test_main.c

这是一个非常典型的串口通信传送鼠标程序

  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 (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 (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);
  }
   
}

const U8 Mouse[35][2]= {
{0,0},{0,1},{0,2},{0,3},{0,4},{0,5},
{0,6},{0,7},{0,8},{0,9},{0,10},{1,1},
{1,10},{2,2},{2,9},{3,3},{3,8},{3,9},
{3,10},{3,11},{3,12},{3,13},{4,4},{4,14},
{5,5},{5,7},{5,8},{5,9},{5,10},{5,11},
{5,12},{5,13},{6,6},{6,7},{7,7}
};

int mPosX, mPosY;
int moPosX, moPosY;

void DrawMousePointer(int x,int y)
{
  int i;
  for (i=0;i<35;i++)
    uPixple(Mouse[i][0]+moPosX, Mouse[i][1]+moPosY);

  moPosX = x;
  moPosY = y;

  for (i=0;i<35;i++)
    Pixple(Mouse[i][0]+x, Mouse[i][1]+y);
}

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 ReadMouse()
{
  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;
}

void writebit(int b)
{

  WaitForSCK(0);