stm32专题三十：12864 IIC驱动

1 IIC发送数据 / 命令时序

2 12864 图形显示（显存）

RAM的大小是128×64位，RAM分为8页，从PAGE0到PAGE7，用于单色128x64点阵显示。

3 行列设置

1 设置起始行坐标（设置页）

命令 0XB0 ~ 0XB7 用于设置分页，所以我们显示的分页要 + 偏移（0XB0）

2 设置起始列坐标

4 制作字模

1 字模软件设置方式：

2 生成的字模的批处理：

生成的字模如图所示，我们要转成 0X00 这种格式：

使用 sublime 这个软件，可以进行批处理（先全选，然后再 快捷键 Ctrl + Shift + L）：

字模生成完毕。

驱动程序如下所示：

bsp_12864.c

#include "bsp_12864.h"

#include "bsp_font.h"

/**

  * @brief 向 oled 写入命令

  */

void OLED_Write_Cmd(uint8_t cmd)

{

    uint8_t temp = cmd;

    HAL_I2C_Mem_Write(&I2C_X, OLED_ADDR, CMD_CTRL, I2C_MEMADD_SIZE_8BIT, &temp, 1, 0xFFFF);

}

/**

  * @brief 向 oled 写入数据

  */

void OLED_Write_Data(uint8_t data)

{

    uint8_t temp = data;

    HAL_I2C_Mem_Write(&I2C_X, OLED_ADDR, DATA_CTRL, I2C_MEMADD_SIZE_8BIT, &temp, 1, 0xFFFF);

}

/**

  * @brief 设置 oled 写入坐标 

  * @param x    列坐标：0 ~ 127

  * @param y    行坐标：0 ~ 63

  */

void OLED_Set_Pos(uint8_t x, uint8_t y)

{

    OLED_Write_Cmd(0xb0 + y);                 // 写入页地址

    OLED_Write_Cmd((x & 0x0f));               // 写入列的地址 (低半字节)

    OLED_Write_Cmd(((x & 0xf0) >> 4) | 0x10); // 写入列的地址(高半字节)

}

/**

  * @brief oled 清屏

  */

void OLED_Clear(void)

{

    unsigned char page, row;

    for (page = 0; page < 8; page++)

    {

        OLED_Write_Cmd(0xb0 + page); // 从0 ~ 7页依次写入

        OLED_Write_Cmd(0x00);        // 低位列地址

        OLED_Write_Cmd(0x10);        // 高位列地址

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

        {

            OLED_Write_Data(0X00);

        }

    }

}

void OLED_Init(void)

{

    HAL_Delay(100); // 延迟(必须要有)

    OLED_Write_Cmd(0xAE); // 关闭显示

    OLED_Write_Cmd(0x00); // 设置低列地址

    OLED_Write_Cmd(0x10); // 设置高列地址

    OLED_Write_Cmd(0x40); // 设置起始行地址

    OLED_Write_Cmd(0xB0); // 设置页地址

    OLED_Write_Cmd(0x81); // 对比度设置，可设置亮度

    OLED_Write_Cmd(0xFF); // 265

    OLED_Write_Cmd(0xA1); // 设置段(SEG)的起始映射地址

    OLED_Write_Cmd(0xA6); // 正常显示；0xa7逆显示

    OLED_Write_Cmd(0xA8); // 设置驱动路数（16~64）

    OLED_Write_Cmd(0x3F); // 64duty

    OLED_Write_Cmd(0xC8); // 重映射模式，COM[N-1]~COM0扫描

    OLED_Write_Cmd(0xD3); // 设置显示偏移

    OLED_Write_Cmd(0x00); // 无偏移

    OLED_Write_Cmd(0xD5); // 设置震荡器分频

    OLED_Write_Cmd(0x80); // 使用默认值

    OLED_Write_Cmd(0xD9); // 设置 Pre-Charge Period

    OLED_Write_Cmd(0xF1); // 使用官方推荐值

    OLED_Write_Cmd(0xDA); // 设置 com pin configuartion

    OLED_Write_Cmd(0x12); // 使用默认值

    OLED_Write_Cmd(0xDB); // 设置 Vcomh，可调节亮度（默认）

    OLED_Write_Cmd(0x40); // 使用官方推荐值

    OLED_Write_Cmd(0x8D); // 设置OLED电荷泵

    OLED_Write_Cmd(0x14); // 开显示

    OLED_Write_Cmd(0xAF); // 开启OLED面板显示

}

/**

  * @brief 将 OLED 从休眠中唤醒

  */

void OLED_ON(void)

