Search found 1298 matches

by deshipu
Fri May 18, 2018 6:56 am
Forum: Drivers for External Components
Topic: Drivers for Waveshare 2.13inch E-Ink display
Replies: 50
Views: 9187

Re: Drivers for Waveshare 2.13inch E-Ink display

Is there a solution to this, the screen blinking 5 or 6 times really is not pretty and to do this every 5 seconds would make it un-usable ! Well, if you look at what the book readers do, you will see the solution that they came up with: keep a counter of the partial updates, and once it reaches a c...
by deshipu
Thu May 17, 2018 4:16 pm
Forum: General Discussion and Questions
Topic: converting png file to bytearray
Replies: 23
Views: 378

Re: converting png file to bytearray

stijn wrote:
Thu May 17, 2018 1:28 pm
But you're right, my mistake, it's not a standard in the sense of 'ISO standard xxx'. Let's just call it 'the widely used BMP file format' then as described here for instance: https://en.wikipedia.org/wiki/BMP_file_format
Which of the 4 different formats described there?
by deshipu
Thu May 17, 2018 12:40 pm
Forum: General Discussion and Questions
Topic: converting png file to bytearray
Replies: 23
Views: 378

Re: converting png file to bytearray

What "standard"? BMP is a huge pile of incompatible formats, there is no standard.
by deshipu
Wed May 16, 2018 12:43 pm
Forum: Drivers for External Components
Topic: Drivers for Waveshare 2.13inch E-Ink display
Replies: 50
Views: 9187

Re: Drivers for Waveshare 2.13inch E-Ink display

Of course the e-ink screens can do partial updates. It involves some work with most display controllers, but it's perfectly doable.
by deshipu
Thu May 10, 2018 7:42 pm
Forum: ESP32 boards
Topic: Issue with SPI Epaper display / Wemos LoLin32 Lite
Replies: 3
Views: 121

Re: Issue with SPI Epaper display / Wemos LoLin32 Lite

It's really hard to give you any advice when all you know is that "you have tried many things".
by deshipu
Fri Apr 27, 2018 10:30 am
Forum: Drivers for External Components
Topic: noobie, failing to make a st7735 to work
Replies: 2
Views: 77

Re: noobie, failing to make a st7735 to work

I'm using those displays a lot, and they work very well.

Can you tell us how you connected the display module exactly?

Also, did you connect the backlight to power? This display won't show anything without a backlight.
by deshipu
Mon Apr 09, 2018 6:50 am
Forum: Development of MicroPython
Topic: [SOLVED]why is there no mp_obj type for small int?
Replies: 11
Views: 324

Re: why is there no mp_obj type for small int?

Because small ints are stuffed directly into the pointers themselves.
by deshipu
Wed Apr 04, 2018 11:40 am
Forum: Drivers for External Components
Topic: Drivers for Waveshare 2.13inch E-Ink display
Replies: 50
Views: 9187

Re: Drivers for Waveshare 2.13inch E-Ink display

The 3-wire SPI is not really noticeably slower than the 4-wire — the toggling of the Data/Command pin can take as much time as sending of that extra bit. The reason why 4-wire SPI is often preferred is that 9-bit SPI is a bit tricky to do and most libraries don't handle it very well.