ARM Character LCD 제어..

문자 처리.
문자열 처리.
하이퍼터미널로 받은값 처리.
CGRAM 사용으로 사용자 정의문자 처리.


SI로 컴파일..
전부 하나하나 함수이기때문에 갔따 쓰면된다.. 알아서 잘배끼라 ..!!





#include "project.h"
#include "AT91SAM7S256.h"

//#define _StringLCD
//#define _SerialLCD
#define _UserMode  

#define   PIN(num)    AT91C_PIO_PA##num

#define  MY_LOW  (*(AT91_REG *)AT91C_PIOA_CODR)
#define MY_HIGH  (*(AT91_REG *)AT91C_PIOA_SODR)

#define   MY_RS   PIN(8)
#define   MY_RW   PIN(11)
#define   MY_ENB   PIN(12)
#define   MY_DB(num)  PIN(num)

#define MAIN_OSC  18432000     // 크리스탈 속도
#define MAIN_CLK  ((MAIN_OSC*73/14)/2)          // 체배기를 거친 후 속도
#define DBGU_SPEED  115200     // 디버그 유닛 속도

void Reset_DBGU()
{
 // Reset and disable receiver
 AT91C_BASE_DBGU->DBGU_CR = AT91C_US_RSTRX | AT91C_US_RSTTX;

 // Disable interrupts
 AT91C_BASE_DBGU->DBGU_IDR = 0xFFFFFFFF;

 // Configure PIOs for DBGU
 AT91C_BASE_PIOA->PIO_ASR = AT91C_PA9_DRXD | AT91C_PA10_DTXD;
 AT91C_BASE_PIOA->PIO_BSR = 0;
 AT91C_BASE_PIOA->PIO_PDR = AT91C_PA9_DRXD | AT91C_PA10_DTXD;

 // === Configure serial link ===
 // Define the baud rate divisor register [BRGR = MAIN_CLK / (115200 * 16)]
 AT91C_BASE_DBGU->DBGU_BRGR = MAIN_CLK / (DBGU_SPEED * 16);
 // Define the USART mode
 AT91C_BASE_DBGU->DBGU_MR = AT91C_US_PAR_NONE | AT91C_US_CHMODE_NORMAL;

 // Disable the RX and TX PDC transfer requests
 AT91C_BASE_DBGU->DBGU_PTCR = AT91C_PDC_RXTDIS;
 AT91C_BASE_DBGU->DBGU_PTCR = AT91C_PDC_TXTDIS;

 // Enable transmitter
 AT91C_BASE_DBGU->DBGU_CR = AT91C_US_TXEN | AT91C_US_RXEN;
 
}

unsigned char DBGU_Recv_Char()
{
 while (0 == (AT91C_BASE_DBGU->DBGU_CSR & AT91C_US_RXRDY));

 return AT91C_BASE_DBGU->DBGU_RHR;
}

void init_LED()
{
  (*(AT91_REG *)AT91C_PIOA_PER) =  MY_DB(13)|MY_DB(29)|MY_DB(30);
  (*(AT91_REG *)AT91C_PIOA_OER) = MY_DB(13)|MY_DB(29)|MY_DB(30);
  MY_LOW = MY_DB(13)|MY_DB(30);
  MY_HIGH = MY_DB(29);
}

void CharLCDEnable()
{
 AT91C_BASE_PIOA->PIO_PER = PIN(0)|PIN(1)|PIN(2)|PIN(3)|PIN(4)|PIN(5)|PIN(6)|PIN(7)|PIN(8)|PIN(11)|PIN(12);
 
 AT91C_BASE_PIOA->PIO_OER = PIN(0)|PIN(1)|PIN(2)|PIN(3)|PIN(4)|PIN(5)|PIN(6)|PIN(7)|PIN(8)|PIN(11)|PIN(12);
 
}

void Delay()
{
 volatile unsigned int iCnt1;
 for(iCnt1 = 0; iCnt1 < 10000 ; ++iCnt1);
 
