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B/W support for GooDisplay GDEY029T94 (as used on Adafruit MagTag) (#4222)

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* B/W support for GooDisplay GDEY029T94

* Fix python style ci

* linter recommendations

---------

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
This commit is contained in:
Aaron S. Jackson
2023-03-20 03:45:50 +00:00
committed by GitHub
parent 14e38f0469
commit d98d6ff45f
3 changed files with 106 additions and 0 deletions
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84
esphome/components/waveshare_epaper/waveshare_epaper.cpp
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@@ -663,6 +663,90 @@ void WaveshareEPaper2P9InB::dump_config() {
LOG_UPDATE_INTERVAL(this);
}
// ========================================================
// Good Display 2.9in black/white/grey
// Datasheet:
// - https://v4.cecdn.yun300.cn/100001_1909185148/SSD1680.pdf
// - https://github.com/adafruit/Adafruit_EPD/blob/master/src/panels/ThinkInk_290_Grayscale4_T5.h
// ========================================================
void GDEY029T94::initialize() {
// from https://www.waveshare.com/w/upload/b/bb/2.9inch-e-paper-b-specification.pdf, page 37
// EPD hardware init start
this->reset_();
// COMMAND POWER SETTINGS
this->command(0x00);
this->data(0x03);
this->data(0x00);
this->data(0x2b);
this->data(0x2b);
this->data(0x03); /* for b/w */
// COMMAND BOOSTER SOFT START
this->command(0x06);
this->data(0x17);
this->data(0x17);
this->data(0x17);
// COMMAND POWER ON
this->command(0x04);
this->wait_until_idle_();
// Not sure what this does but it's in the Adafruit EPD library
this->command(0xFF);
this->wait_until_idle_();
// COMMAND PANEL SETTING
this->command(0x00);
// 128x296 resolution: 10
// LUT from OTP: 0
// B/W mode (doesn't work): 1
// scan-up: 1
// shift-right: 1
// booster ON: 1
// no soft reset: 1
this->data(0b10011111);
// COMMAND RESOLUTION SETTING
// set to 128x296 by COMMAND PANEL SETTING
// COMMAND VCOM AND DATA INTERVAL SETTING
// use defaults for white border and ESPHome image polarity
// EPD hardware init end
}
void HOT GDEY029T94::display() {
// COMMAND DATA START TRANSMISSION 2 (B/W only)
this->command(0x13);
delay(2);
this->start_data_();
for (size_t i = 0; i < this->get_buffer_length_(); i++) {
this->write_byte(this->buffer_[i]);
}
this->end_data_();
delay(2);
// COMMAND DISPLAY REFRESH
this->command(0x12);
delay(2);
this->wait_until_idle_();
// COMMAND POWER OFF
// NOTE: power off < deep sleep
this->command(0x02);
}
int GDEY029T94::get_width_internal() { return 128; }
int GDEY029T94::get_height_internal() { return 296; }
void GDEY029T94::dump_config() {
LOG_DISPLAY("", "Waveshare E-Paper (Good Display)", this);
ESP_LOGCONFIG(TAG, " Model: 2.9in Greyscale GDEY029T94");
LOG_PIN(" Reset Pin: ", this->reset_pin_);
LOG_PIN(" DC Pin: ", this->dc_pin_);
LOG_PIN(" Busy Pin: ", this->busy_pin_);
LOG_UPDATE_INTERVAL(this);
}
static const uint8_t LUT_VCOM_DC_4_2[] = {
0x00, 0x17, 0x00, 0x00, 0x00, 0x02, 0x00, 0x17, 0x17, 0x00, 0x00, 0x02, 0x00, 0x0A, 0x01,
0x00, 0x00, 0x01, 0x00, 0x0E, 0x0E, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,