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added a counting example

Arthur Paulino 2018-01-05 20:32:13 -03:00
parent 7664174f14
commit a81927344c
1 changed files with 20 additions and 1 deletions
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21
Learn-by-Examples.md

@ -48,9 +48,28 @@ HOLO_DISPLAY_COLOR EQU 4
MOV A, HOLO_DISPLAY_COLOR ; MOV the constant HOLO_DISPLAY_COLOR into register A MOV A, HOLO_DISPLAY_COLOR ; MOV the constant HOLO_DISPLAY_COLOR into register A
MOV B, 0x00FF ; MOV the (immediate) value 0x00FF into register B MOV B, 0x00FF ; MOV the (immediate) value 0x00FF into register B
MOV C, 0x0000 ; clear register C: no green and no blue MOV C, 0x0000 ; clear register C: no green and no blue
HWI HWID_HOLO ; this interrupt will set the color to: #0000FF [C:B] also know as red HWI HWID_HOLO ; this interrupt will set the color to: #FF0000 [B:C] also know as red
MOV A, HOLO_DISPLAY_DEC ; MOV the constant HOLO_DISPLAY_DEC into register A MOV A, HOLO_DISPLAY_DEC ; MOV the constant HOLO_DISPLAY_DEC into register A
MOV B, [DISPLAYED_DECIMAL] ; MOV the value that DISPLAYED_DECIMAL is pointing at into register B MOV B, [DISPLAYED_DECIMAL] ; MOV the value that DISPLAYED_DECIMAL is pointing at into register B
HWI HWID_HOLO ; ... HWI HWID_HOLO ; ...
BRK ; halt execution until next tick BRK ; halt execution until next tick
``` ```
```assembly
; Count from 42 in red
HWID_HOLO EQU 0x9 ; setup constants
HOLO_DISPLAY_DEC EQU 3
HOLO_DISPLAY_COLOR EQU 4
.data
DISPLAYED_DECIMAL: DW 42 ; create a word in memory called DISPLAYED_DECIMAL and set its value
; to 42
.text
MOV A, HOLO_DISPLAY_COLOR ; MOV the constant HOLO_DISPLAY_COLOR into register A
MOV B, 0x00FF ; MOV the (immediate) value 0x00FF into register B
MOV C, 0x0000 ; clear register C: no green and no blue
HWI HWID_HOLO ; this interrupt will set the color to: #FF0000 [B:C] also know as red
MOV A, HOLO_DISPLAY_DEC ; MOV the constant HOLO_DISPLAY_DEC into register A
MOV B, [DISPLAYED_DECIMAL] ; MOV the value that DISPLAYED_DECIMAL is pointing at into register B
HWI HWID_HOLO ; ...
ADD [DISPLAYED_DECIMAL], 1 ; adds 1 to the value pointed by DISPLAYED_DECIMAL
BRK ; halt execution until next tick
```