}

void CharAllLOW()
{
 MY_LOW = PIN(0)|PIN(1)|PIN(2)|PIN(3)|PIN(4)|PIN(5)|PIN(6)|PIN(7)|PIN(8)|PIN(11)|PIN(12);
}

void Start()
{
 CharAllLOW();
 MY_LOW  = MY_RW;
 Delay();
 MY_HIGH  = MY_ENB;   //4
 Delay();
 
}

void End()
{
 Delay();
 MY_LOW = MY_ENB;
 Delay();
 MY_HIGH = MY_ENB;
 
}

void ClearDisplay()
{
 Start();
 MY_HIGH = MY_DB(0);
 End();
}

void DisplayOnOff()
{
 Start();
 MY_HIGH = MY_DB(2)|MY_DB(3);
 End();
}

void CursorOrDisplayShift()
{
 Start();
 MY_HIGH =MY_DB(2)|MY_DB(3)|MY_DB(4);
 End();
}
void FunctionSet()
{
 Start();
 MY_HIGH = MY_DB(2)|MY_DB(3)|MY_DB(4)|MY_DB(5);
 End();
}

void EntryMode()
{
 Start();
 MY_HIGH = MY_DB(1)|MY_DB(2);
 End();
}

void SetLCD()
{
  FunctionSet();
  DisplayOnOff();
  CursorOrDisplayShift();
  EntryMode();
  ClearDisplay();
}

void WriteDataRam(volatile  unsigned char  cData)
{
 
  CharAllLOW();
  MY_HIGH = MY_RS;
  MY_HIGH  = MY_ENB;   //4
  Delay();

  MY_HIGH = cData;
  Delay();
  MY_LOW = MY_ENB;
  Delay();
  MY_HIGH =MY_RW;
  Delay();
}

void SetDDRamAddr(volatile unsigned int iData)
{
 Start();
 MY_HIGH = MY_DB(7)|iData;
 End();
}

void SetCGRamAddr(volatile unsigned int iData)
{
 Start();
 MY_HIGH = MY_DB(6)|iData;
 End();
}

void StringLCD(volatile unsigned char * cData)
{
 volatile unsigned int iCnt =0;
 
 while(*(cData + iCnt) != 0)
 {
  CharAllLOW();
  MY_HIGH  = MY_RS;
  MY_HIGH  = MY_ENB;   //4
  Delay();

  MY_HIGH = *(cData+iCnt);
  Delay();
  MY_LOW = MY_ENB;
  Delay();
  MY_HIGH =MY_RW;
  Delay();
  iCnt++;
 }
}

void SerialLCD()
{
 volatile unsigned char  DD;
 volatile unsigned int iCnt = 0;
 Reset_DBGU();
 
 while(1)
 {
 
  DD = DBGU_Recv_Char();
 
  if(iCnt == 17)
  {
   SetDDRamAddr(0x40);
  }
 
  if(iCnt == 33)
  {
   ClearDisplay();
   iCnt = 0;
  }
  WriteDataRam(DD);
  iCnt++;
 }
}

void UserMode()
{
 volatile  unsigned int iCnt;
 volatile  unsigned int font[] = {
  0x0E, 0x11, 0x11, 0x0E, 0x00, 0x00, 0x1F, 0x00,
  0x09, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x09,
  0x1E, 0x02, 0x02, 0x02, 0x1F, 0x04, 0x04, 0x04,
  0x00, 0x00, 0x00, 0x15, 0x0A, 0x00, 0x00, 0x00};

 SetCGRamAddr(0x40);
 for(iCnt=0; iCnt <32; iCnt++)
 {
  WriteDataRam(font[iCnt]);
 }

 SetDDRamAddr(0x86);  
 
 WriteDataRam(0x00);
 WriteDataRam(0x01);
 WriteDataRam(0x02);
 WriteDataRam(0x03);
 
}

int main()
{
 init_LED();    // LED SETTING
 CharLCDEnable();   // ALL LCD ENABLE
 CharAllLOW();   // ALL DB LOW SETTING
 
 SetLCD();    // LCD SETTING
 
#ifdef _StringLCD
 StringLCD("ABCDEFG");  // STRING LCD
#endif

#ifdef _SerialLCD
 SerialLCD();    // SERIAL LCD
#endif

#ifdef _UserMode
 UserMode();    // USERMODE(KOREAN)
#endif

 return 0;
}