- 新增 HC-SR04 驱动与测距接口(bsp_sr04) - 增加循迹状态读取与输出,完善任务内日志 - 调整 CarCtrl 闭环更新周期,匹配霍尔测速周期,降低抖动 - 同步更新 CubeMX/CMake 生成配置与相关引脚定义
358 lines
11 KiB
C
358 lines
11 KiB
C
/**
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* @file protocol.c
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* @brief 协议处理函数实现
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* @details 该文件包含了协议解析和处理的相关函数,主要用于处理从 ESP12F
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* 模块接收到的数据。
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* @author Beihong Wang
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* @date 2026-04-01
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*/
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#include "protocol.h"
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#include "bsp_motor.h"
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#include "bsp_hall.h"
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#include "bsp_pid.h"
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#include "bsp_uart.h"
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#include "checksum.h"
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#include "cmsis_os.h"
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#include "elog.h"
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#include <stdio.h>
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#include <string.h>
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/* 定义日志 TAG */
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#define Protocol_TAG "Protocol"
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/* 小车控制状态相关定义 */
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#define CAR_PWM_MAX 3599U // PWM最大值,对应100%
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/* PID 闭环参数,针对低速高摩擦环境优化 */
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#define MOTOR_KP 6.5f
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#define MOTOR_KI 2.5f // 微增 KI,消除最后 2-3 RPM 的静差
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#define MOTOR_KD 0.1f
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#define TARGET_MAX_RPM 50.0f // 100% 对应 50 RPM
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#define MOTOR_PWM_DEADZONE 1200 // 保持死区,克服静摩擦
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#define MOTOR_PWM_MAX_ARR 3599 // 定时器重装载值
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/* 电机位置定义 (基于用户规定) */
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#define MOTOR_LR MOTOR_1 // 左后 (Left Rear)
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#define MOTOR_LF MOTOR_2 // 左前 (Left Front)
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#define MOTOR_RF MOTOR_3 // 右前 (Right Front)
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#define MOTOR_RR MOTOR_4 // 右后 (Right Rear)
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/* 运动解算临时变量 (RPM 单位) */
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static float target_v_x = 0; // 前进后退分量 (-TARGET_MAX_RPM ~ TARGET_MAX_RPM)
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static float target_v_y = 0; // 左右横移分量
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static float target_v_w = 0; // 原地旋转分量
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static uint8_t car_running = 0; // 小车运行状态(1=运行,0=停止)
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static uint8_t car_speed_percent = 0; // 当前整体速度百分比(0~100)
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static uint16_t car_target_station = 0; // 目标站点编号
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/* 4个电机的 PID 控制器 */
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static PID_TypeDef motor_pid[MOTOR_COUNT];
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/**
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* @brief 初始化闭环控制系统
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*/
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void CarCtrl_InitClosedLoop(void)
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{
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for(int i=0; i<MOTOR_COUNT; i++) {
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// 恢复较高的积分限幅(2500)。要想达到稳态,单靠积分项必须能填补:3599(满载) - 1200(死区) = 2399 的差距。
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pid_init(&motor_pid[i], MOTOR_KP, MOTOR_KI, MOTOR_KD, (float)MOTOR_PWM_MAX_ARR, 2500.0f);
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}
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}
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/**
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* @brief 百分比转PWM值
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* @param percent 速度百分比(0~100)
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* @return int16_t PWM占空比
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*/
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static int16_t CarCtrl_PercentToPwm(uint8_t percent)
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{
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if (percent > 100U) {
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percent = 100U;
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}
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return (int16_t)((CAR_PWM_MAX * percent) / 100U);
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}
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/**
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* @brief 停止所有电机
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*/
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static void CarCtrl_StopAll(void)
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{
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for(int i=0; i<MOTOR_COUNT; i++) {
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motor_stop(i);
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pid_reset(&motor_pid[i]);
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}
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}
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/**
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* @brief 按当前 car_speed_percent 设置所有电机速度
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*/
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static void CarCtrl_ApplySpeed(void)
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{
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int16_t pwm = CarCtrl_PercentToPwm(car_speed_percent);
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motor_set_speed(MOTOR_1, pwm);
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motor_set_speed(MOTOR_2, pwm);
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motor_set_speed(MOTOR_3, pwm);
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motor_set_speed(MOTOR_4, pwm);
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}
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/**
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* @brief 执行一步 PID 闭环计算并更新电机 (建议 10ms-20ms 调用一次)
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*/
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void CarCtrl_UpdateClosedLoop(void)
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{
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if (!car_running) {
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CarCtrl_StopAll();
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return;
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}
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/* 麦克纳姆轮运动解算 (RPM单位)
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* 根据你的电机位置规定:
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* LR: M1, LF: M2, RF: M3, RR: M4
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*/
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float target_rpms[MOTOR_COUNT];
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// 从前进速度分量计算基础速度
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target_v_x = (float)car_speed_percent * TARGET_MAX_RPM / 100.0f;
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// 麦轮全向解算公式:
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// LF = Vx + Vy - Vw
