基于stm32的智能小车

一、功能实现

二、硬件清单

三、代码实现

1.先让小车动起来

2.串口控制小车行动

3.点动控制小车

4.硬件pwm调速

5. 左右轮各自调速

6. 循迹小车

7. 解决转弯平滑问题

8. 跟随小车

9. 摇头避障小车

9.1封装摇头功能

9.2封装超声波

9.3 封装电机驱动

10.小车测速实现

11. 串口控制小车并使用Oled显示速度

12. Wi-Fi测速小车并本地Oled显示

13. 语音控制小车

一、功能实现

左右转与前进后退：通过控制左组轮和右组轮的配合实现。pwm调速使其更平滑

循迹功能：基于光电传感器原理，通过判断黑线和白线来决定左转或者右转

跟随功能：通过超声波测出小车和跟随物的距离决定移动方向

避障功能：通过超声波检测出前方障碍物，做出改变方向的决定

语音模块控制：多种语音改变多种引脚的电平，通过语音控制实现以上多种功能的切换

old屏显示速度：将测速模块的数据通过oled屏显示

二、硬件清单

1.stm32f103(其他型号也行)板子

2.智能小车底盘、电机马达

3.电池盒和电池

4.超声波模块

5.sg90舵机模块

(黄pwm 红vcc 灰gnd)

6.old屏

7.测速模块

8.红外模块

9.esp8266

10.语音识别模块

三、代码实现

1.先让小车动起来

电机接线：B-1A -- PB0 B-1B -- PB1 A-1A -- PB2 A-1B -- PB10

motor.c

#include "motor.h"
void goForward(void)//前进
{// 左轮HAL_GPIO_WritePin(GPIOB, GPIO_PIN_2, GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_10, GPIO_PIN_RESET);// 右轮HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET);
}
void goBack(void)后退
{// 左轮HAL_GPIO_WritePin(GPIOB, GPIO_PIN_2, GPIO_PIN_RESET);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_10, GPIO_PIN_SET);// 右轮HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_RESET);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_SET);
}
void goLeft(void)//左转
{// 左轮HAL_GPIO_WritePin(GPIOB, GPIO_PIN_2, GPIO_PIN_RESET);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_10, GPIO_PIN_RESET);// 右轮HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET);
}
void goRight(void)//右转
{// 左轮HAL_GPIO_WritePin(GPIOB, GPIO_PIN_2, GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_10, GPIO_PIN_RESET);// 右轮HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_RESET);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET);
}
void stop(void)//停止
{// 左轮HAL_GPIO_WritePin(GPIOB, GPIO_PIN_2, GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_10, GPIO_PIN_SET);// 右轮HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_RESET);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET);
}

motor.h

#ifndef __MOTOR_H__
#define __MOTOR_H__
#include "main.h"
void goForward(void);
void goBack(void);
void goLeft(void);
void goRight(void);
void stop(void);
#endif

main.c

#include "motor.h"//main函数的while循环部分：
while (1)
{/* USER CODE END WHILE */goForward();HAL_Delay(1000);goBack();HAL_Delay(1000);goLeft();HAL_Delay(1000);goRight();HAL_Delay(1000);stop();HAL_Delay(1000);/* USER CODE BEGIN 3 */
}

