【WCH】CH32F203软件I2C驱动SSD1306 OLED

【WCH】CH32F203软件I2C驱动SSD1306 OLED

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• 相关篇《【WCH】CH32F203硬件I2C驱动SSD1306 OLED》
• 驱动显示效果：
  
• OLED屏幕：i2c ssd1306 oled
• 驱动单片机型号：CH32F203

• ✨由于CH32F203主频为96MHz，测试了144MHz下也可以驱动显示。如果是从屏幕厂商提供的程序，需要修改相应的延时时间来匹配通讯时序。
  

引脚定义

 I2C1_SCL(PB8)
 I2C1_SDA(PB9).

OLED驱动程序

• oled.c

#include "oled.h"
#include "oledfont.h"

static u8 OLED_GRAM[144][8];


void OLED_ColorTurn(u8 i)//反显函数
{
    if(i == 0)
    {
        OLED_WR_Byte(0xA6, OLED_CMD); //正常显示
    }
    if(i == 1)
    {
        OLED_WR_Byte(0xA7, OLED_CMD); //反色显示
    }
}

//屏幕旋转180度
void OLED_DisplayTurn(u8 i)
{
    if(i == 0)
    {
        OLED_WR_Byte(0xC8, OLED_CMD); //正常显示
        OLED_WR_Byte(0xA1, OLED_CMD);
    }
    if(i == 1)
    {
        OLED_WR_Byte(0xC0, OLED_CMD); //反转显示
        OLED_WR_Byte(0xA0, OLED_CMD);
    }
}

//延时
static void IIC_delay(void)
{
    u8 t = 3*10;
    while(t--);
}

//起始信号
static void I2C_Start(void)
{
    OLED_SDA_Set();
    OLED_SCL_Set();
    IIC_delay();
    OLED_SDA_Clr();
    IIC_delay();
    OLED_SCL_Clr();
    IIC_delay();
}

//结束信号
static void I2C_Stop(void)
{
    OLED_SDA_Clr();
    OLED_SCL_Set();
    IIC_delay();
    OLED_SDA_Set();
}

//等待信号响应
static void I2C_WaitAck(void) //测数据信号的电平
{
    OLED_SDA_Set();
    IIC_delay();
    OLED_SCL_Set();
    IIC_delay();
    OLED_SCL_Clr();
    IIC_delay();
}

//写入一个字节
static void Send_Byte(u8 dat)
{
    u8 i;
    for(i = 0; i < 8; i++)
    {
        if(dat & 0x80) //将dat的8位从最高位依次写入
        {
            OLED_SDA_Set();
        }
        else
        {
            OLED_SDA_Clr();
        }
        IIC_delay();
        OLED_SCL_Set();
        IIC_delay();
        OLED_SCL_Clr();//将时钟信号设置为低电平
        dat <<= 1;
    }
}

//发送一个字节
//mode:数据/命令标志 0,表示命令;1,表示数据;
static void OLED_WR_Byte(u8 dat, u8 mode)
{
    I2C_Start();
    Send_Byte(0x78);
    I2C_WaitAck();
    if(mode)
    {
        Send_Byte(0x40);
    }
    else
    {
        Send_Byte(0x00);
    }
    I2C_WaitAck();
    Send_Byte(dat);
    I2C_WaitAck();
    I2C_Stop();
}

//开启OLED显示
void OLED_DisPlay_On(void)
{
    OLED_WR_Byte(0x8D, OLED_CMD); //电荷泵使能
    OLED_WR_Byte(0x14, OLED_CMD); //开启电荷泵
    OLED_WR_Byte(0xAF, OLED_CMD); //点亮屏幕
}

//关闭OLED显示
void OLED_DisPlay_Off(void)
{
    OLED_WR_Byte(0x8D, OLED_CMD); //电荷泵使能
    OLED_WR_Byte(0x10, OLED_CMD); //关闭电荷泵
    OLED_WR_Byte(0xAE, OLED_CMD); //关闭屏幕
}

