Difference between revisions of "2.13inch Touch e-Paper HAT"

Revision as of 11:45, 17 March 2021

2.13inch Touch e-Paper HAT

300px

2.13inch Touch E-Paper E-Ink Display HAT For Raspberry Pi, 250×122 Pixels, Black / White, SPI Interface

Specifications

Size: 2.13inch
Outline dimensions(Module): 69.15 × 38.90mm
Outline dimensions(Driver Board): 59.51mm × 34.00mm
Display area: 48.55mm × 23.71mm
Oerrating Voltage: 3.3V
Communication interface: SPI
Dot pitch: 0.194 × 0.194mm
Resolution: 250×122 pixels
Display color: black, white
Grey scale: 2
Partial refresh time: 0.3s
Full refresh time: 2s
Refresh power: 26.4mW(typ.)
Touch points: 5 (MAX)
Touch type: Capacitive touch
Touch interfaced: I2C
Touch panel: Toughened Glass

【Note】

Refresh time: The refresh time is experimental test data, there will have some deviation from the actual refresh time, so please refer to the actual refresh time. The e-paper will flicker during the full refresh process, this is a normal phenomenon.
Power consumption: The power consumption data is experimental test data. The actual power consumption will have a certain deviation due to the existence of the driver board and the actual usage. Please refer to the actual refresh power consumption.

SPI Communication protocol

Note: Different from the traditional SPI protocol, the data line from the slave to the master is hidden since the device only has a display requirement.

CS is slave chip select, when CS is low, the chip is enabled.
DC is data/command control pin, when DC = 0, write command, when DC = 1, write data.
SCLK is the SPI communication clock.
SDIN is the data line from the master to the slave in SPI communication.
Timing: CPHL=0， CPOL=0 （SPI0

Working protocoal

Pixel & Byte

We define the pixels in a monochrome picture, 0 is black and 1 is white.
White：□，Bit 1
Black：■：Bit 0

The dot in the figure is called a pixel. As we know, 1 and 0 are used to define the color, therefore we can use one bit to define the color of one pixel, and 1 byte = 8pixels
For example, If we set first 8 pixels to black and the last 8 pixels to white, we show it by codes, they will be 16 bit as below:

For computer, the data is saved in MSB format:

So we can use two bytes for 16 pixels.

@@ Line 34: / Line 34: @@
 *Touch interfaced: I2C
 *Touch panel: Toughened Glass
+【Note】
+*Refresh time: The refresh time is experimental test data, there will have some deviation from the actual refresh time, so please refer to the actual refresh time. The e-paper will flicker during the full refresh process, this is a normal phenomenon.
+*Power consumption: The power consumption data is experimental test data. The actual power consumption will have a certain deviation due to the existence of the driver board and the actual usage. Please refer to the actual refresh power consumption.
+===SPI Communication protocol===
+[[File:1.54inch-e-paper-manual-1.png|400px]]
+Note: Different from the traditional SPI protocol, the data line from the slave to the master is hidden since the device only has a display requirement.
+* CS is slave chip select, when CS is low, the chip is enabled.
+* DC is data/command control pin, when DC = 0, write command, when DC = 1, write data.
+* SCLK is the SPI communication clock.
+* SDIN is the data line from the master to the slave in SPI communication.
+* Timing: CPHL=0， CPOL=0 （SPI0
+==Working protocoal==
+===Pixel & Byte===
+We define the pixels in a monochrome picture, 0 is black and 1 is white.<br />
+White：□，Bit 1<br />
+Black：■：Bit 0<br />
+*The dot in the figure is called a pixel. As we know, 1 and 0 are used to define the color, therefore we can use one bit to define the color of one pixel, and 1 byte = 8pixels<br />
+*For example, If we set first 8 pixels to black and the last 8 pixels to white, we show it by codes, they will be 16 bit as below:<br />
+[[file:e-paper_hardware_work_1.png]]<br />
+For computer, the data is saved in MSB format:<br />
+[[file:e-paper_hardware_work_2.png]]<br />
+So we can use two bytes for 16 pixels.<br />

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