2.串口控制小车行动

usart.c

#include "string.h"
#include "stdio.h"
#include "motor.h"//串口接收缓存（1字节）
uint8_t buf=0;//定义最大接收字节数 200，可根据需求调整
#define UART1_REC_LEN 200// 接收缓冲, 串口接收到的数据放在这个数组里，最大UART1_REC_LEN个字节
uint8_t UART1_RX_Buffer[UART1_REC_LEN];// 接收状态
// bit15， 接收完成标志
// bit14， 接收到0x0d
// bit13~0， 接收到的有效字节数目
uint16_t UART1_RX_STA=0;
#define SIZE 12
char buffer[SIZE];// 接收完成回调函数，收到一个数据后，在这里处理
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{//判断中断由哪个串口触发if(huart->Instance == USART1){//判断接收是否完成（UART1_RX_STA bit15 位是否为1）if((UART1_RX_STA & 0x8000) == 0){//如果已经收到了 0x0d （回车），if(UART1_RX_STA & 0x4000){//判断是否收到 0x0a （换行）if(buf == 0x0a){//如果 0x0a和0x0d都收到，则将bit15位置为1UART1_RX_STA |= 0x8000;if(!strcmp(UART1_RX_Buffer, "M1"))goForward();else if(!strcmp(UART1_RX_Buffer, "M2"))goBack();else if(!strcmp(UART1_RX_Buffer, "M3"))goLeft();else if(!strcmp(UART1_RX_Buffer, "M4"))goRight();elsestop();memset(UART1_RX_Buffer, 0, UART1_REC_LEN);UART1_RX_STA = 0;}else//否则认为接收错误，重新开始UART1_RX_STA = 0;}else // 如果没有收到了 0x0d （回车）            {//则先判断收到的这个字符是否是 0x0d （回车）if(buf == 0x0d){//是的话则将 bit14 位置为1UART1_RX_STA |= 0x4000;}else{//否则将接收到的数据保存在缓存数组里UART1_RX_Buffer[UART1_RX_STA & 0X3FFF] = buf;UART1_RX_STA++;//如果接收数据大于UART1_REC_LEN（200字节），则重新开始接收if(UART1_RX_STA > UART1_REC_LEN - 1)UART1_RX_STA = 0;}}}//重新开启中断HAL_UART_Receive_IT(&huart1, &buf, 1);}
}
int fputc(int ch, FILE *f)
{unsigned char temp[1]={ch};HAL_UART_Transmit(&huart1,temp,1,0xffff);return ch;
}

main.c

#include "motor.h"
extern uint8_t buf;
//main函数
HAL_UART_Receive_IT(&huart1, &buf, 1);

3.点动控制小车

usart.c

if (!strcmp(UART1_RX_Buffer, "M1"))
{goForward();HAL_Delay(10);
}
else if (!strcmp(UART1_RX_Buffer, "M2"))
{goBack();HAL_Delay(10);
}
else if (!strcmp(UART1_RX_Buffer, "M3"))
{goLeft();HAL_Delay(10);
}
else if (!strcmp(UART1_RX_Buffer, "M4"))
{goRight();HAL_Delay(10);
}
elsestop();

main.c

HAL_NVIC_SetPriority(SysTick_IRQn,0,0); //或者通过cubeMX配置
while(1)
{stop();
}

4.硬件pwm调速

cubeMX 配置

根据公式配置psc和arr

代码实现

main.c

// main函数里
HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_2);
while (1)
{__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1, 8);__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_2, 8);HAL_Delay(1000);__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1, 10);__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_2, 10);HAL_Delay(1000);__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1, 15);__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_2, 15);HAL_Delay(1000);
}

5. 左右轮各自调速

代码实现

// main函数里
while (1)
{__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1,8);__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_2,15);HAL_Delay(1000);__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1,15);__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_2,8);HAL_Delay(1000);
}

6. 循迹小车

循迹模块（左） -- PB3 循迹模块（右） -- PB4

代码实现

#define LeftWheel_Value HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_3)
#define RightWheel_Value HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_4)
// main函数里
while (1)
{if (LeftWheel_Value == GPIO_PIN_RESET && RightWheel_Value == GPIO_PIN_RESET)goForward();if (LeftWheel_Value == GPIO_PIN_SET && RightWheel_Value == GPIO_PIN_RESET)goLeft();if (LeftWheel_Value == GPIO_PIN_RESET && RightWheel_Value == GPIO_PIN_SET)goRight();if (LeftWheel_Value == GPIO_PIN_SET && RightWheel_Value == GPIO_PIN_SET)stop();
}

7. 解决转弯平滑问题

代码实现

#define LeftWheel_Value HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_3)
#define RightWheel_Value HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_4)
// main函数里
while (1)
{if(LeftWheel_Value == GPIO_PIN_RESET && RightWheel_Value == GPIO_PIN_RESET){__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1,19);__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_2,19);}if(LeftWheel_Value == GPIO_PIN_SET && RightWheel_Value == GPIO_PIN_RESET){__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1,15);__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_2,8);}if(LeftWheel_Value == GPIO_PIN_RESET && RightWheel_Value == GPIO_PIN_SET){__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1,8);__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_2,15);}if(LeftWheel_Value == GPIO_PIN_SET && RightWheel_Value == GPIO_PIN_SET){__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1,0);__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_2,0);}
}

