test_main.c

基于44b0板的键盘开发程序,已经测试通过,接上去的是4*4的键盘

    rPDATC = ( rPDATC | 1<<4 );		//adj=1
    for(i=0;i<1;i++);
    rPDATC = ( rPDATC & (~(1<<4)) );	//adj=0
    for(i=0;i<2;i++);
}


#define M5D(n) ((n) & 0x1fffff)
#define LCD_XSIZE 	(256)
#define LCD_YSIZE 	(320)
#define HOZVAL		(LCD_XSIZE/4-1)
#define LINEVAL		(LCD_YSIZE-1)

void ClearVideoBuffer()
{
  U32 *p = (U32*)0x0c000000;
  while ((U32)p<0x0c00A800) *p++=0;
}

void Led_Display(int LedStatus)
{
	//PC1,PC2,PC3 High available
	rPDATC=(rPDATC & 0x1f1) | ((LedStatus & 0x7)<<1);
}

void Pixple(int x, int y)
{
    U32 *p =(U32*)0x0c000000 + ((320-x)*256+y-1)/32;
    if ((U32)p>0x0c00A800 || (U32)p<0x0c000000) return;
    if (y%32)
      *p |= (1<<(32-(y%32))); else
      *p |= 1;
}

void uPixple(int x, int y)
{
    U32 *p =(U32*)0x0c000000+ ((320-x)*256+y-1)/32;
    if ((U32)p>0x0c00A800 || (U32)p<0x0c000000) return;
    if (y%32)
      *p &= ~(1<<(32-(y%32))); else
      *p &= ~1;
}

void Intro()
{
    U32 *video = (U32*)0x0c000000;
    int j=0;
    while ((U32)video <0x0c00A800) *video ++=bmpIntro[j++];
}


void ClearIntro()
{
  int x,y;
  for (x=0;x<160;x++)
  {
    for (y=0;y<240;y++)
    {
	uPixple(160-x,y);
	uPixple(160+x,y);
    }
	Delay(50);
  }
   
}

void Uart_Init(int baud)
{
    rUFCON0=0x0;     //FIFO disable
    rUFCON1=0x0;
    rUMCON0=0x0;
    rUMCON1=0x0;
    rULCON0=0x3;     //Normal,No parity,1 stop,8 bit
    rUCON0=0x245;    //rx=edge,tx=level,disable timeout int.,enable rx error int.,normal,interrupt or polling
    rUBRDIV0=( (int)(MCLK/16./baud + 0.5) -1 );   
}

int Uart_Getch()
{
     while(!(rUTRSTAT0 & 0x1)); //Receive data read
	return RdURXH0();
}

void Uart_SendByte(int data)
{
	while(!(rUTRSTAT0 & 0x2)); //Wait until THR is empty.
	Delay(10);
	WrUTXH0(data);
}

void Uart_SendString(char *pt)
{
    while(*pt)
	Uart_SendByte(*pt++);
}

void Uart_Printf(char *fmt,...)
{
    va_list ap;
    char string[256];

    va_start(ap,fmt);
    vsprintf(string,fmt,ap);
    Uart_SendString(string);
    va_end(ap);
}


void WaitForSCK(unsigned char value)
{
  int i=0;
  while (((rPDATG>>6) & 0x01) != value && i++<3000);
}

int readbit()
{
   int i;
   WaitForSCK(0);
   i= (rPDATG>>5) & 0x01;
   WaitForSCK(1);
   return i;
}

int ReadKeyboard()
{
  int i, mb,p=0,v;
  rPCONG = 0xD7FF;// 01 01
  rPDATG |= 0x60;    
  rPCONG = 0xC3FF;  // 00 00
  mb = readbit();
  if (mb != 0) return;
  mb = 0;
  for (i=0;i<8;i++)
  {
    v = readbit();
     mb = mb | ( v << i);
    p = p + v;
  }
  v = readbit();
  p = p + v;
  if ((p&0x01)==0) 
  {
    rPCONG = 0xD7FF;// 01 01
    rPDATG |= 0x60;  
    return;
  }
  readbit(); 
  return mb;