AD-501-B 16x32 display scanning issues
T&E Engineer
Posts: 1,396
I have a previous post with some background (datasheets, etc.) to my setup.
http://forums.parallax.com/showthread.php?p=653962
This display is unique in that the 16 rows (up/down) are directly tied to the 2 sets of 16 columns (left/right). See AD-501-B.jpg (attachment).
So far I can enter in WDATA statements to control what is on the 2 sets of·16 columns and then directly scan from top to bottom (16 rows) the WDATA in.
Since the rows are dependent on the columns (e.g. CLOCK, /LATCH and /STROBE signals tied together for the rows & collumns), I can't figure out how to use an interrupt (or other method) to scan in the·rows fast enough and correctly. It is a combination of setting HIGH's and LOWs on the /Latch, /Strobe, SIN1, SIN2, SIN3 and the CLOCK.
Can someone offer some insight to how this might be done?
BTW: I don't have any problem with brightness as the LC7932M LED drivers that this AD-501-B module uses. Very nice and bright but have to use a separate 5vdc 20A power supply (draws ~2 A) for the AD-501-B module.
It has been difficult figuring this out since the datasheet is in THAI.
Any Help would be appreciated!
Thank you.
Post Edited (T&E Engineer) : 7/1/2007 12:22:43 PM GMT
http://forums.parallax.com/showthread.php?p=653962
This display is unique in that the 16 rows (up/down) are directly tied to the 2 sets of 16 columns (left/right). See AD-501-B.jpg (attachment).
So far I can enter in WDATA statements to control what is on the 2 sets of·16 columns and then directly scan from top to bottom (16 rows) the WDATA in.
Since the rows are dependent on the columns (e.g. CLOCK, /LATCH and /STROBE signals tied together for the rows & collumns), I can't figure out how to use an interrupt (or other method) to scan in the·rows fast enough and correctly. It is a combination of setting HIGH's and LOWs on the /Latch, /Strobe, SIN1, SIN2, SIN3 and the CLOCK.
Can someone offer some insight to how this might be done?
BTW: I don't have any problem with brightness as the LC7932M LED drivers that this AD-501-B module uses. Very nice and bright but have to use a separate 5vdc 20A power supply (draws ~2 A) for the AD-501-B module.
It has been difficult figuring this out since the datasheet is in THAI.
Any Help would be appreciated!
Thank you.
Post Edited (T&E Engineer) : 7/1/2007 12:22:43 PM GMT