8. 跟随小车

跟随模块（左） -- PB5 跟随模块（右） -- PB6

代码实现

#define LeftWheel_Value HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_5)
#define RightWheel_Value HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_6)
// main函数里
while (1)
{if(LeftWheel_Value == GPIO_PIN_RESET && RightWheel_Value == GPIO_PIN_RESET)goForward();if(LeftWheel_Value == GPIO_PIN_SET && RightWheel_Value == GPIO_PIN_RESET)goRight();if(LeftWheel_Value == GPIO_PIN_RESET && RightWheel_Value == GPIO_PIN_SET)goLeft();if(LeftWheel_Value == GPIO_PIN_SET && RightWheel_Value == GPIO_PIN_SET)stop();
}

9. 摇头避障小车

9.1封装摇头功能

舵机接线：sg90 -- PB9

sg90.c

#include "sg90.h"
#include "gpio.h"
#include "tim.h"void initSG90(void)//初始化90度
{HAL_TIM_PWM_Start(&htim4,TIM_CHANNEL_4); //启动定时器4__HAL_TIM_SetCompare(&htim4, TIM_CHANNEL_4, 17); //将舵机置为90度
}void sgMiddle(void)
{__HAL_TIM_SetCompare(&htim4, TIM_CHANNEL_4, 17); //将舵机置为90度
}void sgRight(void)
{__HAL_TIM_SetCompare(&htim4, TIM_CHANNEL_4, 5); //将舵机置为0度
}void sgLeft(void)
{__HAL_TIM_SetCompare(&htim4, TIM_CHANNEL_4, 25); //将舵机置为180度
}

sg90.h

#ifndef __SG90_H__
#define __SG90_H__void initSG90(void);
void sgMiddle(void);
void sgRight(void);
void sgLeft(void);#endif

main.c

initSG90();HAL_Delay(1000);while (1)
{sgLeft();HAL_Delay(1000);sgMiddle();HAL_Delay(1000);sgRight();HAL_Delay(1000);sgMiddle();HAL_Delay(1000);
}

9.2封装超声波

超声波接线 Trig -- PB7 Echo -- PB8

cubeMX 配置

代码实现

sr04.c

#include "sr04.h"
#include "gpio.h"
#include "tim.h"
//使用TIM2来做us级延时函数
void TIM2_Delay_us(uint16_t n_us)
{/* 使能定时器2计数 */__HAL_TIM_ENABLE(&htim2);__HAL_TIM_SetCounter(&htim2, 0);while(__HAL_TIM_GetCounter(&htim2) < ((1 * n_us)-1) );/* 关闭定时器2计数 */__HAL_TIM_DISABLE(&htim2);
}
double get_distance(void)
{int cnt=0;//1. Trig ，给Trig端口至少10us的高电平HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7, GPIO_PIN_SET);//拉高TIM2_Delay_us(20);HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7, GPIO_PIN_RESET);//拉低//2. echo由低电平跳转到高电平，表示开始发送波//波发出去的那一下，开始启动定时器while(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_8) == GPIO_PIN_RESET);//等待输入电平拉高HAL_TIM_Base_Start(&htim2);__HAL_TIM_SetCounter(&htim2,0);//3. 由高电平跳转回低电平，表示波回来了while(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_8) == GPIO_PIN_SET);//等待输入电平变低//波回来的那一下，我们开始停止定时器HAL_TIM_Base_Stop(&htim2);//4. 计算出中间经过多少时间cnt = __HAL_TIM_GetCounter(&htim2);//5. 距离 = 速度 （340m/s）* 时间/2（计数1次表示1us）return (cnt*340/2*0.000001*100); //单位：cm
}

sr04.h

#ifndef __SR04_H__
#define __SR04_H__double get_distance(void);#endif

main.c

while (1)
{if(dir != MIDDLE){sgMiddle();dir = MIDDLE;HAL_Delay(300);}disMiddle = get_distance();if(disMiddle > 35){//前进}else{//停止//测左边距离sgLeft();HAL_Delay(300);disLeft = get_distance();sgMiddle();HAL_Delay(300);sgRight();dir = RIGHT;HAL_Delay(300);disRight = get_distance();}
}

