提示：文章完成后，目录可以自动生成，如何生成可以参考右边的帮助文档
文章目录
- 前言
- 什么是协议？IIC？
- 二、相关代码
- 1.main.c
- 2.oled.c
- 总结
前言
提示：此处可添加本文要记录的一般内容：
例如，随着人工智能的不断发展，机器学习技术变得越来越重要。许多人开始学习机器学习。本文介绍了机器学习的基本内容。
提示：以下是本文的文本内容，以下案例可供参考
一、IIC什么是协议？
IIC,即I2C，全称 Inter-Integrated Circuit，字面意思是集成电路之间，实际上是I2C Bus简称，所以中文应该叫 集成电路总线 ，它是一条串行通信总线，由飞利浦公司在20世纪80年代开发，使主板、嵌入式系统或手机连接低速周边设备。（百度百科全书）
main.c
代码如下(示例):
2.读入数据
#include "stm32f10x.h" #include "usart.h" #include "Delay.h" #include <stdio.h> #include "led.h" #include "systick.h" #include "HC_SR04.h" #include "motor.h" #include "oled.h" int main() { unsigned int i; I2C_Configuration();//I2C初始化 Oled_Iint()///产家给的OLED初始化代码 ms_Delay(2000); Oled_Fill(0xff);///点亮屏幕 ms_Delay(2000); Oled_Fill(0x00)；//全屏灭绝 ms_Delay(2000); OLED_ShowStr(0,3,"LZG",1); OLED_ShowStr(0,4,"Hello world",2); while(1) { for(i=0;i<3;i ) { OLED_ShowCN(22 16*i,0,i); } } } oled.c
代码如下(示例):
#include "oled.h" #include "stm32f10x.h" #include "Delay.h" #include "codetab.h" void I2C_Configuration(void) { I2C_InitTypeDef I2C_InitStructure;//I2C结构体 GPIO_InitTypeDef GPIO_InitSructure;//GPIO结构体 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE); //PB6 SCL PB7 SDA GPIO_InitSructure.GPIO_Mode= GPIO_Mode_AF_OD; GPIO_InitSructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; GPIO_InitSructure.GPIO_Speed= GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitSructure); //IC2 I2C_DeInit(I2C1); I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; //回应使能 I2C_InitStructure.I2C_AcknowledgedAddress= I2C_AcknowledgedAddress_7bit;///配置指定地址长度为7位 I2C_InitStructure.I2C_ClockSpeed = 400000///配置时钟速度为4000kbit/s I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2 ;///配置占2:1 I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;//配置为I2C模式 I2C_InitStructure.I2C_OwnAddress1= 0X30.//配置自己的设备地址，可以随便配 I2C_Init(I2C1, &I2C_InitStructure); I2C_Cmd(I2C1, ENABLE); } void I2C_WriteByte(uint8_t address,uint8_t data) { while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));//检查I2C总线是否繁忙 I2C_GenerateSTART(I2C1,ENABLE); //开启I2C1总线 while( !I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));//EV5主模式 I2C_Send7bitAddress(I2C1,OLED_ADDRESS,I2C_Direction_Transmitter);//发送器件地址 while( !I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ));//EV6 I2C_SendData(I2C1 , address);//寄存器地址 while( !I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTING));//EV8 I2C_SendData(I2C1 , data);///发送数据 while( !I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTING));//EV8 I2C_GenerateSTOP(I2C1, ENABLE);//关闭I2C总线 } //写命令 void WriteCmd(unsigned char I2C_Command) { I2C_WriteByte(0x00,I2C_Command); } //写数据 void WriteDat(unsigned char I2C_data) { I2C_WriteByte(0x40,I2C_data); } //OLED屏幕初始化 void Oled_Iint() { Delay(100); WriteCmd(0xAE); //display off WriteCmd(0x20); //Set Memory Addressing Mode WriteCmd(0x10); //00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid WriteCmd(0xb0); //Set Page Start Address for Page Addressing Mode,0-7 WriteCmd(0xc8); //Set COM Output Scan Direction WriteCmd(0x00); //---set low column address WriteCmd(0x10); //---set high column address WriteCmd(0x40); //--set start line address WriteCmd(0x81); //--set contrast control register