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一：第一次命令輸入
#include "stm32f4xx_hal.h"#define PACKET_START_BYTE 0x7E#define PACKET_END_BYTE 0x7E#define MAX_PACKET_SIZE 20 // 最大數(shù)據(jù)包大小秧秉，根據(jù)實(shí)際情況調(diào)整typedef struct {uint8_t device_address;uint8_t command;uint8_t data_length;uint8_t data[MAX_PACKET_SIZE];uint8_t checksum;uint8_t is_valid;} SerialPacket;SerialPacket received_packet;void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {static uint8_t buffer[MAX_PACKET_SIZE];static uint8_t buffer_index = 0;static uint8_t is_inside_packet = 0;if (huart == &huart2) {if (!is_inside_packet) {if (buffer_index == 0 && received_byte == PACKET_START_BYTE) {is_inside_packet = 1;buffer[buffer_index++] = received_byte;}} else {buffer[buffer_index++] = received_byte;if (buffer_index >= 4) {uint8_t data_length = buffer[3] - 2; // 計(jì)算數(shù)據(jù)區(qū)長度（不包括校驗(yàn)和和包尾）if (buffer_index == (data_length + 6)) { // 收到完整的數(shù)據(jù)包received_packet.device_address = buffer[1];received_packet.command = buffer[2];received_packet.data_length = data_length;for (int i = 0; i < data_length; i++) {received_packet.data[i] = buffer[4 + i];}received_packet.checksum = buffer[data_length + 4];received_packet.is_valid = 1;// 處理接收到的數(shù)據(jù)包褐桌，例如執(zhí)行相應(yīng)的命令// ...// 復(fù)位接收緩沖區(qū)和狀態(tài)buffer_index = 0;is_inside_packet = 0;}}}HAL_UART_Receive_IT(&huart2, &received_byte, 1); // 啟動下一次接收中斷}}int main(void) {// 初始化HAL庫和串口2HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_USART2_UART_Init();// 啟動接收中斷HAL_UART_Receive_IT(&huart2, &received_byte, 1);while (1) {// 在這里可以執(zhí)行其他任務(wù)// ...}}
二：第二次命令輸入
UART_HandleTypeDef huart2;typedef struct {uint8_t device_address;uint8_t command;uint8_t data_length;uint8_t data[MAX_PACKET_SIZE];uint8_t checksum;uint8_t is_valid;} SerialPacket;SerialPacket received_packet;// 接收緩沖區(qū)uint8_t rx_buffer[MAX_PACKET_SIZE];uint8_t rx_buffer_index = 0;uint8_t is_inside_packet = 0;void process_received_data() {// 在這里可以解析和處理接收到的數(shù)據(jù)包// 訪問 received_packet 中的數(shù)據(jù)進(jìn)行解析// 例如，你可以根據(jù) received_packet.command 執(zhí)行相應(yīng)的操作// ...// 清除接收緩沖區(qū)园湘，準(zhǔn)備接收下一個(gè)數(shù)據(jù)包memset(rx_buffer, 0, sizeof(rx_buffer));rx_buffer_index = 0;is_inside_packet = 0;}void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {if (huart == &huart2) {if (!is_inside_packet) {if (rx_buffer_index == 0 && rx_buffer[0] == PACKET_START_BYTE) {is_inside_packet = 1;}} else {rx_buffer[rx_buffer_index++] = received_byte;if (rx_buffer_index >= 4) {uint8_t data_length = rx_buffer[3] - 2; // 計(jì)算數(shù)據(jù)區(qū)長度（不包括校驗(yàn)和和包尾）if (rx_buffer_index == (data_length + 6)) { // 收到完整的數(shù)據(jù)包received_packet.device_address = rx_buffer[1];received_packet.command = rx_buffer[2];received_packet.data_length = data_length;for (int i = 0; i < data_length; i++) {received_packet.data[i] = rx_buffer[4 + i];}received_packet.checksum = rx_buffer[data_length + 4];received_packet.is_valid = 1;process_received_data(); // 處理接收到的數(shù)據(jù)包// 啟動下一次接收中斷HAL_UART_Receive_IT(&huart2, rx_buffer, 1);}}}}}int main(void) {// 初始化HAL庫和串口2HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_USART2_UART_Init();// 啟動接收中斷HAL_UART_Receive_IT(&huart2, rx_buffer, 1);while (1) {// 在這里可以執(zhí)行其他任務(wù)// ...}}
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