提供新唐M031KG6AE用IIC写的oled的驱动

以下是基于新唐M031KG6AE芯片的IIC OLED驱动程序示例，供参考：

#include "NuMicro.h"

#define OLED_I2C_ADDR   0x3C

#define OLED_WIDTH      128
#define OLED_HEIGHT     64

#define OLED_CMD_MODE   0x00
#define OLED_DAT_MODE   0x40

#define OLED_CMD_SET_CONTRAST        0x81
#define OLED_CMD_DISPLAY_ALL_ON_RESUME       0xA4
#define OLED_CMD_DISPLAY_ALL_ON      0xA5
#define OLED_CMD_NORMAL_DISPLAY     0xA6
#define OLED_CMD_INVERT_DISPLAY     0xA7
#define OLED_CMD_DISPLAY_OFF        0xAE
#define OLED_CMD_DISPLAY_ON     0xAF
#define OLED_CMD_SET_DISPLAY_OFFSET     0xD3
#define OLED_CMD_SET_COM_PINS      0xDA
#define OLED_CMD_SET_VCOM_DETECT       0xDB
#define OLED_CMD_SET_DISPLAY_CLOCK_DIV 0xD5
#define OLED_CMD_SET_PRECHARGE       0xD9
#define OLED_CMD_SET_MULTIPLEX       0xA8
#define OLED_CMD_SET_LOW_COLUMN      0x00
#define OLED_CMD_SET_HIGH_COLUMN     0x10
#define OLED_CMD_SET_START_LINE      0x40
#define OLED_CMD_MEMORY_MODE     0x20
#define OLED_CMD_COM_SCAN_INC       0xC0
#define OLED_CMD_COM_SCAN_DEC       0xC8
#define OLED_CMD_SEG_REMAP      0xA0
#define OLED_CMD_CHARGE_PUMP        0x8D

#define OLED_CMD_SET_COL_ADDR       0x21
#define OLED_CMD_SET_PAGE_ADDR      0x22

const uint8_t u8InitData[] =
{
    OLED_CMD_DISPLAY_OFF,           // display off
    OLED_CMD_SET_DISPLAY_CLOCK_DIV, // set clock frequency
    0x80,                           // suggested ratio
    OLED_CMD_SET_MULTIPLEX,         // set multiplex ratio
    OLED_HEIGHT - 1,                // height - 1
    OLED_CMD_SET_DISPLAY_OFFSET,    // set display offset
    0x00,
    OLED_CMD_SET_START_LINE | 0x00, // set start line
    OLED_CMD_CHARGE_PUMP,           // set charge pump
    0x14,                           // enable charge pump
    OLED_CMD_MEMORY_MODE,           // set memory addressing mode
    0x00,
    OLED_CMD_SEG_REMAP | 0x01,      // set segment re-map 0 to 127
    OLED_CMD_COM_SCAN_DEC,          // set COM output scan direction
    OLED_CMD_SET_COM_PINS,          // set COM pins hardware configuration
    0x12,
    OLED_CMD_SET_CONTRAST,          // set contrast
    0xCF,
    OLED_CMD_SET_PRECHARGE,         // set pre-charge period
    0xF1,
    OLED_CMD_SET_VCOM_DETECT,       // set Vcomh deselect level
    0x40,
    OLED_CMD_DISPLAY_ALL_ON_RESUME, // set display resume normal
    OLED_CMD_NORMAL_DISPLAY,        // set normal display
    OLED_CMD_DISPLAY_ON,            // display on
};

void OLED_WriteCmd(uint8_t u8Cmd)
{
    uint8_t u8Data[2];

    u8Data[0] = OLED_CMD_MODE;
    u8Data[1] = u8Cmd;

    I2C_WriteMultiBytes(I2C0, OLED_I2C_ADDR, u8Data, 2);
}

void OLED_WriteData(uint8_t u8Data)
{
    uint8_t u8Tmp[2];

    u8Tmp[0] = OLED_DAT_MODE;
    u8Tmp[1] = u8Data;

