스마트 컨트롤러

20150727

2015 스마트 콘트롤러/업무일지 2015. 7. 27. 23:24

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ARM

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<ARM>

=LCD DISPLAY

<LCD.H>

#ifndef __LCD_H__
#define __LCD_H__
#include <AT91SAM7S256.h>

#define LCD_BUS  0x00FF0000  //MASK 16~23
#define LCD_RS  0x00000001  // 1
#define LCD_RW  0x00000002  // 2
#define LCD_EN  0x00000004  // 3

#define  LCD_INST_CLR  0x01
#define  LCD_INST_HOME  0x02
#define  LCD_INST_ENT  0x06  // I/D = 1 , S = 0 (INCREMENT/DEDREMENT , SHIFT)
#define  LCD_INST_DSP  0x0F  // D = 1 , C = 1 , B = 1 (DISPLAY ON , CURSOR ON , CURSOR BLINK)
#define  LCD_INST_CUR  0x14  // S/C = 0  , R/L = 1 ( DISPLAY SHIF/CURSOR MOVE , RIGHT/LEFT)
#define  LCD_INST_FUNC   0x38  // DL =1 , N =1 , F = 0 ( DATA LENGTH8/4 , LINE2/1 , FONT5x10/5x7)

#define LCD_CAL_INST(X)  ((LCD_BUS)&((X)<<16)) // INST만 넣기

void LCD_Data(unsigned char );
void LCD_Print(const unsigned char * );
void LCD_Init(void);
#endif // __LCD_H__

<LCD.C>

#include "lcd.h"

void LCD_Inst(unsigned int uiInst)
{
  volatile unsigned int uiCnt;

  *AT91C_PIOA_CODR = LCD_BUS | LCD_RS | LCD_RW | LCD_EN;  // LOW
  *AT91C_PIOA_SODR = LCD_CAL_INST(uiInst);
  for(uiCnt = 0 ; uiCnt <4600; ++uiCnt);  // ALL INIT
  for(uiCnt = 0 ; uiCnt <4500; ++uiCnt);  // RS = LOW
  *AT91C_PIOA_SODR = LCD_EN;
  for(uiCnt = 0 ; uiCnt <4600; ++uiCnt);  // EN = HIGH
  for(uiCnt = 0 ; uiCnt <4500; ++uiCnt);  // BUS = DATA
  for(uiCnt = 0 ; uiCnt <4500; ++uiCnt);  // BUS = VALID DATA
  *AT91C_PIOA_CODR = LCD_EN;
  for(uiCnt = 0 ; uiCnt <4500; ++uiCnt);  // EN = LOW

  return;
}

void LCD_Data(unsigned char ucData)
{
  volatile unsigned int uiCnt;

  *AT91C_PIOA_CODR = LCD_BUS | LCD_RS | LCD_RW | LCD_EN;  // LOW
  *AT91C_PIOA_SODR = LCD_CAL_INST(ucData);
  for(uiCnt = 0 ; uiCnt <14; ++uiCnt);  // ALL INIT
  *AT91C_PIOA_SODR = LCD_RS;
  for(uiCnt = 0 ; uiCnt <13; ++uiCnt);  // RS = HIGH
  *AT91C_PIOA_SODR = LCD_EN;
  for(uiCnt = 0 ; uiCnt <15; ++uiCnt);  // EN = HIGH
  for(uiCnt = 0 ; uiCnt <13; ++uiCnt);  // BUS = DATA
  for(uiCnt = 0 ; uiCnt <13; ++uiCnt);  // BUS = VALID DATA
  *AT91C_PIOA_CODR = LCD_EN;
  for(uiCnt = 0 ; uiCnt <13; ++uiCnt);  // EN = LOW

  return;
}

void LCD_Print(const unsigned char * ucString)
{
  while(0 !=  *ucString)
  {
    LCD_Data(*ucString);
    ++ucString;
  }

  return;
}

void LCD_Init(void)
{
  volatile unsigned int uiCnt;

  //*PIO_PER = LCD_BUS | LCD_RS | LCD_RW | LCD_EN; // 0번지 X => ASSEM
  //AT91C_BASE_PIOA->PIO_PER = LCD_BUS | LCD_RS | LCD_RW | LCD_EN;
  *AT91C_PIOA_PER = LCD_BUS | LCD_RS | LCD_RW | LCD_EN;
  *AT91C_PIOA_OER = LCD_BUS | LCD_RS | LCD_RW | LCD_EN;
  *AT91C_PIOA_PPUDR = LCD_BUS | LCD_RS | LCD_RW | LCD_EN;

  for(uiCnt = 0 ; uiCnt <50; ++uiCnt);

  LCD_Inst(LCD_INST_FUNC);
  LCD_Inst(LCD_INST_DSP);
  LCD_Inst(LCD_INST_ENT);
  LCD_Inst(LCD_INST_CUR);
  LCD_Inst(LCD_INST_CLR);
  LCD_Inst(LCD_INST_HOME);

  return;
}