无线传感网络实训|实验3.1 IIC控制OLED实验

发布者：唯众    布时间：2020-11-27 15:36:33    点击量：

1．实验目的

1）、通过实验掌握CC2530芯片GPIO模拟IIC的方法
2）、掌握模拟IIC驱动OLED的能力

2．实验设备

硬件：PC机1台、ZIGBEE节点板1套（底板、核心板、仿真器、USB 线）
软件：2000/XP/win7 系统，IAR 8.10 集成开发环境

3．实验相关电路图

4．实验相关寄存器

5．源码分析

#include <ioCC2530.H> #include <string.h> #include <stdio.h>   #include "ASCII_CODE_8X16_5X8_VERTICAL.H" #include "Chinese_And_Graphic.H"   //====================================================== #define lcd_scl  P0_4           //接口定义:lcd_sclk就是LCD的SCL   #define lcd_sda  P0_5         //接口定义:lcd_sda就是LCD的SDA      #define BV(x)     (1<<x) #define uchar unsigned char #define uint unsigned int #define ulong unsigned long   //延时函数 void Delay_us() //1 us延时 {     asm("nop");     asm("nop");     asm("nop");     asm("nop");     asm("nop");        asm("nop");     asm("nop");     asm("nop");         asm("nop"); }   void Delay3us()   {        Delay_us();        Delay_us();        Delay_us(); }   void Delay_1ms(void)       //1 ms延时 {        unsigned int i;        for(i=0;i<1000;i++)               Delay_us(); }   void Delay_ms(uint ms) {        for(uint i=0;i<ms;i++)               Delay_1ms(); }             void  start() {        lcd_scl = 1;        lcd_sda = 1;        lcd_sda=0;        lcd_scl=0; }   void  stop() {        lcd_scl=0;        lcd_sda=0;        lcd_sda=1;        lcd_scl=1; }   //传8位指令或数据到OLED显示模块 void transfer(uchar data1) {        unsigned char j;        for(j=0;j<8;j++)        {               lcd_scl=0;                    if(data1&0x80)    lcd_sda=1;                else             lcd_sda=0;                data1<<=1;               lcd_scl=1;     }     lcd_scl=0;     Delay3us();  //   ACK时间     lcd_scl=1; }   //写指令到OLED显示模块 void transfer_command(uchar com)   {        start();        transfer(0x78);        transfer(0x00);        transfer(com);        stop(); }   //写数据到OLED显示模块 void transfer_data(uchar dat) {        start();        transfer(0x78);        transfer(0x40);        transfer(dat);        stop(); }     //OLED显示模块初始化 void initial_lcd() {             Delay_ms(200);               transfer_command(0xae);       //关显示               transfer_command(0xd5);       //晶振频率        transfer_command(0x80);               transfer_command(0xa8);       //duty设置        transfer_command(0x1f); //duty=1/32               transfer_command(0xd3);       //显示偏移        transfer_command(0x00);                     transfer_command(0xa1);       //段重定向设置        transfer_command(0xa6);        transfer_command(0x40);       //起始行        transfer_command(0xb0);        transfer_command(0xd5);              transfer_command(0xf0);                      transfer_command(0x8d);       //升压允许        transfer_command(0x14);                     transfer_command(0x20);       //page address mode        transfer_command(0x02);               transfer_command(0xc8); //行扫描顺序：从上到下        transfer_command(0xa1); //列扫描顺序：从左到右               transfer_command(0xda); //sequential configuration        transfer_command(0x02);       //****************               transfer_command(0x81); //微调对比度,本指令的0x81不要改动，改下面的值        transfer_command(0xcf); //微调对比度的值，可设置范围0x00～0xff                      transfer_command(0xd9); //Set Pre-Charge Period        transfer_command(0xf1);               transfer_command(0xdb); //Set VCOMH Deselect Level        transfer_command(0x49);               transfer_command(0xaf); //开显示 }   void lcd_address(uchar page,uchar column) {        column=column-1;                                             //我们平常所说的第1列，在LCD驱动IC里是第0列。所以在这里减去1.        page=page-1;        transfer_command(0xb0+page);                          //设置页地址。每页是8行。一个画面的64行被分成8个页。