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Diffstat (limited to 'demo/LCD.asm')
| -rw-r--r-- | demo/LCD.asm | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/demo/LCD.asm b/demo/LCD.asm new file mode 100644 index 0000000..9a1909f --- /dev/null +++ b/demo/LCD.asm @@ -0,0 +1,52 @@ +; Very basic demonstration example for HD44780 simulator +; * Click on "Virtual HW" in the main menu, +; * choose "Open", +; * change filter to VH Component, +; * open "LCD.vhc", +; * press F2, +; * press F6, +; * enjoy ... :-) +; * press F2 to end. +; +; Note: simulated delays are skipped in this example. +; + org 0 + jmp start + +RS bit P3.0 +RW bit P3.1 +E bit P3.2 +D equ P1 + +cmd macro cmd_code + setb E + mov D, cmd_code + clr E +endm + +string: db 'Welcome to MCU 8051 IDE!\0' + +start: mov D, #0 + clr RW + mov DPTR, #string + +main: clr RS + cmd #00000001b ; Clear display + cmd #00000010b ; Cursor home + cmd #00000110b ; Entry mode set + cmd #00001111b ; Display ON/OFF control + cmd #00011110b ; Cursor/display shift + cmd #00111100b ; Function set + cmd #10000001b ; Set DDRAM address + + ; Print the string ... + setb RS + mov R0, #0 +print: mov A, R0 + inc R0 + movc A, @A+DPTR + cmd A + cjne A, #0, print + sjmp main + + end |