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avr-assembly-play
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Managed to display the numbers and fixed a bug in PIN d

This commit is contained in:
lucic71 2020-06-05 23:28:24 +03:00
parent 91cbd23255
commit 09efd45646
2 changed files with 70 additions and 52 deletions
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2
7_segment_display/.gdbinit
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@ -8,4 +8,4 @@ disass
end
# Here you can put a breakpoint to skip some code
b ENCODE
b COMPUTED

120
7_segment_display/segment.s
View File

@ -21,7 +21,8 @@
.equiv DBIT, 20
.equiv RESULT, 21
.equiv TEMP1, 22
.equiv TEMP2, 23
.equiv EOREG, 23
.equiv PINCONFIG, 30
.org 0x0000
@ -65,8 +66,6 @@ COUNTER:
mov r24, r16
call ENCODE
call WAIT
call WAIT
call WAIT
inc r16
@ -77,6 +76,14 @@ COUNTER:
ENCODE:
; Reset PINCONFIG and RESULT registers.
clr PINCONFIG
clr RESULT
out PORTD, PINCONFIG
call WAIT
; Description:
; -----------
;
@ -97,37 +104,39 @@ ENCODE:
; PIN. Other registers will be used to extract the bits from the binary
; number and to perform logic operations.
mov ABIT, r24
andi ABIT, 0x01
mov BBIT, r24
asr BBIT
andi BBIT, 0x01
mov DBIT, r24
andi DBIT, 0x01
mov CBIT, r24
asr CBIT
asr CBIT
andi CBIT, 0x01
mov DBIT, r24
asr DBIT
asr DBIT
asr DBIT
mov BBIT, r24
asr BBIT
asr BBIT
andi BBIT, 0x01
; TEMP2 will be used for eor'ing with register TEMP1 or RESULT
mov ABIT, r24
asr ABIT
asr ABIT
asr ABIT
; EOREG will be used for eor'ing with register TEMP1 or RESULT
; It is equivalent with flipping the bit in TEMP1 or RESULT.
ldi TEMP2, 0x01
ldi EOREG, 0x01
; Compute a. Steps:
;
; 1. Move A in RESULT
; 2. Perform RESULT = RESULT + C
; 3. Compute DB using TEMP1 and perform RESULT = RESULT + BD
; 4. Compute !D!B = !(D + B) using TEMP1 and TEMP2 and perform
; 4. Compute !D!B = !(D + B) using TEMP1 and EOREG and perform
; RESULT = RESULT + !B!D.
; 5. Write RESULT to DIGITAL PIN 0
COMPUTEA:
mov RESULT, ABIT
or RESULT, CBIT
@ -138,25 +147,26 @@ ENCODE:
mov TEMP1, BBIT
or TEMP1, DBIT
eor TEMP1, TEMP2
and RESULT, TEMP1
eor TEMP1, EOREG
or RESULT, TEMP1
out PORTD, RESULT
call WAIT
or PINCONFIG, RESULT
; Compute b. Steps:
;
; 1. Move B in RESULT and invert the bits.
; 2. Compute !C!D using TEMP1 and TEMP2 and perform RESULT = RESULT + !C!D
; 2. Compute !C!D using TEMP1 and EOREG and perform RESULT = RESULT + !C!D
; 3. Compute CD using TEMP1 and perform RESULT = RESULT + CD
; 4. Write RESULT to DIGITAL PIN 1
COMPUTEB:
mov RESULT, BBIT
eor RESULT, TEMP2
eor RESULT, EOREG
mov TEMP1, CBIT
or TEMP1, DBIT
eor TEMP1, TEMP2
