【AT-START-F405测评】4.I2C应用实现温湿度表

只看该作者 · 2024-4-27 16:03

首先来配置I2C，在AT32 Work Bench中开启I2C1，这里可以直接设置I2C的各项参数

自动分配的IO是PC0和PC1

生成代码后添加I2C读写方法，可以考i2c_application_library来实现

#include "yuyy_hard_iic.h"



#define AT32I2C_TIMEOUT 0xFFFF



void YUYY_HARDIIC_ResetCtrl2Register(i2c_type *iicx)

{

  iicx->ctrl2_bit.saddr     = 0;

  iicx->ctrl2_bit.readh10   = 0;

  iicx->ctrl2_bit.cnt       = 0;

  iicx->ctrl2_bit.rlden     = 0;

  iicx->ctrl2_bit.dir       = 0;

}



uint8_t YUYY_HARDIIC_WaitFlag(i2c_type *iicx,uint32_t flag,flag_status status)

{

    uint16_t timeout = AT32I2C_TIMEOUT;

    while(i2c_flag_get(iicx, flag) != status)

    {

        timeout -= 1;

        if(timeout == 0)

            return 1;

    }

    return 0;

}



uint8_t YUYY_HARDIIC_MasterSendStop(i2c_type *iicx)

{

    i2c_stop_generate(iicx);

    if(YUYY_HARDIIC_WaitFlag(iicx,I2C_STOPF_FLAG,SET))

        return 6;

    i2c_flag_clear(iicx, I2C_STOPF_FLAG);

    return 0;

}



uint8_t YUYY_HARDIIC_MasterSendStart(i2c_type *iicx,uint8_t devaddr,i2c_start_mode_type startmode,i2c_reload_stop_mode_type stopmode,uint8_t datalen)

{

    if(startmode != I2C_WITHOUT_START && YUYY_HARDIIC_WaitFlag(iicx,I2C_BUSYF_FLAG,RESET))

        return 1;

    i2c_transmit_set(iicx, devaddr<<1, datalen, stopmode, startmode);

    return 0;

}



uint8_t YUYY_HARDIIC_SendDatas(i2c_type *iicx,uint8_t *datas,uint8_t datalen)

{

    uint8_t i=0;

    while(i<datalen)

    {

        if(YUYY_HARDIIC_WaitFlag(iicx,I2C_TDIS_FLAG,SET))

        {

            if(i2c_flag_get(iicx, I2C_ACKFAIL_FLAG) != RESET)

            {

                i2c_flag_clear(iicx, I2C_ACKFAIL_FLAG);

                return 3;

            }

            YUYY_HARDIIC_MasterSendStop(iicx);

            return 2;

        }

        if(i2c_flag_get(iicx, I2C_ACKFAIL_FLAG) != RESET)

        {

            i2c_flag_clear(iicx, I2C_ACKFAIL_FLAG);

            return 3;

        }

        i2c_data_send(iicx, datas[i]);

        i += 1;

    }

    return 0;

}



uint8_t YUYY_HARDIIC_ReadDatas(i2c_type *iicx,uint8_t *datas,uint8_t datalen)

{

    uint8_t i=0;

    while(i<datalen)

    {

        if(YUYY_HARDIIC_WaitFlag(iicx,I2C_RDBF_FLAG,SET))

        {

            if(i2c_flag_get(iicx, I2C_ACKFAIL_FLAG) != RESET)

            {

                i2c_flag_clear(iicx, I2C_ACKFAIL_FLAG);

                return 3;

            }

            YUYY_HARDIIC_MasterSendStop(iicx);

            return 2;

        }

        datas[i] = i2c_data_receive(iicx);

        i += 1;

    }

    return 0;

}



uint8_t YUYY_HARDIIC_MasterSendDatasWithStartStop(i2c_type *iicx,uint8_t devaddr,uint8_t startstop,uint8_t *datas,uint16_t datalen)

{

    uint8_t err = 0;

    if(!iicx)

        return 1;

    i2c_start_mode_type startmode = I2C_WITHOUT_START;

    i2c_reload_stop_mode_type stopmode = I2C_RELOAD_MODE;

    if(startstop & YUYY_IIC_SEND_START)

        startmode = I2C_GEN_START_WRITE;

    if(startstop & YUYY_IIC_SEND_STOP)

        stopmode = I2C_SOFT_STOP_MODE;

    err = YUYY_HARDIIC_MasterSendStart(iicx,devaddr,startmode,stopmode,datalen);

    if(err == 0)

        err = YUYY_HARDIIC_SendDatas(iicx,datas,datalen);

    if(stopmode == I2C_SOFT_STOP_MODE)

    {

        if(err == 0)

            err = YUYY_HARDIIC_MasterSendStop(iicx);

        if(err != 0)

            YUYY_HARDIIC_ResetCtrl2Register(iicx);

    }

    return err;

}

uint8_t YUYY_HARDIIC_MasterReadDatasWithStartStop(i2c_type *iicx,uint8_t devaddr,uint8_t startstop,uint8_t *datas,uint16_t datalen)

{

    uint8_t err = 0;

    if(!iicx)

        return 1;

    i2c_start_mode_type startmode = I2C_WITHOUT_START;

    i2c_reload_stop_mode_type stopmode = I2C_RELOAD_MODE;

    if(startstop & YUYY_IIC_SEND_START)

        startmode = I2C_GEN_START_READ;

    if(startstop & YUYY_IIC_SEND_STOP)

        stopmode = I2C_SOFT_STOP_MODE;

    err = YUYY_HARDIIC_MasterSendStart(iicx,devaddr,startmode,stopmode,datalen);

    if(err == 0)

        err = YUYY_HARDIIC_ReadDatas(iicx,datas,datalen);

    if(stopmode == I2C_SOFT_STOP_MODE)

    {

        if(err == 0)

            err = YUYY_HARDIIC_MasterSendStop(iicx);

        if(err != 0)

            YUYY_HARDIIC_ResetCtrl2Register(iicx);

    }

    return err;

}



uint8_t YUYY_HARDIIC_MasterSendRegDatas(i2c_type *iicx,uint8_t devaddr,uint8_t *reg,uint8_t reglen,uint8_t *datas,uint16_t datalen)

{

    uint8_t err = 0;

    if(!iicx)

        return 1;

    err = YUYY_HARDIIC_MasterSendStart(iicx,devaddr,I2C_GEN_START_WRITE,I2C_SOFT_STOP_MODE,reglen+datalen);

    err = YUYY_HARDIIC_MasterSendDatasWithStartStop(iicx,devaddr,0,reg,reglen);

    if(err == 0)

        err = YUYY_HARDIIC_MasterSendDatasWithStartStop(iicx,devaddr,YUYY_IIC_SEND_STOP,datas,datalen);

    return err;

}

uint8_t YUYY_HARDIIC_MasterReadRegDatas(i2c_type *iicx,uint8_t devaddr,uint8_t *reg,uint8_t reglen,uint8_t *datas,uint16_t datalen)

{

    uint8_t err = 0;

    if(!iicx)

        return 1;

    if(reglen > 0)

    {

        err = YUYY_HARDIIC_MasterSendStart(iicx,devaddr,I2C_GEN_START_WRITE,I2C_SOFT_STOP_MODE,reglen);

        if(err == 0)

            err = YUYY_HARDIIC_SendDatas(iicx,reg,reglen);

        if(err == 0 && YUYY_HARDIIC_WaitFlag(iicx,I2C_TDC_FLAG,SET))

            err = 4;

    }

    if(err == 0)

        err = YUYY_HARDIIC_MasterReadDatasWithStartStop(iicx,devaddr,YUYY_IIC_SEND_STOP,datas,datalen);

    return err;

}



uint8_t YUYY_HARDIIC_MasterSendDatas(YUYY_IIC_TYPE iicx,uint8_t devaddr,uint8_t *datas,uint16_t datalen)

{

    return YUYY_HARDIIC_MasterSendDatasWithStartStop(iicx,devaddr,YUYY_IIC_SEND_START|YUYY_IIC_SEND_STOP,datas,datalen);

}



uint8_t YUYY_HARDIIC_MasterReadDatas(YUYY_IIC_TYPE iicx,uint8_t devaddr,uint8_t *datas,uint16_t datalen)

{

    return YUYY_HARDIIC_MasterReadDatasWithStartStop(iicx,devaddr,YUYY_IIC_SEND_START|YUYY_IIC_SEND_STOP,datas,datalen);

}



uint8_t YUYY_HARDIIC_MasterSendReg8Datas(YUYY_IIC_TYPE iicx,uint8_t devaddr,uint8_t reg,uint8_t *datas,uint16_t datalen)

{

    return YUYY_HARDIIC_MasterSendRegDatas(iicx,devaddr,®,1,datas,datalen);

}

uint8_t YUYY_HARDIIC_MasterReadReg8Datas(YUYY_IIC_TYPE iicx,uint8_t devaddr,uint8_t reg,uint8_t *datas,uint16_t datalen)

