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waveshare(ssd1680): Add driver for waveshare 2.9 inch v2 epaper

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- Waveshare 2.9in v2 epaper uses a different IC (SSD1680) than the v1. This commit
takes the code from v1 and modifies them for v2.
- Datasheets:
    - https://files.waveshare.com/upload/7/79/2.9inch-e-paper-v2-specification.pdf
    - https://cdn-learn.adafruit.com/assets/assets/000/097/631/original/SSD1680_Datasheet.pdf?1607625960
- Code reference: https://github.com/waveshareteam/e-Paper/raw/refs/heads/master/RaspberryPi_JetsonNano/c/lib/e-Paper/EPD_2in9_V2.c
- Fixes #627

Signed-off-by: Avinal Kumar <avinal.xlvii@gmail.com>
Assisted-by: Claude Code
This commit is contained in:
Avinal Kumar
2026-03-29 19:02:13 +05:30
committed by Ron Evans
parent 4071028e85
commit e232a4f136
4 changed files with 653 additions and 0 deletions
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waveshare-epd/epd2in9v2/registers.go
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package epd2in9v2
// Commands from SSD1680 datasheet
const (
EPD_WIDTH = 128
EPD_HEIGHT = 296
DRIVER_OUTPUT_CONTROL = 0x01
GATE_DRIVING_VOLTAGE = 0x03
SOURCE_DRIVING_VOLTAGE = 0x04
DEEP_SLEEP_MODE = 0x10
DATA_ENTRY_MODE = 0x11
SW_RESET = 0x12
MASTER_ACTIVATION = 0x20
DISPLAY_UPDATE_CONTROL_1 = 0x21
DISPLAY_UPDATE_CONTROL_2 = 0x22
WRITE_RAM_BW = 0x24
WRITE_RAM_RED = 0x26
VCOM_SENSE = 0x28
VCOM_SENSE_DURATION = 0x29
PROGRAM_VCOM_OTP = 0x2A
WRITE_VCOM_CONTROL = 0x2B
WRITE_VCOM_REGISTER = 0x2C
OTP_READ_DISPLAY_OPTION = 0x2D
USER_ID_READ = 0x2E
PROGRAM_WS_OTP = 0x30
LOAD_WS_OTP = 0x31
WRITE_LUT_REGISTER = 0x32
PROGRAM_OTP_SELECTION = 0x36
OTP_SELECTION_CONTROL = 0x37
WRITE_USER_ID = 0x38
OTP_PROGRAM_MODE = 0x39
BORDER_WAVEFORM_CONTROL = 0x3C
END_OPTION = 0x3F
SET_RAM_X_ADDRESS = 0x44
SET_RAM_Y_ADDRESS = 0x45
SET_RAM_X_COUNTER = 0x4E
SET_RAM_Y_COUNTER = 0x4F
SET_ANALOG_BLOCK_CONTROL = 0x74
SET_DIGITAL_BLOCK_CONTROL = 0x7E
NO_ROTATION Rotation = 0
ROTATION_90 Rotation = 1
ROTATION_180 Rotation = 2
ROTATION_270 Rotation = 3
SPEED_DEFAULT Speed = 0
SPEED_FAST Speed = 1
SPEED_PARTIAL Speed = 2
)