2020年12月06日 | STM32 —— 中景园0.96寸OLED

    OLED，即有机发光二极管（  Organic Light Emitting Diode ）。 OLED 由于同时具备自发光，不需背光源、对比度高、厚度薄、视角广、反应速度快、可用于挠曲性面板、使用温度范围广、构造及制程较简单等优异之特性，被认为是下一代的平面显示器新兴应用技术。

    LCD 都需要背光，而 OLED 不需要，因为它是自发光的。这样同样的显示 OLED 效果要来得好一些。以目前的技术，OLED 的尺寸还难以大型化，但是分辨率确可以做到很高。

    分辨率：128*64

    驱动方式：SPI/IIC，以下程序是IO口模拟IIC通信。

#ifndef __OLED_H

#define __OLED_H

typedef   signed           char int8_t;

typedef   signed short     int int16_t;

typedef   signed           int int32_t;

typedef   signed       __int64 int64_t;

/* exact-width unsigned integer types */

typedef unsigned           char uint8_t;

typedef unsigned short     int uint16_t;

typedef unsigned           int uint32_t;

typedef unsigned           int size_t;

typedef unsigned       __int64 uint64_t;

#define OLED_SCL_PORT        GPIOA

#define OLED_SCL_PIN         GPIO_Pin_5

#define OLED_SCL_CONFIG()    GPIOConfig(OLED_SCL_PORT, OLED_SCL_PIN, GPIO_Mode_Out_PP)

#define OLED_SCL_LOW()       GPIO_ResetBits(OLED_SCL_PORT, OLED_SCL_PIN) // SCL

#define OLED_SCL_HIGH()      GPIO_SetBits(OLED_SCL_PORT, OLED_SCL_PIN)

#define OLED_SDA_PORT        GPIOA

#define OLED_SDA_PIN         GPIO_Pin_7

#define OLED_SDA_CONFIG()    GPIOConfig(OLED_SDA_PORT, OLED_SDA_PIN, GPIO_Mode_Out_PP)

#define OLED_SDA_LOW()       GPIO_ResetBits(OLED_SDA_PORT, OLED_SDA_PIN) // SDA

#define OLED_SDA_HIGH()      GPIO_SetBits(OLED_SDA_PORT, OLED_SDA_PIN)

#define OLED_RES_PORT        GPIOA

#define OLED_RES_PIN         GPIO_Pin_6

#define OLED_RES_CONFIG()    GPIOConfig(OLED_RES_PORT, OLED_RES_PIN, GPIO_Mode_Out_PP)

#define OLED_RES_LOW()       GPIO_ResetBits(OLED_RES_PORT, OLED_RES_PIN) // RES

#define OLED_RES_HIGH()      GPIO_SetBits(OLED_RES_PORT, OLED_RES_PIN)

#define OLED_MODE 0

#define SIZE 8

#define XLevelL 0x00

#define XLevelH 0x10

#define Max_Column 128

#define Max_Row 64

#define Brightness 0xFF 

#define X_WIDTH 128

#define Y_WIDTH 64       

#define OLED_CMD  0 //写命令

#define OLED_DATA 1 //写数据

void IICStart(void);

void IICStop(void);

void I2CWriteCmd(uint8_t cmd);

void I2CWriteData(uint8_t data);

void I2CWriteByte(uint8_t byte);

void I2CWaitAck(void);

//OLED控制用函数

void OLEDWriteByte(uint8_t dat,uint8_t cmd);  

void OLEDDisplayOn(void);

void OLEDDisplayOff(void);             

void OLEDInit(void);

void OLEDClear(void);

void OLEDDrawPoint(uint8_t x,uint8_t y,uint8_t t);

void OLEDFill(uint8_t x1,uint8_t y1,uint8_t x2,uint8_t y2,uint8_t dot);

void OLEDShowChar(uint8_t x,uint8_t y,uint8_t chr,uint8_t Char_Size);

void OLEDShowNum(uint8_t x,uint8_t y,uint32_t num,uint8_t len,uint8_t size);

void OLEDShowString(uint8_t x,uint8_t y, uint8_t *p,uint8_t Char_Size);  

void OLEDSetPos(uint8_t x, uint8_t y);

void OLEDShowCHinese(uint8_t x,uint8_t y,uint8_t no);

void OLEDDrawBMP(uint8_t x0, uint8_t y0,uint8_t x1,uint8_t y1,uint8_t BMP[]);

