2.9" Chroma 29
- TI CC1110 - 26Mhz 8051 32kB Flash / 4kB RAM
- 2.6 x 1.10 in ePaper display (BWR or BWY) 296x128px
- 128Kbyte SPI flash
- 2 x CR2450 button cell
- SubGhz (868 Mhz / 915 Mhz) Radio
- FCC ID: VC7120-0112
A beta version of OpenEPaper firmware for edk286 Issue 8 and 9 boards is available.
The firmware images are available here.
It is possible that the beta will work with versions not listed in the chart below, if you test the beta on another board issue please report your finding if it works or not.
Other versions of the Chroma29 MAY be supported in the future.
The were several versions of the Chroma29 which are/were manufactured, unfortunately they are not all compatible.
If you have version of the Chroma29 not listed before we PLEASE add details you can provide in the following table.
| Supported | SN Format | Board Rev | Controller | EPD Panel | Notes |
|---|---|---|---|---|---|
| N | ? | unknown | similar to UC8151C | Rev used by Dmitry's original firmware | |
| Y | JA0xxxxxxxB | edk286 Issue 8 220-0067-08 2014 |
similar to UC8154 | WF0290T1PBZ01 | Display is always enabled (nEnable is ignored) |
| Y | JA0xxxxxxxB or JA1xxxxxxxB |
edk286 Issue 9 220-0067-09 2015 |
similar to UC8154 | WF0290T1PBZ01 | 1. EPD pin 4&5 (VGL,VGH) are n/c 2. Q2 & Q3 added for nEnable |
| N | JFxxxxxxxxB |
edk286 Issue 12 220-0067-12 2015 |
? |
WF0290T1DBZ010E42 cable |
Note: Some Issue 9 tags also start with JF these may be BWY rather than BWR models. |
| N | ? |
edk296 Issue 1 220-0094-01 2018 |
? | WFD0290BF33 | |
| N | MExxxxxxxxC |
edk505 Issue4 220-0095-004 2019 |
? | DEPG0290RWU51011HPB1E | Processor is a CC1310 FCC ID: VC7120-0200 |
Known EPD controllers are either similar to the UC8151 or the UC8154 depending on version.
The SPI flash chip is the 128k byte MX25V1006E.
The flash is organized as 32 4k sectors or 2 65k blocks. Sectors, blocks, or the entire chip can be erased at a time.
| Test point | Signal | CC debugger pin |
|---|---|---|
| TP8 | J3, GND | 1 |
| TP5 | DC | 3 |
| TP4 | J2, +VBAT | 2 (and 9 to power board from debugger) |
| TP3 | DD | 4 |
| TP2 | Reset_n | 7 |
Connecting a serial port to the Chroma is very handy for development but it is not needed if you just want to flash custom firmware.
| Test point | Signal | FTDI |
|---|---|---|
| J3 | GND | Black |
| TP7 | Serial out | Yellow |
| TP9 | Serial in | Orange |
| Test point | Signal |
|---|---|
| TP2 | Reset_n |
| TP3 | DD |
| TP4 | J2, +VBAT |
| TP5 | DC |
| TP6 | P0_1 |
| TP7 | P1.6 (Serial out) |
| TP8 | J3, GND |
| TP9 | P1_7 (Serial in) |
| TP10 | J1.23 PREVGL ? |
| TP11 | J1.21 PREVGH ? |
The following tables were captured from the EPD SPI bus while sending an image using atc1441's Custom PriceTag Access Point to a tag running stock firmware.
| Table | Values |
|---|---|
| Vcom1 LUT (Cmd 0x20) |
0x01 0x01 0x01 0x03 0x04 0x09 0x06 0x06 0x0A 0x04 0x04 0x19 0x03 0x04 0x09 |
| White LUT (Cmd 0x21) |
0x01 0x01 0x01 0x03 0x84 0x09 0x86 0x46 0x0A 0x84 0x44 0x19 0x03 0x44 0x09 |
| Black LUT (Cmd 0x22) |
0x01 0x01 0x01 0x43 0x04 0x09 0x86 0x46 0x0A 0x84 0x44 0x19 0x83 0x04 0x09 |
| Gray1 LUT (Cmd 0x23) |
|
| Gray2 LUT (Cmd 0x24) |
|
| Vcom2 LUT (Cmd 0x25) |
0x0A 0x0A 0x01 0x02 0x14 0x0D 0x14 0x14 0x01 0x00 0x00 0x00 0x00 0x00 0x00 |
| Red0 LUT (Cmd 0x26) |
0x4A 0x4A 0x01 0x82 0x54 0x0D 0x54 0x54 0x01 0x00 0x00 0x00 0x00 0x00 0x00 |
| Red1 LUT (Cmd 0x27) |
0x0A 0x0A 0x01 0x02 0x14 0x0D 0x14 0x14 0x01 0x00 0x00 0x00 0x00 0x00 0x00 |