9.3 封装电机驱动

硬件接线与1一样： B-1A -- PB0 B-1B -- PB1 A-1A -- PB2 A-1B -- PB10

代码实现

while (1)
{/* USER CODE END WHILE *//* USER CODE BEGIN 3 */if(dir != MIDDLE){sgMiddle();dir = MIDDLE;HAL_Delay(300);}disMiddle = get_distance();if(disMiddle > 35){//前进goForward();}else if(disMiddle < 10){goBack();}else{//停止stop();//测左边距离sgLeft();HAL_Delay(300);disLeft = get_distance();sgMiddle();HAL_Delay(300);sgRight();dir = RIGHT;HAL_Delay(300);disRight = get_distance();if(disLeft < disRight){goRight();HAL_Delay(150);stop();}if(disRight < disLeft){goLeft();HAL_Delay(150);stop();}}HAL_Delay(50);
}

10.小车测速实现

硬件接线测速模块： VCC -- 3.3V 不能接5V，否则遮挡一次会触发 3 次中断 OUT -- PB14

cubeMX 配置

代码实现

unsigned int speedCnt;
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{if (GPIO_Pin == GPIO_PIN_14)if (HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_14) == GPIO_PIN_RESET)speedCnt++;
}
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{printf("speed: %d\r\n", speedCnt);speedCnt = 0;
}
main函数里：
HAL_TIM_Base_Start_IT(&htim2);

11. 串口控制小车并使用Oled显示速度

硬件接线 SCL -- PB6 SDA -- PB7

封装 Oled 模块

代码实现

oled.c

#include "oled.h"
#include "i2c.h"
#include "oledfont.h"void Oled_Write_Cmd(uint8_t dataCmd)
{HAL_I2C_Mem_Write(&hi2c1, 0x78, 0x00, I2C_MEMADD_SIZE_8BIT,&dataCmd, 1, 0xff);
}void Oled_Write_Data(uint8_t dataData)
{HAL_I2C_Mem_Write(&hi2c1, 0x78, 0x40, I2C_MEMADD_SIZE_8BIT,&dataData, 1, 0xff);
}void Oled_Init(void){Oled_Write_Cmd(0xAE);//--display offOled_Write_Cmd(0x00);//---set low column addressOled_Write_Cmd(0x10);//---set high column addressOled_Write_Cmd(0x40);//--set start line address  Oled_Write_Cmd(0xB0);//--set page addressOled_Write_Cmd(0x81); // contract controlOled_Write_Cmd(0xFF);//--128   Oled_Write_Cmd(0xA1);//set segment remap Oled_Write_Cmd(0xA6);//--normal / reverseOled_Write_Cmd(0xA8);//--set multiplex ratio(1 to 64)Oled_Write_Cmd(0x3F);//--1/32 dutyOled_Write_Cmd(0xC8);//Com scan directionOled_Write_Cmd(0xD3);//-set display offsetOled_Write_Cmd(0x00);//Oled_Write_Cmd(0xD5);//set osc divisionOled_Write_Cmd(0x80);//Oled_Write_Cmd(0xD8);//set area color mode offOled_Write_Cmd(0x05);//Oled_Write_Cmd(0xD9);//Set Pre-Charge PeriodOled_Write_Cmd(0xF1);//Oled_Write_Cmd(0xDA);//set com pin configuartionOled_Write_Cmd(0x12);//Oled_Write_Cmd(0xDB);//set VcomhOled_Write_Cmd(0x30);//Oled_Write_Cmd(0x8D);//set charge pump enableOled_Write_Cmd(0x14);//Oled_Write_Cmd(0xAF);//--turn on oled panel
}void Oled_Screen_Clear(void){char i,n;Oled_Write_Cmd (0x20);                    //set memory addressing modeOled_Write_Cmd (0x02);                    //page addressing modefor(i=0;i<8;i++){Oled_Write_Cmd(0xb0+i);               //éè??ò3μ??·￡¨0~7￡?Oled_Write_Cmd(0x00);                 //éè????ê??????aáDμíμ??·Oled_Write_Cmd(0x10);                 //éè????ê??????aáD??μ??·   for(n=0;n<128;n++)Oled_Write_Data(0x00);           }
}void Oled_Show_Char(char row,char col,char oledChar){ //row*2-2unsigned int  i;Oled_Write_Cmd(0xb0+(row*2-2));                           //page 0Oled_Write_Cmd(0x00+(col&0x0f));                          //lowOled_Write_Cmd(0x10+(col>>4));                            //high  for(i=((oledChar-32)*16);i<((oledChar-32)*16+8);i++){Oled_Write_Data(F8X16[i]);                            //写数据oledTable1}Oled_Write_Cmd(0xb0+(row*2-1));                           //page 1Oled_Write_Cmd(0x00+(col&0x0f));                          //lowOled_Write_Cmd(0x10+(col>>4));                            //highfor(i=((oledChar-32)*16+8);i<((oledChar-32)*16+8+8);i++){Oled_Write_Data(F8X16[i]);                            //写数据oledTable1}
}/******************************************************************************/
// 函数名称：Oled_Show_Char
// 输入参数：oledChar
// 输出参数：无
// 函数功能：OLED显示单个字符
/******************************************************************************/
void Oled_Show_Str(char row,char col,char *str){while(*str!=0){Oled_Show_Char(row,col,*str);str++;col += 8;    }
}

