uint8_t lpuart_tx_buffer[LPUART_TX_BUFFER_LENGTH] = {0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A};括号中的数据类型
时间: 2024-01-07 09:04:06 浏览: 12
括号中的数据类型是 uint8_t,它是 C 语言中无符号 8 位整数类型,取值范围是 0~255。这里定义了一个长度为 LPUART_TX_BUFFER_LENGTH 的 uint8_t 类型数组 lpuart_tx_buffer,并初始化为 {0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A}。
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void sentmes(void) { uint8_t length = 0x06; // 数据长度 // 发送请求 TxBuffer[0] = 0x01; TxBuffer[1] = 0x04; TxBuffer[2] = 0x00; TxBuffer[3] = 0x00; TxBuffer[4] = 0x00; TxBuffer[5] = length; TxBuffer[6] = 0x70; TxBuffer[7] = 0x08; for (int i = 0; i < 8; i++) { USART_SendData(DEBUG_USART, TxBuffer[i]); } }检查一下这段代码是否有错
从代码来看,目前没有显然的错误。但是需要了解一些背景信息才能完全确定代码的正确性。例如,需要确认 `TxBuffer` 数组的大小是否与程序的其他部分相匹配,以及 `DEBUG_USART` 是否正确配置等。此外,还需要检查 `sentmes()` 函数的调用方式和上下文,以确保它在正确的时机被调用。
#include "stm32f10x.h"#include "stdio.h"#define RX_BUFFER_SIZE 9uint8_t rx_buffer[RX_BUFFER_SIZE];uint8_t rx_index = 0;void USART1_Init(void){ GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; // 打开USART1和GPIOA时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE); // 配置USART1的GPIO引脚 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); // 配置USART1的通信参数 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(USART1, &USART_InitStructure); // 打开USART1 USART_Cmd(USART1, ENABLE);}void USART1_IRQHandler(void){ if (USART_GetITStatus(USART1, USART_IT_RXNE) == SET) { uint8_t data = USART_ReceiveData(USART1); if (rx_index < RX_BUFFER_SIZE) { rx_buffer[rx_index++] = data; } if (rx_index == RX_BUFFER_SIZE) { USART_ITConfig(USART1, USART_IT_RXNE, DISABLE); } }}int main(void){ USART1_Init(); while (1) { // 发送查询指令 USART_SendData(USART1, 0xFF); USART_SendData(USART1, 0x01); USART_SendData(USART1, 0x86); USART_SendData(USART1, 0x00); USART_SendData(USART1, 0x00); USART_SendData(USART1, 0x00); USART_SendData(USART1, 0x00); USART_SendData(USART1, 0x00); USART_SendData(USART1, 0x79); // 等待数据接收完成 rx_index = 0; USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); while (rx_index < RX_BUFFER_SIZE); // 计算甲醛浓度 uint16_t ch2o_raw = (rx_buffer[2] << 8) | rx_buffer[3]; float ch2o_conc = ch2o_raw / 1000.0; // 显示甲醛浓度 printf("CH2O Concentration: %.3f mg/m3\r\n", ch2o_conc); // 等待一段时间后再进行下一次检测 delay_ms(1000); }}void delay_ms(uint32_t ms){ uint32_t i, j; for (i = 0; i < ms; i++) for (j = 0; j < 2000; j++);}代码中串口是不是错了,应该是usart3吧
是的,你说得对,代码中的串口定义应该改为USART3,如下所示:
```c
#include "stm32f10x.h"
#include "stdio.h"
#define RX_BUFFER_SIZE 9
uint8_t rx_buffer[RX_BUFFER_SIZE];
uint8_t rx_index = 0;
void USART3_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
// 打开USART3和GPIOB时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
// 配置USART3的GPIO引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// 配置USART3的通信参数
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure