[开发板] 【CW32L031CxTx StartKit评估板测评】7.I2C的使用

void i2c_init()

{

    GPIO_InitTypeDef GPIO_InitStructure = {0}; 

    I2C_InitTypeDef I2C_InitStruct = {0};

    __RCC_GPIOB_CLK_ENABLE();

    __RCC_I2C1_CLK_ENABLE();

    PB06_AFx_I2C1SCL();

    PB07_AFx_I2C1SDA();

    GPIO_InitStructure.Pins = GPIO_PIN_6 | GPIO_PIN_7;

    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_OD;

    GPIO_Init(CW_GPIOB, &GPIO_InitStructure);

    

    I2C_InitStruct.I2C_BaudEn = ENABLE;

    I2C_InitStruct.I2C_Baud = 0x0B;//500K=(48000000/(8*(11+1))

    I2C_InitStruct.I2C_FLT = DISABLE;

    I2C_InitStruct.I2C_AA = DISABLE;



    I2C1_DeInit();

    I2C_Master_Init(CW_I2C1,&I2C_InitStruct);//初始化模块

    I2C_Cmd(CW_I2C1,ENABLE);  //模块使能

}



int32_t main(void)

{

    uint8_t testdata[16] = {0},index = 0;

    RCC_HCLKPRS_Config(RCC_HCLK_DIV1);

    RCC_PCLKPRS_Config(RCC_PCLK_DIV1);

    uart1_init();

    i2c_init();

    I2C_MasterReadEepomData(CW_I2C1,0,testdata,16);

    printf("EEPROM read data:\n");

    index = 0;

    while(index < 16)

    {

        printf("%02X ",testdata[index]);

        if(index < 10)

            testdata[index] = index+1;

        else

            testdata[index] = 0xFF;

        index += 1;

    }

    printf("\n");

    printf("EEPROM write data:\n");

    I2C_MasterWriteEepromData(CW_I2C1,0,testdata,10);

    index = 0;

    while(index < 10)

    {

        printf("%02X ",testdata[index]);

        index += 1;

    }

    printf("\n");

    yuyy_delay_ms(10);

    I2C_MasterReadEepomData(CW_I2C1,0,testdata,16);

    printf("EEPROM read data after write:\n");

    index = 0;

    while(index < 16)

    {

        printf("%02X ",testdata[index]);

        index += 1;

    }

    printf("\n");

    while (1)

    {

    }

}

YUYY_IIC_DEV_t iic_dev;

YUYY_DHTC12_DEV_t dhtc12_dev;

void iic_devices_init()

{

    I2C_InitTypeDef I2C_InitStruct;

    GPIO_InitTypeDef GPIO_InitStructure;



    __RCC_GPIOB_CLK_ENABLE();

    PB10_AFx_I2C1SCL();

    PB11_AFx_I2C1SDA();

    

    GPIO_InitStructure.Pins = GPIO_PIN_10|GPIO_PIN_11;

    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_OD; 

    GPIO_Init(CW_GPIOB, &GPIO_InitStructure);

    

    __RCC_I2C1_CLK_ENABLE();

    I2C_InitStruct.I2C_BaudEn = ENABLE;

    I2C_InitStruct.I2C_Baud = 59;  //100K=(48000000/(8*(59+1))

    I2C_InitStruct.I2C_FLT = ENABLE;

    I2C_InitStruct.I2C_AA = DISABLE;

    I2C1_DeInit();

    I2C_Master_Init(CW_I2C1,&I2C_InitStruct);//初始化模块

    I2C_Cmd(CW_I2C1,ENABLE);  //模块使能

    iic_dev.iictype = YUYY_IIC_TYPE_HARD;

    iic_dev.hiicx = CW_I2C1;

    

    dhtc12_dev.iicx = &iic_dev;

    yuyy_dhtc12_init(&dhtc12_dev);

}



uint8_t const test16x16temp[]={

0x00,0x0C,0x12,0x0C,0x00,0xC0,0x70,0x10,0x08,0x08,0x08,0x08,0x10,0x30,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x0F,0x18,0x30,0x20,0x20,0x20,0x20,0x30,0x1C,0x00,0x00

};



int32_t main(void)

{

    float temp,hum;

    char out[20];

    uint8_t outlen;

    RCC_HSI_48M_init();

    RCC_HCLKPRS_Config(RCC_HCLK_DIV1);

    RCC_PCLKPRS_Config(RCC_PCLK_DIV1);

    hs12864g18b_init();

    yuyy_hs12864g18b_clear_screen(&hs12864_dev);

    yuyy_hs12864g18b_display_string_8x16(&hs12864_dev,0,0,0,(uint8_t *)"CW32L031 TEST");

    yuyy_hs12864g18b_display_string_8x16(&hs12864_dev,0,4,0,(uint8_t *)"Code by yuyy1989");

    iic_devices_init();

    while (1)

    {

        yuyy_dhtc12_readHT(&dhtc12_dev,&temp,&hum);

        outlen = sprintf(out," %.1f%% %.1f",hum,temp);

        yuyy_hs12864g18b_display_string_8x16(&hs12864_dev,0,2,0,(uint8_t *)out);

        yuyy_hs12864g18b_display_graphic_16x16(&hs12864_dev,0,2,8*outlen,(uint8_t *)test16x16temp);

        yuyy_hs12864g18b_display_string_8x16(&hs12864_dev,0,2,8*(outlen+2),(uint8_t *)"   ");

        yuyy_delay_ms(1000);

    }

}