#endif  

#include "oled.h"

#include "stdlib.h"

#include "oledfont.h"

void IICStart(void)

{

  OLED_SCL_HIGH() ;

  OLED_SDA_HIGH();

  OLED_SDA_LOW();

  OLED_SCL_LOW();

}

void IICStop(void)

{

  OLED_SCL_HIGH() ;

  OLED_SDA_LOW();

  OLED_SDA_HIGH();

}

void I2CWaitAck(void)

{

  OLED_SCL_HIGH() ;

  OLED_SCL_LOW();

}

void I2CWriteByte(uint8_t byte)

{

  uint8_t i;

  uint8_t m, data;

  data = byte;

  OLED_SCL_LOW();

  for(i = 0; i < 8; i++)

  {

    m = data;

    m = m & 0x80;

    if(m == 0x80)

    {

      OLED_SDA_HIGH();

    }

    else

    {

      OLED_SDA_LOW();

    }

    data = data << 1;

    OLED_SCL_HIGH();

    OLED_SCL_LOW();

  }

}

void I2CWriteCmd(uint8_t cmd)

{

  IICStart();

  I2CWriteByte(0x78);      //Slave address,SA0=0

  I2CWaitAck();

  I2CWriteByte(0x00);      //write command

  I2CWaitAck();

  I2CWriteByte(cmd);

  I2CWaitAck();

  IICStop();

}

void I2CWriteData(uint8_t data)

{

  IICStart();

  I2CWriteByte(0x78);      //D/C#=0; R/W#=0

  I2CWaitAck();

  I2CWriteByte(0x40);      //write data

  I2CWaitAck();

  I2CWriteByte(data);

  I2CWaitAck();

  IICStop();

}

void OLEDWriteByte(uint8_t dat, uint8_t cmd)

{

  if(cmd)

  {

    I2CWriteData(dat);

  }

  else

  {

    I2CWriteCmd(dat);

  }

}

//坐标设置

void OLEDSetPos(uint8_t x, uint8_t y)

{

  OLEDWriteByte(0xb0 + y, OLED_CMD);

  OLEDWriteByte(((x & 0xf0) >> 4) | 0x10, OLED_CMD);

  OLEDWriteByte((x & 0x0f), OLED_CMD);

}

//开启OLED显示

void OLEDDisplayOn(void)

{

  OLEDWriteByte(0X8D, OLED_CMD); //SET DCDC命令

  OLEDWriteByte(0X14, OLED_CMD); //DCDC ON

  OLEDWriteByte(0XAF, OLED_CMD); //DISPLAY ON

}

//关闭OLED显示

void OLEDDisplayOff(void)

{

  OLEDWriteByte(0X8D, OLED_CMD); //SET DCDC命令

  OLEDWriteByte(0X10, OLED_CMD); //DCDC OFF

  OLEDWriteByte(0XAE, OLED_CMD); //DISPLAY OFF

}

//清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样!!!

void OLEDClear(void)

{

  uint8_t i, n;

  for(i = 0; i < 8; i++)

  {

    OLEDWriteByte (0xb0 + i, OLED_CMD); //设置页地址（0~7）

    OLEDWriteByte (0x00, OLED_CMD);     //设置显示位置—列低地址

    OLEDWriteByte (0x10, OLED_CMD);     //设置显示位置—列高地址

    for(n = 0; n < 128; n++)

    {

      OLEDWriteByte(0, OLED_DATA);

    }

  } //更新显示

}

void OLED_On(void)

{

  uint8_t i, n;

  for(i = 0; i < 8; i++)

  {

    OLEDWriteByte (0xb0 + i, OLED_CMD); //设置页地址（0~7）

    OLEDWriteByte (0x00, OLED_CMD);     //设置显示位置—列低地址

    OLEDWriteByte (0x10, OLED_CMD);     //设置显示位置—列高地址

    for(n = 0; n < 128; n++)