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// RF = Vx - Vy + Vw
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// LR = Vx - Vy - Vw
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// RR = Vx + Vy + Vw
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target_rpms[MOTOR_LF] = target_v_x + target_v_y - target_v_w; // 左前
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target_rpms[MOTOR_RF] = target_v_x - target_v_y + target_v_w; // 右前
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target_rpms[MOTOR_LR] = target_v_x - target_v_y - target_v_w; // 左后
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target_rpms[MOTOR_RR] = target_v_x + target_v_y + target_v_w; // 右后
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for(int i=0; i<MOTOR_COUNT; i++) {
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float actual_rpm = hall_get_speed(i);
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// 限幅目标值,防止叠加后超出物理极限
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if (target_rpms[i] > TARGET_MAX_RPM) target_rpms[i] = TARGET_MAX_RPM;
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if (target_rpms[i] < -TARGET_MAX_RPM) target_rpms[i] = -TARGET_MAX_RPM;
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float pid_out = pid_calculate(&motor_pid[i], target_rpms[i], actual_rpm);
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// 优化死区逻辑:当目标速度不为0时,叠加死区偏移
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float final_pwm = 0;
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if (target_rpms[i] > 1.0f || target_rpms[i] < -1.0f) {
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if (pid_out >= 0) {
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final_pwm = pid_out + MOTOR_PWM_DEADZONE;
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} else {
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final_pwm = pid_out - MOTOR_PWM_DEADZONE;
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}
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// 最终限幅,防止总 PWM 超过 ARR (3599)
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if (final_pwm > 3599) final_pwm = 3599;
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if (final_pwm < -3599) final_pwm = -3599;
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}
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motor_set_speed(i, (int16_t)final_pwm);
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// 修改打印逻辑:使用位置别名让日志更易读
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const char* motor_names[] = {"LR", "LF", "RF", "RR"};
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static uint32_t last_log_time = 0;
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if (HAL_GetTick() - last_log_time > 500) {
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elog_d(Protocol_TAG, "M[%s] T:%.1f A:%.1f Pw:%d",
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motor_names[i], target_rpms[i], actual_rpm, (int16_t)final_pwm);
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if (i == MOTOR_COUNT - 1) last_log_time = HAL_GetTick();
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}
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}
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}
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/**
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* @brief 解析并执行协议命令
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* @param cmd_payload 队列传入的命令字符串(如 "ST:RUN"、"SP:080"、"GS:005")
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*/
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static void CarCtrl_HandleCommand(const char *cmd_payload)
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{
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const char *arg = NULL;
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if (cmd_payload == NULL || cmd_payload[0] == '\0') {
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return;
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}
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// 查找冒号分隔符,分割命令类型和参数
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arg = strchr(cmd_payload, ':');
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if (arg == NULL) {
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elog_w(Protocol_TAG, "未知控制指令: %s", cmd_payload);
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return;
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}
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// 启动/停止命令(仅作为自动循迹任务的启动/暂停信号,不直接控制电机)
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if (strncmp(cmd_payload, "ST", 2) == 0) {
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if (strcmp(arg + 1, "RUN") == 0) {
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car_running = 1;
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elog_i(Protocol_TAG, "小车自动循迹启动, speed=%u%%, station=%u", car_speed_percent,
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car_target_station);
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} else if (strcmp(arg + 1, "STOP") == 0) {
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car_running = 0;
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elog_i(Protocol_TAG, "小车自动循迹暂停");
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} else {
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elog_w(Protocol_TAG, "未知启动/停止命令: %s", cmd_payload);
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}
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return;
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}
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// 设置整体速度命令
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if (strncmp(cmd_payload, "SP", 2) == 0) {
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unsigned int speed = 0;
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// 解析速度参数(百分比,0~100)
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if (sscanf(arg + 1, "%u", &speed) == 1) {
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if (speed > 100U) {
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speed = 100U;
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}
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car_speed_percent = (uint8_t)speed;
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elog_i(Protocol_TAG, "设置整体速度: %u%%", car_speed_percent);
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// 如果当前处于运行状态,立即生效
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if (car_running != 0U) {
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CarCtrl_ApplySpeed();
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}
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} else {
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elog_w(Protocol_TAG, "速度参数解析失败: %s", cmd_payload);
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}
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return;
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}
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// 设置目标站点命令
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if (strncmp(cmd_payload, "GS", 2) == 0) {
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unsigned int station = 0;
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// 解析站点编号(0~999)
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if (sscanf(arg + 1, "%u", &station) == 1) {
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if (station > 999U) {
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station = 999U;
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}
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car_target_station = (uint16_t)station;
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elog_i(Protocol_TAG, "设置目标站点: %03u", car_target_station);
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} else {
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elog_w(Protocol_TAG, "站点参数解析失败: %s", cmd_payload);
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}
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return;
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}