//更新显存到OLED
void OLED_Refresh(void)
{
    u8 i, n;
    for(i = 0; i < 8; i++)
    {
        OLED_WR_Byte(0xb0 + i, OLED_CMD); //设置行起始地址
        OLED_WR_Byte(0x00, OLED_CMD);  //设置低列起始地址
        OLED_WR_Byte(0x10, OLED_CMD);  //设置高列起始地址
        I2C_Start();
        Send_Byte(0x78);
        I2C_WaitAck();
        Send_Byte(0x40);
        I2C_WaitAck();
        for(n = 0; n < 128; n++)
        {
            Send_Byte(OLED_GRAM[n][i]);
            I2C_WaitAck();
        }
        I2C_Stop();
    }
}
//清屏函数
void OLED_Clear(void)
{
    u8 i, n;
    for(i = 0; i < 8; i++)
    {
        for(n = 0; n < 128; n++)
        {
            OLED_GRAM[n][i] = 0; //清除所有数据
        }
    }
    OLED_Refresh();//更新显示
}

//画点
//x:0~127
//y:0~63
//t:1 填充 0,清空
void OLED_DrawPoint(u8 x, u8 y, u8 t)
{
    u8 i, m, n;
    i = y / 8;
    m = y % 8;
    n = 1 << m;
    if(t)
    {
        OLED_GRAM[x][i] |= n;
    }
    else
    {
        OLED_GRAM[x][i] = ~OLED_GRAM[x][i];
        OLED_GRAM[x][i] |= n;
        OLED_GRAM[x][i] = ~OLED_GRAM[x][i];
    }
}

//画线
//x1,y1:起点坐标
//x2,y2:结束坐标
void OLED_DrawLine(u8 x1, u8 y1, u8 x2, u8 y2, u8 mode)
{
    u16 t;
    int xerr = 0, yerr = 0, delta_x, delta_y, distance;
    int incx, incy, uRow, uCol;
    delta_x = x2 - x1; //计算坐标增量
    delta_y = y2 - y1;
    uRow = x1; //画线起点坐标
    uCol = y1;
    if(delta_x > 0)incx = 1; //设置单步方向
    else if(delta_x == 0)incx = 0; //垂直线
    else
    {
        incx = -1;
        delta_x = -delta_x;
    }
    if(delta_y > 0)incy = 1;
    else if(delta_y == 0)incy = 0; //水平线
    else
    {
        incy = -1;
        delta_y = -delta_x;
    }
    if(delta_x > delta_y)distance = delta_x; //选取基本增量坐标轴
    else distance = delta_y;
    for(t = 0; t < distance + 1; t++)
    {
        OLED_DrawPoint(uRow, uCol, mode); //画点
        xerr += delta_x;
        yerr += delta_y;
        if(xerr > distance)
        {
            xerr -= distance;
            uRow += incx;
        }
        if(yerr > distance)
        {
            yerr -= distance;
            uCol += incy;
        }
    }
}
//x,y:圆心坐标
//r:圆的半径
void OLED_DrawCircle(u8 x, u8 y, u8 r)
{
    int a, b, num;
    a = 0;
    b = r;
    while(2 * b * b >= r * r)
    {
        OLED_DrawPoint(x + a, y - b, 1);
        OLED_DrawPoint(x - a, y - b, 1);
        OLED_DrawPoint(x - a, y + b, 1);
        OLED_DrawPoint(x + a, y + b, 1);

        OLED_DrawPoint(x + b, y + a, 1);
        OLED_DrawPoint(x + b, y - a, 1);
        OLED_DrawPoint(x - b, y - a, 1);
        OLED_DrawPoint(x - b, y + a, 1);

        a++;
        num = (a * a + b * b) - r * r; //计算画的点离圆心的距离
        if(num > 0)
        {
            b--;
            a--;
        }
    }
}



