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'----------------------------------------------------------------------------
' PC AT-KEYBOARD Sample
' (c) 2001-2003 MCS Electronics
'----------------------------------------------------------------------------
'For this example :
'connect PC AT keyboard clock to PIND.2 on the 8535
'connect PC AT keyboard data to PIND.4 on the 8535
$regfile = "m16def.dat"
$crystal = 8000000
Waitms 100
$baud = 19200
'The GetATKBD() function does not use an interrupt.
'But we use INT0 to handle it with interrupts
Config Portc = Output
Config Portd = Input
Set Portd
Config Lcd = 16 * 2
Config Lcdpin = Pin , Db4 = Portc.3 , Db5 = Portc.2 , Db6 = Portc.1 , Db7 = Portc.0 , E = Portc.4 , Rs = Portc.5
'configure the pins to use for the clock and data
'can be any pin that can serve as an input
'Keydata is the label of the key translation table
Config Keyboard = Pind.2 , Data = Pind.6 , Keydata = Keydata
Config Portd.7 = Output
'variables needed for the buffer
Const Bufsize = 10
Dim Buf As String * Bufsize , _rkbd As Byte , _wkbd As Byte , _ckbd As Byte
'we need int0 that gets triggered when there is a key pressed
On Int0 Isr0 Nosave
Enable Int0
Enable Interrupts
'Dim some used variables
Dim S As String * 12
Dim B As Byte
'In this example we use SERIAL(COM) INPUT redirection
$serialinput = Mykbd
Cls
'Show the program is running
Lcd "hello"
Set Portd.7
Do
'The following code is remarked but show how to use the GetATKBD() function
'****** ettől lefagy**
'B = Getatkbd()
' **************
'get a byte and store it into byte variable
'When no real key is pressed the result is 0
'So test if the result was > 0
If B > 0 Then
Cls
Lcd B ; Chr(b)
End If
Toggle Portd.7
'The purpose of this sample was how to use a PC AT keyboard
'The input that normally comes from the serial port is redirected to the
'external keyboard so you use it to type
' the wait will demonstrate that it works on the background
Wait 1
'Input "Name " , S
'and show the result
'Print S
Loop
End
' this routine gets called when INPUT is used
'it expects the data in R24
Mykbd:
lds r24,{_ckbd} ; get counter
tst r24
breq mykbd ;0 so test again
dec r24 ;adjust counter byte
sts {_ckbd},r24 ;store
push r25 ;save
lds r25,{_rkbd} ;get read pointer
Loadadr Buf , X
add r26,r25
clr r24
adc r27,r24
ld r24,x
inc r25
cpi r25,bufsize
brne mykbd1
clr r25
Mykbd1:
sts {_rkbd},r25
pop r25
Return
'Since we do a redirection we call the routine from the redirection routine
'
Isr0:
'we come here when input is required from the COM port
'So we pass the key into R24 with the GetATkbd function
' We need some ASM code to save the registers used by the function
$asm
push r16 ; save used register
push r25
push r26
push r27
push r24
in r24,sreg
push r24
rCall _getatkbd ; call the function
tst r24 ; check for zero
breq Kbdinput1a ; yes
push r24
lds r25,{_ckbd} ; get byte counter
inc r25
sts {_ckbd},r25 ; save number of bytes in buffer
lds r25,{_wkbd} ; get write pointer
Loadadr Buf , X
add r26,r25 ; add pointer to it
clr r24
adc r27,r24
pop r24
st x,r24 ; save data in buffer
inc r25 ; increase write buffer pointer
cpi r25,bufsize ; is it at the end?
Brne kbdinput1
clr r25
Kbdinput1:
sts {_wkbd},r25 ; save write pointer
Kbdinput1a:
pop r24
!out sreg,r24
pop r24
pop r27 ; we got a valid key so restore registers
pop r26
pop r25
pop r16
$end Asm
'just return
Return
B = Getatkbd()
'This is the key translation table
Keydata:
'normal keys lower case
Data 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , &H5E , 0
Data 0 , 0 , 0 , 0 , 0 , 113 , 49 , 0 , 0 , 0 , 122 , 115 , 97 , 119 , 50 , 0
Data 0 , 99 , 120 , 100 , 101 , 52 , 51 , 0 , 0 , 32 , 118 , 102 , 116 , 114 , 53 , 0
Data 0 , 110 , 98 , 104 , 103 , 121 , 54 , 7 , 8 , 44 , 109 , 106 , 117 , 55 , 56 , 0
Data 0 , 44 , 107 , 105 , 111 , 48 , 57 , 0 , 0 , 46 , 45 , 108 , 48 , 112 , 43 , 0
Data 0 , 0 , 0 , 0 , 0 , 92 , 0 , 0 , 0 , 0 , 13 , 0 , 0 , 92 , 0 , 0
Data 0 , 60 , 0 , 0 , 0 , 0 , 8 , 0 , 0 , 49 , 0 , 52 , 55 , 0 , 0 , 0
Data 48 , 44 , 50 , 53 , 54 , 56 , 0 , 0 , 0 , 43 , 51 , 45 , 42 , 57 , 0 , 0
'shifted keys UPPER case
Data 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0
Data 0 , 0 , 0 , 0 , 0 , 81 , 33 , 0 , 0 , 0 , 90 , 83 , 65 , 87 , 34 , 0
Data 0 , 67 , 88 , 68 , 69 , 0 , 35 , 0 , 0 , 32 , 86 , 70 , 84 , 82 , 37 , 0
Data 0 , 78 , 66 , 72 , 71 , 89 , 38 , 0 , 0 , 76 , 77 , 74 , 85 , 47 , 40 , 0
Data 0 , 59 , 75 , 73 , 79 , 61 , 41 , 0 , 0 , 58 , 95 , 76 , 48 , 80 , 63 , 0
Data 0 , 0 , 0 , 0 , 0 , 96 , 0 , 0 , 0 , 0 , 13 , 94 , 0 , 42 , 0 , 0
Data 0 , 62 , 0 , 0 , 0 , 8 , 0 , 0 , 49 , 0 , 52 , 55 , 0 , 0 , 0 , 0
Data 48 , 44 , 50 , 53 , 54 , 56 , 0 , 0 , 0 , 43 , 51 , 45 , 42 , 57 , 0 , 0
De, biztos megint én vagyok láma 
