febtober2000:
Well I finally got the display to work with PIC18F.
Congratulations! Could you tell a bit more about your implementation? Did you use a driver IC (e.g, epson) or did you drive it directly from the PIC? Perhaps post the schematics?
febtober2000:
Well I finally got the display to work with PIC18F.
Congratulations! Could you tell a bit more about your implementation? Did you use a driver IC (e.g, epson) or did you drive it directly from the PIC? Perhaps post the schematics?
I purchased one of them from http://www.watterott.com/en/27-Inch-E-Paper-Display
I would like to know how to program it. We are at the end of January and there is no source code available yet, so if I sign the NDA and then I develop some code that is only based in datasheet, can I distribute it since it is my own code?
Hi,
I am currently working on the 2.7 inch e-paper display from Embedded Artists, with Arduino and I really don't understand how it works...
I don't understand how the pins works because I can power the screen with many different configuration of the pins... How can it be possible?
And even if i've got everything.. datasheets, source code release without NDA and release After NDA, I can't figure out a way to make it work.
I've been trying to make it work for several weeks...
Could somebody give me some help??
Thank You PLEASE
The NDA situation seems to have changed now.
Much more detailed information about how to drive the display is now available here:
http://repaper.org/doc/cog_driving.html
MrPozor
wow, the linked github repository also contains a library for Arduino.
https://github.com/repaper/gratis/tree/master/Arduino
Oliver
MrPozor:
The NDA situation seems to have changed now.Much more detailed information about how to drive the display is now available here:
http://repaper.org/doc/cog_driving.htmlMrPozor
Many thanks for the info. I am really interested in this and it is good news that in one month the first devices with breakout and cable will be shipped
Hi,
WOW! Looks good!
In his code he has a PIN-Mapping that I could not map to the 14-PIN-Connector on my Display from EA.
I don't want to destroy and try any combination.
Has somebody a mapping-example for me?
Oliver, is the code from github only available on Arduino Leonardo?
I think the code was just tested with the Arduino Leonardo. I have not seen any Leonardo specific code except for the usual "serial wait loop". I guess the code will work with any 5V Arduino Board, but i have not verified this. Just ordered my first e-paper display (EA Modul) today XD
Oliver
Oh ok, thanks.
I have an Arduino UNO and an E-Paper Display from EA (2.7 inch) and i'm trying to make it work with the Pins.
I don't know what FLASH_CS and EPD_CS correspond to.
From what i read so far: The EPD_CS is the chip select signal of the el. paber device. The flash-chip-select is the chip select of the flash memory, which seems to be part of the upcoming EPD extension board. The EA Module does not have a build in flash memory. At least from this perspective, the code from repaper.org needs some modification to make it work with the EA modul.
Oliver
Does it mean that I have to put the flash memory off the code for just an EA module?
Does it mean that I have to put the flash memory off the code for just an EA module?
I guess you have two choices:
Note: I have not even started to analyse any possibilities here. I just had a look at some sections of repaper.org
Oliver
Thank you! I'll try that, but I don't really get how the pins match.
Hi
I started to compare the "EPD extension board" (EPD) with the embedded artists E-Paper Adapter Board (EA)
Here are some of my results (not sure if i am correct, please confirm or correct me)
EPD: 5V, with serial flash, 5V tolerant, analog Temperature value
EA: 3.3V, no serial flash, not 5V tolerant, I2C Temperature sensor
Here is a table of matching pins (at least what i think). Please note, that the polarity might be different for EPD and EA.
EA Pin | EA Name | EPD Pin | EPD Name | Code |
---|---|---|---|---|
1 | GND | 20 | GND | - |
2 | 3.3V | 1 | 5V | - |
3 | SCLK | 7 | SPI CLK | - |
4 | MOSI | 15 | SPI MOSI | - |
5 | MISO | 14 | SPI MISO | - |
6 | SSEL | 19 | /EPD_CS | Pin_EPD_CS |
7 | BUSY | 8 | BUSY | Pin_BUSY |
12 | Reset_Disp | 10 | /RESET | Pin_RESET |
11 | PWM | 9 | PWM | Pin_PWM |
14 | Discharge | 12 | Discharge | Pin_DISCHARGE |
13 | PWR CTRL | 11 | Panel On | Pin_PANEL_ON |
- | - | 13 | Border Control | Pin_BORDER |
9 | I2C SCL | - | - | - |
10 | I2C SDA | - | - | - |
- | - | 6 | Temperature | Pin_TEMPERATURE |
- | - | 18 | /FLASH_CS | Pin_FLASH_CS |
Use this information on your own risk. Perhaps someone can confirm this table...
