我想请教一个问题？？？？？？？

goldbirderman

    我有一块STM8 PA有8个IO口，其中一个用来模数转换，只有7只脚接数码管的b-g脚，a脚接PB的IO口，那怎样把PA和PB同时一起显示1，2，3，4.......那样，PA可以写0XFF数值，可是PB和PA怎样连一起写数据？

操作系统

数据管显示编程也可以一个BIT ,一个BIT的来显示.只是要求扫描速度快一点.这样子的 ,硬件线路可以随便接.

这是一个万能例程..可以显示任何数据码的.你看明白了就会显示任何数码管了.
DISPLAY()
{
  IF DISN < LED_SHU ELSE DISN = 0
  A = GTA_STP#DISN
  CALLA
  IOSTA = 0XFF
  IOSTB = 0X0F
  IF TASK ELSE RET
  DISN ++
  IF DISN < LED_SHU ELSE CALL NEWBUF
  A = GTA_0#DISN
  GOTOA
}
GTA_STP:
STOP_BORTB.2----1
STOP_BORTB.2----2
STOP_BORTB.2----3
STOP_BORTB.0----4
STOP_BORTB.0----5
STOP_BORTB.0----6
STOP_BORTB.0----7
STOP_BORTB.0----8
STOP_BORTB.3----9
STOP_BORTB.3----10
STOP_A;PORTA.0----11
STOP_B;PORTB.2----12
STOP_B;PORTB.2----13
STOP_B;PORTB.2----14
STOP_B;PORTB.2----15
STOP_B;PORTB.0----16
STOP_A;PORTA.4----17
STOP_A;PORTA.6----18
STOP_B;PORTB.3----19
STOP_A;PORTA.0----20
STOP_B;PORTB.3----21
STOP_A;PORTA.6----22
STOP_A;PORTA.7----23
STOP_A;PORTA.4----24
STOP_A;PORTA.4----25
STOP_A;PORTA.6----26
STOP_B;PORTB.3----27
STOP_A;PORTA.0----28
STOP_B;PORTB.3----29
STOP_A;PORTA.6----30
STOP_A;PORTA.7----31
STOP_B;PORTB.3----32
STOP_A;PORTA.4----33
STOP_A;PORTA.6----34
STOP_A;PORTA.0----35
STOP_A;PORTA.0----36
STOP_A;PORTA.0----37
STOP_A;PORTA.6----38
STOP_A;PORTA.7----39
STOP_A;PORTA.6----40
STOP_A;PORTA.4----41
STOP_A;PORTA.4----42
STOP_A;PORTA.7----43
STOP_A;PORTA.7----44
STOP_A;PORTA.7----45
STOP_A;PORTA.4----46
STOP_A;PORTA.7----47
STOP_A;PORTA.0----48
STOP_A()
{
  PORTA & 0B00101110
}
STOP_B()
{
  PORTB = 0
}
GTA_0:
DIS0
DIS1
DIS2
DIS3
DIS4
DIS5
DIS6
DIS7
DIS8
DIS9
DIS10
DIS11
DIS12
DIS13
DIS14
DIS15
DIS16
DIS17
DIS18
DIS19
DIS20
DIS21
DIS22
DIS23
DIS24
DIS25
DIS26
DIS27
DIS28
DIS29
DIS30
DIS31
DIS32
DIS33
DIS34
DIS35
DIS36
DIS37
DIS38
DIS39
DIS40
DIS41
DIS42
DIS43
DIS44
DIS45
DIS46
DIS47
DIS0()
{
  IF BUF0.0
  {
   IOSTB = 0X3;6 4
   DS6 = 1
  }
}
DIS1()
{
  IF BUF0.1
  {
   IOSTB = 0XA;6 7
   DS6 = 1
  }
}
DIS2()
{
  IF BUF0.2
  {
   IOSTB = 0XB
   IOSTA = 0XBF;6 2
   DS6 = 1
  }
}
DIS3()
{
  IF BUF0.3
  {
   IOSTB = 0XC;7 8
   DS7 = 1
  }
}
DIS4()
{
  IF BUF0.4
  {
   IOSTB = 0XE
   IOSTA = 0XBF;7 2
   DS7 = 1
  }
}
DIS5()
{
  IF BUF0.5
  {
   IOSTB = 0XA;7 6
   DS7 = 1
  }
}
DIS6()
{
  IF BUF0.6
  {
   IOSTB = 0XE
   IOSTA = 0XFE;7 5
   DS7 = 1
  }
}
DIS7()
{
  IF BUF0.7
  {
   IOSTB = 0XE
   IOSTA = 0X7F;7 3
   DS7 = 1
  }
}
DIS8()
{
  IF BUF1.0
  {
   IOSTB = 0X3;4 6
   DS4 = 1
  }
}
DIS9()
{
  IF BUF1.1
  {
   IOSTB = 0X5;4 8
   DS4 = 1
  }
}
DIS10()
{
  IF BUF1.2
  {
   IOSTA = 0XFE
   IOSTB = 0XD;5 8
   DS5 = 1
  }
}
DIS11()
{
  IF BUF1.3
  {
   IOSTB = 0X9;6 8
   DS6 = 1
  }
}
DIS12()
{
  IF BUF1.4