我们平常所说的第1页，在LCD驱动IC里是第0页，所以在这里减去1        transfer_command(((column>>4)&0x0f)+0x10);       //设置列地址的高4位        transfer_command(column&0x0f);                            //设置列地址的低4位 }   //全屏清屏 void clear_screen() {        unsigned char i,j;       for(j=0;j<8;j++)        {               lcd_address(1+j,1);               for(i=0;i<128;i++)               {                      transfer_data(0x00);               }        } }   //full display test void full_display(uchar data1,uchar data2) {        int i,j;        for(i=0;i<8;i++)        {               lcd_address(i+1,1);               for(j=0;j<64;j++)               {                      transfer_data(data1);                      transfer_data(data2);                                            }        }          }   //显示128x32点阵的图片 void display_128x32(uchar page,uchar column,uchar *dp) {        uint i,j;        for(j=0;j<4;j++)        {               lcd_address(page+j,column);               for (i=0;i<128;i++)               {                           transfer_data(*dp);                                //写数据到LCD,每写完一个8位的数据后列地址自动加1                      dp++;               }        } }   //显示单个32x32点阵图像、汉字、生僻字或32x32点阵的其他图标 void display_graphic_32x32(uchar page,uchar column,uchar *dp) {        uchar i,j;        for(j=0;j<4;j++)        {               lcd_address(page+j,column);               for (i=0;i<32;i++)               {                           transfer_data(*dp);           //写数据到LCD,每写完一个8位的数据后列地址自动加1                      dp++;               }        } }   //显示单个16x16点阵图像、汉字、生僻字或16x16点阵的其他图标 void display_graphic_16x16(uchar page,uchar column,uchar *dp) {        uchar i,j;        for(j=0;j<2;j++)        {               lcd_address(page-1,column);               for (i=0;i<16;i++)               {                           transfer_data(*dp);           //写数据到LCD,每写完一个8位的数据后列地址自动加1                      dp++;               }        } }   //显示单个8x16点阵图像、ASCII, 或8x16点阵的自造字符、其他图标 void display_graphic_8x16(uchar page,uchar column,uchar *dp) {        uchar i,j;        for(j=0;j<2;j++)        {               lcd_address(page+j,column);               for (i=0;i<8;i++)               {                           transfer_data(*dp);                                //写数据到LCD,每写完一个8位的数据后列地址自动加1                      dp++;               }        } }   //显示8x16的点阵的字符串，括号里的参数分别为（页,列，字符串指针） void display_string_8x16(uint page,uint column,uchar text[]) {        uint i=0,j,k,n;        if(column>123)        {               column=1;               page+=2;        }        while(text[i]>0x00)        {                    if((text[i]>=0x20)&&(text[i]<=0x7e))               {                      j=text[i]-0x20;                      for(n=0;n<2;n++)                      {                                                lcd_address(page+n,column);                             for(k=0;k<8;k++)                             {                                                                     transfer_data(ascii_table_8x16[j][k+8*n]);  //写数据到LCD,每写完1字节的数据后列地址自动加1                             }                      }                      i++;                      column+=8;               }               else                      i++;        } }       //显示5x8的点阵的字符串，括号里的参数分别为（页,列，字符串指针） void display_string_5x8(uint page,uint column,uchar reverse,uchar *text)// 5,1,0  不反显 {                                                                                                                             // 5,1,1  反显        uint i=0,j,k,disp_data;        while(text[i]>0x00)        {                    if((text[i]>=0x20)&&(text[i]<=0x7e))               {                      j=text[i]-0x20;                      lcd_address(page,column);                      for(k=0;k<5;k++)                      {                             if(reverse==1)                             {                                    disp_data=~ascii_table_5x8[j][k];                             }                             else                             {                                    disp_data=ascii_table_5x8[j][k];                             }                                                         transfer_data(disp_data); //写数据到LCD,每写完1字节的数据后列地址自动加1                      }                      if(reverse==1)      transfer_data(0xff);    //写入一列空白列，使得5x8的字符与字符之间有一列间隔，更美观                      else transfer_data(0x00);                //写入一列空白列，使得5x8的字符与字符之间有一列间隔，更美观                      i++;                      column+=6;                      if(column>123)                      {                             column=1;                             page++;                      }               }               else                      i++;        } }     //写入一组16x16点阵的汉字字符串（取模的点阵数据数组中需含有此字） //括号里的参数：(页，列，汉字字符串） void display_string_16x16(uchar page,uchar column,uchar *text) {     uchar i,j,k;     uint address;         j = 0;     while(text[j] != '\0')     {         i = 0;         address = 1;         while(Chinese_text_16x16[i] > 0x7e)    // >0x7f即说明不是ASCII码字符         {             if(Chinese_text_16x16[i] == text[j])             {                 if(Chinese_text_16x16[i + 1] == text[j + 1])                 {                     address = i * 16;                     break;                 }             }             i += 2;                    }                 if(column > 113)         {             column = 0;             page += 2;         }                 if(address != 1)// 显示汉字                           {                                  for(k=0;k<2;k++)                      {                             lcd_address(page+k,column);                    for(i = 0; i < 16; i++)                                  {                        transfer_data(Chinese_code_16x16[address]);                          address++;                    }                   }             j += 2;                }         else              //显示空白字符                    {                      for(k=0;k<2;k++)                      {                             lcd_address(page+k,column);                    for(i = 0; i < 16; i++)                                  {                        transfer_data(0x00);                      }                   }                         j++;         }                 column+=16;     } }     //显示16x16点阵的汉字或者ASCII码8x16点阵的字符混合字符串 //括号里的参数：(页，列，字符串） void disp_string_8x16_16x16(uchar page,uchar column,uchar *text) {     uchar temp[3];     uchar i = 0;            while(text[i] != '\0')     {         if(text[i] > 0x7e)         {             temp[0] = text[i];             temp[1] = text[i + 1];             temp[2] = '\0';          //汉字为两个字节             display_string_16x16(page,column,temp);  //显示汉字             column += 16;             i += 2;         }         else         {             temp[0] = text[i];                temp[1] = '\0';          //字母占一个字节             display_string_8x16(page, column, temp);  //显示字母             column += 8;             i++;         }     } } static void port_init( void ) {             P0SEL &= ~BV(5);                     //General-purpose I/O        P0DIR |= BV(5);                        //OutPut               P0SEL &= ~BV(4);                     //General-purpose I/O        P0DIR |= BV(4);                        //OutPut               lcd_sda = 1;        lcd_scl = 1; }   void clock_setup(void) {        CLKCONCMD &= ~0x40;                         //设置系统时钟源为32MHZ晶振     while(CLKCONSTA & 0x40);                    //等待晶振稳定     CLKCONCMD &= ~0x47;                         //设置系统主时钟频率为32MHZ }   void main(void) {        port_init();        initial_lcd();                                                                 //初始化                                  clock_setup();               while(1)        {         clear_screen();                                                          //清屏               disp_string_8x16_16x16(1,1,"武汉唯众智创科技");             //显示字符串，括号里的参数分别为（PAGE,列,字符串指针）               disp_string_8x16_16x16(3,1,"Coming on 123!!");     //显示16x16点阵汉字串或8x16点阵的字符串，括号里的参数分别为（页,列,字符串指针）               Delay_ms(1000);        } }

6．实验现象

       蓝色OLED第一行显示“武汉唯众智创科技”，第二行显示“Coming on 123!”。汉字和英文字符数字都是可以显示的，并且每秒刷新（闪烁）一下。补充说明一下，该OLED不带字库，显示所有的字符都需要使用取模软件提取。

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