Hello, all. I need help on the following code. The msp430 is controlling a 7-segment display. After it runs thru 0-F, It stops at 0. The 4 input buttons act as binary numbers(0 or 1). I can only get the program to take one button input, thus only allowing
1000,0100,0010,and 0001. When i need 0001,0010,0011,0100,0101, etc. What can I do to perform this task?
Thank you very much for your time.
;
; This code provides a trivial example for demonstrating writing to the
; 1-digit display- mainly this will quickly cycle through each segment
; one at a time, then run a quick test of the 4 pushbuttons, by turning on
; the symbol 0,1,2,or 3 to indicate which one (only one) PB is pressed.
; Only capable of testing one pushbutton at a time, not combinations
;
;
;
; Target: TI LaunchPad development board with MSP430G2553 device with the
; custom 1 digit expansion Display Board installed
;
;
; HW I/O assignments:
;
; P1.0 (output) LED1 LaunchPad bd (active high)
; P1.1 (input) pushbutton (top) (active low) expansion bd
; P1.2 (input) pushbutton (second from top) (active low) expansion bd
; P1.3 (input) pushbutton on LaunchPad bd (active low)
; P1.4 (input) pushbutton (third from top) (active low) expansion bd
; P1.5 (input) pushbutton (bottom) (active low) expansion bd
; P1.6 (output) LED2 LaunchPad bd (active high)
; P1.7 (not used)
;
; P2.0 (output) Segment A (active high) drives display board
; P2.1 (output) Segment B (active high) drives display board
; P2.2 (output) Segment C (active high) drives display board
; P2.3 (output) Segment D (active high) drives display board
; P2.4 (output) Segment E (active high) drives display board
; P2.5 (output) Segment F (active high) drives display board
; P2.6 (output) Segment G (active high) drives display board
; P2.7 (output) Segment DP (active high) drives display board
;
;
;
;*******************************************************************************
#include "msp430g2553.h"
;-------------------------------------------------------------------------------
; Definition of Constants
;-------------------------------------------------------------------------------
LONG_DELAY EQU 65535 ; max 16 bit value (FFFFh)
;LONG_DELAY EQU 600 ; max 16 bit value (FFFFh)
SHORT_DELAY EQU 5000 ;
TIMER_A_COUNT_1 EQU 1000 ; set count value in TimerA_0
MAX_TIMER_COUNT EQU 50 ; number of Timer Interrupts that have to occur
SEG_A EQU %00000001 ; Port pin position P2.0
SEG_B EQU %00000010 ; Port pin position P2.1
SEG_C EQU %00000100 ; Port pin position P2.2
SEG_D EQU %00001000 ; Port pin position P2.3
SEG_E EQU %00010000 ; Port pin position P2.4
SEG_F EQU %00100000 ; Port pin position P2.5
SEG_G EQU %01000000 ; Port pin position P2.6
SEG_DP EQU %10000000 ; Port pin position P2.7
PB_0 EQU %00000010 ; Port pin position P1.1
PB_1 EQU %00000100 ; Port pin position P1.2
PB_2 EQU %00010000 ; Port pin position P1.4
PB_3 EQU %00100000 ; Port pin position P1.5
PB_LPBD EQU %00001000 ; Port pin position P1.3 (on LaunchPad bd)
SEG_PORT EQU P2OUT
PB_PORT EQU P1IN
ZERO EQU %00111111
ONE EQU %00000110
TWO EQU %01011011
THREE EQU %01001111
FOUR EQU %01100110
FIVE EQU %01101101
SIX EQU %01111100
SEVEN EQU %00000111
EIGHT EQU %01111111
NINE EQU %01100111
Letter_A EQU %01110111
Letter_B EQU %01111100
Letter_C EQU %00111001
Letter_D EQU %01011110
Letter_E EQU %01111001
Letter_F EQU %01110001
;-------------------------------------------------------------------------------
; Definition of Variables
;-------------------------------------------------------------------------------
ORG 0200h ; beginning of RAM space (necessary statement)
; no variables used in this simple example
;-------------------------------------------------------------------------------
ORG 0C000h ; Program Reset (prog memory start)
; this is Program memory start
; address for MSP430G2553 (16K)
;-------------------------------------------------------------------------------
RESET mov.w #0400h,SP ; Initialize stackpointer(to end of RAM +1)
; RAM is 512 bytes, last position is 3FFh
StopWDT mov.w #WDTPW+WDTHOLD,&WDTCTL ; Stop WDT
SetupP2 ;;;mov.b #0FFh, &P1DIR ; all as outputs
mov.b #0FFh, &P2DIR ; all as outputs to drive 7-seg LED
bic.b #0C0h, &P2SEL ; Clears the P2SEL bits so that
; P2.6 and P2.7 function as GPIO pins
mov.b #0BEh, &P1REN ;turn on the internal resistor for PB's
mov.b #0BEh, &P1OUT ; set the resistors to Pullup mode
