示波器设计程序07-12-6.c

自己编写的单片机程序

//ICC-AVR application builder : 2007-5-3 4:45:38
// Target : M16
// Crystal: 8.0000Mhz
/*ps:
  连接方式:RST        PB0
           D/C        PB2
           SCE        PB1
           SDIN       PB5
           CLK        PB7
*/
//示波器设计
//允许输入最大电压|2.4|v
//事例:输出一正弦波形,Vp_p=4.8v ,峰峰值满幅
#include <iom16v.h>
#include <macros.h>
//接口定义
#define  LCD_DC_PIN            0x04  //  PB2
#define  LCD_CE_PIN            0x02  //  PB1
#define  LCD_RST_PIN           0x01  //  PB0 
#define  SPI_MOSI_PIN          0x20  //  PB5  SPI-MOSI
#define  SPI_CLK_PIN           0x80  //  PB7  SPI-SCK 
#define  uchar  unsigned char
#define  uint   unsigned int

#define  X_Length  84     //X轴数据长度
uchar    X_Init;
uchar    Y_Init;
uchar    X_data=0;
uchar    Y_data=2; 
uchar    temp;          //有符号数
uchar    result;
uchar    count;
uchar    temp1;
uchar    temp2;         //采样值高低位暂存
uint     getdata;       //采样值
/*-------------------------------------------------------------------------
-------------------- X轴描点坐标------------------------------------------*/
uchar const X_TAB[]  =               
{0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _  1
 0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _  2
 0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _  3
 0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _  4
 0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _  5
 0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _  6 
 0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _  7
 0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _  8
 0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _  9 
 0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _ 10  
 0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _ 11 
 0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _ 12 
 0x80, 0x80, 0x80, 0x80, 0x80,0x00,   // _ 13 */
 0x80, 0x80, 0x80, 0x80, 0x80,0x00  };// _ 14
/*--------------Y轴描点坐标--------------------*/
uchar const Y_TAB[]={0x00, 0x00, 0x7F, 0x00, 0x00}; // |  
/*--------------Z轴描点坐标--------------------*/
uchar const Z_TAB[]  ={0x80, 0x40, 0x20, 0x10, 0x08,0x04, 0x02, 0x01};//由下到上
//uchar const K_TAB[]  ={0x01, 0x02, 0x04, 0x08, 0x10,0x20, 0x40, 0x80};//从上到下                
/*------------------------------
Public function prototypes
-------------------------------*/
void LcdInit     ( void );  //初始化
void LcdClear    ( void );  //LCD清屏

static void LcdSend   ( uchar, uchar); //LCD数据发送
static void Delay     ( void );         //延时
void LcdGotoXY        (uchar, uchar );  //坐标

/*-----------------------------------------------------------------
  Name      :  LcdInit    LCD初始化
  Description  :  Performs MCU SPI & LCD controller initialization.
-------------------------------*/
void LcdInit( void )
{   
  PORTB |= LCD_RST_PIN;     //复位引脚为高电平
  DDRB |= LCD_RST_PIN | LCD_DC_PIN | LCD_CE_PIN | SPI_MOSI_PIN |SPI_CLK_PIN;
   Delay();  //short delay  
   PORTB &= ~LCD_RST_PIN; //上电复位；//复位引脚为低电平
   Delay();
   PORTB |= LCD_RST_PIN;  //复位完；  //
   SPCR = BIT(SPE)|BIT(MSTR); //使能SPI,主机模式；
   PORTB |= LCD_CE_PIN; //CE引脚为高电平
   LcdSend( 0x21, 0 );  // LCD Extended Commands.
   LcdSend( 0xC8, 0 );  // Set LCD Vop (Contrast).
   LcdSend( 0x06, 0 );  // Set Temp coefficent. 
   LcdSend( 0x13, 0 );  // LCD bias mode 1:48.  
   LcdSend( 0x20, 0 );  // LCD Standard Commands, Horizontal addressing mode.
   LcdSend( 0x0C, 0 );  // LCD in normal mode.
   LcdClear();
  
