【WCH】CH32F203软件I2C驱动SSD1306 OLED

【WCH】CH32F203软件I2C驱动SSD1306 OLED

• 📌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50MHzGPIO_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 panelOLED_WR_Byte(0x00, OLED_CMD); //---set low column addressOLED_WR_Byte(0x10, OLED_CMD); //---set high column addressOLED_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 registerOLED_WR_Byte(0xCF, OLED_CMD); // Set SEG Output Current BrightnessOLED_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 displayOLED_WR_Byte(0xA8, OLED_CMD); //--set multiplex ratio(1 to 64)OLED_WR_Byte(0x3f, OLED_CMD); //--1/64 dutyOLED_WR_Byte(0xD3, OLED_CMD); //-set display offset	Shift Mapping RAM Counter (0x00~0x3F)OLED_WR_Byte(0x00, OLED_CMD); //-not offsetOLED_WR_Byte(0xd5, OLED_CMD); //--set display clock divide ratio/oscillator frequencyOLED_WR_Byte(0x80, OLED_CMD); //--set divide ratio, Set Clock as 100 Frames/SecOLED_WR_Byte(0xD9, OLED_CMD); //--set pre-charge periodOLED_WR_Byte(0xF1, OLED_CMD); //Set Pre-Charge as 15 Clocks & Discharge as 1 ClockOLED_WR_Byte(0xDA, OLED_CMD); //--set com pins hardware configurationOLED_WR_Byte(0x12, OLED_CMD);OLED_WR_Byte(0xDB, OLED_CMD); //--set vcomhOLED_WR_Byte(0x40, OLED_CMD); //Set VCOM Deselect LevelOLED_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/disableOLED_WR_Byte(0x14, OLED_CMD); //--set(0x10) disableOLED_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.
*//@NoteI2C1_SCL(PB8)\\I2C1_SDA(PB9).Hardware connection:PB8--sclPB9--sda*/#include "debug.h"
//#include <stdio.h>
#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