{

    OLED_Write_Cmd(0X8D); // 设置电荷泵

    OLED_Write_Cmd(0X14); // 开启电荷泵

    OLED_Write_Cmd(0XAF); // OLED 唤醒

}

/**

  * @brief 让OLED休眠

  */

void OLED_OFF(void)

{

    OLED_Write_Cmd(0X8D); // 设置电荷泵

    OLED_Write_Cmd(0X10); // 关闭电荷泵

    OLED_Write_Cmd(0XAE); // OLED 休眠

}

/**

  * @brief 显示 bsp_font.h 中的ASCII字符 字体为 Consolas

  * @param x：  起始点列坐标：0 ~ 127

  *        y:   起始点页坐标：0 ~ 7

  * @param *ch：要显示的字符串

  */

void OLED_Show_String(uint8_t x, uint8_t y, uint8_t *ch)

{

    uint8_t i = 0, c = 0, k = 0;

    while (ch[k] != '')

    {

        c = ch[k] - ' ';

        if (x > 120)

        {

            x = 0;

            y++;

        }

        OLED_Set_Pos(x, y);

        for (i = 0; i < 8; i++)

        {

            OLED_Write_Data(Consolas_8X16[c * 16 + i]);

        }

        OLED_Set_Pos(x, y + 1);

        for (i = 0; i < 8; i++)

        {

            OLED_Write_Data(Consolas_8X16[c * 16 + i + 8]);

        }

        x += 8;

        k++;

    }

}

/**

  * @brief 显示 bsp_font.h 中的汉字（宋体）

  * @param x：  起始点列坐标：0 ~ 127

  *        y:   起始点页坐标：0 ~ 7

  * @param n：  汉字在字库中的索引

  */

void OLED_Show_CN(uint8_t x, uint8_t y, uint8_t n)

{

    uint8_t i = 0;

    uint16_t k = 32 * n;

    OLED_Set_Pos(x, y);

    for (i = 0; i < 16; i++)

    {

        OLED_Write_Data(CN_16X16[k]);

        k += 1;

    }

    OLED_Set_Pos(x, y + 1);

    for (i = 0; i < 16; i++)

    {

        OLED_Write_Data(CN_16X16[k]);

        k += 1;

    }

}

#if 0

// 以下是测试程序

  OLED_Init();

  OLED_Clear();

  for (i = 3; i < 7; i++)

  {

    OLED_Show_CN((i - 3) * 16, 2, i);     // 测试显示中文

  }

  OLED_Show_String(0, 4, "hello world");  // 测试 8*16 字符

#endif

bsp_12864.h

#ifndef __BSP_12864_H

#define __BSP_12864_H

#include "i2c.h"

#define I2C_X           hi2c1

#define OLED_ADDR       0x78

#define CMD_CTRL        0X00

#define DATA_CTRL       0X40

void OLED_Init(void);

void OLED_Clear(void);

void OLED_ON(void);

void OLED_OFF(void);

void OLED_Show_String(uint8_t x, uint8_t y, uint8_t *ch);

void OLED_Show_CN(uint8_t x, uint8_t y, uint8_t n);

#endif /* __BSP_12864_H */

字库文件（部分）：

bsp_font.h

// ASCII Consolas字体

const unsigned char Consolas_8X16[] = {

    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

    0x00,0x00,0x00,0xf8,0xf8,0x00,0x00,0x00,0x00,0x00,0x00,0x11,0x1b,0x00,0x00,0x00,

    0x00,0x00,0x78,0x08,0x00,0x78,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

    0x00,0x40,0xe0,0x50,0x40,0xf0,0x50,0x40,0x00,0x04,0x1f,0x04,0x04,0x1f,0x04,0x00,

    0x00,0xe0,0xb0,0x10,0xf8,0x10,0x10,0x00,0x00,0x10,0x10,0x7f,0x11,0x13,0x0e,0x00,

    0x30,0x58,0x48,0x70,0x80,0x60,0x30,0x08,0x10,0x18,0x04,0x03,0x0c,0x12,0x12,0x0c,

    0x00,0x60,0xf0,0x90,0x90,0x70,0x00,0x00,0x04,0x1f,0x11,0x11,0x16,0x1c,0x1f,0x10,

    0x00,0x00,0x00,0x78,0x78,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

    0x00,0x00,0x80,0xe0,0x30,0x08,0x00,0x00,0x00,0x00,0x07,0x3f,0x60,0xc0,0x00,0x00,

    0x00,0x00,0x08,0x10,0xe0,0x80,0x00,0x00,0x00,0x00,0x80,0x60,0x38,0x0f,0x00,0x00,

    0x00,0x80,0xa0,0x60,0xd8,0x60,0x90,0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,