Oliver
Oh great, thank you very much for your help!!
olikraus:
Hi
I started to compare the "EPD extension board" (EPD) with the embedded artists E-Paper Adapter Board (EA)Here are some of my results (not sure if i am correct, please confirm or correct me)
EPD: 5V, with serial flash, 5V tolerant, analog Temperature value
EA: 3.3V, no serial flash, not 5V tolerant, I2C Temperature sensorHere is a table of matching pins (at least what i think). Please note, that the polarity might be different for EPD and EA.
...
Any luck with the above configuration? If yes, will the EA board work with the supplied example-code of repaper.org?
Thanks
I tried it on my EA device, it doesn't work. I don't really understand why. Maybe it is because of a problem with the wire, that I don't connect properly.
Or maybe it's a problem with the code (or both ^^ ) . But I noticed that the re-paper code, does not use temperature pin to change the display of the screen. And by looking at the data sheet of the 2.7" E paper, I see that to change the display, and input display data, we need to use the temperature sensor.
Maybe the extra pins of the extension board of the re paper code are used to simplify the code and not use the temperature sensor. I don't really know.
I think that the repaper needs to be modified to work on the device. I only tested the code called intro, that is supposed to display some image and some text. Did somebody manage to make this code work without the extension board?
Actually I don't know why the code of Re-paper does not work on my device. I think the code called intro should work, since I think it doesn't use the extra pins of the extension board.
Did anyone tried it on his device?
I wanted to finally power the display, but just ran out of level converters. Well - ordered a couple of 08745 Logic Level Converters and waiting for them (cause the EA-Board is using 3.3V and Arduino Leonardo supplies 5V).
Looking at the code reveals this line:
// configure temperature sensor
S5813A.begin(Pin_TEMPERATURE);
this will redirect to:
void S5813A_Class::begin(int input_pin) {
pinMode(input_pin, INPUT);
analogReference(ANALOG_REFERENCE);
this->temperature_pin = input_pin;
}
As the EA has a I2C temperature sensor we need to play with those lines (remove analogReference).
After that the main loop wants to read the temperature:
int temperature = S5813A.read();
this will trigger:
int S5813A_Class::read() {
return Tstart_C + ((this->readVoltage() - Vstart_uV) / Vslope_uV);
}
Again - as EA is using a I2C sensor we have to play withthe code. I think Arduino uses the Wire.h to communicate over I2C? But then we need the address of the temp sensor on the bus. EA writes "I2C address (0x92/0x93)" on the datasheet.
So we should be able to get the temp by modifying above code to:
Wire.beginTransmission(addr) <- (where addr is defined futher up int addr = 92;)
Wire.send(0);
Wire.endTransmission();
Wire.requestFrom(addr,1);
While(wire.available == 0) ;
int temp = Wire.receive();
return temp;
After reading the temp the code wants to run the setFactor funtion
EPD.setFactor(temperature)
This function is defined in EPD.h. But it looks like 25 is a fixed value here. Well maybe it works like that??
void setFactor(int temperature = 25) {
this->factored_stage_time = this->stage_time * this->temperature_to_factor_10x(temperature) / 10;
}
I still have some questions concerning the code. But unless I have my logic level converters I cannot work on the display. Maybe someone can get that thing to work in the meantime.
Oh – I almost forgot! As the EA doesn’t come with a Flash chip, we'll either have to use the onboard flash, get a SD Shield or leave out the whole flash-code. At least the code is prepared if doesn’t find any flash chip (or a unsupported one):
FLASH.begin(Pin_FLASH_CS, SPI);
if (FLASH.available()) {
Serial.println("FLASH chip detected OK");
} else {
Serial.println("unsupported FLASH chip");
}