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| "Column" confusion on T6963 based LCD http://forum.lcdinfo.com/viewtopic.php?f=6&t=2159 |
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| Author: | jmarkwolf [ Mon Feb 19, 2007 15:55 ] |
| Post subject: | "Column" confusion on T6963 based LCD |
I'm using a T6963 based LCD (Optrex DMF5001) and it is working nicely except for my uploaded bitmaps. They appear properly when I select a 8x8 font width (jumpers J8 & J9), but are crammed to the left side of the screen when I select a 6x8 font. There are two other jumpers relating to "columns", jumpers J6 & J7, but I've checked two different vintage OPTREX datasheets and neither is more informative than the other. For the DMF5001, jumpers J6 & J7 apparently apparently allow selection between 32, 40, 64, and 80 columns. How can this be on a 160 pixel wide LCD? Does this possibly have something to do with my bitmap problem. I'm reluctant to carve the copper foil jumpers on my LCD before I undestand the options. Can anyone please advise? |
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| Author: | Henri [ Fri Feb 23, 2007 12:06 ] |
| Post subject: | |
First I want to say that it has been some time since I have been writing low level drivers for T6963C controller so I might not remember every detail. But with T6963C the width of one column is the width selected with font select. So 8 pixel wide font with 32 columns is 8*32 = 256 pixels max 6*32 = 192 so with 240 pixel wide display and font select set to 6 the columns setting needs to be at least 40 (6*40=240) But with your 160 pixel wide display you can use any column setting. I think the T6963C had some kind scrolling support so here the larger column settings would be useful so you can have a larger frame buffer in which you can then scroll the area seen on the display. In fact I just realized that I have worked with DMF5001 in the past. I remember this 160 pixel width caused some troubles but unfortunately I don't remember the details anymore. Maybe you could try searching this forum for any hits for this display type in case these are discussed already. There might also be example code with working intialization settings in this forum for this display. |
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