当我从 esp32 向 stm32 发送数据时，工作正常。但是当esp32最初使用uart从stm32接收数据时，数据似乎有一些随机字符。
当我发送 75 时，它在串行监视器中看起来像这样：
已收到：%$^#^12 收到：12 收到：12
我使用了KeilC和ArduinoIDE。 我只想从stm32获取“12”。 这是我的代码：
esp32：
#include <HardwareSerial.h>
#define UART_TX_PIN 17 // TX
#define UART_RX_PIN 16 // RX
int d1 = 7;
int d2 = 5;
char tx_array[10];
int flag = 0;
HardwareSerial SerialUART(2); // Create an instance of HardwareSerial for UART1
void setup()
{
Serial.begin(115200); // Initialize Serial Monitor for debugging
SerialUART.begin(115200, SERIAL_8N1, UART_RX_PIN, UART_TX_PIN); // Initialize UART1
}
void loop()
{
tx_array[0] = d1 + '0';
tx_array[1] = d2 + '0';
tx_array[2] = '\n'; // Line feed character
//tx_array[3] = '\0'; // Null terminator
SerialUART.print(tx_array);
if (SerialUART.available()) {
String receivedData = SerialUART.readStringUntil('\n'); // Read until newline
if (receivedData != "") {
// Process received data
Serial.println("Received: " + receivedData);
}
}
delay(500); // Add a small delay to prevent flooding the buffer
}
stm32：
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
#include "string.h"
#include "stdlib.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
char tx_buffer[10] = {0};
char rx_buffer[10] = {0};
char rx_array[10] = {0};
char result[10] = {0};
int received_value1;
int received_value2;
uint8_t count = 0;
uint8_t data = 0;
UART_HandleTypeDef huart1;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
char* fuzzy_logic_func(char input_array[])
{
input_array[strlen(input_array)] = '\0';
received_value1 = input_array[0] - '0'; //char to int
received_value2 = input_array[1] - '0';
int result_var = received_value1 + received_value2;
sprintf(result, "%d", result_var);
strcat(result, "\n");
HAL_UART_Transmit(&huart1, (uint8_t*)result, strlen(result), 100);
return result;
}
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
rx_buffer[count] = data;
count++;
if (data == 10)
{
for(int i = 0; i<10; i++)
{
rx_array[i] = rx_buffer[i];
rx_buffer[i] = 0;
//count = 0;
}
count = 0;
fuzzy_logic_func(rx_array);
}
HAL_UART_Receive_IT(&huart1, &data, 1);
}
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_USART1_UART_Init();
HAL_UART_Receive_IT(&huart1, &data, 1);
while (1)
{
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief USART1 Initialization Function
* @param None
* @retval None
*/
static void MX_USART1_UART_Init(void)
{
/* USER CODE BEGIN USART1_Init 0 */
/* USER CODE END USART1_Init 0 */
/* USER CODE BEGIN USART1_Init 1 */
/* USER CODE END USART1_Init 1 */
huart1.Instance = USART1;
huart1.Init.BaudRate = 115200;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN USART1_Init 2 */
/* USER CODE END USART1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
我可以问你详情吗？