//在指定位置显示一个字符,包括部分字符
//x:0~127
//y:0~63
//size1:选择字体 6x8/6x12/8x16/12x24
//mode:0,反色显示;1,正常显示
void OLED_ShowChar(u8 x, u8 y, u8 chr, u8 size1, u8 mode)
{
    u8 i, m, temp, size2, chr1;
    u8 x0 = x, y0 = y;
    if(size1 == 8)size2 = 6;
    else size2 = (size1 / 8 + ((size1 % 8) ? 1 : 0)) * (size1 / 2); //得到字体一个字符对应点阵集所占的字节数
    chr1 = chr - ' '; //计算偏移后的值
    for(i = 0; i < size2; i++)
    {
        if(size1 == 8)
        {
            temp = asc2_0806[chr1][i];   //调用0806字体
        }
        else if(size1 == 12)
        {
            temp = asc2_1206[chr1][i];   //调用1206字体
        }
        else if(size1 == 16)
        {
            temp = asc2_1608[chr1][i];   //调用1608字体
        }
        else if(size1 == 24)
        {
            temp = asc2_2412[chr1][i];   //调用2412字体
        }
        else return;
        for(m = 0; m < 8; m++)
        {
            if(temp & 0x01)OLED_DrawPoint(x, y, mode);
            else OLED_DrawPoint(x, y, !mode);
            temp >>= 1;
            y++;
        }
        x++;
        if((size1 != 8) && ((x - x0) == size1 / 2))
        {
            x = x0;
            y0 = y0 + 8;
        }
        y = y0;
    }
}


//显示字符串
//x,y:起点坐标
//size1:字体大小
//*chr:字符串起始地址
//mode:0,反色显示;1,正常显示
void OLED_ShowString(u8 x, u8 y, u8* chr, u8 size1, u8 mode)
{
    while((*chr >= ' ') && (*chr <= '~')) //判断是不是非法字符!
    {
        OLED_ShowChar(x, y, *chr, size1, mode);
        if(size1 == 8)x += 6;
        else x += size1 / 2;
        chr++;
    }
}

//m^n
static u32 OLED_Pow(u8 m, u8 n)
{
    u32 result = 1;
    while(n--)
    {
        result *= m;
    }
    return result;
}

//显示数字
//x,y :起点坐标
//num :要显示的数字
//len :数字的位数
//size:字体大小
//mode:0,反色显示;1,正常显示
void OLED_ShowNum(u8 x, u8 y, u32 num, u8 len, u8 size1, u8 mode)
{
    u8 t, temp, m = 0;
    if(size1 == 8)m = 2;
    for(t = 0; t < len; t++)
    {
        temp = (num / OLED_Pow(10, len - t - 1)) % 10;
        if(temp == 0)
        {
            OLED_ShowChar(x + (size1 / 2 + m)*t, y, '0', size1, mode);
        }
        else
        {
            OLED_ShowChar(x + (size1 / 2 + m)*t, y, temp + '0', size1, mode);
        }
    }
}

