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Diffstat (limited to 'demo/demo1.asm')
| -rw-r--r-- | demo/demo1.asm | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/demo/demo1.asm b/demo/demo1.asm new file mode 100644 index 0000000..3ba82dd --- /dev/null +++ b/demo/demo1.asm @@ -0,0 +1,63 @@ +; MCU 8051 IDE - Demostration code +; Macro instructions, conditional compilation and constants +; Try tab "Graph" on bottom panel + +; Press F2 and F6 to run the program (start simulator and animate) + +$TITLE('DEMO 2') ; Set title for code listing +$DATE(36/-4/1907) ; Set date for code listing + +; Constant definitions +; -------------------- +counter idata 00Fh ; Counter of Px shifts +x set 100 ; Some variable +inc_dec equ 100 / X ; Flag: Increment/Decrement counter + + cseg at 1FFh ; Code segment starts at 0x1FF +something: db 4d ; Reserve 4 bytes in this segment + +; Macro instructions +; -------------------- + +;; Shift the given registeres +shift macro reg0, reg1 + + ; Increment / Decrement counter + mov A, counter + if inc_dec <> 0 + inc A + else + dec A + endif + $nolist ; <- Disable code listing + mov counter, A + $list ; <- Enable code listing + + ; Shift + mov reg1, reg0 + mov reg0, reg1 + setb C + mov A, reg0 + rl A + mov reg0, A +endm + +; Program initilization +; -------------------- + org 0h + sjmp start + +; Program start +; -------------------- +start: mov P1, #00Fh + mov P3, #01Eh + sjmp main + +; Main loop +; -------------------- +main: shift P1, P3 + sjmp main + +; Program end +; -------------------- + end |