  {
   IOSTB = 0XB
   IOSTA = 0XEF;6 1
   DS6 = 1
  }
}
DIS13()
{
  IF BUF1.5
  {
   IOSTB = 0XB
   IOSTA = 0X7F;6 3
   DS6 = 1
  }
}
DIS14()
{
  IF BUF1.6
  {
   IOSTB = 0XB
   IOSTA = 0XFE;6 5
   DS6 = 1
  }
}
DIS15()
{
  IF BUF1.7
  {
   IOSTB = 0X6;7 4
   DS7 = 1
  }
}
;;===============
DIS16()
{
  IF BUF2.0
  {
   IOSTA = 0XEF
   IOSTB = 0XD;1 8
   DS1 = 1
  }
}
DIS17()
{
  IF BUF2.1
  {
   IOSTA = 0XBF
   IOSTB = 0XB;2 6
   DS2 = 1
  }
}
DIS18()
{
  IF BUF2.2
  {
   IOSTB = 0X7
   IOSTA = 0XFE;4 5
   DS4 = 1
  }
}
DIS19()
{
  IF BUF2.3
  {
   IOSTA = 0XFE
   IOSTB = 0XE;5 7
   DS5 = 1
  }
}
DIS20()
{
  IF BUF2.4
  {
   IOSTB = 0X6;4 7
   DS4 = 1
  }
}
DIS21()
{
  IF BUF2.5
  {
   IOSTA = 0XBF
   IOSTB = 0XD;2 8
   DS2 = 1
  }
}
DIS22()
{
  IF BUF2.6
  {
   IOSTA = 0X7F
   IOSTB = 0XB;3 6
   DS3 = 1
  }
}
DIS23()
{
  IF BUF2.7
  {
   IOSTA = 0XEE;1 5
   DS1 = 1
  }
}
DIS24()
{
  IF BUF3.0
  {
   IOSTA = 0XEF
   IOSTB = 0XB;1 6
   DS1 = 1
  }
}
DIS25()
{
  IF BUF3.1
  {
   IOSTA = 0XAF;2 1
   DS2 = 1
  }
}
DIS26()
{
  IF BUF3.2
  {
   IOSTB = 0X7
   IOSTA = 0XEF;4 1
   DS4 = 1
  }
}
DIS27()
{
  IF BUF3.3
  {
   IOSTA = 0XFE
   IOSTB = 0XB;5 6
   DS5 = 1
  }
}
DIS28()
{
  IF BUF3.4
  {
   IOSTB = 0X7
   IOSTA = 0X7F;4 3
   DS4 = 1
  }
}
DIS29()
{
  IF BUF3.5
  {
   IOSTA = 0X3F;2 3
   DS2 = 1
  }
}
DIS30()
{
  IF BUF3.6
  {
   IOSTA = 0X3F;3 2
   DS3 = 1
  }
}
DIS31()
{
  IF BUF3.7
  {
   IOSTB = 0X7
   IOSTA = 0XBF;4 2
   DS4 = 1
  }
}
;; ------DISBUF0
DIS32()
{
  IF BUF4.0
  {
   IOSTA = 0X6F;1 3
   DS1 = 1
  }
}
DIS33()
{
  IF BUF4.1
  {
   IOSTA = 0XBF
   IOSTB = 0XE;2 7
   DS2 = 1
  }
}
DIS34()
{
  IF BUF4.2
  {
   IOSTA = 0XBE;5 2
   DS5 = 1
  }
}
DIS35()
{
  IF BUF4.3
  {
   IOSTA = 0XEE;5 1
   DS5 = 1
  }
}
DIS36()
{
  IF BUF4.4
  {
   IOSTA = 0X7E;5 3
   DS5 = 1
  }
}
DIS37()
{
  IF BUF4.5
  {
   IOSTA = 0XBE;2 5
   DS2 = 1
  }
}
DIS38()
{
  IF BUF4.6
  {
   IOSTA = 0X6F;3 1
   DS3 = 1
  }
}
DIS39()
{
  IF BUF4.7
  {
   IOSTA = 0XBF
   IOSTB = 0X7;2 4
   DS2 = 1
  }
}
DIS40()
{
  IF BUF5.0
  {
   IOSTA = 0XEF
   IOSTB = 0XE;1 7
   DS1 = 1
  }
}
DIS41()
{
  IF BUF5.1
  {
   IOSTA = 0XAF;1 2
   DS1 = 1
  }
}
DIS42()
{
  IF BUF5.2
  {
   IOSTA = 0X7E;3 5
   DS3 = 1
  }
}
DIS43()
{
  IF BUF5.3
  {
   IOSTA = 0X7F
   IOSTB = 0XE;3 7
   DS3 = 1
  }
}
DIS44()
{
  IF BUF5.4
  {
   IOSTA = 0X7F
   IOSTB = 0XD;3 8
   DS3 = 1
  }
}
DIS45()
{
  IF BUF5.5
  {
   IOSTA = 0XEF
   IOSTB = 0X7;1 4
   DS1 = 1
  }
}
DIS46()
{
  IF BUF5.6
  {
   IOSTA = 0X7F
   IOSTB = 0X7;3 4
   DS3 = 1
  }
}
DIS47()
{
  IF BUF5.7
  {
   IOSTA = 0XFE
   IOSTB = 0X7;5 4
   DS5 = 1
  }
}