【MM32F5270开发板试用】手势传感PAJ7620U2的智能家居应用

本篇文章来自极术社区与灵动组织的MM32F5270开发板评测活动，更多开发板试用活动请关注极术社区网站。作者：风云再起

一、序

很高兴能参加极术社区联合灵动微电子组织的【灵动MM32F5270开发板试用】活动，MM32F5270 是一款搭载了安谋科技 STAR-MC1 内核的 MCU 产品，其工作频率可达 120MHz，内置多达 256KB Flash 和 192KB RAM，配置浮点运算单元（Floating Point Unit, FPU）、数字信号处理单元（Digital Signal Processing，DSP）、信号间互联矩阵 MindSwitch、可配置逻辑单元 CLU、三角函数加速单元 CORDIC 等算法加速单元，并集成了丰富的外设模块和充足的 I/O 端口。MM32F5270 相较于现有产品全面提升了性能、存储容量、总线架构和外设配置，旨在覆盖更广泛的工业、汽车和 IoT 应用。

二、PLUS-F5270开发板功能示意框图

三、产品方案设计

疫情当下，非接触性来让设备启动，应用场景越来越适应市场的需求，这次抛砖引玉，大胆地做一次尝试，一起交流学习。

四、硬件及引脚，原理图

1、手势传感PAJ7620U2

2、MM32F5270开发板使用到的引脚

五、部分核心代码：

paj7620u2_iic.h文件：

#ifndef __PAJ7620U2_IIC_H#define __PAJ7620U2_IIC_H#include "board_init.h"#define SDA_GPIO    GPIO_PIN_7#define SDA_PORT    GPIOC#define SDA_RCC     RCC_APB2Periph_GPIOB#define SCL_GPIO    GPIO_PIN_6#define SCL_PORT    GPIOC#define SCL_RCC     RCC_APB2Periph_GPIOB#define SDA_H   GPIO_WriteBit(SDA_PORT,SDA_GPIO,1u)#define SDA_L   GPIO_WriteBit(SDA_PORT,SDA_GPIO,0u)#define SDA_R   GPIO_ReadInDataBit(SDA_PORT,SDA_GPIO)#define SCL_H   GPIO_WriteBit(SCL_PORT,SCL_GPIO,1u)#define SCL_L   GPIO_WriteBit(SCL_PORT,SCL_GPIO,0u)/* * Macros. */#define APP_I2C_TARGET_ADDR  0x50u  /* I2C target device address. */#define APP_I2C_BUF_LEN  16u /* The size of I2C write and read array. */#define APP_I2C_TIMEOUT_TIME 3000u  /* Wait for the time when the status flag appears. If exceeds time, don't wait any longer and return to timeout. */#define APP_I2C_TX_LEN  8u   /* The number of tx data. */#define APP_I2C_RX_LEN  7u   /* The number of rx data. *//* * Variables. */static uint8_t app_i2c_rx_buf[APP_I2C_BUF_LEN]; /* I2C rx buffer. */static uint8_t app_i2c_tx_buf[APP_I2C_BUF_LEN]; /* I2C tx buffer. */static I2C_MasterXfer_Type app_i2c_xfer;uint8_t GS_Write_Byte(uint8_t REG_Address,uint8_t REG_data);uint8_t GS_Read_Byte(uint8_t REG_Address);uint8_t GS_Read_nByte(uint8_t REG_Address,uint16_t len,uint8_t *buf);void GS_i2c_init(void);void GS_WakeUp(void);void IIC_SpeedCtl(unsigned short speed);void SDA_SetGpioMode(uint8_t mode);void SCL_SetGpioMode(uint8_t mode);void IIC_delay(uint16_t n);void app_delay_ms(uint32_t t);void app_delay_us(uint32_t t);#endif

