uart_init.USART_WordLength = serial_config->serial_word_length;
时间: 2023-10-15 22:07:01 浏览: 142
这段代码的作用是将一个叫做uart_init的结构体变量中的USART_WordLength成员变量设置为一个叫做serial_config的结构体变量中的serial_word_length成员变量的值,以便在后续使用该USART通信接口进行数据传输时,将数据位设置为serial_word_length的值。USART_WordLength是USART通信接口的数据位寄存器,用于控制USART通信接口每个数据帧的数据位数。而serial_config->serial_word_length则是一个存储了数据位数的变量,表示使用该数据位数进行数据传输。通过将serial_config->serial_word_length的值赋给uart_init.USART_WordLength,可以将数据位设置为serial_word_length的值,以便后续使用该USART通信接口进行数据传输。
相关问题
stm32f103 zet6使用串口uart4接收openmv函数uart.write(“@123+123/r/n”),写出serial.h serial.cmain.c文件
在STM32F103 ZET6中使用UART4接收OpenMV的`uart.write()`数据,你需要准备三个文件:`serial.h`头文件,`serial.c`实现文件以及主程序`main.c`。这里是一个基础的例子结构:
**serial.h (头文件)**:
```c
#include "stm32f1xx_hal.h"
#include "stdio.h"
extern UART_HandleTypeDef huart4;
void init_uart(void);
int receive_data(char* buffer, uint16_t size);
```
**serial.c (实现文件):**
```c
#include "serial.h"
#define BUFFER_SIZE 64
// 初始化UART4
void init_uart(void) {
huart4.Instance = USART4;
huart4.Init.BaudRate = 9600; // 设置波特率
huart4.Init.WordLength = UART_WORDLENGTH_8B;
huart4.Init.StopBits = UART_STOPBITS_1;
huart4.Init.Parity = UART_PARITY_NONE;
huart4.Init.Mode = UART_MODE_TX_RX;
HAL_UART_Init(&huart4);
}
// 接收数据函数
int receive_data(char* buffer, uint16_t size) {
while (!HAL_UART_GetData(&huart4)) {} // 等待接收缓冲区有数据可用
if (HAL_UART_CheckReceive(&huart4) == HAL_OK) {
uint8_t* data = (uint8_t*)buffer;
for (size_t i = 0; i < size && HAL_UART_GetData(&huart4); ++i, ++data) {
*data = (char)HAL_UART_ReadData(&huart4);
}
return size;
} else {
return 0; // 数据接收失败
}
}
```
**main.c (主程序):**
```c
#include "stm32f1xx_hal.h"
#include "serial.h"
int main(void) {
HAL_Init();
SystemClock_Config();
// 初始化UART4
init_uart();
char received_buffer[BUFFER_SIZE];
int bytes_received;
while (1) {
bytes_received = receive_data(received_buffer, sizeof(received_buffer));
if (bytes_received > 0) {
printf("Received: %s\n", received_buffer); // 打印接收到的数据
}
}
return 0;
}
```
注意,这只是一个基本的框架,实际应用中你可能还需要处理中断、错误处理等细节,并且OpenMV发送数据的方式可能会有一些差异。上述代码假设OpenMV发送的是ASCII文本。
你能提供esp32-cam和stm32h7串口通信相关代码吗
当然可以!以下是一个简单的串口通信示例代码,使用ESP32-CAM作为发送端,STM32H7作为接收端:
ESP32-CAM代码:
```c
#include <WiFi.h>
#include <WiFiClient.h>
#include <WebServer.h>
#include "esp_camera.h"
#include <HardwareSerial.h>
#define SSID "Your_SSID"
#define PASSWORD "Your_PASSWORD"
#define SERIAL_BAUDRATE 115200
WebServer server(80);
HardwareSerial Serial2(2);
void setup() {
Serial.begin(SERIAL_BAUDRATE);
Serial2.begin(SERIAL_BAUDRATE, SERIAL_8N1, 16, 17);
Serial.println();
Serial.println("Connecting to Wi-Fi");
WiFi.begin(SSID, PASSWORD);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to Wi-Fi");
Serial.println("Starting web server...");
server.on("/", [](){
String html = "<html><body>";
html += "<h1>ESP32-CAM</h1>";
html += "<img src=\"/stream\">";
html += "</body></html>";
server.send(200, "text/html", html);
});
server.on("/stream", [](){
