移植IIC 0.96OLED(SSD1306)驱动到MicropPython(esp32)

移植IIC 0.96OLED(SSD1306)驱动到MicropPython(esp32)

概述

因为esp32 micropython中没有SSD_1306驱动代码遂决定移植arduino平台中驱动代码到micropython

arduino平台驱动代码

//定义类
CN_SSD1306::CN_SSD1306(int sda, int scl)
{_sda = sda;_scl = scl;pinMode(sda, OUTPUT);pinMode(scl, OUTPUT);
}

每次开启关闭iic总线可以节省cpu负担

//开启IIC总线
void CN_SSD1306::IIC_Start()
{digitalWrite(_scl, HIGH);digitalWrite(_sda, HIGH);digitalWrite(_sda, LOW);digitalWrite(_scl, LOW);
}
//停止IIC总线
void CN_SSD1306::IIC_Stop()
{digitalWrite(_scl, LOW);digitalWrite(_sda, LOW);digitalWrite(_scl, HIGH);digitalWrite(_sda, HIGH);
}

向iic总线写一比特数据

//通过IIC写一个8位的数据,比如0xff
void CN_SSD1306::Write_IIC_Byte(unsigned char IIC_Byte)
{unsigned char i;for(i=0;i<8;i++){if((IIC_Byte << i) & 0x80)digitalWrite(_sda, HIGH);elsedigitalWrite(_sda, LOW);digitalWrite(_scl, HIGH);digitalWrite(_scl, LOW);
//    IIC_Byte<<=1;}digitalWrite(_sda, HIGH);digitalWrite(_scl, HIGH);digitalWrite(_scl, LOW);
}

//IIC写命令 -- 命令操作很少，对速度影响不大
void CN_SSD1306::Write_IIC_Command(unsigned char IIC_Command)
{IIC_Start();Write_IIC_Byte(0x78);  //Slave address,SA0=0Write_IIC_Byte(0x00);	//write commandWrite_IIC_Byte(IIC_Command);IIC_Stop();
}
//开始IIC写数据 -- 这样可以让一组数据发送完成后再关闭IIC，能很大程度提速
void CN_SSD1306::Begin_IIC_Data()
{IIC_Start();Write_IIC_Byte(0x78);Write_IIC_Byte(0x40);	//write data
}

设置起始点坐标

//设置起始点坐标
void CN_SSD1306::IIC_SetPos(unsigned char x, unsigned char y)
{IIC_Start();Write_IIC_Byte(0x78);  //Slave address,SA0=0Write_IIC_Byte(0x00);	//write commandWrite_IIC_Byte(0xb0+y);Write_IIC_Byte(((x&0xf0)>>4)|0x10);//|0x10Write_IIC_Byte((x&0x0f)|0x01);//|0x01IIC_Stop();//SetPos函数经常被使用,所以采用了这种发送一组命令再关闭IIC总线的方式
}

//全屏显示 -- Fill_Screen(0x00)可用作清屏
void CN_SSD1306::Fill_Screen(unsigned char fill_Data)
{unsigned char m,n;for(m=0;m<8;m++){Write_IIC_Command(0xb0+m);	//page0-page1Write_IIC_Command(0x00);		//low column start addressWrite_IIC_Command(0x10);		//high column start addressBegin_IIC_Data();for(n=0;n<128;n++){Write_IIC_Byte(fill_Data);}IIC_Stop();}
}

可用于16*16中文

//显示16x16的中文
void CN_SSD1306::ShowCN(unsigned char x, unsigned char y, unsigned char N){unsigned char wm=0;unsigned int adder=32*N;IIC_SetPos(x , y);Begin_IIC_Data();for(wm = 0;wm < 16;wm++){Write_IIC_Byte(CN16x16[adder]);adder += 1;}IIC_Stop();IIC_SetPos(x,y + 1);Begin_IIC_Data();for(wm = 0;wm < 16;wm++){Write_IIC_Byte(CN16x16[adder]);adder += 1;}IIC_Stop();}

可用于显示8*16英文或数字

void CN_SSD1306::Show_8(unsigned char x, unsigned char y, unsigned char N)
{unsigned char wm=0;unsigned int adder=16*N;IIC_SetPos(x , y);Begin_IIC_Data();for(wm = 0;wm < 8;wm++){Write_IIC_Byte(CN16x8[adder]);adder += 1;}IIC_Stop();IIC_SetPos(x,y + 1);Begin_IIC_Data();for(wm = 0;wm < 8;wm++){Write_IIC_Byte(CN16x8[adder]);adder += 1;}IIC_Stop();
}

//SSD1306初始化
void CN_SSD1306::Initial()
{Write_IIC_Command(0xAE);//display offWrite_IIC_Command(0x00);//set lower column addressWrite_IIC_Command(0x10);//set higher column addressWrite_IIC_Command(0x40);//set display start lineWrite_IIC_Command(0xB0);//set page addressWrite_IIC_Command(0x81);//对比度设置Write_IIC_Command(0xCF);//0~255（对比度值……效果不是特别明显）Write_IIC_Command(0xA1);//set segment remapWrite_IIC_Command(0xA6);//normal / reverseWrite_IIC_Command(0xA8);//multiplex ratioWrite_IIC_Command(0x3F);//duty = 1/64Write_IIC_Command(0xC8);//Com scan directionWrite_IIC_Command(0xD3);//set display offsetWrite_IIC_Command(0x00);Write_IIC_Command(0xD5);//set osc divisionWrite_IIC_Command(0x80);Write_IIC_Command(0xD9);//set pre-charge periodWrite_IIC_Command(0xF1);Write_IIC_Command(0xDA);//set COM pinsWrite_IIC_Command(0x12);Write_IIC_Command(0xDB);//set vcomhWrite_IIC_Command(0x40);Write_IIC_Command(0x8D);//set charge pump enableWrite_IIC_Command(0x14);Write_IIC_Command(0xAF);//display ON
}

