keyled.c

一个具体的项目程序

#include  "my_head.h"
//#include  "key.h"
/*********************************************/
#define   SPI_HEAD_CHAR    0X00
#define   SPI_TAIL_CHAR    0xFF
#define   KEYBORD_ORDOR    0x01
#define   DIS_DAT_ORDOR    0X02
#define   DIS_LED_ORDOR    0X03
#define   FLASH_LED_ORDOR  0X04
/*********************************************/
#define   LEDKEY_CTL    P3_3   //int1
bit   ledkey_dat_flag = FALSE;
void  Key_Int1(void)interrupt 2 using 1 //for LED_KEY_SPI
{
  //IE1 = 0;
  ledkey_dat_flag = TRUE;
  //P2_7 ^= 1;    //BUZZER for test
}

#define   BUF_SIZE        22
//================================
extern unsigned char pdata  Rf_Buffer[];
//BYTE  idata  spi_rbuf[BUF_SIZE-2];
BYTE  spi_rbuf_count = 0;
bit   spi_save_flag  = FALSE;
bit   spi_fram_flag  = FALSE;
void  SpiKeyReceive(BYTE  ch)
{
   if(ch==SPI_TAIL_CHAR)
   {
    spi_save_flag=FALSE;
	if(spi_rbuf_count>0)spi_fram_flag=TRUE;
    return;
   }
   if(ch==SPI_HEAD_CHAR)
   {
   	spi_fram_flag=FALSE;
    spi_save_flag=TRUE;
	spi_rbuf_count=0;
	return;
   }
   if(spi_save_flag)
   {
    if(spi_rbuf_count<BUF_SIZE-2)Rf_Buffer[spi_rbuf_count++]=ch;
   }
}


void  clear_spi_rbuf(void)
{
   	spi_fram_flag=FALSE;
    spi_save_flag=FALSE;
	spi_rbuf_count=0;
}


void Init_KeyLed(void)
{
   EA     = 0;
   IP    &= ~0X04;  //优先级0
   //IPH  &= ~0X04;
   IT1    = 1;
   EX1    = 1;
   EA     = 1;

   LEDKEY_CTL  =  1;
   clear_spi_rbuf();
}


void  kbint_open(void)
{
  LEDKEY_CTL   =  1;
  IE1  =  0;
  EX1  =  1;
}


void  kbint_close(void)
{
  EX1   =  0;
}


BYTE  Get_SpiReceiveDat(BYTE  *buf)
{
   BYTE  ii;
   if(spi_fram_flag==FALSE)return(0);
   *buf++ = Rf_Buffer[0];
   for(ii=1;ii<spi_rbuf_count;ii++,buf++)
   {
    *buf =(Rf_Buffer[ii]<<4);
	ii++;
	*buf |=(Rf_Buffer[ii]&0xf);
   }
   clear_spi_rbuf();
   return(ii/2+1);
}


BYTE  Set_SpiSendDat(BYTE  *buf,BYTE  size,BYTE ordor,BYTE  *spi_sbuf)
{
  BYTE  ii=0;
  if((size<1)||(size>9))return(ii);
  spi_sbuf[ii++]=SPI_HEAD_CHAR;
  spi_sbuf[ii++]=ordor;
  for(;ii<size*2+2;buf++)
  {
   spi_sbuf[ii++]=0x30|(*buf>>4);
   spi_sbuf[ii++]=0x30|(*buf&0xf);
  }
  spi_sbuf[ii++]=SPI_TAIL_CHAR;
  return(ii);
}


void  SpiKey_SendStr(BYTE *ptr,BYTE count)
{
   BYTE  ii;
   for(ii=0;ii<count;ii++)
   {
     SpiKeyReceive(KeySpiByte_SendReceive(ptr[ii]));
   }
}


void  Display_str(BYTE  str[])
{
   BYTE  i;
   BYTE  idata  spi_sbuf[BUF_SIZE+1];
   i=Set_SpiSendDat(str,8,DIS_DAT_ORDOR,spi_sbuf);
   kbint_close();
   LEDKEY_CTL =0;
   SpiKey_SendStr(spi_sbuf,i);
   LEDKEY_CTL =1;
   kbint_open();
}


void  Do_Led(BYTE  led_dat)
{
   BYTE  i;
   BYTE  idata  spi_sbuf[10];
   i=Set_SpiSendDat(&led_dat,1,DIS_LED_ORDOR,spi_sbuf);
   kbint_close();
   LEDKEY_CTL =0;
   SpiKey_SendStr(spi_sbuf,i);
   LEDKEY_CTL =1;
   kbint_open();
}


void  Do_DisLed_Flash(BYTE  disflash,BYTE ledflash,BYTE  flashtime)
{
   BYTE  i,buf[3];
   BYTE  idata  spi_sbuf[10];
   buf[0]=disflash;
   buf[1]=ledflash;
   buf[2]=flashtime;
   i=Set_SpiSendDat(buf,3,FLASH_LED_ORDOR,spi_sbuf);
   kbint_close();
   LEDKEY_CTL =0;
   SpiKey_SendStr(spi_sbuf,i);
   LEDKEY_CTL =1;
   kbint_open();
}


BYTE  Check_Key_Event(void)
{
   BYTE i,buf[8];
   if(!ledkey_dat_flag)return(1);
   do_buzzer(BUZZER_WAIT);
   kbint_close();
   LEDKEY_CTL =0;
   for(i=9;i--;)buf[i]=0xff;
   clear_spi_rbuf();
   Set_Timer20ms(2);
   while(!spi_fram_flag)
   {
    SpiKey_SendStr(buf,1);
    if(!Get_Timer20ms())break;
   }
   LEDKEY_CTL=1;
   kbint_open();
   ledkey_dat_flag = FALSE;
   //----------------------
   //do_buzzer(2);SendStr(spi_rbuf,BUF_SIZE-2); //for test.
   if( !Get_SpiReceiveDat(buf) || (buf[0]!=KEYBORD_ORDOR) )return(2);

   PostMessage(KEY_PRESS_EVENT,buf[1]);
   return(0);
}