WriteCmd(0xff); //调节亮度，0x00~0xff WriteCmd(0xa1); //--set segment re-map 0 to 127 WriteCmd(0xa6); //--set normal display WriteCmd(0xa8); //--set multiplex ratio(1 to 64) WriteCmd(0x3F); // WriteCmd(0xa4); //0xa4,Output follows RAM content;0xa5,Output ignores RAM content WriteCmd(0xd3); //-set display offset WriteCmd(0x00); //-not offset WriteCmd(0xd5); //--set display clock divide ratio/oscillator frequency WriteCmd(0xf0); //--set divide ratio WriteCmd(0xd9); //--set pre-charge period WriteCmd(0x22); // WriteCmd(0xda); //--set com pins hardware configuration WriteCmd(0x12); WriteCmd(0xdb); //--set vcomh WriteCmd(0x20); //0x20,0.77xVcc WriteCmd(0x8d); //--set DC-DC enable WriteCmd(0x14); // WriteCmd(0xaf); //--turn on oled panel } //设置起点坐标 void Oled_SetPos(unsigned char x,unsigned char y) { WriteCmd(0xb0 y);//页地址 WriteCmd((x&0xf0)>>4|0x10);//列高地址 WriteCmd((x&0x0f)|0x01) } ///全屏填充 void Oled_Fill(unsigned char Fill_Data) { unsigned char m,n; for(m=0;m<8;m ) { WriteCmd(0xb0 m); WriteCmd(0x00); WriteCmd(0x10); for(n=0;n<128;n ) {
WriteDat(Fill_Data);
}
}
}
//清屏
void Oled_CLS(void)
{
Oled_Fill(0x00);
}
//OLED打开
void Oled_ON(void)
{
WriteCmd(0x8D);//设置电荷泵
WriteCmd(0x14);//开启电荷泵
WriteCmd(0xAF);//设置显示开
}
//OLED关闭
void OLED_OFF(void)
{
WriteCmd(0x8D);//开启电荷泵
WriteCmd(0x13);//关闭电荷泵
WriteCmd(0xAE);//设置显示关
}
//显示字符串
void OLED_ShowStr(unsigned char x,unsigned char y,unsigned char ch[],unsigned char TextSize)
{
unsigned char c=0,i=0,j=0;
switch(TextSize)
{
case 1://8*6
{ while(ch[j]!='\0')
{
c=ch[j]-32;
if(x>122)
{
x=0;
y++;
}
Oled_SetPos(x,y);
for(i=0;i<6;i++)
{
WriteDat( F6x8[c][i] );
}
x+=6;
j++;
}
}break;
case 2://16*8
{
while(ch[j]!='\0')
{
c=ch[j]-32;
if(x>120)
{
x=0;
y++;
}
Oled_SetPos(x,y);
for(i=0;i<8;i++)
{
WriteDat( F8X16[c*16+i] );
}
Oled_SetPos(x,y+1);
for(i=0;i<8;i++)
{
WriteDat( F8X16[c*16+i+8] );
}
x+=8;
j++;
}
}
}
}
//显示中文,想要显示什么汉字，要用取模软件生成，放在codetab.h文件里
void OLED_ShowCN(unsigned char x,unsigned char y,unsigned char N)//N表示第几个汉字
{
unsigned char wm=0;
unsigned int addr=32*N;//一个汉字有32个Byte
Oled_SetPos(x,y);
for(wm=0;wm<16;wm++)
{
WriteDat(HZ1F16X16[addr]);
addr++;
}
Oled_SetPos(x,y+1);
for(wm=0;wm<16;wm++)
{
WriteDat( HZ1F16X16[addr]);
addr++;
}
}
//显示图片
void OLED_DrawBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char BMP[])
{
unsigned int j=0;
unsigned char x,y;
if(y1%8==0)
{
y=y1/8;
}
else
{
y=y1/8+1;
}
for(y=y0;y<y1;y++)
{
Oled_SetPos(x0,y0);
for(x=x0;x<x1;x++)
{
WriteDat(BMP[j]);
j++;
}
}
}oled.h
#ifndef _OLED_H_
#define _OLED_H_
#include "stm32f10x.h"
void I2C_Configuration(void);
void I2C_WriteByte(uint8_t address,uint8_t data);
void Writecmd(unsigned char I2C_Command);
void WriteDat(unsigned char I2C_data);
void Oled_Iint();
void Oled_SetPos(unsigned char x,unsigned char y);
void Oled_Fill(unsigned char Fill_Data);
void OLED_ShowStr(unsigned char x,unsigned char y,unsigned char ch[],unsigned char TextSize);
void OLED_ShowCN(unsigned char x,unsigned char y,unsigned char N);
void OLED_DrawBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char BMP[]);
#define OLED_ADDRESS 0x78
#endif
总结
注意字符和中文，要用取模软件进行取模，图形也要用相对于的取模软件取模，oled显示屏是八页，128列，其中每页又有8行，要注意向oled写入数据，是一竖一竖写，一竖就是一个byte，写完一竖自动跳转至下一竖开始写