【CW32F030CxTx StartKit测评】3.硬件I2C驱动OLED

//I2C初始化

void I2C_Init(void)

{

    I2C_InitTypeDef I2C_InitStruct;

    GPIO_InitTypeDef GPIO_InitStructure;



    RCC_AHBPeriphClk_Enable(SDA_GPIO_CRM_CLK, ENABLE);

    RCC_APBPeriphClk_Enable1(RCC_APB1_PERIPH_I2C2, ENABLE);



    PA01_AFx_I2C2SCL();

    PA02_AFx_I2C2SDA();

    GPIO_InitStructure.Pins = SCL_PIN | SDA_PIN;

    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_OD;

    GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;

    GPIO_Init(SCL_GPIO, &GPIO_InitStructure);



    //I2C初始化

    I2C_InitStruct.I2C_BaudEn = ENABLE;

    I2C_InitStruct.I2C_Baud = 0x01;  //500K=(8000000/(8*(1+1))

    I2C_InitStruct.I2C_FLT = DISABLE;

    I2C_InitStruct.I2C_AA = DISABLE;

    I2C_Master_Init(I2C_MASTER, &I2C_InitStruct); //初始化模块



    I2C_Cmd(I2C_MASTER, ENABLE); //模块使能



}

//向设备写控制命令

static void OLED_Write_CMD(unsigned char cmd)

{

    #ifdef HW_I2C

    unsigned char tx_buf[BUF_SIZE] = {0x00, cmd};

    I2C_MasterSendDataToSlave(CW_I2C2, tx_buf, BUF_SIZE);

    #endif

    #ifdef SW_I2C

    I2C_Start();

    I2C_Send_Byte(0x78);

    I2C_Wait_Ack();

    I2C_Send_Byte(0x00);

    I2C_Wait_Ack();

    I2C_Send_Byte(cmd);

    I2C_Wait_Ack();

    I2C_Stop();

    #endif

    #ifdef HW_SPI

    OLED_CS_LOW;

    OLED_DC_LOW;



    while (SPI_GetFlagStatus(SPI_MASTER, SPI_FLAG_TXE) == RESET);



    SPI_SendData(SPI_MASTER, cmd);



    while (SPI_GetFlagStatus(SPI_MASTER, SPI_FLAG_RXNE) == RESET);



    SPI_ReceiveData(SPI_MASTER);

    OLED_CS_HIGH;

    #endif

    #ifdef SW_SPI

    OLED_CS_LOW;

    OLED_DC_LOW;

    SPI_WriteByte(cmd);

    OLED_CS_HIGH;

    #endif

}



//向设备写数据

static void OLED_Write_Date(unsigned char date)

{

    #ifdef HW_I2C

    unsigned char tx_buf[BUF_SIZE] = {0x40, date};

    I2C_MasterSendDataToSlave(CW_I2C2, tx_buf, BUF_SIZE);

    #endif

    #ifdef SW_I2C

    I2C_Start();

    I2C_Send_Byte(0x78);

    I2C_Wait_Ack();

    I2C_Send_Byte(0x40);

    I2C_Wait_Ack();

    I2C_Send_Byte(date);

    I2C_Wait_Ack();

    I2C_Stop();

    #endif

    #ifdef HW_SPI

    OLED_CS_LOW;

    OLED_DC_HIGH;



    while (SPI_GetFlagStatus(SPI_MASTER, SPI_FLAG_TXE) == RESET);



    SPI_SendData(SPI_MASTER, date);



    while (SPI_GetFlagStatus(SPI_MASTER, SPI_FLAG_RXNE) == RESET);



    SPI_ReceiveData(SPI_MASTER);

    OLED_CS_HIGH;

    #endif

    #ifdef SW_SPI

    OLED_CS_LOW;

    OLED_DC_HIGH;

    SPI_WriteByte(date);

    OLED_CS_HIGH;

    #endif

}



//坐标设置

static void OLED_Set_Pos(unsigned char x, unsigned char y)

{

    OLED_Write_CMD(0xB0 + y);

    OLED_Write_CMD(((x & 0xF0) >> 4) | 0x10);

    OLED_Write_CMD(x & 0x0F);

}



//开启OLED显示

static void OLED_Display_On(void)

{

    OLED_Write_CMD(0x8D); //SET DCDC命令

    OLED_Write_CMD(0x14); //DCDC ON

    OLED_Write_CMD(0xAF); //DISPLAY ON

}



//关闭OLED显示

static void OLED_Display_Off(void)

{

    OLED_Write_CMD(0x8D); //SET DCDC命令

    OLED_Write_CMD(0x10); //DCDC OFF

    OLED_Write_CMD(0xAE); //DISPLAY OFF

}



//OLED清屏

void OLED_Clear(void)