}
/*-------------------------------------------------------------------------
  Name      :  LcdClear
  Description  :  Clears the display.
--------------------------------------------------------------------------*/
void LcdClear(void)
{
unsigned int i;
LcdSend(0x0c, 0); 
LcdSend(0x80, 0); //此时默认操作为清屏
for (i=0; i<504; i++)
LcdSend(0, 1); 
}
/*-----------------------------------------------------------------
  Name      :  LcdGotoXY 设置块坐标
  Description  :  Sets cursor location to xy location corresponding to basic font size.
-------------------------------*/
void LcdGotoXY(uchar X, uchar Y)  //坐标轴的设置
{
LcdSend(0x40 | Y, 0); // column  列 64+y
LcdSend(0x80 | X, 0); // row     行 128+x
}
/*-----------------------------------------------------------------
  Name      :  LcdSend
  Description  :  Sends data to display controller.
  Argument(s)  :  data -> Data to be sent
            cd  -> Command or data (see/use enum)
-------------------------------*/
static void LcdSend (uchar data, uchar command)
{
PORTB &= ~LCD_CE_PIN ; // 使能LCD
if (command == 0)
PORTB &= ~LCD_DC_PIN ; // 传送命令
else
PORTB |= LCD_DC_PIN ;  // 传送数据
SPDR = data;           // 传送数据到SPI寄存器
while ((SPSR & 0x80) == 0); // 等待数据传送完毕
PORTB |= LCD_CE_PIN ;       // 关闭LCD
}
/*---------------------------------------------------------------
  Name      :  Delay
  Description  :  Uncalibrated delay for LCD init routine.
-----------------------------------------------------------------*/
static void Delay ( void )
{
   uchar i;
   for ( i = 0; i < 100; i++ );
}
/*---------------------------------------------------------------
  Name      :  AD转换子程序
  Description  : 采用查询方式
-----------------------------------------------------------------*/
void  ad_convert(void)
{ 
 ADCSRA=0X86;        //采用单次转换模式,ad使能，64分频
 ADMUX=0Xc2;         //选择通道2,选择内部参考电压,结果右对齐
 ADCSR|=BIT(ADSC);   //置一,启动转换
 while((ADCSRA & 0x10)==0);  //等待转换结束
 ADCSRA|=0x10;               //转换结束
 ADCSRA&= ~(1 << ADEN);      /*关闭转换*/
 temp1=ADCL;
 temp2=ADCH;
 getdata=256*temp2+temp1;    //10位采样值
 /*运算*/
 getdata=getdata>>2;         //将采样的数据转换成电压
 if(getdata >127)            //转换成实际的坐标值0~47
 getdata=(23+((getdata-128)*10)/53); 
 else if(getdata <=127)
 getdata=(23-((128-getdata)*10)/53);
 result=getdata;
 } 
/*-----------------------------------------------------------------
  Name      :  coordinate     
  Description  : 坐标定位子程序 
------------------------------------------------------------------*/
void coordinate_init(void)  
{  uchar X;  //v=0,按行显示，x对应某个bank(0~83)
   /*----------------------*/ 
   /*----x轴显示-----------*/
   X_Init=0;Y_Init=2;        //x横向坐标 
   //for(X_Init=0;X_Init<14;X_Init++) //显示纵坐标
    LcdGotoXY(X_Init,Y_Init); //0，2
    for(X=0;X<X_Length;X++)   //如果小于84，就一直输出数据 
	{   
    LcdSend(X_TAB[X],1);      //取字模，显示横坐标    
    }
    /*----x轴显示完毕-------*/
    /*----------------------*/ 
	/*----y轴显示-----------*/
   X_Init=42;Y_Init=0;                //y纵向坐标
   for(Y_Init=0;Y_Init<6;Y_Init++)    //显示纵坐标
   {
    LcdGotoXY(X_Init,Y_Init); //42，0
    for(X=0;X<5;X++)          //如果小于5，就一直输出数据
    LcdSend(Y_TAB[X],1);      //取字模
   }
   /*----y轴显示完毕---------*/
   /*----------------------*/    
 }
/*-----------------------------------------------------------------
  Name      :  //T/C中断
  TIMER1 initialize - prescale:1024
  WGM: 0) Normal, TOP=0xFFFF
  desired value: 1Sec
  actual value:  1.000Sec (0.0%)
------------------------------------------------------------------*/
void timer1_init(void)
{
 TCCR1B = 0x00; //stop     无时钟源  T/C停止
 TCNT1H = 0xf0; //setup    数据寄存器
 TCNT1L = 0xbe; 
 TCCR1A = 0x00; //T/C控制寄存器   使用普通端口
 TCCR1B = 0x04; //start Timer  //1M经过256分频=3906Hz
//分频由后三位控制    010/ 8    011/64  100/256  101/1024               
}
/*-----------------------------------------------------------------
  Name      :call this routine to initialize all peripherals
------------------------------------------------------------------*/
void init_devices(void)
{        
 CLI();  //disable all interrupts
 timer1_init();
 MCUCR = 0x00;
 GICR  = 0x00;
 TIMSK = 0x1C; //timer interrupt sources /*定时器使用中断规则设定*/
//输出比较器A，B中断控制，一旦TIFR上的OCF1A置位 ，cpu开始执行a的
//中断程序。T/C溢出中断使能。
 SEI();        //中断使能
}
/*-----------------------------------------------------------------
  Name  :wave_disp  任意波形显示  
  FUNCTION：还原波形，显示电气参数
------------------------------------------------------------------*/
void  wave_disp (void)
{ 
  if(result<8&&result>=0)  
  Y_data=5;
  if(result<16&&result>=8)
  Y_data=4;
  if(result<24&&result>=16)
  Y_data=3;
  if(result<32&&result>=24)
  Y_data=2;
  if(result<40&&result>=32)
  Y_data=1;
  if(result<48&&result>=40)
  Y_data=0;
  LcdGotoXY(X_data,Y_data); //
  LcdSend(Z_TAB[result%8],1);      //取字模
  X_data++;
  if(X_data>83)
  {
  X_data=0;
  LcdInit();//LCD初始化
  coordinate_init();
  }
}
/*-----------------------------------------------------------------
  Name      :  //T/C中断
------------------------------------------------------------------*/
#pragma interrupt_handler timer1_ovf_isr:9
void timer1_ovf_isr(void) //将每秒执行一次
{
 TCNT1H = 0xf0; //reload counter high value 65536-57724=7812
 TCNT1L = 0xbe; //reload counter low value  57724  
 ad_convert();  //调用AD程序
 /*result++;      //将其转换成0~47之间的数值
 if(result>47)
 result=0;*/
 wave_disp();   //正弦波数据读取
}
/*-----------------------------------------------------------------
  Name      :  main
------------------------------------------------------------------*/
void main(void)
{  
  LcdInit();//LCD初始化  
  init_devices();
  coordinate_init();
  while(1);   //循环
}