//显示汉字
//x,y:起点坐标
//num:汉字对应的序号
//mode:0,反色显示;1,正常显示
void OLED_ShowChinese(u8 x, u8 y, u8 num, u8 size1, u8 mode)
{
    u8 m, temp;
    u8 x0 = x, y0 = y;
    u16 i, size3 = (size1 / 8 + ((size1 % 8) ? 1 : 0)) * size1; //得到字体一个字符对应点阵集所占的字节数
    for(i = 0; i < size3; i++)
    {
        if(size1 == 16)
        {
            temp = Hzk1[num][i];   //调用16*16字体
        }
        else if(size1 == 24)
        {
            temp = Hzk2[num][i];   //调用24*24字体
        }
        else if(size1 == 32)
        {
            temp = Hzk3[num][i];   //调用32*32字体
        }
        else if(size1 == 64)
        {
            temp = Hzk4[num][i];   //调用64*64字体
        }
        else return;
        for(m = 0; m < 8; m++)
        {
            if(temp & 0x01)OLED_DrawPoint(x, y, mode);
            else OLED_DrawPoint(x, y, !mode);
            temp >>= 1;
            y++;
        }
        x++;
        if((x - x0) == size1)
        {
            x = x0;
            y0 = y0 + 8;
        }
        y = y0;
    }
}
//默认左移
//num 显示汉字的个数
//space 每一遍显示的间隔
//mode:0,反色显示;1,正常显示
void OLED_ScrollDisplay(u8 num, u8 space, u8 mode)
{
    u8 i, n, t = 0, m = 0, r;
    while(1)
    {
        if(m == 0)
        {
            OLED_ShowChinese(128, 0, t, 16, mode); //写入一个汉字保存在OLED_GRAM[][]数组中
            t++;
        }
        if(t == num)
        {
            for(r = 0; r < 16 * space; r++) //显示间隔
            {
                for(i = 1; i < 144; i++)
                {
                    for(n = 0; n < 8; n++)
                    {
                        OLED_GRAM[i - 1][n] = OLED_GRAM[i][n];
                    }
                }
                OLED_Refresh();
            }
            t = 0;
        }
        m++;
        if(m == 16)
        {
            m = 0;
        }
        for(i = 1; i < 144; i++) //实现左移
        {
            for(n = 0; n < 8; n++)
            {
                OLED_GRAM[i - 1][n] = OLED_GRAM[i][n];
            }
        }
        OLED_Refresh();
    }
}



//x,y：起点坐标
//sizex,sizey,图片长宽
//BMP[]：要写入的图片数组
//mode:0,反色显示;1,正常显示
void OLED_ShowPicture(u8 x, u8 y, u8 sizex, u8 sizey, u8 BMP[], u8 mode)
{
    u16 j = 0;
    u8 i, n, temp, m;
    u8 x0 = x, y0 = y;
    sizey = sizey / 8 + ((sizey % 8) ? 1 : 0);
    for(n = 0; n < sizey; n++)
    {
        for(i = 0; i < sizex; i++)
        {
            temp = BMP[j];
            j++;
            for(m = 0; m < 8; m++)
            {
                if(temp & 0x01)OLED_DrawPoint(x, y, mode);
                else OLED_DrawPoint(x, y, !mode);
                temp >>= 1;
                y++;
            }
            x++;
            if((x - x0) == sizex)
            {
                x = x0;
                y0 = y0 + 8;
            }
            y = y0;
        }
    }
}
//OLED的初始化
void OLED_Init(void)
{
    GPIO_InitTypeDef  GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD, ENABLE);	 //使能A端口时钟
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//速度50MHz
    GPIO_Init(GPIOB, &GPIO_InitStructure);
    GPIO_SetBits(GPIOB, GPIO_Pin_8 | GPIO_Pin_9);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(GPIOC, &GPIO_InitStructure);
    GPIO_SetBits(GPIOC, GPIO_Pin_12);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(GPIOD, &GPIO_InitStructure);
    GPIO_SetBits(GPIOD, GPIO_Pin_2);

    OLED_RES_Clr();
    Delay_Ms(200);
    OLED_RES_Set();

