main.c

aiji-s3c44b0在iar下的源码

/*
 * $Revision: 1.1 $
 */

// Example code for Aiji Systems MBA-44B0.
// A red filled rectangle is drawn at each point pressed on
// the touch screen.
// At start up the user must press twice on the touch screen at the
// points marked by a yellow rectangle to calibrate the touch screen.
//
// The procedure can be restarted by pressing the EINT0 button at the
// same time as touching the touch screen.
// 
// Code and data is located in the 512kb SRAM.
// The LCD fram buffer is located in the 32Mb SDRAM.
//

#include "s3c44b0x.h"
#include "main.h"
#include "touch.h"
#include "lcdlib.h"
#include "graphics.h"

#define MCLK (60000000)

void main(void)
{
  rNCACHBE0 = 0xC0004000; // SRAM and SDRAM is cachable.
  // Calibrate delay function. This must be done after cache setup.
  Delay(0);

  SetContrast(128);
  Lcd_Init();

  while(1)
  {
    Glib_ClearScr(0x0);
    TouchLCDExample();
  }
}


static int delayLoopCount=400;

void Delay(int time)
// time=0: adjust the Delay function by WatchDog timer.
// time>0: the number of loop time
// 100us resolution.
{
    int i,adjust=0;
    if(time==0)
    {
	time=200;
	adjust=1;
	delayLoopCount=400;
	rWTCON=((MCLK/1000000-1)<<8)|(2<<3);  // 1M/64,Watch-dog,nRESET,interrupt disable
	rWTDAT=0xffff;
	rWTCNT=0xffff;	 
	rWTCON=((MCLK/1000000-1)<<8)|(2<<3)|(1<<5); // 1M/64,Watch-dog enable,nRESET,interrupt disable 
    }
    for(;time>0;time--)
	for(i=0;i<delayLoopCount;i++);
    if(adjust==1)
    {
	rWTCON=((MCLK/1000000-1)<<8)|(2<<3);
	i=0xffff-rWTCNT;   //  1count/16us?????????
	delayLoopCount=8000000/(i*64);	//400*100/(i*64/200)   
    }
}