Aly's branch

Digit_Input.s

@@ -0,0 +1,368 @@
+#include <xc.inc>
+
+global	User_Input_Setup, Press_Clear
+extrn	Keypad_Read
+extrn	LCD_Write_Message, LCD_Clear, Second_Line, Shift_Left
+extrn	input_address_1, input_address_2, delay_ms, start
+;extrn	cordic_loop
+
+psect	udata_acs		    ; reserve data space in access ram
+digit_counter:	ds 1
+d1:		ds 1
+d2:		ds 1
+input_1:	ds 1
+input_2:	ds 1
+before_dec:	ds 1
+enter:		ds 1
+clear:		ds 1
+
+
+psect	udata_bank4		    ; reserve data anywhere in RAM
+myArray:    ds 0x80
+
+psect input_code, class=CODE
+
+User_Input_Setup:
+	Input_1:
+	    call	User_Input_1	; Input first digit
+
+	Input_2:
+	    call	User_Input_2	; Input second digit 
+
+Add_Input:
+    movff	input_1, WREG	    ; adding together the two digits to
+				    ; create one 8 bit number
+    addwf	input_2, W
+    movwf	before_dec
+
+    call	delay_ms
+    call	delay_ms
+    call	delay_ms
+
+Press_Enter:			    ; Checks to see if E button pressed
+    call	Keypad_Read
+    call	Decode_Enter
+    movwf	enter
+
+    movlw	0xFF
+    call	delay_ms
+
+    movlw	0xFF
+    cpfslt	enter
+    bra		Press_Enter
+
+    call	LCD_Clear	   ; Clear screen 
+    ;call	cordic_loop	   ; Calculate cosine and sine values 
+
+return
+
+Press_Clear:			   ; Checks to see if C button pressed
+    call    Keypad_Read
+    call    Decode_Clear
+    movwf   clear
+
+    movlw   0xFF
+    call    delay_ms
+
+    movlw   0xFF
+    cpfslt  clear
+    bra	    Press_Clear
+
+    call    LCD_Clear		    ; Clear Screen 
+
+    return	    
+
+User_Input_1:
+    movlw	input_address_1	    ; address to store first digit
+    movwf	FSR0
+
+    call	Keypad_Read	    ; finds button pressed and stores in WREG
+    call	Decode_Input_1	    ; Decodes digit
+    movwf	input_1
+
+    movlw	0xFF
+    call	delay_ms
+
+    movlw	0xFF
+    cpfslt	input_1		    ; Checks for valid input
+    bra		User_Input_1	    ; repeat if valid button not pressed
+
+    movlw	input_address_1
+    movwf	FSR2
+    movlw	1
+    call	LCD_Write_Message 
+
+    return
+
+User_Input_2:
+    movlw	input_address_2	    ; address to store second digit
+    movwf	FSR0
+
+    call	Keypad_Read	    ; finds button pressed and stores in WREG
+    call	Decode_Input_2	    ; Decodes digit 
+    movwf	input_2
+
+    movlw	0xFF
+    call	delay_ms
+
+    movlw	0x7B
+    cpfseq	input_2
+    bra		No_Backspace
+    goto	Backspace
+
+    No_Backspace:
+    movlw	0xFF
+    cpfslt	input_2		    ; Checks for valid input 
+    bra		User_Input_2	    ; repeat if valid button not pressed
+
+    movlw	input_address_2
+    movwf	FSR2
+    movlw	1
+    call	LCD_Write_Message 
+
+    return 
+
+Backspace:
+    call    Shift_Left			; backspace = shift cursor left and 
+					    ; print a space 
+    movlw   'N'
+
+    movwf   FSR2
+    movlw   1
+    call    LCD_Write_Message
+    goto    Input_1
+
+Decode_Input_1:
+    movwf   d1, A
+
+    Error_Check_1:
+	movlw   0xFF		    
+	cpfseq  d1, A
+	bra	Decode_0_1
+	retlw   0xFF
+
+    Decode_0_1:
+	movlw   0x7D
+	cpfseq  d1, A
+	bra	Decode_1_1
+	movlw   '0'	    
+	movwf   INDF0
