mouse.h

在基于avr内核的单片机上实现MP3播放器的功能

#define uart_debug_mouse  1
//==========================io fifo
#define io_fifo_size   16
//不得大于256个
uint8 io_fifo_buf[io_fifo_size];
uchar io_dat_cnt=0;//io fifo dat 数
unsigned char io_headp=0;
unsigned char io_lastp=0;
//==============================

void w_io_fifo(uchar dat)
{
if(io_dat_cnt<io_fifo_size)  {io_dat_cnt++;io_fifo_buf[io_lastp]=dat; 
                          if(io_lastp<(io_fifo_size-1)) io_lastp++;
                          else {io_lastp=0; }
                                  } //return ok;
//return error;
}


uchar   r_io_fifo(void)
{  uchar  i;
if(io_dat_cnt)         { i=io_fifo_buf[io_headp];
                      if(io_headp<(io_fifo_size-1)) io_headp++;
                      else {io_headp=0;}
                      io_dat_cnt--;return i; 
			             }
else  {return error; }
}
//==================================================

#define     int_2      B,2
#define     PS2dat     D,7 
#define     PS2clk    int_2     
//===================================


 
#define  Int2down_req     0
#define  Int2up_req       1
//===================================
void  use_interrupt2(unsigned char int_mode) {
SETBIT(GICR,INT2);MCUCSR&=(~(1<<6));(MCUCSR|=(int_mode<<6));in(int_2);
}


volatile uint8 ps_m_dat=0,PSDAT,ps_m_cnt=0;
//==============================
SIGNAL(SIG_INTERRUPT2)
{
if(ps_m_cnt<=10)
   {ps_m_dat>>=1;//接受数据 低->高
ps_m_cnt++;
if(r_bit(PS2dat)) {ps_m_dat|=0x80;if(ps_m_cnt==1) ps_m_cnt=0;}
else              {if(ps_m_cnt==11) ps_m_cnt=0;  }

if (ps_m_cnt==9) PSDAT=ps_m_dat;
if (ps_m_cnt==11) {w_io_fifo(PSDAT);ps_m_cnt=0; }//
   }
//if cnt >=12 that index a error clk on the wire 
}//

#define  WhileTout(condi,VTout,lim) VTout=0;while(condi) {_delay_us(20); if(VTout++>(lim/20)) break; }


uint8 Command2mouse(unsigned char dat)
{  uint8 i=0,datTP; 
uint16 Toutcnt=0;
datTP=dat;
out(PS2clk);out(PS2dat);
  clr(PS2clk);set(PS2dat);//sclk=0;  sda = 1;
_delay_us(40);
_delay_us(40);
_delay_us(40);
_delay_us(40);
  clr(PS2dat);//sda = 0;
_delay_us(30);
  slb(PS2clk);//sclk= 1; //release clk line  
  in(PS2clk);
  //====================data 
 WhileTout((r_bit(PS2clk)),Toutcnt,1000);
 if(Toutcnt>48)    { 
       in(PS2dat);in(PS2clk);return error;}
 
 for (i=0; i<8; i++)
    {
     if(dat&0x01)	slb(PS2dat); // sda=mouse_bit0;
	 else           clb(PS2dat);
 dat>>=1;//wm_dat>>=1;
 WhileTout((r_bit(PS2clk)==0),Toutcnt,1000);
 //while(sclk==0);
  WhileTout((r_bit(PS2clk)),Toutcnt,1000);
     } 
	 
	 uint8 j=0;
 for (i=0; i<8; i++)
	 {if(datTP&0x01) j++;
	 datTP>>=1;
	 }
	 j%=2;
	 if(j) clb(PS2dat);
     else  slb(PS2dat); // sda=!P; // /parity
//================data over
  WhileTout((r_bit(PS2clk)==0),Toutcnt,1000);
  WhileTout((r_bit(PS2clk)),Toutcnt,1000);
  slb(PS2dat);//sda=1;
         in(PS2dat);
         in(PS2clk);
    WhileTout((r_bit(PS2clk) ||r_bit(PS2dat) ),Toutcnt,1000);
    WhileTout((r_bit(PS2clk)==0 ||r_bit(PS2dat)==0 ),Toutcnt,1000);
 
 return ok; 
}



uint8 mouse_read(void)
{uint8 i;
uint16 waitcnt=0;

here:if(io_dat_cnt) {i=r_io_fifo();
 #if uart_debug_mouse==1 
 uart_send1(i);
 #endif
return i;}
else  {if(waitcnt++>60)  return error; 
       else {_delay_ms(5);goto here;}}
}

uint8 mouse_read2(void)
{uint8 i;