{

    unsigned char cnt, count;



    for(cnt = 0; cnt < 8; cnt++)

    {

        OLED_Write_CMD(0xB0 + cnt);

        OLED_Write_CMD(0x00);

        OLED_Write_CMD(0x10);



        for(count = 0; count < 128; count++)

        {

            OLED_Write_Date(0x00);

        }

    }

}



//OLED清行

void OLED_Clear_Row(unsigned char n)

{

    unsigned char count;



    OLED_Write_CMD(0xB0 + n);

    OLED_Write_CMD(0x00);

    OLED_Write_CMD(0x10);



    for(count = 0; count < 128; count++)

    {

        OLED_Write_Date(0x00);

    }

}



//OLED填满屏幕

void OLED_Fill(void)

{

    unsigned char cnt, count;



    for(cnt = 0; cnt < 8; cnt++)

    {

        OLED_Write_CMD(0xB0 + cnt); //设置页地址（0~7）

        OLED_Write_CMD(0x00); //设置显示位置—列低地址

        OLED_Write_CMD(0x10); //设置显示位置—列高地址



        for(count = 0; count < 128; count++)

        {

            OLED_Write_Date(0x01);

        }

    }

}



//指定位置显示一个字符

//x:0~127

//y:0~63

//chr:字符

//mode:0,反白显示;1,正常显示

//size:选择字体 16/12

void OLED_ShowChar(unsigned char x, unsigned char y, unsigned char chr, unsigned char size)

{

    unsigned char offset = 0, cnt = 0;



    offset = chr - ' '; //计算偏移量



    if(x > 128 - 1)

    {

        x = 0;

        y = y + 2;

    }



    if(size == 16)

    {

        OLED_Set_Pos(x, y);



        for(cnt = 0; cnt < 8; cnt++)

        {

            OLED_Write_Date(F8x16[offset * 16 + cnt]);

        }



        OLED_Set_Pos(x, y + 1);



        for(cnt = 0; cnt < 8; cnt++)

        {

            OLED_Write_Date(F8x16[offset * 16 + cnt + 8]);

        }

    }

    else

    {

        OLED_Set_Pos(x, y);



        for(cnt = 0; cnt < 6; cnt++)

        {

            OLED_Write_Date(F6x8[offset][cnt]);

        }

    }

}



unsigned int oled_pow(unsigned char m, unsigned char n)

{

    unsigned int result = 1;



    while(n--)

    {

        result *= m;

    }



    return result;

}



//指定位置显示一个数字

//x,y:起点坐标

//num:数值(0~4294967295)

//len:数字的位数

//size:字体大小

//mode:模式        0,填充模式;1,叠加模式

void OLED_ShowNum(unsigned char x, unsigned char y, unsigned int num, unsigned char len, unsigned char size)

{

    unsigned char cnt, temp;

    unsigned char show = 0;



    for(cnt = 0; cnt < len; cnt++)

    {

        temp = (num / oled_pow(10, len - cnt - 1)) % 10;



        if(show == 0 && cnt < (len - 1))

        {

            if(temp == 0)

            {

                OLED_ShowChar(x + (size / 2) * cnt, y, ' ', size);

                continue;

            }

            else

            {

                show = 1;

            }

        }



        OLED_ShowChar(x + (size / 2) * cnt, y, temp + '0', size);

    }

}



//指定位置显示字符串

void OLED_ShowString(unsigned char x, unsigned char y, unsigned char *chr, unsigned char size)

{

    unsigned char cnt = 0;



    while(chr[cnt] != '\0')

    {

        OLED_ShowChar(x, y, chr[cnt], size);

        x += 8;



        if(x > 120)

        {

            x = 0;

            y += 2;

        }



        cnt++;

    }

}



//显示汉字

void OLED_ShowCHinese(unsigned char x, unsigned char y, unsigned char no)

{

    unsigned char cnt, addr = 0;



    OLED_Set_Pos(x, y);



    for(cnt = 0; cnt < 16; cnt++)

    {

        OLED_Write_Date(Hzk[2 * no][cnt]);

        addr++;

    }



    OLED_Set_Pos(x, y + 1);



    for(cnt = 0; cnt < 16; cnt++)

    {

        OLED_Write_Date(Hzk[2 * no + 1][cnt]);

        addr++;

    }

}



//显示图片

/*

        @brief                        显示图片

        @param                        x0：起始列地址

                                        y0：起始页地址

                                        x1：终止列地址

                                        y1：终止页地址

                                        BMP[]：存放图片代码的数组

        @retval                        无

 */

void OLED_DrawBMP(unsigned char x0, unsigned char y0, unsigned char x1, unsigned char y1, unsigned char BMP[])

{

    unsigned int j = 0; //定义变量

    unsigned char x, y; //定义变量



    if(y1 % 8 == 0)

