使用stm32读取传感器串口数据。通过usart发送:01 04 0000 0006 CRC ,读取0位开始,6个接口的读数,传感器返回数据为:从机响应:01 04 04 DATA1 ~DATA12 CRC 对应为:地址 功能码 数据长度 AI1高 AI1低 ~AI6高 AI6低 CRC码,请帮我写—段使用STM32F429,标准库读取这个传感器数值的代码
时间: 2024-02-29 14:51:18 浏览: 64
好的,以下是一个简单的使用STM32F429标准库读取传感器数据的代码示例:
```c
#include "stm32f4xx.h"
#include "stdio.h"
#include "string.h"
#define USARTx USART1
#define USARTx_CLK RCC_APB2Periph_USART1
#define USARTx_CLK_CMD RCC_APB2PeriphClockCmd
#define USARTx_IRQn USART1_IRQn
#define USARTx_IRQHandler USART1_IRQHandler
#define USARTx_TX_PIN GPIO_Pin_9
#define USARTx_TX_GPIO_PORT GPIOA
#define USARTx_TX_GPIO_CLK RCC_AHB1Periph_GPIOA
#define USARTx_TX_SOURCE GPIO_PinSource9
#define USARTx_TX_AF GPIO_AF_USART1
#define USARTx_RX_PIN GPIO_Pin_10
#define USARTx_RX_GPIO_PORT GPIOA
#define USARTx_RX_GPIO_CLK RCC_AHB1Periph_GPIOA
#define USARTx_RX_SOURCE GPIO_PinSource10
#define USARTx_RX_AF GPIO_AF_USART1
#define BUFFER_SIZE 50
USART_InitTypeDef USART_InitStructure;
uint8_t RxBuffer[BUFFER_SIZE];
uint8_t TxBuffer[BUFFER_SIZE];
void USART_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIO clock */
RCC_AHB1PeriphClockCmd(USARTx_TX_GPIO_CLK | USARTx_RX_GPIO_CLK, ENABLE);
/* Enable USART clock */
USARTx_CLK_CMD(USARTx_CLK, ENABLE);
/* Connect USART pins to AF */
GPIO_PinAFConfig(USARTx_TX_GPIO_PORT, USARTx_TX_SOURCE, USARTx_TX_AF);
GPIO_PinAFConfig(USARTx_RX_GPIO_PORT, USARTx_RX_SOURCE, USARTx_RX_AF);
/* Configure USART Tx and Rx as alternate function push-pull */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Pin = USARTx_TX_PIN;
GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = USARTx_RX_PIN;
GPIO_Init(USARTx_RX_GPIO_PORT, &GPIO_InitStructure);
/* USART configuration */
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USARTx, &USART_InitStructure);
/* Enable USART */
USART_Cmd(USARTx, ENABLE);
}
void USART_SendData(USART_TypeDef* USARTx, uint16_t Data)
{
/* Transmit Data */
USART_SendData(USARTx, Data);
/* Wait until transmit complete */
while (USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET);
}
uint16_t CRC16(uint8_t *puchMsg, uint16_t usDataLen)
{
uint16_t uchCRCHi = 0xFF;
uint16_t uchCRCLo = 0xFF;
uint16_t uIndex;
while (usDataLen--)
{
uIndex = uchCRCLo ^ *puchMsg++;
uchCRCLo = uchCRCHi ^ auchCRCHi[uIndex];
uchCRCHi = auchCRCLo[uIndex];
}
return (uchCRCHi << 8 | uchCRCLo);
}
int main(void)
{
USART_Configuration();
uint8_t length = 0x06; // 数据长度
uint16_t crc = 0x0000; // CRC校验码
// 发送请求
TxBuffer[0] = 0x01;
TxBuffer[1] = 0x04;
TxBuffer[2] = 0x00;
TxBuffer[3] = 0x00;
TxBuffer[4] = 0x00;
TxBuffer[5] = length;
crc = CRC16(TxBuffer, length + 2);
TxBuffer[6] = crc >> 8 & 0xFF;
TxBuffer[7] = crc & 0xFF;
for (int i = 0; i < 8; i++) {
USART_SendData(USARTx, TxBuffer[i]);
}
// 接收数据
uint16_t data[6];
memset(RxBuffer, 0, sizeof(RxBuffer));
for (int i = 0; i < 9; i++) {
while (USART_GetFlagStatus(USARTx, USART_FLAG_RXNE) == RESET);
RxBuffer[i] = USART_ReceiveData(USARTx);
}
for (int i = 0; i < 6; i++) {
data[i] = (RxBuffer[3 + i * 2] << 8) | RxBuffer[4 + i * 2];
}
// 处理数据
// ...
while(1);
}
```
这个代码示例中,我们使用了STM32的USART1模块来读取传感器串口数据,并且使用了CRC16算法来计算校验码。同时,我们将读取到的数据存储在`data`数组中,可以根据实际需要进行进一步的处理。
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