eor TEMP1, EOREG
or RESULT, TEMP1
mov TEMP1, CBIT
@ -166,8 +176,7 @@ ENCODE:
clc
rol RESULT
out PORTD, RESULT
call WAIT
or PINCONFIG, RESULT
; Compute c. Steps:
;
@ -176,10 +185,12 @@ ENCODE:
; 3. Perform RESULT = RESULT + D
; 4. Write RESULT to DIGITAL PIN 2
COMPUTEC:
mov RESULT, BBIT
mov TEMP1, CBIT
eor TEMP1, TEMP2
eor TEMP1, EOREG
or RESULT, TEMP1
or RESULT, DBIT
@ -190,8 +201,7 @@ ENCODE:
clc
rol RESULT
out PORTD, RESULT
call WAIT
or PINCONFIG, RESULT
; Compute d. Steps:
;
@ -202,26 +212,28 @@ ENCODE:
; 5. Perform RESULT = RESULT + !BC
; 6. Write RESULT to DIGITAL PIN 3
COMPUTED:
mov RESULT, ABIT
mov TEMP1, BBIT
or TEMP1, DBIT
eor TEMP1, TEMP2
eor TEMP1, EOREG
or RESULT, TEMP1
mov TEMP1, DBIT
eor TEMP1, TEMP2
or TEMP1, CBIT
eor TEMP1, EOREG
and TEMP1, CBIT
or RESULT, TEMP1
mov TEMP1, CBIT
eor TEMP1, TEMP2
eor TEMP1, EOREG
and TEMP1, BBIT
and TEMP1, DBIT
or RESULT, TEMP1
mov TEMP1, BBIT
eor TEMP1, TEMP2
eor TEMP1, EOREG
and TEMP1, CBIT
or RESULT, TEMP1
@ -234,8 +246,7 @@ ENCODE:
clc
rol RESULT
out PORTD, RESULT
call WAIT
or PINCONFIG, RESULT
; Compute e. Steps:
;
@ -243,13 +254,15 @@ ENCODE:
; 2. Compute RESULT = RESULT + !B!D
; 3. Write RESULT to DIGITAL PIN 4
COMPUTEE:
mov RESULT, DBIT
eor RESULT, TEMP2
eor RESULT, EOREG
and RESULT, CBIT
mov TEMP1, BBIT
or TEMP1, DBIT
eor TEMP1, TEMP2
eor TEMP1, EOREG
or RESULT, TEMP1
clc
@ -264,8 +277,7 @@ ENCODE:
clc
rol RESULT
out PORTD, RESULT
call WAIT
or PINCONFIG, RESULT
; Compute f. Steps:
;
@ -275,20 +287,22 @@ ENCODE:
; 4. Compute RESULT = RESULT + B!D
; 5. Write RESULT to DIGITAL PIN 5
COMPUTEF:
mov RESULT, ABIT
mov TEMP1, CBIT
or TEMP1, DBIT
eor TEMP1, TEMP2
eor TEMP1, EOREG
or RESULT, TEMP1
mov TEMP1, CBIT
eor TEMP1, TEMP2
eor TEMP1, EOREG
and TEMP1, BBIT
or RESULT, TEMP1
mov TEMP1, DBIT
eor TEMP1, TEMP2
eor TEMP1, EOREG
and TEMP1, BBIT
or RESULT, TEMP1
@ -307,8 +321,7 @@ ENCODE:
clc
rol RESULT
out PORTD, RESULT
call WAIT
or PINCONFIG, RESULT
; Compute g. Steps:
;
@ -318,17 +331,19 @@ ENCODE:
; 4. Compute RESULT = RESULT + A
; 5. Write RESULT to DIGITAL PIN 6
COMPUTEG:
mov RESULT, CBIT
eor RESULT, TEMP2
eor RESULT, EOREG
and RESULT, BBIT
mov TEMP1, BBIT
eor TEMP1, TEMP2
eor TEMP1, EOREG
and TEMP1, CBIT
or RESULT, TEMP1
mov TEMP1, DBIT
eor TEMP1, TEMP2
eor TEMP1, EOREG
and TEMP1, CBIT
or RESULT, TEMP1
@ -352,8 +367,11 @@ ENCODE:
clc
rol RESULT
out PORTD, RESULT
call WAIT
or PINCONFIG, RESULT
WRITE_RESULT:
out PORTD, PINCONFIG
ret
@ -365,7 +383,7 @@ WAIT:
; Loop 0x400000 times which takes approximately 12 milion cycles which is
; approximately 0.7s.
ldi r17, 0x10
ldi r17, 0x20
ldi r18, 0x00
ldi r19, 0x00