; turn off all the segments
clr.b &SEG_PORT
DisplayTop
mov.b #ONE, &SEG_PORT ; crude approach
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #TWO, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #THREE, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #FOUR, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #FIVE, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #SIX, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #SEVEN, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #EIGHT, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #NINE, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #Letter_A, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #Letter_B, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #Letter_C, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #Letter_D, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #Letter_E, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
mov.b #Letter_F, &SEG_PORT
call #Delay_Long
call #Delay_Long
call #Delay_Long
call #Delay_Long
; turn off all the segments
clr.b &SEG_PORT
ReadPort1 ; will test for single button press but not combinations of buttons
; note buttons are in positions: 10BB1BB0
;The following comments are in the form (Button 1-4)
Part1
;(Bit 1)
;(HLLL)
cmp.b # 0BCh, &P1IN
jne Part2
jeq
Part2 cmp.b # 0BAh, &P1IN
jne Case_ONE
cmp.b # 0AEh, &P1IN
jne Case_THREE
cmp.b # 09Eh, &P1IN
;(LHLL)
; cmp.b # 0BAh, &P1IN
;jeq Case_TWO
;;(HHLL)
;jeq Case_THREE
;(LLHL)
; cmp.b # 0AEh, &P1IN
; jeq Case_FOUR
;(LLLH)
;cmp.b # 09Eh, &P1IN
;jeq Case_EIGHT
;(LLLL)
;jmp Case_ZERO ; no match (no single button is pressed at this time)
;Cases to make letters and numbers
;-------------------------------------------------------------------------------
Case_ZERO
mov.b #ZERO, &SEG_PORT
jmp Done
Case_ONE
mov.b #ONE, &SEG_PORT
jmp Done
Case_TWO
mov.b #TWO, &SEG_PORT
jmp Done
Case_THREE mov.b #THREE, &SEG_PORT
jmp Done
Case_FOUR
mov.b #FOUR, &SEG_PORT
jmp Done
Case_FIVE
mov.b #FIVE, &SEG_PORT
jmp Done
Case_SIX
mov.b #SIX, &SEG_PORT
jmp Done
Case_SEVEN
mov.b #SEVEN, &SEG_PORT
jmp Done
Case_EIGHT
mov.b #EIGHT, &SEG_PORT
jmp Done
Case_NINE
mov.b #NINE, &SEG_PORT
jmp Done
Case_A
mov.b #Letter_A, &SEG_PORT
jmp Done
Case_B
mov.b #Letter_B, &SEG_PORT
jmp Done
Case_C mov.b #Letter_C, &SEG_PORT
jmp Done
Case_D mov.b #Letter_D, &SEG_PORT
jmp Done
Case_E mov.b #Letter_E, &SEG_PORT
jmp Done
Case_F mov.b #Letter_F, &SEG_PORT
jmp Done
;-------------------------------------------------------------------------------
Done: call #Delay_Long
; turn off all the segments to clear results of last PB press
clr.b &SEG_PORT
; Go back to top
jmp ReadPort1
;-------------------------------------------------------------------------------
; End of main code
;-------------------------------------------------------------------------------
;-------------------------------------------------------------------------------
; Subroutines
;-------------------------------------------------------------------------------
;-------------------------------------------------------------------------------
; Delay_Long
; passed in - nothing
; returned - nothing
; accomplishes - long delay
; uses: R15
;-------------------------------------------------------------------------------
Delay_Long
push R15 ; save R15 since we use it here
DelayTopL
mov #LONG_DELAY, R15 ;load loop counter (R15) with Long Delay constant
Loop1Long
dec R15 ; decrement loop counter
jnz Loop1Long ; Zero yet?, no decrement again
pop R15 ; restore R15 before returning
ret ; return
;-------------------------------------------------------------------------------
; end of Delay_Long
;-------------------------------------------------------------------------------
;-------------------------------------------------------------------------------
; End of all Subroutines
;-------------------------------------------------------------------------------
;-------------------------------------------------------------------------------
; Interrupt Vectors
;-------------------------------------------------------------------------------
ORG 0FFFEh ; MSP430 RESET Vector
DW RESET ; establishes the label RESET as
; the starting point
END ; END of all code for this program
;-------------------------------------------------------------------------------
;-------------------------------------------------------------------------------