    0x00,0x00,0x00,0xc0,0xc0,0x00,0x00,0x00,0x00,0x02,0x02,0x1f,0x1f,0x02,0x02,0x02,

    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x58,0x38,0x00,0x00,0x00,

    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x02,0x02,0x02,0x00,0x00,

    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x18,0x00,0x00,0x00,

    0x00,0x00,0x00,0x00,0xc0,0x70,0x18,0x00,0x00,0x20,0x18,0x06,0x01,0x00,0x00,0x00,

    0x00,0xe0,0x30,0x10,0x10,0xb0,0xe0,0x80,0x00,0x0f,0x1a,0x13,0x11,0x18,0x0f,0x03,

    0x00,0x60,0x20,0x30,0xf0,0x00,0x00,0x00,0x00,0x10,0x10,0x10,0x1f,0x10,0x10,0x00,

    0x00,0x20,0x10,0x10,0x10,0xf0,0xe0,0x00,0x00,0x10,0x18,0x14,0x12,0x11,0x10,0x00,

    0x00,0x10,0x10,0x10,0x10,0xf0,0x60,0x00,0x00,0x10,0x11,0x11,0x11,0x19,0x0e,0x00,

    0x00,0x00,0x80,0x60,0x30,0xf0,0x00,0x00,0x04,0x07,0x05,0x04,0x04,0x1f,0x04,0x04,

    0x00,0xf0,0xf0,0x10,0x10,0x10,0x10,0x00,0x00,0x11,0x11,0x11,0x11,0x19,0x0f,0x00,

    0x00,0xc0,0x60,0x30,0x90,0x10,0x10,0x00,0x00,0x0f,0x19,0x11,0x10,0x11,0x0f,0x00,

    0x00,0x10,0x10,0x10,0x10,0xd0,0x70,0x00,0x00,0x00,0x10,0x1c,0x07,0x01,0x00,0x00,

    0x00,0x60,0xb0,0x90,0x10,0x90,0xe0,0x00,0x00,0x0e,0x12,0x11,0x11,0x13,0x0e,0x00,

    0x00,0xe0,0x30,0x10,0x10,0x30,0xe0,0x00,0x00,0x11,0x11,0x12,0x12,0x09,0x07,0x00,

    0x00,0x00,0x00,0xc0,0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x18,0x00,0x00,0x00,

    0x00,0x00,0x00,0xc0,0xc0,0x00,0x00,0x00,0x00,0x00,0x40,0x58,0x38,0x00,0x00,0x00,

    0x00,0x00,0x00,0x80,0x80,0x40,0x00,0x00,0x00,0x02,0x03,0x05,0x08,0x18,0x10,0x00,

    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x05,0x05,0x05,0x05,0x05,0x05,0x00,

    0x00,0x00,0x40,0xc0,0x80,0x00,0x00,0x00,0x00,0x00,0x10,0x08,0x04,0x07,0x02,0x00,

    0x00,0x00,0x08,0x18,0x10,0xf0,0xe0,0x00,0x00,0x00,0x00,0x1b,0x01,0x00,0x00,0x00,

    0x80,0xe0,0x10,0x88,0x88,0x88,0x10,0xe0,0x3f,0x60,0x8f,0x91,0x88,0x9f,0x08,0x0f,

    0x00,0x00,0xc0,0x70,0x30,0xe0,0x00,0x00,0x10,0x1e,0x07,0x04,0x04,0x05,0x0f,0x18,

    0x00,0xf0,0x10,0x10,0x10,0xb0,0xe0,0x00,0x00,0x1f,0x11,0x11,0x11,0x11,0x0e,0x00,

    0x00,0xc0,0x20,0x10,0x10,0x10,0x10,0x00,0x00,0x0f,0x18,0x10,0x10,0x10,0x10,0x00,

    0x00,0xf0,0x10,0x10,0x10,0x30,0xe0,0x80,0x00,0x1f,0x10,0x10,0x10,0x08,0x0f,0x03,

    0x00,0xf0,0xf0,0x10,0x10,0x10,0x10,0x00,0x00,0x1f,0x1f,0x11,0x11,0x11,0x11,0x00,