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Byte order incorrect for UC1701, PCD8544 and SSD1306 controllers. #3

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mp035 opened this issue Dec 18, 2019 · 0 comments
Open

Byte order incorrect for UC1701, PCD8544 and SSD1306 controllers. #3

mp035 opened this issue Dec 18, 2019 · 0 comments

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@mp035
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mp035 commented Dec 18, 2019

Hi, Great job on this tool. Thank you for providing it. Unfortunately the byte order is incorrect for every graphic LCD I have ever used. I got the correct byte order by changing line 99 in app.js to the following:
buffer[ (y % 8) + (Math.floor(y / 8) * 8 * width) + (x * 8) ] = temp
and using column major.

This mapping is used on UC1701, PCD8544 (nokia 3310) and SSD1306.
XYandZ added a commit to XYandZ/dotmatrixtool that referenced this issue Oct 12, 2022
@XYandZ
Change byte order.
354d605 
Change byte order to work with UC1701, PCD8544 (Nokia 3310) and SSD1306 displays.

Implement changed from stefangordon#3
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@mp035