+	incf    FSR0
+	retlw   0
+
+    Decode_1_1:
+	movlw   0xEE
+	cpfseq  d1, A
+	bra	Decode_2_1
+	movlw   '1'
+	movwf   INDF0
+	incf    FSR0
+	retlw   10			   ; stores first digit as tens 
+
+    Decode_2_1:
+	movlw   0xED
+	cpfseq  d1, A
+	bra	Decode_3_1
+	movlw   '2'
+	movwf   INDF0
+	incf    FSR0
+	retlw   20
+
+    Decode_3_1:
+	movlw   0xEB
+	cpfseq  d1, A
+	bra	Decode_4_1
+	movlw   '3'
+	movwf   INDF0
+	incf    FSR0
+	retlw   30
+
+    Decode_4_1:
+	movlw   0xDE
+	cpfseq  d1, A
+	bra	Decode_5_1
+	movlw   '4'
+	movwf   INDF0
+	incf    FSR0
+	retlw   40
+
+    Decode_5_1:
+	movlw   0xDD
+	cpfseq  d1, A
+	bra	Decode_6_1
+	movlw   '5'
+	movwf   INDF0
+	incf    FSR0
+	retlw   50
+
+    Decode_6_1:
+	movlw   0xDB
+	cpfseq  d1, A
+	bra	Decode_7_1
+	movlw   '6'
+	movwf   INDF0
+	incf    FSR0
+	retlw   60
+
+    Decode_7_1:
+	movlw   0xBE
+	cpfseq  d1, A
+	bra	Decode_8_1
+	movlw   '7'
+	movwf   INDF0
+	incf    FSR0
+	retlw   70
+
+    Decode_8_1:
+	movlw   0xBD
+	cpfseq  d1, A
+	bra	Decode_9_1
+	movlw   '8'
+	movwf   INDF0
+	incf    FSR0
+	retlw   80
+
+    Decode_9_1:
+	movlw   0xBB
+	cpfseq  d1, A
+	retlw   0xFF
+	movlw   '9'
+	movwf   INDF0
+	incf    FSR0
+	retlw   90
+
+Decode_Input_2:
+    movwf   d2, A
+
+    Error_Check_2:
+	movlw   0xFF  
+	cpfseq  d2, A
+	bra	Decode_0_2
+	retlw   0xFF
+
+    Decode_0_2:
+	movlw   0x7D
+	cpfseq  d2, A
+	bra	Decode_1_2
+	movlw   '0'
+	movwf   INDF0
+	incf    FSR0
+	retlw   0
+
+    Decode_1_2:
+	movlw   0xEE
+	cpfseq  d2, A
+	bra	Decode_2_2
+	movlw   '1'
+	movwf   INDF0
+	incf    FSR0
+	retlw   1				; stores second digit as units 			
+
+    Decode_2_2:
+	movlw   0xED
+	cpfseq  d2, A
+	bra	Decode_3_2
+	movlw   '2'
+	movwf   INDF0
+	incf    FSR0
+	retlw   2
+
+    Decode_3_2:
+	movlw   0xEB
+	cpfseq  d2, A
+	bra	Decode_4_2
+	movlw   '3'
+	movwf   INDF0
+	incf    FSR0
+	retlw   3
+
+    Decode_4_2:
+	movlw   0xDE
+	cpfseq  d2, A
+	bra	Decode_5_2
+	movlw   '4'
+	movwf   INDF0
+	incf    FSR0
+	retlw   4
+
+    Decode_5_2:
+	movlw   0xDD
+	cpfseq  d2, A
+	bra	Decode_6_2
+	movlw   '5'
+	movwf   INDF0
+	incf    FSR0
+	retlw   5
+
+    Decode_6_2:
+	movlw   0xDB
+	cpfseq  d2, A
+	bra	Decode_7_2
+	movlw   '6'
+	movwf   INDF0
+	incf    FSR0
+	retlw   6
+
+    Decode_7_2:
+	movlw   0xBE
+	cpfseq  d2, A
+	bra	Decode_8_2
+	movlw   '7'
+	movwf   INDF0
+	incf    FSR0
+	retlw   7
+
+    Decode_8_2:
+	movlw   0xBD
+	cpfseq  d2, A
+	bra	Decode_B_2
+	movlw   '8'
+	movwf   INDF0
+	incf    FSR0
+	retlw   8
+
+    Decode_B_2:
+	movlw   0x7B
+	cpfseq  d2, A
+	bra	Decode_9_2
+	retlw	0x7B
+
+    Decode_9_2:
+	movlw   0xBB
+	cpfseq  d2, A
+	retlw   0xFF
+	movlw   '9'
+	movwf   INDF0
+	incf    FSR0
+	retlw   9
+
+
+Decode_Enter:
+    movwf   enter, A
+
+    Error_Check_E:
+	movlw   0xFF		    
+	cpfseq  enter, A
+	bra	Decode_E
+	retlw   0xFF
+
+    Decode_E:
+	movlw   0xD7
+	cpfseq  enter, A
+	retlw	0xFF
+	return 
+
+Decode_Clear:
+    movwf   clear, A
+
+    Error_Check_C:
+	movlw	0xFF
+	cpfseq	clear, A
+	bra	Decode_C
+	retlw	0xFF
+
+    Decode_C:
+	movlw	0x77
+	cpfseq	clear, A
+	retlw	0xFF
+	return