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// 未知命令类型
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elog_w(Protocol_TAG, "未支持的控制命令: %s", cmd_payload);
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}
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/* 引用在 freertos.c 中定义的消息队列句柄 */
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extern osMessageQueueId_t CmdQueueHandle;
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/**
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* @brief 协议处理函数
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* @details 严格按照协议文档:校验范围 = 帧头 + 命令 + 数据
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* 即从下标 0 开始,一直加到最后一个冒号之前
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*/
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void Protocol_HandleMessage(uint8_t *data, uint16_t len) {
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if (data == NULL)
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return;
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// 1. 基础检查:长度必须足够,且必须以 '#' 结尾
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if (len < 10 || data[len - 1] != '#') {
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elog_w(Protocol_TAG, "协议错误:长度不足或帧尾错误 (len: %d)", len);
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return;
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}
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// 2. 寻找校验位前的分隔符
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// 协议格式:LOGI:CMD:DATA:CS#
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// 我们需要找到最后一个冒号 ':' 的位置,它前面是数据,后面是校验位
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int last_colon_pos = -1;
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for (int i = 0; i < len; i++) {
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if (data[i] == ':') {
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last_colon_pos = i;
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}
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}
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// 如果找不到冒号,说明格式错误
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if (last_colon_pos == -1 || last_colon_pos < 5) {
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elog_w(Protocol_TAG, "协议错误:找不到分隔符 ':' 或位置非法");
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return;
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}
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// 3. 提取接收到的校验位 (从 ASCII 转为 Hex 数值)
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// 校验位紧跟在 last_colon_pos 之后,长度为 2 字节
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char recv_cs_hex_str[3] = {0};
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// 防止越界
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if (last_colon_pos + 3 >= len) {
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elog_w(Protocol_TAG, "协议错误:校验位数据越界");
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return;
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}
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recv_cs_hex_str[0] = data[last_colon_pos + 1];
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recv_cs_hex_str[1] = data[last_colon_pos + 2];
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unsigned int received_checksum = 0;
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sscanf(recv_cs_hex_str, "%02X", &received_checksum);
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// 4. 计算本地校验和
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// 【核心修改点】
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// 严格按照协议文档:从下标 0 开始,长度为 last_colon_pos
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// 也就是计算 "LOGI:SP:080" 的累加和
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uint8_t calculated_checksum =
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Calculate_CheckSum(data, 0, (uint16_t)last_colon_pos);
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// 5. 对比校验和
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if (calculated_checksum == (uint8_t)received_checksum) {
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elog_i(Protocol_TAG, "✅ 校验通过!执行指令: %s", (char *)data);
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/* 提取有效载荷发送到消息队列 */
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char cmd_payload[16] = {0};
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// 将 "LOGI:" 之后到最后一个冒号之前的内容作为指令
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uint16_t payload_len = last_colon_pos - 5;
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uint16_t copy_len = (payload_len > 15) ? 15 : payload_len;
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if (copy_len > 0) {
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memcpy(cmd_payload, &data[5], copy_len);
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}
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osStatus_t status = osMessageQueuePut(CmdQueueHandle, cmd_payload, 0, 0);
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if (status != osOK) {
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elog_e(Protocol_TAG, "Protocol: Queue put failed: %d", status);
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}
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} else {
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elog_w(Protocol_TAG, "❌ 校验失败!计算值: 0x%02X, 接收值: 0x%02X",
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calculated_checksum, (uint8_t)received_checksum);
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// 辅助调试:打印实际参与计算的数据段
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char debug_buf[32] = {0};
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if (last_colon_pos < 32) {
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memcpy(debug_buf, data, last_colon_pos);
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elog_i(Protocol_TAG, " -> 单片机正在计算这段数据的校验和: [%s]",
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debug_buf);
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elog_i(Protocol_TAG, " -> 请检查上位机是否也是按照此范围计算累加和");
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}
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}
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}
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#define CarCtrlTask_TAG "CarCtrlTask"
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void CarCtrl_Task(void *argument) {
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/* USER CODE BEGIN CarCtrl_Task */
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char cmd_payload[16] = {0};
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/* 初始化闭环 PID 控制器 */
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CarCtrl_InitClosedLoop();
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/* Infinite loop */
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for (;;) {
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/* 1. 处理控制指令 (非阻塞获取,如果没有指令则继续执行闭环) */
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if (osMessageQueueGet(CmdQueueHandle, cmd_payload, NULL, 0) == osOK) {
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elog_d(CarCtrlTask_TAG, "CarCtrl: Command %s", cmd_payload);
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CarCtrl_HandleCommand(cmd_payload);
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}
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/* 2. 执行 PID 闭环控制更新 */
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CarCtrl_UpdateClosedLoop();
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/*
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* 与 hall_update_speed() 的 100ms 采样周期对齐,避免 PID 使用过期速度反复修正。
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* 如果后续把测速周期改成 20ms,这里也要同步改回 20ms。
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*/
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osDelay(100);
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}
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/* USER CODE END CarCtrl_Task */
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} |