I have been using the normal characters on this display with success. This particular display has 4 segments at the bottom, that would point down if they were selected. However, I can't seem to figure out how to use them.
The display datasheet is at: http://www.newhavendisplay.com/specs/NHD-0108HZ-FSW-GBW.pdf If you look at page 5, it describes the address for the segments at 40H-A1 through 40H-A4. I would think that means the address is 0X40. However, I have no idea what the A1...A4 means. It also mentions that the A1..A4 is somehow associated with COM9 - whatever that is.
I also looked at the driver datasheet: http://www.newhavendisplay.com/app_notes/ST7066U.pdf and had no success, except for the mention of COM9 on page 8, where it tells what COM1 - COM16 is. The explanation is beyond my experience.
I contacted NewHaven's "help", and all they seem to be able to tell me is exactly what's on the datasheet.
If I recall, even if I am using an 8X1, I should be able to say I'm using a 16X1 in the IDE, since the 9th character is at 0X40. So I'm thinking I should be able to use the special segments, but have no idea what to write to the 0X40 address.
Any thoughts or experiences are appreciated....