    I2C_WriteMultiBytes(I2C0, OLED_I2C_ADDR, u8Tmp, 2);
}

void OLED_SetPos(uint8_t u8X, uint8_t u8Y)
{
    OLED_WriteCmd(OLED_CMD_SET_COL_ADDR);
    OLED_WriteCmd(u8X);
    OLED_WriteCmd(OLED_WIDTH - 1);
    OLED_WriteCmd(OLED_CMD_SET_PAGE_ADDR);
    OLED_WriteCmd(u8Y);
    OLED_WriteCmd(7);
}

void OLED_Fill(uint8_t u8Data)
{
    uint8_t u8Page, u8Col;

    for(u8Page = 0; u8Page < 8; u8Page++)
    {
        OLED_SetPos(0, u8Page);
        for(u8Col = 0; u8Col < OLED_WIDTH; u8Col++)
        {
            OLED_WriteData(u8Data);
        }
    }
}

void OLED_Init(void)
{
    uint8_t u8Idx;

    GPIO_SetMode(PB, BIT14, GPIO_MODE_OUTPUT);
    GPIO_SetMode(PB, BIT15, GPIO_MODE_OUTPUT);
    PB14 = 1;
    PB15 = 1;

    CLK_EnableModuleClock(I2C0_MODULE);
    CLK_SetModuleClock(I2C0_MODULE, CLK_I2C_SRC_HXT, 0);
    CLK_SetModuleClock(I2C0_MODULE, CLK_I2C_SRC_HXT, NULL);
    CLK_SetModuleClock(I2C0_MODULE, CLK_I2C_SRC_HXT, NULL);

    I2C_Open(I2C0, 400000);
    I2C_EnableInt(I2C0);
    NVIC_EnableIRQ(I2C0_IRQn);

    for(u8Idx = 0; u8Idx < sizeof(u8InitData); u8Idx++)
    {
        OLED_WriteCmd(u8InitData[u8Idx]);
    }

    OLED_Fill(0x00);
}

void OLED_ShowChar(uint8_t u8X, uint8_t u8Y, uint8_t u8Char)
{
    uint8_t u8Page, u8Col;

    u8Char -= 32;
    for(u8Page = 0; u8Page < 8; u8Page++)
    {
        OLED_SetPos(u8X, u8Y + u8Page);
        for(u8Col = 0; u8Col < 6; u8Col++)
        {
            if(Font6x8[u8Char][u8Col] & (1 << u8Page))
            {
                OLED_WriteData(0xff);
            }
            else
            {
                OLED_WriteData(0x00);
            }
        }
    }
}

void OLED_ShowStr(uint8_t u8X, uint8_t u8Y, const char *pStr)
{
    while(*pStr)
    {
        OLED_ShowChar(u8X, u8Y, *pStr++);
        u8X += 6;
    }
}

void I2C0_IRQHandler(void)
{
    uint32_t u32Status;

    u32Status = I2C_GET_STATUS(I2C0);

    if(I2C_GET_TIMEOUT_FLAG(I2C0))
    {
        I2C_ClearTimeoutFlag(I2C0);
    }
    else
    {
        switch(u32Status)
        {
            case 0x08:      // START has been transmitted
            case 0x10:      // Repeat START has been transmitted
                I2C_SET_DATA(I2C0, (OLED_I2C_ADDR << 1) | 0x00);
                I2C_SET_CONTROL_REG(I2C0, I2C_CTL_SI);
                break;

            case 0x18:      // SLA+W has been transmitted; ACK has been received
            case 0x28:      // DATA has been transmitted; ACK has been received
                break;

            case 0x20:      // SLA+W has been transmitted; NOT ACK has been received
            case 0x30:      // DATA has been transmitted; NOT ACK has been received
            case 0x38:      // Arbitration lost in SLA+R/W or NOT ACK bit
            default:
                break;
        }
    }

    I2C_SET_CONTROL_REG(I2C0, I2C_CTL_SI);
}

以上代码利用IIC接口驱动了一块OLED显示屏。在初始化时，设置了一系列的初始化命令，包括时钟频率、高低位列地址、显示偏移等参数，通过IIC接口逐个发送给OLED屏幕。在显示时，通过OLED_ShowChar函数显示单个字符，通过OLED_ShowStr函数显示一个字符串。