STM32F1之4线IIC_OLED源程序 -

#include "oled.h"
#include "codetab.h"
#include "delay.h"
/**************************实现函数********************************************
*函数原型: void IIC_Start(void)
*功　　能: 产生IIC起始信号
*******************************************************************************/
void OLED_IIC_Start(void)
{
OLED_IIC_SDA=1;
OLED_IIC_SCL=1;
delay_us(1);
OLED_IIC_SDA=0;
delay_us(1);
OLED_IIC_SCL=0;//钳住I2C总线，准备发送或接收数据
}
/**************************实现函数********************************************
*函数原型: void IIC_Stop(void)
*功　　能: //产生IIC停止信号
*******************************************************************************/
void OLED_IIC_Stop(void)
{
OLED_IIC_SCL=0;
OLED_IIC_SDA=0;//STOP:when CLK is high DATA change form low to high
delay_us(1);
OLED_IIC_SCL=1;
OLED_IIC_SDA=1;//发送I2C总线结束信号
delay_us(1);
}
void Write_IIC_Byte(unsigned char IIC_Byte)
{
unsigned char i;
for(i=0;i<8;i++)
{
if(IIC_Byte & 0x80)
OLED_IIC_SDA=1;
else
OLED_IIC_SDA=0;
OLED_IIC_SCL=1;
delay_us(1); //必须有保持SCL脉冲的延时
OLED_IIC_SCL=0;
IIC_Byte<<=1;
}
OLED_IIC_SDA = 1;//原程序这里有一个拉高SDA，根据OLED的DATASHEET，此句必须去掉。
OLED_IIC_SCL=1;
delay_us(1);
OLED_IIC_SCL=0;
}
/*********************OLED写数据************************************/
void OLED_WrDat(unsigned char IIC_Data)
{
OLED_IIC_Start();
Write_IIC_Byte(0x78);
Write_IIC_Byte(0x40); //write data
Write_IIC_Byte(IIC_Data);
OLED_IIC_Stop();
}
/*********************OLED写命令************************************/
void OLED_WrCmd(unsigned char IIC_Command)
{
OLED_IIC_Start();
Write_IIC_Byte(0x78); //Slave address,SA0=0
Write_IIC_Byte(0x00); //write command
Write_IIC_Byte(IIC_Command);
OLED_IIC_Stop();
}
/*********************OLED 设置坐标************************************/
void OLED_Set_Pos(unsigned char x, unsigned char y)
{
OLED_WrCmd(0xb0+y);
OLED_WrCmd(((x&0xf0)>>4)|0x10);
OLED_WrCmd((x&0x0f)|0x01);
}
/*********************OLED全屏************************************/
void OLED_Fill(unsigned char bmp_dat)
{
unsigned char y,x;
for(y=0;y<8;y++)
{
OLED_WrCmd(0xb0+y);
OLED_WrCmd(0x01);
OLED_WrCmd(0x10);
for(x=0;x<X_WIDTH;x++)
OLED_WrDat(bmp_dat);
}
}
/*********************OLED复位************************************/
void OLED_CLS(void)
{
unsigned char y,x;
for(y=0;y<8;y++)
{
OLED_WrCmd(0xb0+y);
OLED_WrCmd(0x01);
OLED_WrCmd(0x10);
for(x=0;x<X_WIDTH;x++)
OLED_WrDat(0);
}
}
//--------------------------------------------------------------
// Prototype : void OLED_OFF(void)
// Calls :
// Parameters : none
// Description : 让OLED休眠 -- 休眠模式下,OLED功耗不到10uA
//--------------------------------------------------------------
void OLED_OFF(void)
{
OLED_WrCmd(0X8D); //设置电荷泵
OLED_WrCmd(0X10); //关闭电荷泵
OLED_WrCmd(0XAE); //OLED休眠
}
//--------------------------------------------------------------
// Prototype : void OLED_ON(void)
// Calls :
// Parameters : none
// Description : 将OLED从休眠中唤醒
//--------------------------------------------------------------
void OLED_ON(void)
{
OLED_WrCmd(0X8D); //设置电荷泵