{

    return YUYY_HARDIIC_MasterReadRegDatas(iicx,devaddr,®,1,datas,datalen);

}

uint8_t YUYY_HARDIIC_MasterSendReg16SEDatas(YUYY_IIC_TYPE iicx,uint8_t devaddr,uint16_t reg,uint8_t *datas,uint16_t datalen)

{

    uint8_t regd[2];

    regd[0] = reg&0xFF;

    regd[1] = (reg>>8)&0xFF;

    return YUYY_HARDIIC_MasterSendRegDatas(iicx,devaddr,regd,2,datas,datalen);

}

uint8_t YUYY_HARDIIC_MasterReadReg16SEDatas(YUYY_IIC_TYPE iicx,uint8_t devaddr,uint16_t reg,uint8_t *datas,uint16_t datalen)

{

    uint8_t regd[2];

    regd[0] = reg&0xFF;

    regd[1] = (reg>>8)&0xFF;

    return YUYY_HARDIIC_MasterReadRegDatas(iicx,devaddr,regd,2,datas,datalen);

}

uint8_t YUYY_HARDIIC_MasterSendReg16BEDatas(YUYY_IIC_TYPE iicx,uint8_t devaddr,uint16_t reg,uint8_t *datas,uint16_t datalen)

{

    uint8_t regd[2];

    regd[1] = reg&0xFF;

    regd[0] = (reg>>8)&0xFF;

    return YUYY_HARDIIC_MasterSendRegDatas(iicx,devaddr,regd,2,datas,datalen);

}

uint8_t YUYY_HARDIIC_MasterReadReg16BEDatas(YUYY_IIC_TYPE iicx,uint8_t devaddr,uint16_t reg,uint8_t *datas,uint16_t datalen)

{

    uint8_t regd[2];

    regd[1] = reg&0xFF;

    regd[0] = (reg>>8)&0xFF;

    return YUYY_HARDIIC_MasterReadRegDatas(iicx,devaddr,regd,2,datas,datalen);

}

先来驱动这个OLED显示屏

这个屏幕之前评测423时介绍了驱动方法，代码可以直接拿过来用，帖子地址https://bbs.21ic.com/icview-3338910-1-1.html
使用的时候只要修改i2c的指针和写方法就好了

复制

YUYY_OLED_SSD1315_DEV_Type oled_dev;

void oled_init()

{

    oled_dev.iicx = I2C1;

    oled_dev.iic_senddatas_func = (YUYY_OLED_SSD1315_IICSendDatasFunc_Type)YUYY_HARDIIC_MasterSendReg8Datas;

    YUYY_OLED_SSD1315_Init(&oled_dev);

    YUYY_OLED_SSD1315_ClearScreen(&oled_dev);

    YUYY_OLED_SSD1315_DisplayString8x16(&oled_dev,0,0,0," AT32F405 TEST");

    YUYY_OLED_SSD1315_DisplayString8x16(&oled_dev,0,2,0,"    I2C OLED");

    YUYY_OLED_SSD1315_DisplayString8x16(&oled_dev,0,4,0,"  bbs.21ic.com");

    YUYY_OLED_SSD1315_DisplayString8x16(&oled_dev,0,6,0,"Code by yuyy1989");

}

运行效果

再来用I2C读取DHTC12的温湿度数据，这个在之前评测423时也介绍过驱动方法，帖子地址https://bbs.21ic.com/icview-3338286-1-1.html
同样修改i2c的指针和写方法就好，和OLED用同一路I2C

复制

YUYY_DHTC12_DEV_Type dhtc12_dev;

void detc12_init()

{

    dhtc12_dev.iicx = I2C1;

    dhtc12_dev.delayms_func = YUYY_DelayMs;

    dhtc12_dev.iic_readdatas_func = YUYY_HARDIIC_MasterReadDatas;

    dhtc12_dev.iic_readregdatas_func = YUYY_HARDIIC_MasterReadReg16BEDatas;

    dhtc12_dev.iic_sendregdatas_func = YUYY_HARDIIC_MasterSendReg16BEDatas;

    YUYY_DHTC12_Init(&dhtc12_dev);

}

在OLED屏幕上显示温湿度，在主循环中添加

复制

YUYY_DelayMs(1000);

      if(!YUYY_DHTC12_ReadHT(&dhtc12_dev,&temp,&humi))

      {

          sprintf(out,"T:%03.1f  H:%03.1f%%",temp,humi/);

          YUYY_OLED_SSD1315_DisplayString8x16(&oled_dev,0,4,0,out);

      }

运行效果