    {

        y = y1 / 8; //判断终止页是否为8的整数倍

    }

    else

    {

        y = y1 / 8 + 1;

    }



    for(y = y0; y < y1; y++) //从起始页开始，画到终止页

    {

        OLED_Set_Pos(x0, y); //在页的起始列开始画



        for(x = x0; x < x1; x++) //画x1 - x0 列

        {

            OLED_Write_Date(BMP[j++]); //画图片的点

        }

    }

}



//显示动图

/*

        @brief                        显示动图

        @param                        x0：起始列地址

                                y0：起始页地址

                                x1：终止列地址

                                y1：终止页地址

                                k: 帧个数

                                m: 单帧数组大小

                                BMP[][m]：存放动图代码的数组

        @retval                        无

 */

void OLED_DrawGIF(unsigned char x0, unsigned char y0, unsigned char x1, unsigned char y1, unsigned char k, int m, const unsigned char GIF[][m])

{

    unsigned int j = 0; //定义变量

    unsigned char x, y, i; //定义变量



    if(y1 % 8 == 0)

    {

        y = y1 / 8; //判断终止页是否为8的整数倍

    }

    else

    {

        y = y1 / 8 + 1;

    }



    for (i = 0; i < k; i++) //从第一帧开始画

    {

        j = 0;



        for(y = y0; y < y1; y++) //从起始页开始，画到终止页

        {

            OLED_Set_Pos(x0, y); //在页的起始列开始画



            for(x = x0; x < x1; x++) //画x1 - x0 列

            {

                OLED_Write_Date(GIF[i][j++]); //画图片的点

            }

        }



        //Delay_Ms(80);

    }

}





#if defined SW_SPI || defined HW_SPI

//SPI驱动方式DC、RES引脚初始化

void OLED_SPI_GPIO_Init(void)

{

    GPIO_InitTypeDef GPIO_InitStructure;



    //根据GPIO组初始化GPIO时钟

    RCC_AHBPeriphClk_Enable( RCC_OLED_DC | RCC_OLED_RES, ENABLE);

    //GPIO_DC初始化设置

    GPIO_InitStructure.Pins = PIN_OLED_DC;

    GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;

    GPIO_InitStructure.IT = GPIO_IT_NONE;

    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;

    GPIO_Init(PORT_OLED_DC, &GPIO_InitStructure);

    //GPIO_RES初始化设置

    GPIO_InitStructure.Pins = PIN_OLED_RES;

    GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;

    GPIO_InitStructure.IT = GPIO_IT_NONE;

    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;

    GPIO_Init(PORT_OLED_RES, &GPIO_InitStructure);



    OLED_RES_LOW;

    Delay_Ms(200);

    OLED_RES_HIGH;

}

#endif





//OLED初始化

void OLED_Init(void)

{

    #ifdef SW_I2C

    I2C_Init();

    #endif

    #ifdef HW_I2C

    I2C_Init();

    #endif

    #ifdef SW_SPI

    SPI_Initial();

    OLED_SPI_GPIO_Init();

    #endif

    #ifdef HW_SPI

    SPI_Initial();

    OLED_SPI_GPIO_Init();

    #endif

    Delay_Ms(200);

    OLED_Write_CMD(0xAE); //display off

    OLED_Write_CMD(0x00); //set low column address

    OLED_Write_CMD(0x10); //set high column address

    OLED_Write_CMD(0x40); //set start line address

    OLED_Write_CMD(0xB0); //set page address

    OLED_Write_CMD(0x81); //contract control

    OLED_Write_CMD(0xFF); //128

    OLED_Write_CMD(0xA1); //set segment remap

    OLED_Write_CMD(0xA6); //normal / reverse

    OLED_Write_CMD(0xA8); //set multiplex ratio(1 to 64)

    OLED_Write_CMD(0x3F); //1/32 duty

    OLED_Write_CMD(0xC8); //Com scan direction

    OLED_Write_CMD(0xD3); //set display offset

    OLED_Write_CMD(0x00); //

    OLED_Write_CMD(0xD5); //set osc division

    OLED_Write_CMD(0x80); //

    OLED_Write_CMD(0xD8); //set area color mode off

    OLED_Write_CMD(0x05); //

    OLED_Write_CMD(0xD9); //Set Pre-Charge Period

    OLED_Write_CMD(0xF1); //

    OLED_Write_CMD(0xDA); //set com pin configuartion

    OLED_Write_CMD(0x12); //

    OLED_Write_CMD(0xDB); //set Vcomh

    OLED_Write_CMD(0x30); //

    OLED_Write_CMD(0x8D); //set charge pump enable

    OLED_Write_CMD(0x14); //

    OLED_Write_CMD(0xAF); //turn on oled panel

}