移植后

myiic.py

from machine import Pin, I2Cclass IIC(object):#初始化相关引脚def __init__(self, sda=21, scl=22):self.i2c = I2C(scl=scl, sda=sda, freq=400000)#启动iic总线def IIC_Start(self):self.i2c.start()#关闭iic总线def IIC_Stop(self):self.i2c.stop()#写8位数据def Write_IIC_Byte(self, IIC_Byte: hex):self.i2c.write(IIC_Byte)#oled写命令def Write_IIC_Command(self, IIC_Command: hex):self.IIC_Start()self.Write_IIC_Byte(0x78)self.Write_IIC_Byte(0x00)self.Write_IIC_Byte(IIC_Command)self.IIC_Stop()#oled写数据def Write_IIC_Data(self, IIC_Data: hex):self.IIC_Start()self.Write_IIC_Byte(0x78)self.Write_IIC_Byte(0x40)self.Write_IIC_Byte(IIC_Data)self.IIC_Stop()#开始IIC写数据 -- 这样可以让一组数据发送完成后再关闭IIC，能很大程度提速def Begin_IIC_Data(self):self.IIC_Start()self.Write_IIC_Byte(0x78)self.Write_IIC_Byte(0x40)

myoled.py

from myIIC import IICI2C = IICBMP1 = [0x00, 0x80, 0x60, 0xF8, 0x07, 0x40, 0x20, 0x18, 0x0F, 0x08, 0xC8, 0x08, 0x08, 0x28, 0x18, 0x00,0x01, 0x00, 0x00, 0xFF, 0x00, 0x10, 0x0C, 0x03, 0x40, 0x80, 0x7F, 0x00, 0x01, 0x06, 0x18, 0x00,0x10, 0x10, 0xF0, 0x1F, 0x10, 0xF0, 0x00, 0x80, 0x82, 0x82, 0xE2, 0x92, 0x8A, 0x86, 0x80, 0x00,0x40, 0x22, 0x15, 0x08, 0x16, 0x61, 0x00, 0x00, 0x40, 0x80, 0x7F, 0x00, 0x00, 0x00, 0x00, 0x00]class OLED(object):def __init__(self):self.i2c = I2C(sda=21, scl=22)def OLED_Init(self):self.i2c.Write_IIC_Command(0xae)  #  关显示self.i2c.Write_IIC_Command(0xd5)  #  设置显示时钟分频率、振荡器频率self.i2c.Write_IIC_Command(0x80)  #  A[ty77:0]: 分频频率1到16，A[7:4]频率self.i2c.Write_IIC_Command(0xa8)  #  duty设置self.i2c.Write_IIC_Command(0x3f)  #  duty = 1 / 64self.i2c.Write_IIC_Command(0xd3)  #  显示偏移self.i2c.Write_IIC_Command(0x00)  #  不偏移self.i2c.Write_IIC_Command(0x40)  #  起始行40~7Fself.i2c.Write_IIC_Command(0x8d)  #  升压允许self.i2c.Write_IIC_Command(0x14)  #self.i2c.Write_IIC_Command(0x20)  #  设置内存地址模式self.i2c.Write_IIC_Command(0x02)  #  00水平地址模式，01垂直模式，02页地址模式，self.i2c.Write_IIC_Command(0xc8)  #  行扫描顺序：从上到下c8 // 上下颠倒c0self.i2c.Write_IIC_Command(0xa1)  #  列扫描顺序：从左到右a1 // 左右翻转a0self.i2c.Write_IIC_Command(0xda)  #self.i2c.Write_IIC_Command(0x12)  #self.i2c.Write_IIC_Command(0x81)  #  微调对比度, 本指令的0x81不要改动，改下面的值self.i2c.Write_IIC_Command(0xcf)  #  微调对比度的值，可设置范围0x00～0xffself.i2c.Write_IIC_Command(0xd9)  # self.i2c.Write_IIC_Command(0xf1)  #self.i2c.Write_IIC_Command(0xdb)  #self.i2c.Write_IIC_Command(0x40)  #self.i2c.Write_IIC_Command(0xaf)  #  开显示#设置起始点坐标def OLED_SetPos(self, x, y):self.i2c.IIC_Start()self.i2c.Write_IIC_Byte(0x78)self.i2c.Write_IIC_Byte(0x00)self.i2c.Write_IIC_Byte(0xb0 + y)self.i2c.Write_IIC_Byte(((x & 0xf0) >> 4) | 0x10)self.i2c.Write_IIC_Byte((x & 0x0f))  # | 0x01)self.i2c.IIC_Stop()#显示16*16中文def Show_16(self, x, y, N):adder = 32 * Nself.OLED_SetPos(x, y)self.i2c.Begin_IIC_Data()for wm in range(0, 16):self.i2c.Write_IIC_Byte(BMP1[adder])adder += 1self.i2c.IIC_Stop()self.OLED_SetPos(x, y + 1)self.i2c.Begin_IIC_Data()for wm in range(0, 16):self.i2c.Write_IIC_Byte(BMP1[adder])adder += 1self.i2c.IIC_Stop()#刷屏def Fill_Screen(self, fill_Data):for m in range(0, 8):self.i2c.Write_IIC_Command(0xb0 + m)  # page0-page1self.i2c.Write_IIC_Command(0x00)  # low column start addressself.i2c.Write_IIC_Command(0x10)  # high column start addressself.i2c.Begin_IIC_Data()  #for n in range(0, 128):self.i2c.Write_IIC_Byte(fill_Data)  #self.i2c.IIC_Stop()  #