度传感器的数据。其中,`I2C_Configuration()`和`SHT31_Configuration()`函数用于初始化和配置I2C和SHT31传感器。`ReadTemperature()`和`ReadHumidity()`函数分别用于读取温度和湿度数据。最后,在主函数中循环读取传感器数据并打印输出。
请注意,上述代码仅为示例,具体实现方式应根据实际情况进行修改和优化。