oled显示速度

代码实现

extern uint8_t buf;
unsigned int speedCnt = 0;
char speedMes[24];  //主程序发送速度数据的字符串缓冲区void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{if (GPIO_Pin == GPIO_PIN_14)if (HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_14) == GPIO_PIN_RESET)speedCnt++;
}void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{printf("speed: %d\r\n", speedCnt);sprintf(speedMes,"speed:%2d cm/s",speedCnt);//串口数据的字符串拼装，speed是格子，每个格子1cmOled_Show_Str(2,2,speedMes);speedCnt = 0;
}

12. Wi-Fi测速小车并本地Oled显示

硬件接线把esp8266插进串口 1

代码实现

main.c

#define MIDDLE 0
#define LEFT 1
#define RIGHT 2#define BZ 1
#define XJ 2
#define GS 3#define LeftWheel_Value_XJ HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_3)
#define RightWheel_Value_XJ HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_4)#define LeftWheel_Value_GS HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_8)
#define RightWheel_Value_GS HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_9)#define A25 HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_15)
#define A26 HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_13)
#define A27 HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_14)char dir;void xunjiMode()
{if(LeftWheel_Value_XJ == GPIO_PIN_RESET && RightWheel_Value_XJ == GPIO_PIN_RESET)goForward();if(LeftWheel_Value_XJ == GPIO_PIN_SET && RightWheel_Value_XJ == GPIO_PIN_RESET)goLeft();if(LeftWheel_Value_XJ == GPIO_PIN_RESET && RightWheel_Value_XJ == GPIO_PIN_SET)goRight();if(LeftWheel_Value_XJ == GPIO_PIN_SET && RightWheel_Value_XJ == GPIO_PIN_SET)stop();
}void gensuiMode()
{if(LeftWheel_Value_GS == GPIO_PIN_RESET && RightWheel_Value_GS == GPIO_PIN_RESET)goForward();if(LeftWheel_Value_GS == GPIO_PIN_SET && RightWheel_Value_GS == GPIO_PIN_RESET)goRight();if(LeftWheel_Value_GS == GPIO_PIN_RESET && RightWheel_Value_GS == GPIO_PIN_SET)goLeft();if(LeftWheel_Value_GS == GPIO_PIN_SET && RightWheel_Value_GS == GPIO_PIN_SET)stop();
}void bizhangMode()
{double disMiddle;double disLeft;double disRight;if(dir != MIDDLE){sgMiddle();dir = MIDDLE;HAL_Delay(300);}disMiddle = get_distance();if(disMiddle > 35){//前进goForward();}else if(disMiddle < 10){goBack();}else{//停止stop();//测左边距离sgLeft();HAL_Delay(300);disLeft = get_distance();sgMiddle();HAL_Delay(300);sgRight();dir = RIGHT;HAL_Delay(300);disRight = get_distance();if(disLeft < disRight){goRight();HAL_Delay(150);stop();}if(disRight < disLeft){goLeft();HAL_Delay(150);stop();}}HAL_Delay(50);
}//main部分MX_GPIO_Init();MX_TIM4_Init();MX_TIM2_Init();MX_I2C1_Init();initSG90();HAL_Delay(1000);dir = MIDDLE;Oled_Init();Oled_Screen_Clear();Oled_Show_Str(2,2,"-----Ready----");while (1){//满足寻迹模式的条件if(A25 == 1 && A26 == 1 && A27 == 0){if(mark != XJ){Oled_Screen_Clear();Oled_Show_Str(2,2,"-----XunJi----");}mark = XJ;xunjiMode();}//满足跟随模式的条件if(A25 == 0 && A26 == 1 && A27 == 1){if(mark != GS){Oled_Screen_Clear();Oled_Show_Str(2,2,"-----GenSui----");}mark = GS;gensuiMode();}//满足避障模式的条件if(A25 == 1 && A26 == 0 && A27 == 1){if(mark != BZ){Oled_Screen_Clear();Oled_Show_Str(2,2,"-----BiZhang----");}mark = BZ;bizhangMode();}}
}