String boundary = "123456789000000000000987654321";
String header = "--" + boundary + "\r\nContent-Type: image/jpeg\r\nContent-Length: ";
String footer = "\r\n";
camera_fb_t *fb = NULL;
fb = esp_camera_fb_get();
if(!fb) {
Serial.println("Camera capture failed");
server.send(503, "text/plain", "Camera capture failed");
return;
}
String response = header + String(fb->len) + footer;
server.sendContent(response);
server.sendContent((const uint8_t *)fb->buf, fb->len);
esp_camera_fb_return(fb);
});
server.begin();
Serial.println("Web server started");
}
void loop() {
server.handleClient();
if(Serial2.available()) {
byte data = Serial2.read();
Serial.write(data);
}
}
```
STM32H7代码:
```c
#include "main.h"
#include "stm32h7xx_hal.h"
#include <string.h>
UART_HandleTypeDef huart3;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART3_UART_Init(void);
int main(void) {
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_USART3_UART_Init();
uint8_t buffer[1024] = {0};
while (1) {
if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_14) == GPIO_PIN_RESET) {
HAL_Delay(10);
if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_14) == GPIO_PIN_RESET) {
HAL_UART_Transmit(&huart3, (uint8_t*)"Hello from STM32H7!\r\n", strlen("Hello from STM32H7!\r\n"), HAL_MAX_DELAY);
memset(buffer, 0, sizeof(buffer));
HAL_UART_Receive(&huart3, buffer, sizeof(buffer), HAL_MAX_DELAY);
HAL_UART_Transmit(&huart3, buffer, strlen((char*)buffer), HAL_MAX_DELAY);
}
}
}
}
void SystemClock_Config(void) {
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 400;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 4;
RCC_OscInitStruct.PLL.PLLR = 4;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
Error_Handler();
}
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) {
Error_Handler();
}
}
static void MX_USART3_UART_Init(void) {
huart3.Instance = USART3;
huart3.Init.BaudRate = 115200;
huart3.Init.WordLength = UART_WORDLENGTH_8B;
huart3.Init.StopBits = UART_STOPBITS_1;
huart3.Init.Parity = UART_PARITY_NONE;
huart3.Init.Mode = UART_MODE_TX_RX;
huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart3.Init.OverSampling = UART_OVERSAMPLING_16;
if (HAL_UART_Init(&huart3) != HAL_OK) {
Error_Handler();
}
}
static void MX_GPIO_Init(void) {
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOB_CLK_ENABLE();
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_14, GPIO_PIN_SET);
GPIO_InitStruct.Pin = GPIO_PIN_14;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
}
```
在ESP32-CAM上,我们使用Serial2对象来初始化并配置串口,然后在loop()函数中检查Serial2的可用性。如果有数据可读,则从串口读取数据并将其发送到串口0(即通过USB连接到计算机的串口)。这样,我们可以使用串口监视器来查看ESP32-CAM发送的数据。
在STM32H7上,我们使用HAL_UART_Receive()函数从串口接收数据,并使用HAL_UART_Transmit()函数将数据发送回ESP32-CAM。在这个例子中,我们使用PB14引脚作为用户按钮,当按下按钮时,我们将向ESP32-CAM发送“Hello from STM32H7!”字符串,并等待ESP32-CAM的响应。收到响应后,我们将其发送回ESP32-CAM。
请注意,这只是一个简单的示例,实际应用程序可能需要更复杂的通信协议来确保数据的完整性和正确性。
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