LET US CODE BUJJI BUG PART 1.

Let us start learning to code BUJJI BUG.
Let us start with a simple program to generate a DASH or DAH.
We are using 12F683 as this is small footprint IC only 8 pins
Please see the circuit diagram and picture as given below:

Circuit Diagram

Picture

Here is the code:

; BUJJI BUG
; CODE FOR DASH generation
list p = 12F683 ; Selected 12f683
  #include <P12F683.inc> ; Including the headerfile
; In this program we are generating DAH(DASH)
; here GPIO 5 (pin no. 2) is pulled to HIGH by the resistor
; external paddle is connected to this pin,
; when it is pulled-down/grounded (pin no.2) The KEY OUT GPIO 1 is send to HIGH (5 volts).
; otherwise KEY OUT will be in the LOW state(0 volts).
; To verify we connect an LED from pin  no 6 with a resistor 2K7.
;........................................................................................
  ORG 0X00                                     ; Stating address for microcontroller
  CLRW                                  ; Clearing the W register.
  NOP          ; NO operation
  NOP                                   ; NO operation
  NOP                          ; NO operation
NOP                                    ; NO operation
  goto   START ; starting the program
         START CLRF GPIO ; Clearing the INPUT OUTPUT Port register
  MOVLW 0x07 ; Moving the "7" into the W register
  MOVWF CMCON0       ; Disabling the comparators by passing "7" in the CMCON0                                                                                                                               ; register

  BSF STATUS,RP0 ; Changing to bank 1, because ANSEl is in Bank 1
  CLRF ANSEL ; Initialising the IO ports as a Digital by clearing the ANSEL                                                                                                                             ; register
  MOVLW 0x38 ; Moving "38" into the W register
  MOVWF TRISIO ; Making the GP3,GP4,GP5(pin no 2 of IC) as INPUT and
NOP                                     ; GP0,GP1(pin no 6 of IC),GP2 OUTPUTS by passing the                                                                                                                            ; value into TRISIO register
BCF STATUS,RP0 ; We have to come back to bank 0 then only program will                                                                                                                              ; run.
goto                 begin               ; Goto begin
;...........................................................................................
        dashON BSF GPIO,1            ; When the input is LOW(ZERO) make the GPIO pin 1 as                                                                                                                              ; HIGH (LED IS ON)
goto run ; goto Run to check the condition and repeat the loop for                                                                                                                                 ; ever

        dashOFF BCF GPIO,1 ; When the input is HIGH make the GPIO pin 1 as LOW                                                                                                                               ; LED is OFF)
goto                 run ; goto run to check the condition and repeat the loop
;............................................................................................
       begin NOP
        run BTFSS GPIO,5 ; Checking the Input status of the GP5 (PIN no 2 of IC)
goto dashON ; If it is Clear(ZERO) goto dashON otherwise
goto dashOFF ; goto DashOFF
end ; End of the program

Here is the HEX code:

:020000040000FA
:100000000301000000000000000006288501073001
:10001000990083169F0138308500831213288514B8
:0E0020001428851014280000851E0F281128B2
:00000001FF

Happy homebrewing!