    OLED_WR_Byte(0xAE, OLED_CMD); //--turn off oled panel
    OLED_WR_Byte(0x00, OLED_CMD); //---set low column address
    OLED_WR_Byte(0x10, OLED_CMD); //---set high column address
    OLED_WR_Byte(0x40, OLED_CMD); //--set start line address  Set Mapping RAM Display Start Line (0x00~0x3F)
    OLED_WR_Byte(0x81, OLED_CMD); //--set contrast control register
    OLED_WR_Byte(0xCF, OLED_CMD); // Set SEG Output Current Brightness
    OLED_WR_Byte(0xA1, OLED_CMD); //--Set SEG/Column Mapping     0xa0左右反置 0xa1正常
    OLED_WR_Byte(0xC8, OLED_CMD); //Set COM/Row Scan Direction   0xc0上下反置 0xc8正常
    OLED_WR_Byte(0xA6, OLED_CMD); //--set normal display
    OLED_WR_Byte(0xA8, OLED_CMD); //--set multiplex ratio(1 to 64)
    OLED_WR_Byte(0x3f, OLED_CMD); //--1/64 duty
    OLED_WR_Byte(0xD3, OLED_CMD); //-set display offset	Shift Mapping RAM Counter (0x00~0x3F)
    OLED_WR_Byte(0x00, OLED_CMD); //-not offset
    OLED_WR_Byte(0xd5, OLED_CMD); //--set display clock divide ratio/oscillator frequency
    OLED_WR_Byte(0x80, OLED_CMD); //--set divide ratio, Set Clock as 100 Frames/Sec
    OLED_WR_Byte(0xD9, OLED_CMD); //--set pre-charge period
    OLED_WR_Byte(0xF1, OLED_CMD); //Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
    OLED_WR_Byte(0xDA, OLED_CMD); //--set com pins hardware configuration
    OLED_WR_Byte(0x12, OLED_CMD);
    OLED_WR_Byte(0xDB, OLED_CMD); //--set vcomh
    OLED_WR_Byte(0x40, OLED_CMD); //Set VCOM Deselect Level
    OLED_WR_Byte(0x20, OLED_CMD); //-Set Page Addressing Mode (0x00/0x01/0x02)
    OLED_WR_Byte(0x02, OLED_CMD); //
    OLED_WR_Byte(0x8D, OLED_CMD); //--set Charge Pump enable/disable
    OLED_WR_Byte(0x14, OLED_CMD); //--set(0x10) disable
    OLED_WR_Byte(0xA4, OLED_CMD); // Disable Entire Display On (0xa4/0xa5)
    OLED_WR_Byte(0xA6, OLED_CMD); // Disable Inverse Display On (0xa6/a7)
    OLED_Clear();
    OLED_WR_Byte(0xAF, OLED_CMD);
}

• oled.h

#ifndef __OLED_H
#define __OLED_H 


#include "debug.h"
#include "stdlib.h"

//-----------------OLED端口定义---------------- 

#define OLED_SCL_Clr() GPIO_ResetBits(GPIOB,GPIO_Pin_8)//SCL
#define OLED_SCL_Set() GPIO_SetBits(GPIOB,GPIO_Pin_8)

#define OLED_SDA_Clr() GPIO_ResetBits(GPIOB,GPIO_Pin_9)//SDA
#define OLED_SDA_Set() GPIO_SetBits(GPIOB,GPIO_Pin_9)

#define OLED_RES_Clr() GPIO_ResetBits(GPIOA,GPIO_Pin_2)//RES
#define OLED_RES_Set() GPIO_SetBits(GPIOA,GPIO_Pin_2)


#define OLED_CMD  0	//写命令
#define OLED_DATA 1	//写数据

void OLED_ClearPoint(u8 x,u8 y);
void OLED_ColorTurn(u8 i);
void OLED_DisplayTurn(u8 i);
static void I2C_Start(void);
static void I2C_Stop(void);
static void I2C_WaitAck(void);
static void Send_Byte(u8 dat);
static void OLED_WR_Byte(u8 dat,u8 mode);
void OLED_DisPlay_On(void);
void OLED_DisPlay_Off(void);
void OLED_Refresh(void);
void OLED_Clear(void);
void OLED_DrawPoint(u8 x,u8 y,u8 t);
void OLED_DrawLine(u8 x1,u8 y1,u8 x2,u8 y2,u8 mode);
void OLED_DrawCircle(u8 x,u8 y,u8 r);
void OLED_ShowChar(u8 x,u8 y,u8 chr,u8 size1,u8 mode);
void OLED_ShowChar6x8(u8 x,u8 y,u8 chr,u8 mode);
void OLED_ShowString(u8 x,u8 y,u8 *chr,u8 size1,u8 mode);
void OLED_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 size1,u8 mode);
void OLED_ShowChinese(u8 x,u8 y,u8 num,u8 size1,u8 mode);
void OLED_ScrollDisplay(u8 num,u8 space,u8 mode);
void OLED_ShowPicture(u8 x,u8 y,u8 sizex,u8 sizey,u8 BMP[],u8 mode);
void OLED_Init(void);

