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Add support for Waveshare E-Paper 4.2" B V2 (#1610)

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Co-authored-by: Otto winter <otto@otto-winter.com>
This commit is contained in:
Brett Profitt 2021-08-03 10:41:53 -04:00 committed by GitHub
parent 6516c64e67
commit 160429eb24
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 89 additions and 0 deletions
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4
esphome/components/waveshare_epaper/display.py
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@ -31,6 +31,9 @@ WaveshareEPaper2P9InB = waveshare_epaper_ns.class_(
WaveshareEPaper4P2In = waveshare_epaper_ns.class_(
"WaveshareEPaper4P2In", WaveshareEPaper
)
WaveshareEPaper4P2InBV2 = waveshare_epaper_ns.class_(
"WaveshareEPaper4P2InBV2", WaveshareEPaper
)
WaveshareEPaper5P8In = waveshare_epaper_ns.class_(
"WaveshareEPaper5P8In", WaveshareEPaper
)
@ -56,6 +59,7 @@ MODELS = {
"2.70in": ("b", WaveshareEPaper2P7In),
"2.90in-b": ("b", WaveshareEPaper2P9InB),
"4.20in": ("b", WaveshareEPaper4P2In),
"4.20in-bv2": ("b", WaveshareEPaper4P2InBV2),
"5.83in": ("b", WaveshareEPaper5P8In),
"7.50in": ("b", WaveshareEPaper7P5In),
"7.50inv2": ("b", WaveshareEPaper7P5InV2),

56
esphome/components/waveshare_epaper/waveshare_epaper.cpp
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@ -765,6 +765,62 @@ void WaveshareEPaper4P2In::dump_config() {
LOG_UPDATE_INTERVAL(this);
}
// ========================================================
// 4.20in Type B (LUT from OTP)
// Datasheet:
// - https://www.waveshare.com/w/upload/2/20/4.2inch-e-paper-module-user-manual-en.pdf
// - https://github.com/waveshare/e-Paper/blob/master/RaspberryPi_JetsonNano/c/lib/e-Paper/EPD_4in2b_V2.c
// ========================================================
void WaveshareEPaper4P2InBV2::initialize() {
// these exact timings are required for a proper reset/init
this->reset_pin_->digital_write(false);
delay(2);
this->reset_pin_->digital_write(true);
delay(200); // NOLINT
// COMMAND POWER ON
this->command(0x04);
this->wait_until_idle_();
// COMMAND PANEL SETTING
this->command(0x00);
this->data(0x0f); // LUT from OTP
}
void HOT WaveshareEPaper4P2InBV2::display() {
// COMMAND DATA START TRANSMISSION 1 (B/W data)
this->command(0x10);
this->start_data_();
this->write_array(this->buffer_, this->get_buffer_length_());
this->end_data_();
// COMMAND DATA START TRANSMISSION 2 (RED data)
this->command(0x13);
this->start_data_();
for (int i = 0; i < this->get_buffer_length_(); i++)
this->write_byte(0xFF);
this->end_data_();
delay(2);
// COMMAND DISPLAY REFRESH
this->command(0x12);
this->wait_until_idle_();
// COMMAND POWER OFF
// NOTE: power off < deep sleep
this->command(0x02);
}
int WaveshareEPaper4P2InBV2::get_width_internal() { return 400; }
int WaveshareEPaper4P2InBV2::get_height_internal() { return 300; }
void WaveshareEPaper4P2InBV2::dump_config() {
LOG_DISPLAY("", "Waveshare E-Paper", this);
ESP_LOGCONFIG(TAG, " Model: 4.2in (B V2)");
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);
}
void WaveshareEPaper5P8In::initialize() {
// COMMAND POWER SETTING
this->command(0x01);

29
esphome/components/waveshare_epaper/waveshare_epaper.h
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@ -115,6 +115,7 @@ class WaveshareEPaperTypeA : public WaveshareEPaper {
enum WaveshareEPaperTypeBModel {
WAVESHARE_EPAPER_2_7_IN = 0,
WAVESHARE_EPAPER_4_2_IN,
WAVESHARE_EPAPER_4_2_IN_B_V2,
WAVESHARE_EPAPER_7_5_IN,
WAVESHARE_EPAPER_7_5_INV2,
};
@ -202,6 +203,34 @@ class WaveshareEPaper4P2In : public WaveshareEPaper {
int get_height_internal() override;
};
class WaveshareEPaper4P2InBV2 : public WaveshareEPaper {
public:
void initialize() override;
void display() override;
void dump_config() override;
void deep_sleep() override {
// COMMAND VCOM AND DATA INTERVAL SETTING
this->command(0x50);
this->data(0xF7); // border floating
// COMMAND POWER OFF
this->command(0x02);
this->wait_until_idle_();
// COMMAND DEEP SLEEP
this->command(0x07);
this->data(0xA5); // check code
}
protected:
int get_width_internal() override;
int get_height_internal() override;
};
class WaveshareEPaper5P8In : public WaveshareEPaper {
public:
void initialize() override;