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Add B/W support for Waveshare 2.90in (B) screen (#889)

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* Add B/W support for Waveshare 2.90in (B) screen

* Fix for() loop source code formatting
This commit is contained in:
Andrej Komelj 2019-12-03 14:18:05 +01:00 committed by Otto Winter
parent fa1adfd934
commit 6433da13a3
3 changed files with 101 additions and 0 deletions
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2
esphome/components/waveshare_epaper/display.py
View file

@ -12,6 +12,7 @@ WaveshareEPaper = waveshare_epaper_ns.class_('WaveshareEPaper', cg.PollingCompon
display.DisplayBuffer)
WaveshareEPaperTypeA = waveshare_epaper_ns.class_('WaveshareEPaperTypeA', WaveshareEPaper)
WaveshareEPaper2P7In = waveshare_epaper_ns.class_('WaveshareEPaper2P7In', WaveshareEPaper)
WaveshareEPaper2P9InB = waveshare_epaper_ns.class_('WaveshareEPaper2P9InB', WaveshareEPaper)
WaveshareEPaper4P2In = waveshare_epaper_ns.class_('WaveshareEPaper4P2In', WaveshareEPaper)
WaveshareEPaper7P5In = waveshare_epaper_ns.class_('WaveshareEPaper7P5In', WaveshareEPaper)
@ -24,6 +25,7 @@ MODELS = {
'2.13in-ttgo': ('a', WaveshareEPaperTypeAModel.TTGO_EPAPER_2_13_IN),
'2.90in': ('a', WaveshareEPaperTypeAModel.WAVESHARE_EPAPER_2_9_IN),
'2.70in': ('b', WaveshareEPaper2P7In),
'2.90in-b': ('b', WaveshareEPaper2P9InB),
'4.20in': ('b', WaveshareEPaper4P2In),
'7.50in': ('b', WaveshareEPaper7P5In),
}

79
esphome/components/waveshare_epaper/waveshare_epaper.cpp
View file

@ -423,6 +423,85 @@ void WaveshareEPaper2P7In::dump_config() {
LOG_UPDATE_INTERVAL(this);
}
// ========================================================
// 2.90in Type B (LUT from OTP)
// Datasheet:
// - https://www.waveshare.com/w/upload/b/bb/2.9inch-e-paper-b-specification.pdf
// - https://github.com/soonuse/epd-library-arduino/blob/master/2.9inch_e-paper_b/epd2in9b/epd2in9b.cpp
// ========================================================
void WaveshareEPaper2P9InB::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 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_();
// 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(0x9F);
// COMMAND RESOLUTION SETTING
// set to 128x296 by COMMAND PANNEL SETTING
// COMMAND VCOM AND DATA INTERVAL SETTING
// use defaults for white border and ESPHome image polarity
// EPD hardware init end
}
void HOT WaveshareEPaper2P9InB::display() {
// COMMAND DATA START TRANSMISSION 1 (B/W data)
this->command(0x10);
delay(2);
this->start_data_();
this->write_array(this->buffer_, this->get_buffer_length_());
this->end_data_();
delay(2);
// COMMAND DATA START TRANSMISSION 2 (RED data)
this->command(0x13);
delay(2);
this->start_data_();
for (int i = 0; i < this->get_buffer_length_(); i++)
this->write_byte(0x00);
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 WaveshareEPaper2P9InB::get_width_internal() { return 128; }
int WaveshareEPaper2P9InB::get_height_internal() { return 296; }
void WaveshareEPaper2P9InB::dump_config() {
LOG_DISPLAY("", "Waveshare E-Paper", this);
ESP_LOGCONFIG(TAG, " Model: 2.9in (B)");
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,

20
esphome/components/waveshare_epaper/waveshare_epaper.h
View file

@ -126,6 +126,26 @@ class WaveshareEPaper2P7In : public WaveshareEPaper {
int get_height_internal() override;
};
class WaveshareEPaper2P9InB : public WaveshareEPaper {
public:
void initialize() override;
void display() override;
void dump_config() override;
void deep_sleep() override {
// COMMAND DEEP SLEEP
this->command(0x07);
this->data(0xA5); // check byte
}
protected:
int get_width_internal() override;
int get_height_internal() override;
};
class WaveshareEPaper4P2In : public WaveshareEPaper {
public:
void initialize() override;