使用stm32读取两个传感器的数据。传感器1:通过UART1发送FF 01 03 02 00 00 00 00 FB为关闭主动上报,发送:FF 01 03 03 02 00 00 00 F8,向传感器问询,传感器返回:XXX+%(ASCII码,数值+单位%),把返回的数值以float类型,保留四位小数保存。传感器2:通过UART2发送:11 01 01 ED读取O2 测量结果,返回结果为:16 09 01 DF1 DF2 DF3 DF4 DF5 DF6 DF7 DF8 [CS],数据处理方法为:O2 浓度值= (DF1*256 + DF2)/10 (Vol %),O2 流量值= (DF3*256 + DF4)/10 (L/min),O2 温度值= (DF5*256 + DF6)/10 (℃)。帮我写—段使用STM32F429,标准库读取这个传感器数值的代码
时间: 2023-11-27 11:52:24 浏览: 253
以下是使用STM32F429标准库读取传感器1和传感器2数值的代码:
```c
#include "stm32f4xx.h"
#include <stdio.h>
#include <string.h>
#define UART1_TX_PIN GPIO_Pin_9
#define UART1_RX_PIN GPIO_Pin_10
#define UART2_TX_PIN GPIO_Pin_5
#define UART2_RX_PIN GPIO_Pin_6
UART_HandleTypeDef UART1_Handle, UART2_Handle;
void MX_GPIO_Init(void);
void MX_USART1_UART_Init(void);
void MX_USART2_UART_Init(void);
void read_sensor1(void);
void read_sensor2(void);
int main(void) {
HAL_Init();
MX_GPIO_Init();
MX_USART1_UART_Init();
MX_USART2_UART_Init();
while (1) {
read_sensor1();
read_sensor2();
}
}
void read_sensor1(void) {
uint8_t txData[] = {0xFF, 0x01, 0x03, 0x03, 0x02, 0x00, 0x00, 0x00, 0xF8};
uint8_t rxData[100];
uint32_t timeout = 1000;
float value;
// Send command to sensor 1
HAL_UART_Transmit(&UART1_Handle, txData, sizeof(txData), timeout);
// Wait for response from sensor 1
HAL_UART_Receive(&UART1_Handle, rxData, sizeof(rxData), timeout);
// Extract value from response
char* start = strchr((char*)rxData, '%') + 1;
char* end = strchr(start, '%');
char valueStr[10];
strncpy(valueStr, start, end - start);
value = atof(valueStr);
// Print value
printf("Sensor 1 value: %.4f\n", value);
}
void read_sensor2(void) {
uint8_t txData[] = {0x11, 0x01, 0x01, 0xED};
uint8_t rxData[100];
uint32_t timeout = 1000;
float o2Concentration, o2FlowRate, o2Temperature;
// Send command to sensor 2
HAL_UART_Transmit(&UART2_Handle, txData, sizeof(txData), timeout);
// Wait for response from sensor 2
HAL_UART_Receive(&UART2_Handle, rxData, sizeof(rxData), timeout);
// Extract data from response
uint16_t df1 = (rxData[3] << 8) | rxData[4];
uint16_t df2 = (rxData[5] << 8) | rxData[6];
uint16_t df3 = (rxData[7] << 8) | rxData[8];
uint16_t df4 = (rxData[9] << 8) | rxData[10];
uint16_t df5 = (rxData[11] << 8) | rxData[12];
uint16_t df6 = (rxData[13] << 8) | rxData[14];
o2Concentration = ((float)(df1 * 256 + df2)) / 10.0;
o2FlowRate = ((float)(df3 * 256 + df4)) / 10.0;
o2Temperature = ((float)(df5 * 256 + df6)) / 10.0;
// Print data
printf("Sensor 2 O2 concentration: %.4f Vol %%\n", o2Concentration);
printf("Sensor 2 O2 flow rate: %.4f L/min\n", o2FlowRate);
printf("Sensor 2 O2 temperature: %.4f deg C\n", o2Temperature);
}
void MX_GPIO_Init(void) {
GPIO_InitTypeDef GPIO_InitStruct;
__GPIOA_CLK_ENABLE();
__GPIOB_CLK_ENABLE();
__GPIOC_CLK_ENABLE();
// UART1 GPIO configuration
GPIO_InitStruct.Pin = UART1_TX_PIN | UART1_RX_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
// UART2 GPIO configuration
GPIO_InitStruct.Pin = UART2_TX_PIN | UART2_RX_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
void MX_USART1_UART_Init(void) {
UART1_Handle.Instance = USART1;
UART1_Handle.Init.BaudRate = 9600;
UART1_Handle.Init.WordLength = UART_WORDLENGTH_8B;
UART1_Handle.Init.StopBits = UART_STOPBITS_1;
UART1_Handle.Init.Parity = UART_PARITY_NONE;
UART1_Handle.Init.Mode = UART_MODE_TX_RX;
UART1_Handle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
UART1_Handle.Init.OverSampling = UART_OVERSAMPLING_16;
HAL_UART_Init(&UART1_Handle);
}
void MX_USART2_UART_Init(void) {
UART2_Handle.Instance = USART2;
UART2_Handle.Init.BaudRate = 9600;
UART2_Handle.Init.WordLength = UART_WORDLENGTH_8B;
UART2_Handle.Init.StopBits = UART_STOPBITS_1;
UART2_Handle.Init.Parity = UART_PARITY_NONE;
UART2_Handle.Init.Mode = UART_MODE_TX_RX;
UART2_Handle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
UART2_Handle.Init.OverSampling = UART_OVERSAMPLING_16;
HAL_UART_Init(&UART2_Handle);
}
```
在主函数中,我们调用 `read_sensor1()` 和 `read_sensor2()` 函数分别读取传感器1和传感器2的数据。这两个函数分别使用 `HAL_UART_Transmit()` 和 `HAL_UART_Receive()` 函数来发送和接收数据。接收到数据后,我们需要对数据进行处理,提取出需要的数值并转换为 `float` 类型。最后我们使用 `printf()` 函数将数值打印出来。
需要注意的是,在初始化函数中我们需要配置每个UART的GPIO引脚。在本例中,我们使用了USART1和USART2,并且将它们的TX引脚连接到PB9和PA5,RX引脚连接到PB10和PA6。
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