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Code Issues Releases Wiki Activity

added Waveshare BWR Mode for the 4.2in Display (#7995)

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Co-authored-by: rrachasak <dev@rachasak.org>
Co-authored-by: clydebarrow <2366188+clydebarrow@users.noreply.github.com>
This commit is contained in:
Rachasak Ragkamnerd
2025-02-12 04:35:07 +07:00
committed by GitHub
parent 14d7931bd6
commit 0401ee9428
4 changed files with 109 additions and 0 deletions
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58
esphome/components/waveshare_epaper/waveshare_epaper.cpp
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@@ -2274,6 +2274,64 @@ void WaveshareEPaper4P2InBV2::dump_config() {
LOG_UPDATE_INTERVAL(this);
}
// ========================================================
// 4.20in Type B With Red colour support (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
// The implementation is an adaptation of WaveshareEPaper4P2InBV2 class
// ========================================================
void WaveshareEPaper4P2InBV2BWR::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 WaveshareEPaper4P2InBV2BWR::display() {
const uint32_t buf_len = this->get_buffer_length_() / 2u;
this->command(0x10); // Send BW data Transmission
delay(2); // Delay to prevent Watchdog error
for (uint32_t i = 0; i < buf_len; ++i) {
this->data(this->buffer_[i]);
}
this->command(0x13); // Send red data Transmission
delay(2); // Delay to prevent Watchdog error
for (uint32_t i = 0; i < buf_len; ++i) {
// Red color need to flip bit from the buffer. Otherwise, red will conqure the screen!
this->data(~this->buffer_[buf_len + i]);
}
// COMMAND DISPLAY REFRESH
this->command(0x12);
this->wait_until_idle_();
// COMMAND POWER OFF
// NOTE: power off < deep sleep
this->command(0x02);
}
int WaveshareEPaper4P2InBV2BWR::get_width_internal() { return 400; }
int WaveshareEPaper4P2InBV2BWR::get_height_internal() { return 300; }
void WaveshareEPaper4P2InBV2BWR::dump_config() {
LOG_DISPLAY("", "Waveshare E-Paper", this);
ESP_LOGCONFIG(TAG, " Model: 4.2in (B V2) BWR-Mode");
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);