paj7620u2_iic.c文件：

//PAJ2670 I2C初始化void GS_i2c_init(void){     /* Setup I2C initialization values. */     I2C_Master_Init_Type i2c_init;     i2c_init.ClockFreqHz = BOARD_I2C_FREQ;     i2c_init.BaudRate = I2C_BaudRate_100K;     /* Initialize I2C master. */     I2C_InitMaster(BOARD_I2C_PORT, &i2c_init);     /* The target device address needs to be configured before enabling. */     I2C_SetTargetAddr(BOARD_I2C_PORT, APP_I2C_TARGET_ADDR);   /* Enable I2C. */     I2C_Enable(BOARD_I2C_PORT, true);   GPIO_WriteBit(SCL_PORT,SCL_GPIO,1u);     GPIO_WriteBit(SDA_PORT,SDA_GPIO,1u);     }/****************************************************************************************************************switch SDA GPIO input or output****************************************************************************************************************/void SDA_SetGpioMode(uint8_t mode){      GPIO_Init_Type gpio_init; gpio_init.Pins  = SDA_GPIO;     if(mode==1)    {     gpio_init.PinMode  = GPIO_PinMode_Out_PushPull;     gpio_init.Speed = GPIO_Speed_50MHz; } else     gpio_init.PinMode  = GPIO_PinMode_In_PullUp;    GPIO_Init(SDA_PORT, &gpio_init);    GPIO_PinAFConf(SDA_PORT, gpio_init.Pins, GPIO_AF_4);    }void SCL_SetGpioMode(uint8_t mode){      GPIO_Init_Type gpio_init; gpio_init.Pins  = SCL_GPIO;     if(mode==1)    {     gpio_init.PinMode  = GPIO_PinMode_Out_PushPull;     gpio_init.Speed = GPIO_Speed_50MHz; } else     gpio_init.PinMode  = GPIO_PinMode_In_PullUp;    GPIO_Init(SCL_PORT, &gpio_init);    GPIO_PinAFConf(SCL_PORT, gpio_init.Pins, GPIO_AF_4); }//产生IIC起始信号static void GS_IIC_Start(void){    SDA_SetGpioMode(1);    SDA_H;    SCL_H; app_delay_us(4);    SDA_L;      app_delay_us(4);    SCL_L;}//产生IIC停止信号static void GS_IIC_Stop(void){    SDA_SetGpioMode(1);//sda线输出    SCL_L;    SDA_L;      app_delay_us(4);    SCL_H;    SDA_H;      app_delay_us(4);}//等待应答信号到来//返回值：1，接收应答失败// 0，接收应答成功static uint8_t GS_IIC_Wait_Ack(void){    uint8_t ucErrTime=0;    SDA_SetGpioMode(0);  //SDA设置为输入    SDA_H;    app_delay_us(3);    SCL_H;    app_delay_us(3);    while(SDA_R)    { ucErrTime++; if(ucErrTime>250) {     GS_IIC_Stop();     return 1; }    }    SCL_L;    return 0;}//产生ACK应答static void GS_IIC_Ack(void){    SCL_L;    SDA_SetGpioMode(1);    SDA_L;      app_delay_us(3);    SCL_H;      app_delay_us(3);    SCL_L;}//不产生ACK应答     static void GS_IIC_NAck(void){    SCL_L;    SDA_SetGpioMode(1);    SDA_H; app_delay_us(2);    SCL_H; app_delay_us(2);    SCL_L;}//IIC发送一个字节//返回从机有无应答//1，有应答//0，无应答static void GS_IIC_Send_Byte(uint8_t txd){    uint8_t t;    SDA_SetGpioMode(1);    SCL_L;//拉低时钟开始数据传输    for(t=0;t>7)   SDA_H;      else   SDA_L;      txd<<=1;   app_delay_us(5);      SCL_H;   app_delay_us(5);      SCL_L;   app_delay_us(5);    }} //读1个字节，ack=1时，发送ACK，ack=0，发送nACK   static uint8_t GS_IIC_Read_Byte(uint8_t ack){    uint8_t i,receive=0;    SDA_SetGpioMode(0);//SDA设置为输入    for(i=0;i<8;i++ )    { SCL_L;     app_delay_us(4); SCL_H; receive<<=1; if(SDA_R)receive++;     app_delay_us(4);    }    if (!ack) GS_IIC_NAck();//发送nACK    else GS_IIC_Ack(); //发送ACK    return receive;}//PAJ7620U2写一个字节数据uint8_t GS_Write_Byte(uint8_t REG_Address,uint8_t REG_data){    GS_IIC_Start();    GS_IIC_Send_Byte(PAJ7620_ID);    if(GS_IIC_Wait_Ack())    { GS_IIC_Stop();//释放总线 return 1;//没应答则退出    }    GS_IIC_Send_Byte(REG_Address);    GS_IIC_Wait_Ack(); GS_IIC_Send_Byte(REG_data);    GS_IIC_Wait_Ack(); GS_IIC_Stop();    return 0;}//PAJ7620U2读一个字节数据uint8_t GS_Read_Byte(uint8_t REG_Address){    uint8_t REG_data; GS_IIC_Start();    GS_IIC_Send_Byte(PAJ7620_ID);//发写命令    if(GS_IIC_Wait_Ack())    {  GS_IIC_Stop();//释放总线  return 0;//没应答则退出    }     GS_IIC_Send_Byte(REG_Address);    GS_IIC_Wait_Ack();    GS_IIC_Start();     GS_IIC_Send_Byte(PAJ7620_ID|0x01);//发读命令    GS_IIC_Wait_Ack();    REG_data = GS_IIC_Read_Byte(0);    GS_IIC_Stop();    return REG_data;}//PAJ7620U2读n个字节数据uint8_t GS_Read_nByte(uint8_t REG_Address,uint16_t len,uint8_t *buf){    GS_IIC_Start();    GS_IIC_Send_Byte(PAJ7620_ID);//发写命令    if(GS_IIC_Wait_Ack())     { GS_IIC_Stop();//释放总线 return 1;//没应答则退出    }    GS_IIC_Send_Byte(REG_Address);    GS_IIC_Wait_Ack();    GS_IIC_Start();    GS_IIC_Send_Byte(PAJ7620_ID|0x01);//发读命令    GS_IIC_Wait_Ack();    while(len)    { if(len==1) {     *buf = GS_IIC_Read_Byte(0); } else {     *buf = GS_IIC_Read_Byte(1); } buf++; len--;    }    GS_IIC_Stop();//释放总线    return 0;    }//PAJ7620唤醒void GS_WakeUp(void){    GS_IIC_Start();    GS_IIC_Send_Byte(PAJ7620_ID);//发写命令    GS_IIC_Stop();//释放总线}