here: if(io_dat_cnt) {i=r_io_fifo();return i;}
else goto here;
}
//**********************************************if(ps_m_cnt>=11) {ps_m_cnt=0;} 
#define   MOUSE_Reset	           0xff
#define   MOUSE_Set_Resolution   0xe8
#define   MOUSE_Set_Scaling 	 0xe6
#define   MOUSE_Set_Remote_Mode  0xf0
#define   MOUSE_Set_Stream_Mode  0xea
#define   MOUSE_Get_device_ID	   0xf2
#define   MOUSE_Set_Sample_Rate    0xf3
#define   MOUSE_Acknowledge 	   0xfa
#define   MOUSE_REsend 	           0xfE

uint8 reset_mouse(void) 
{ 

  slb(PS2dat);slb(PS2clk);//sda=1;
  in(PS2dat); in(PS2clk);
  
  use_interrupt2(Int2down_req);
 #if uart_debug_mouse==1 
  uart_send1('A');
  #endif
  //========reset  org
uint8  retry=0;
for(retry=0;retry<8;retry++)
  {if(Command2mouse(MOUSE_Reset)==error)    // 重启 
                              return error;
  if(mouse_read()!=MOUSE_REsend)   break;      // 鼠标的回答 
   }
  mouse_read();         // 重启成功. 0xaa  
  mouse_read();         //回应鼠标ID 0x00
//====================== 
 #if uart_debug_mouse==1 
  uart_send1('B');
  #endif
for(retry=0;retry<8;retry++)
  {Command2mouse(MOUSE_Reset);     // 重启 
  if(mouse_read()!=MOUSE_REsend)   break;      // 鼠标的回答 
   }
  mouse_read();         // 重启成功. 0xaa  
  mouse_read();         //回应鼠标ID 0x00
//==================   //attempt to enter MS scroll mouse mode
  Command2mouse(MOUSE_Set_Sample_Rate);     // 进入滚轮模式 
  mouse_read();         // 读鼠标的应答 
   Command2mouse(200);      
  mouse_read();  
   
   Command2mouse(MOUSE_Set_Sample_Rate);     // 进入滚轮模式 
  mouse_read();         // 读鼠标的应答 
  Command2mouse(100);      
  mouse_read(); 
     Command2mouse(MOUSE_Set_Sample_Rate);     // 进入滚轮模式 
  mouse_read();         // 读鼠标的应答 
  Command2mouse(80);      
  mouse_read();  
//======================
   Command2mouse(MOUSE_Get_device_ID);     // mouse id get
   mouse_read();         // 读鼠标的应  fa
  if( mouse_read()!=0x03) return error;         // 读鼠标的应答  id  0x03 is scroll mouse 
 //==========
     Command2mouse( MOUSE_Set_Resolution);     //set  
  mouse_read();         // 读鼠标的应答 
  Command2mouse(0x03);    //8counters per mm  
  mouse_read();  
  //===============
    Command2mouse(MOUSE_Set_Scaling );     //set  1:1
  mouse_read();         // 读鼠标的应答 
  //===============
    Command2mouse( MOUSE_Set_Sample_Rate);     //set  
  mouse_read();         // 读鼠标的应答 
  Command2mouse(40);    //8counters per mm  
  mouse_read();  
  //===============
  
for(retry=0;retry<8;retry++)//enable it
  {Command2mouse(0xf4);     // 
  if(mouse_read()==MOUSE_Acknowledge)   break;      // 鼠标的回答 
   }
 #if uart_debug_mouse==1 
  uart_send1('C');
  #endif
   return ok;
 //============now it is over 
 
}
#define LeftBnt    0
#define RightBtn    1
#define MidBtn    2
#define Always1    3
#define XsignB    4
#define YsignB    5
#define XOverFlow    6
#define yOverFlow    7

//===================
uint8  MouseMsg;
void MouseSev(void)
{

 uint8  mouse_x,mouse_y,mouse_z,mouse_status;  
    if(io_dat_cnt>=4 )
	 {
      mouse_status = mouse_read2();//读取四个字节的信号 
      mouse_x = mouse_read2(); 
      mouse_y = mouse_read2(); 
      mouse_z = mouse_read2();
	 //if(mouse_status&(1<<LeftBnt)) //uart_send1('1');
	 //if(mouse_status&(1<<RightBtn)) //uart_send1('2');   
	 //if(mouse_status&(1<<MidBtn)) //uart_send1('3'); 
	  //uart_send1(mouse_z);
      MouseMsg=0;
	  MouseMsg|=mouse_status&07;
	  MouseMsg|=((mouse_z<<4)&0xf0);
 	  if(MouseMsg) OSTaskResume(1);
	  }
	   
}