OLED_WrCmd(0X14); //开启电荷泵
OLED_WrCmd(0XAF); //OLED唤醒
}
/*********************OLED初始化************************************/
void OLED_IIC_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); //使能PB端口时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable , ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4; //端口配置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //50M
GPIO_Init(GPIOB, &GPIO_InitStructure);
delay_ms(500);//
OLED_WrCmd(0xae);//--turn off oled panel
OLED_WrCmd(0x00);//---set low column address
OLED_WrCmd(0x10);//---set high column address
OLED_WrCmd(0x40);//--set start line address Set Mapping RAM Display Start Line (0x00~0x3F)
OLED_WrCmd(0x81);//--set contrast control register
OLED_WrCmd(0xFF); // Set SEG Output Current Brightness 亮度调节 0x00~0xff
OLED_WrCmd(0xa1);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
OLED_WrCmd(0xc8);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常
OLED_WrCmd(0xa6);//--set normal display
OLED_WrCmd(0xa8);//--set multiplex ratio(1 to 64)
OLED_WrCmd(0x3f);//--1/64 duty
OLED_WrCmd(0xd3);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
OLED_WrCmd(0x00);//-not offset
OLED_WrCmd(0xd5);//--set display clock divide ratio/oscillator frequency
OLED_WrCmd(0x80);//--set divide ratio, Set Clock as 100 Frames/Sec
OLED_WrCmd(0xd9);//--set pre-charge period
OLED_WrCmd(0xf1);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
OLED_WrCmd(0xda);//--set com pins hardware configuration
OLED_WrCmd(0x12);
OLED_WrCmd(0xdb);//--set vcomh
OLED_WrCmd(0x40);//Set VCOM Deselect Level
OLED_WrCmd(0x20);//-Set Page Addressing Mode (0x00/0x01/0x02)
OLED_WrCmd(0x02);//
OLED_WrCmd(0x8d);//--set Charge Pump enable/disable
OLED_WrCmd(0x14);//--set(0x10) disable
OLED_WrCmd(0xa4);// Disable Entire Display On (0xa4/0xa5)
OLED_WrCmd(0xa6);// Disable Inverse Display On (0xa6/a7)
OLED_WrCmd(0xaf);//--turn on oled panel
OLED_Fill(0x00); //初始清屏
OLED_Set_Pos(0,0);
}
//在指定位置显示一个字符,包括部分字符
//x:0~127
//y:0~63
//mode:0,反白显示;1,正常显示
//size:选择字体 16/12
void OLED_ShowChar(u8 x,u8 y,u8 chr)
{
unsigned char c=0,i=0;
c=chr-' ';//得到偏移后的值
if(x>Max_Column-1)
{
x=0;y=y+2;
}
OLED_Set_Pos(x,y+1);
for(i=0;i<6;i++)
OLED_WrDat(F6x8[c][i]);
}
/***************功能描述：显示6*8一组标准ASCII字符串显示的坐标（x,y），y为页范围0～7****************/
void OLED_P6x8Str(unsigned char x,unsigned char y,unsigned char ch[])
{
unsigned char c=0,i=0,j=0;
while (ch[j]!='\0')
{
c =ch[j]-32;
if(x>126){x=0;y++;}
OLED_Set_Pos(x,y);
for(i=0;i<6;i++)
OLED_WrDat(F6x8[c][i]);
x+=6;
j++;
}
}
/*******************功能描述：显示8*16一组标准ASCII字符串显示的坐标（x,y），y为页范围0～7****************/
void OLED_P8x16Str(unsigned char x,unsigned char y,unsigned char ch[])
{
unsigned char c=0,i=0,j=0;
while (ch[j]!='\0')
{
c =ch[j]-32;
if(x>120){x=0;y++;}
OLED_Set_Pos(x,y);
for(i=0;i<8;i++)
OLED_WrDat(F8X16[c*16+i]);
OLED_Set_Pos(x,y+1);
for(i=0;i<8;i++)
OLED_WrDat(F8X16[c*16+i+8]);
x+=8;
j++;
}
}

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