paj7620u2.c文件：

//手势识别测试void Gesture_test(void){    uint8_t i;    uint8_t status;    uint8_t key;    uint8_t data[2]={0x00};    uint16_t gesture_data;    uint8_t ledflash=0; paj7620u2_selectBank(BANK0);//进入BANK0寄存器区域    for(i=0;i<GESTURE_SIZE;i++)    { GS_Write_Byte(gesture_arry[i][0],gesture_arry[i][1]);//手势识别模式初始化    }    paj7620u2_selectBank(BANK0);//切换回BANK0寄存器区域    i=0;    printf("---  Gesture show  ---\r\n");    while(1)    { status = GS_Read_nByte(PAJ_GET_INT_FLAG1,2,&data[0]);//读取手势状态      if(!status) { gesture_data =(uint16_t)data[1]<<8 | data[0];     if(gesture_data)      {  switch(gesture_data)  {      case GES_UP:   printf("Up\r\n");   ledflash=1;      GPIO_WriteBit(GPIOC,GPIO_PIN_9,1u);GPIO_WriteBit(GPIOB,GPIO_PIN_14,0u);GPIO_WriteBit(GPIOD,GPIO_PIN_2,0u);GPIO_WriteBit(GPIOI,GPIO_PIN_0,0u);   break; //向上      case GES_DOWM:      printf("Dowm\r\n");      ledflash=1;GPIO_WriteBit(GPIOC,GPIO_PIN_9,0u);GPIO_WriteBit(GPIOB,GPIO_PIN_14,1u);GPIO_WriteBit(GPIOD,GPIO_PIN_2,0u);GPIO_WriteBit(GPIOI,GPIO_PIN_0,0u);      break; //向下      case GES_LEFT:     printf("Left\r\n");     ledflash=1;GPIO_WriteBit(GPIOC,GPIO_PIN_9,0u);GPIO_WriteBit(GPIOB,GPIO_PIN_14,0u);GPIO_WriteBit(GPIOD,GPIO_PIN_2,1u);GPIO_WriteBit(GPIOI,GPIO_PIN_0,0u);     break; //向左      case GES_RIGHT:   printf("Right\r\n");   ledflash=1;GPIO_WriteBit(GPIOC,GPIO_PIN_9,0u);GPIO_WriteBit(GPIOB,GPIO_PIN_14,0u);GPIO_WriteBit(GPIOD,GPIO_PIN_2,0u);GPIO_WriteBit(GPIOI,GPIO_PIN_0,1u);   break; //向右      default:ledflash=0; break; }     app_delay_ms(300); i++; printf("### check %d\r\n",i); if(i==500) {     i=0; } }}

main.c文件：

/* * Functions. */int main(void){      uint8_t check_yn =0;    BOARD_Init();    printf("hello, world\r\n");     app_delay_ms(500); printf("PAJ7620U2 test\r\n");   while(!paj7620u2_init())    { printf("PAJ7620U2 Error!!!\r\n");check_yn = 1;    } if(check_yn==1) {     printf("PAJ7620U2 Ok!!!\r\n"); }    while (1)    {if(check_yn==1)  {      paj7620u2_sensor_test();//PAJ7620U2传感器测试  }    }}

六、最后实验输出结果：