    {

      OLEDWriteByte(1, OLED_DATA);

    }

  } //更新显示

}

//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 OLEDShowChar(uint8_t x, uint8_t y, uint8_t chr, uint8_t Char_Size)

{

  uint8_t c = 0, i = 0;

  c = chr - ' '; //得到偏移后的值

  if(x > Max_Column - 1)

  {

    x = 0;

    y = y + 2;

  }

  if(Char_Size == 16)

  {

    OLEDSetPos(x, y);

    for(i = 0; i < 8; i++)

    {

      OLEDWriteByte(F8X16[c * 16 + i], OLED_DATA);

    }

    OLEDSetPos(x, y + 1);

    for(i = 0; i < 8; i++)

    {

      OLEDWriteByte(F8X16[c * 16 + i + 8], OLED_DATA);

    }

  }

  else

  {

    OLEDSetPos(x, y);

    for(i = 0; i < 6; i++)

    {

      OLEDWriteByte(F6x8[c][i], OLED_DATA);

    }

  }

}

//m^n函数

uint32_t oled_pow(uint8_t m, uint8_t n)

{

  uint32_t result = 1;

  while(n--)

  {

    result *= m;

  }

  return result;

}

//显示2个数字

//x,y :起点坐标

//len :数字的位数

//size:字体大小

//mode:模式 0,填充模式;1,叠加模式

//num:数值(0~4294967295);

void OLEDShowNum(uint8_t x, uint8_t y, uint32_t num, uint8_t len, uint8_t size2)

{

  uint8_t t, temp;

  uint8_t enshow = 0;

  for(t = 0; t < len; t++)

  {

    temp = (num / oled_pow(10, len - t - 1)) % 10;

    if(enshow == 0 && t < (len - 1))

    {

      if(temp == 0)

      {

        OLEDShowChar(x + (size2 / 2)*t, y, ' ', size2);

        continue;

      }

      else

      {

        enshow = 1;

      }

    }

    OLEDShowChar(x + (size2 / 2)*t, y, temp + '0', size2);

  }

}

//显示一个字符号串

void OLEDShowString(uint8_t x, uint8_t y, uint8_t *chr, uint8_t Char_Size)

{

  uint8_t j = 0;

  while (chr[j] != '')

  {

    OLEDShowChar(x, y, chr[j], Char_Size);

    x += 8;

    if(x > 120)

    {

      x = 0;

      y += 2;

    }

    j++;

  }

}

//显示汉字

void OLEDShowCHinese(uint8_t x, uint8_t y, uint8_t no)

{

  uint8_t t;

  OLEDSetPos(x, y);

  for(t = 0; t < 16; t++)

  {

    OLEDWriteByte(chinese[2 * no][t], OLED_DATA);

  }

  OLEDSetPos(x, y + 1);

  for(t = 0; t < 16; t++)

  {

    OLEDWriteByte(chinese[2 * no + 1][t], OLED_DATA);

  }

}

/***********功能描述：显示显示BMP图片128×64起始点坐标(x,y),x的范围0～127，y为页的范围0～7*****************/

void OLEDDrawBMP(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1, uint8_t BMP[])

{

  uint32_t j = 0;

  uint8_t x, y;

  if(y1 % 8 == 0)

  {

    y = y1 / 8;

  }

  else

  {

    y = y1 / 8 + 1;

  }

  for(y = y0; y < y1; y++)

  {

    OLEDSetPos(x0, y);

    for(x = x0; x < x1; x++)

    {

      OLEDWriteByte(BMP[j++], OLED_DATA);

    }

  }

}

static void oled_delay(uint32_t ms)

{

  while(--ms);

}

void OLEDInit(void)

{

  OLED_SCL_CONFIG();

  OLED_SDA_CONFIG();

  OLED_RES_CONFIG();

  OLED_SCL_HIGH();

  OLED_SDA_HIGH();

  OLED_RES_LOW();

  oled_delay(20000000);

  OLED_RES_HIGH();

  oled_delay(50000000);