AVR-Chat

On Thu, Mar 27, 2008 at 4:35 PM, steamphreaque <tjkeller@inetnebr.com> wrote:
> Dave:
>
>  Here is the doc from your code.   I am shocked!  You don't remember
> what you wrote in 1989!??   What, are you getting old or something?
>
> *grin*
>
> Thanks
>
> ;*****************************************************************
> ;HD44780 instruction set
> ;
> ;Instruction Code               Description
> ;
> ;       R R D D D D D D D D
> ;       S W 7 6 5 4 3 2 1 0
> ;Clear  0 0 0 0 0 0 0 0 0 1  Clears display and returns cursor to the
> home position (address 0) 1.64mS
> ;
> ;Home   0 0 0 0 0 0 0 0 1 X  Returns cursor to home position (address 0).
> ;                            Also returns display being shifted the original position.
> ;                            DDRAM contents remains unchanged. 1.64mS
> ;Entry mode set
> ;       0 0 0 0 0 0 0 1 I/D S   Sets cursor move direction (I/D), specifies to
> shift the display (S).
> ;                               These operations are performed during data read/write. 40uS
> ;Display On/Off control
> ;       0 0 0 0 0 0 1 D C B     Sets On/Off of all display (D), cursor On/Off
> (C) and blink of cursor
> ;                               position character (B). 40uS
> ;Cursor/display shift
> ;       0 0 0 0 0 1 S/L R/L X X Sets cursor-move or display-shift (S/C),
> shift direction (R/L).
> ;                               DDRAM contents remains unchanged. 40uS
> ;Function set
> ;       0 0 0 0 1 DL N F X X    Sets interface data length (DL), number of
> display line (N)
> ;                               and character font(F). 40uS
> ;Set CGRAM address
> ;       0 0 0 1 CGRAM address   Sets the CGRAM address.
> ;                               CGRAM data is sent and received after this setting. 40uS
> ;Set DDRAM address
> ;       0 0 1 DDRAM address     Sets the DDRAM address.
> ;                               DDRAM data is sent and received after this setting. 40uS
>                                                                40uS
> ;Read busy-flag and address counter
> ;       0 1 BF DDRAM address    Reads Busy-flag (BF) indicating internal operation
> ;                               is being performed and reads address counter contents. 0uS
> ;Write to CGRAM or DDRAM
> ;       1 0 write data          Writes data to CGRAM or DDRAM. 40uS
> ;Read from CGRAM or DDRAM
> ;       1 1 read data           Reads data from CGRAM or DDRAM. 40uS
> ;
>
>
> ------------------------------------
>
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