Search found 5 matches

by fanhuanji
Fri Nov 15, 2019 12:54 pm
Forum: General Discussion
Topic: RMT based NeoPixels (WS2812B) flickers when WiFi is used
Replies: 19
Views: 5844

Re: RMT based NeoPixels (WS2812B) flickers when WiFi is used

I also had a similar problem while driving SK6812 leds with the RMT interface. Root cause for me was that the dynamic frequency scaling being set from 40MHz to 160MHz while RMT was attended to use 80MHz APB clock. When CPU clock dropped to 40MHz the automatic APB divider could not keep up and RMT r...
by fanhuanji
Mon Mar 05, 2018 2:37 pm
Forum: Showcase
Topic: ESP32 TFT display library
Replies: 66
Views: 66921

Re: ESP32 TFT display library

Dear all: How to display Chinese on the LCD? How to store the Chinese font into flash? Thank you! oh, for the storage, you can refer to "esp-idf\examples\wifi\wpa2_enterprise\main\" in component.mk wpa2_enterprise_main.c, there shows a way to include binary files into the program binary, in that pr...
by fanhuanji
Mon Mar 05, 2018 2:29 pm
Forum: Showcase
Topic: ESP32 TFT display library
Replies: 66
Views: 66921

Re: ESP32 TFT display library

Dear all: How to display Chinese on the LCD? How to store the Chinese font into flash? Thank you! you can treat that Chinese character as a bitmap(1bit/pixel), like this, search HZK16 or “LED 点阵字库” and you may find "https://blog.twofei.com/embedded/hzk.html", wish this may help U. :) 把中文生成点整字库,色深一位...
by fanhuanji
Mon Feb 19, 2018 9:32 am
Forum: Showcase
Topic: ESP32 TFT display library
Replies: 66
Views: 66921

Re: ESP32 TFT display library

I have some plans to update the library to be able to use 3-wire SPI displays, probably early next month. At the moment, it is not possible. thanks, but i really want to know how to do that? is in my former reply i mentioned a ips lcd, that needs me to transfer at least 1'229'760bytes pixel data pe...
by fanhuanji
Tue Feb 13, 2018 7:13 am
Forum: Showcase
Topic: ESP32 TFT display library
Replies: 66
Views: 66921

Re: ESP32 TFT display library

Very well, this library is easy to use, but i'm now tring to drive a 3-wire spi IPS LCD, and it has to use 9-bit spi(it doesn't have D/C line, and i don't want to use DBI Type B Parallel Interface due to that needs to much I/O ports). as there has to be a leading bit to indicate D/C(data or command)...

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