Messages in this thread | | | From | Miguel Ojeda <> | Date | Sat, 19 Aug 2023 21:58:19 +0200 | Subject | Re: [PATCH v2] auxdisplay: hd44780: move cursor home after clear display command |
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On Sat, Jul 22, 2023 at 8:09 PM Hugo Villeneuve <hugo@hugovil.com> wrote: > > From: Hugo Villeneuve <hvilleneuve@dimonoff.com> > > The DISPLAY_CLEAR command on the NewHaven NHD-0220DZW-AG5 display > does NOT change the DDRAM address to 00h (home position) like the > standard Hitachi HD44780 controller. As a consequence, the starting > position of the initial string LCD_INIT_TEXT is not guaranteed to be > at 0,0 depending on where the cursor was before the DISPLAY_CLEAR > command. > > Extract of DISPLAY_CLEAR command from datasheets of: > > Hitachi HD44780: > ... It then sets DDRAM address 0 into the address counter... > > NewHaven NHD-0220DZW-AG5 datasheet: > ... This instruction does not change the DDRAM Address > > Move the cursor home after sending DISPLAY_CLEAR command to support > non-standard LCDs. > > Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Applied to `auxdisplay` -- thanks everyone!
Cheers, Miguel
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