eink-pricetags Solum TG-GR22

I've collected some information about Solum TG-GR22 price tags, would that info be welcome here? It's a totally different ARM-based SoC (TI CC2630) so any development of custom firmware probably wouldn't be cross-compatible. Maybe some sort of wiki would be a better place to collect these things?

Feb 26 '23 04:02 DeltaF1

Maybe the usage of cc2640 is the same as CC2630, https://github.com/muyuchl/cc2640BleEpd

Jun 12 '23 11:06 alanfans

Nice find, thank you! That looks like it could be a good base to work off of. I wonder if the EPD pins are the same on my board, it's been hard to trace them

Jun 12 '23 17:06 DeltaF1

@DeltaF1 Hey Delta, any update on this? Are cc2640 and cc2630 pins the same? I'm curious to know as well. Thanks!

Sep 29 '23 15:09 loonglade

Sorry I haven't worked on price tag stuff in a while. The picture here https://github.com/muyuchl/cc2640BleEpd/issues/2 shows a similar layout on the e-ink side to the board I have, but the MCU is in a different location and rotated 45 degrees so it's hard to tell if it's the same pins being routed to the e-ink interface. I have some notes from when I was looking into this but I can't find my guesses about which specific pin numbers are for the e-ink SPI. Looking at the placement of the cc2630 MCU on my boards (TG-GR22) and looking at the package pinouts in the datasheet I would guess that pins DIO_8-DIO_15 are involved since those are all right next to the e-ink interface. DIO_12 is broken out onto the test pads and is the pin configured to enable the bootloader when held down to ground, but it could also be in use for the interface after boot time.

Sep 29 '23 20:09 DeltaF1