13. 语音控制小车

语音模块硬件接线 A25 -- PA15 （跟随） A26 -- PA13 （避障） A27 -- PA14 （循迹）

cubeMX配置

代码实现

#include "sg90.h"
#include "sr04.h"
#include "motor.h"
#include "oled.h"
#include "string.h"
#define MIDDLE 0
#define LEFT 1
#define RIGHT 2
#define BZ 1
#define XJ 2
#define GS 3
#define LeftWheel_Value_XJ HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_3)
#define RightWheel_Value_XJ HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_4)
#define LeftWheel_Value_GS HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_8)
#define RightWheel_Value_GS HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_9)
#define XJ_VALUE HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_14)
#define GS_VALUE HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_15)
#define BZ_VALUE HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_13)
char dir;
void xunjiMode()
{if(LeftWheel_Value_XJ == GPIO_PIN_RESET && RightWheel_Value_XJ == GPIO_PIN_RESET)goForward();if(LeftWheel_Value_XJ == GPIO_PIN_SET && RightWheel_Value_XJ == GPIO_PIN_RESET)goLeft();if(LeftWheel_Value_XJ == GPIO_PIN_RESET && RightWheel_Value_XJ == GPIO_PIN_SET)goRight();if(LeftWheel_Value_XJ == GPIO_PIN_SET && RightWheel_Value_XJ == GPIO_PIN_SET)stop();
}
void gensuiMode()
{if(LeftWheel_Value_GS == GPIO_PIN_RESET && RightWheel_Value_GS == GPIO_PIN_RESET)goForward();if(LeftWheel_Value_GS == GPIO_PIN_SET && RightWheel_Value_GS == GPIO_PIN_RESET)goRight();if(LeftWheel_Value_GS == GPIO_PIN_RESET && RightWheel_Value_GS == GPIO_PIN_SET)goLeft();if(LeftWheel_Value_GS == GPIO_PIN_SET && RightWheel_Value_GS == GPIO_PIN_SET)stop();
}
void bizhangMode()
{double disMiddle;double disLeft;double disRight;if(dir != MIDDLE){sgMiddle();dir = MIDDLE;HAL_Delay(300);}disMiddle = get_distance();if(disMiddle > 35){//前进goForward();}else if(disMiddle < 10){goBack();}else{//停止stop();//测左边距离sgLeft();HAL_Delay(300);disLeft = get_distance();sgMiddle();HAL_Delay(300);sgRight();dir = RIGHT;HAL_Delay(300);disRight = get_distance();if(disLeft < disRight){goRight();HAL_Delay(150);stop();}if(disRight < disLeft){goLeft();HAL_Delay(150);stop();}}HAL_Delay(50);
}
int main(void)
{int mark = 0;HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_TIM4_Init();MX_TIM2_Init();MX_I2C1_Init();initSG90();HAL_Delay(1000);dir = MIDDLE;Oled_Init();Oled_Screen_Clear();Oled_Show_Str(2,2,"-----Ready----");while (1){if(XJ_VALUE == GPIO_PIN_RESET && GS_VALUE == GPIO_PIN_SET && BZ_VALUE ==GPIO_PIN_SET){if(mark != XJ){Oled_Screen_Clear();Oled_Show_Str(2,2,"-----XunJi----");}mark = XJ;xunjiMode();}//满足循迹模式的条件if(XJ_VALUE == GPIO_PIN_SET && GS_VALUE == GPIO_PIN_RESET && BZ_VALUE ==GPIO_PIN_SET){if(mark != GS){Oled_Screen_Clear();Oled_Show_Str(2,2,"-----GenSui----");}mark = GS;gensuiMode();}//满足避障模式的条件if(XJ_VALUE == GPIO_PIN_SET && GS_VALUE == GPIO_PIN_SET && BZ_VALUE ==GPIO_PIN_RESET){if(mark != BZ){Oled_Screen_Clear();Oled_Show_Str(2,2,"-----BiZhang----");}mark = BZ;bizhangMode();}HAL_Delay(50);}
}