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Fix cut-off on 2.13" waveshare/ttgo epaper displays (#4255)

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The controller of the 2.13" waveshare/ttgo epaper displays operates with a 128x250 buffer,
while only 122x250 pixels are shown. While this can be ignored for rotations 0/270°,
with roations 90/180°, 6 pixels are cut-off from the top or left edge.
This change introduces a distinction between object width and controller width,
resulting in pixel-perfect rotations.
This commit is contained in:
unhold 2023-04-12 23:19:52 +02:00 committed by GitHub
parent 443c3c2a56
commit b5fbe0b145
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 23 additions and 3 deletions
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22
esphome/components/waveshare_epaper/waveshare_epaper.cpp
View file

@ -137,7 +137,7 @@ void HOT WaveshareEPaper::draw_absolute_pixel_internal(int x, int y, Color color
if (x >= this->get_width_internal() || y >= this->get_height_internal() || x < 0 || y < 0)
return;
const uint32_t pos = (x + y * this->get_width_internal()) / 8u;
const uint32_t pos = (x + y * this->get_width_controller()) / 8u;
const uint8_t subpos = x & 0x07;
// flip logic
if (!color.is_on()) {
@ -146,7 +146,9 @@ void HOT WaveshareEPaper::draw_absolute_pixel_internal(int x, int y, Color color
this->buffer_[pos] &= ~(0x80 >> subpos);
}
}
uint32_t WaveshareEPaper::get_buffer_length_() { return this->get_width_internal() * this->get_height_internal() / 8u; }
uint32_t WaveshareEPaper::get_buffer_length_() {
return this->get_width_controller() * this->get_height_internal() / 8u;
}
void WaveshareEPaper::start_command_() {
this->dc_pin_->digital_write(false);
this->enable();
@ -291,7 +293,7 @@ void HOT WaveshareEPaperTypeA::display() {
// COMMAND SET RAM X ADDRESS START END POSITION
this->command(0x44);
this->data(0x00);
this->data((this->get_width_internal() - 1) >> 3);
this->data((this->get_width_controller() - 1) >> 3);
// COMMAND SET RAM Y ADDRESS START END POSITION
this->command(0x45);
this->data(this->get_height_internal() - 1);
@ -392,12 +394,26 @@ int WaveshareEPaperTypeA::get_width_internal() {
case TTGO_EPAPER_2_13_IN_B73:
case TTGO_EPAPER_2_13_IN_B74:
case TTGO_EPAPER_2_13_IN_B1:
return 122;
case WAVESHARE_EPAPER_2_9_IN:
case WAVESHARE_EPAPER_2_9_IN_V2:
return 128;
}
return 0;
}
// The controller of the 2.13" displays has a buffer larger than screen size
int WaveshareEPaperTypeA::get_width_controller() {
switch (this->model_) {
case WAVESHARE_EPAPER_2_13_IN:
case TTGO_EPAPER_2_13_IN:
case TTGO_EPAPER_2_13_IN_B73:
case TTGO_EPAPER_2_13_IN_B74:
case TTGO_EPAPER_2_13_IN_B1:
return 128;
default:
return this->get_width_internal();
}
}
int WaveshareEPaperTypeA::get_height_internal() {
switch (this->model_) {
case WAVESHARE_EPAPER_1_54_IN:

4
esphome/components/waveshare_epaper/waveshare_epaper.h
View file

@ -54,6 +54,8 @@ class WaveshareEPaper : public PollingComponent,
}
}
virtual int get_width_controller() { return this->get_width_internal(); };
uint32_t get_buffer_length_();
uint32_t reset_duration_{200};
@ -111,6 +113,8 @@ class WaveshareEPaperTypeA : public WaveshareEPaper {
int get_height_internal() override;
int get_width_controller() override;
uint32_t full_update_every_{30};
uint32_t at_update_{0};
WaveshareEPaperTypeAModel model_;