#endif

main主程序代码

/********************************** (C) COPYRIGHT *******************************
* File Name          : main.c
* Author             : WCH
* Version            : V1.0.0
* Date               : 2021/08/08
* Description        : Main program body.
*********************************************************************************
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
* Attention: This software (modified or not) and binary are used for
* microcontroller manufactured by Nanjing Qinheng Microelectronics.
*******************************************************************************/

/*
 *@Note
 I2C1_SCL(PB8)\I2C1_SDA(PB9).
     Hardware connection:
		           PB8--scl
               PB9--sda

*/

#include "debug.h"
//#include 
#include "oled.h"
#include "bmp.h"




/*********************************************************************
 * @fn      main
 *
 * @brief   Main program.
 *
 * @return  none
 */
int main(void)
{
    u8 t = ' ';
    Delay_Init();//延时函数初始化
    USART_Printf_Init(115200);
    printf("SystemClk:%d\r\n", SystemCoreClock);

    OLED_Init();
    printf("Init \r\n");
    OLED_ColorTurn(0);//0正常显示，1 反色显示
    OLED_DisplayTurn(0);//0正常显示 1 屏幕翻转显示
    OLED_DrawPoint(15, 15, 1);
    OLED_Refresh();
    while(1)
    {
        OLED_ShowPicture(0, 0, 128, 64, BMP1, 1);
        OLED_Refresh();
        Delay_Ms(500);
        OLED_Clear();
        OLED_ShowChinese(0, 0, 0, 16, 1); //中
        OLED_ShowChinese(18, 0, 1, 16, 1); //景
        OLED_ShowChinese(36, 0, 2, 16, 1); //园
        OLED_ShowChinese(54, 0, 3, 16, 1); //电
        OLED_ShowChinese(72, 0, 4, 16, 1); //子
        OLED_ShowChinese(90, 0, 5, 16, 1); //技
        OLED_ShowChinese(108, 0, 6, 16, 1); //术
        OLED_ShowString(8, 16, "ZHONGJINGYUAN", 16, 1);
        OLED_ShowString(20, 32, "2014/05/01", 16, 1);
        OLED_ShowString(0, 48, "ASCII:", 16, 1);
        OLED_ShowString(63, 48, "CODE:", 16, 1);
        OLED_ShowChar(48, 48, t, 16, 1); //显示ASCII字符
        t++;
        if(t > '~')t = ' ';
        OLED_ShowNum(103, 48, t, 3, 16, 1);
        OLED_Refresh();
        Delay_Ms(500);
        OLED_Clear();
        OLED_ShowChinese(0, 0, 0, 16, 1); //16*16 中
        OLED_ShowChinese(16, 0, 0, 24, 1); //24*24 中
        OLED_ShowChinese(24, 20, 0, 32, 1); //32*32 中
        OLED_ShowChinese(64, 0, 0, 64, 1); //64*64 中
        OLED_Refresh();
        Delay_Ms(500);
        OLED_Clear();
        OLED_ShowString(0, 0, "ABC", 8, 1); //6*8 “ABC”
        OLED_ShowString(0, 8, "ABC", 12, 1); //6*12 “ABC”
        OLED_ShowString(0, 20, "ABC", 16, 1); //8*16 “ABC”
        OLED_ShowString(0, 36, "ABC", 24, 1); //12*24 “ABC”
        OLED_Refresh();
        OLED_Clear();
        Delay_Ms(500);
        OLED_ScrollDisplay(11, 3, 1);//向左滚动显示

    }
}

程序源码

链接: https://pan.baidu.com/s/1cbO7UWMScK3WeGFZpwiskQ
提取码: g85n