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Fix Waveshare 7.5v2 epaper screens are always powered on (#5283)

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phoenixswiss 2023-09-14 08:20:21 +02:00 committed by Jesse Hills
parent b3ca71c6fb
commit ec20778d83
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GPG Key ID: BEAAE804EFD8E83A
2 changed files with 61 additions and 9 deletions
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66
esphome/components/waveshare_epaper/waveshare_epaper.cpp
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@ -1561,6 +1561,23 @@ void WaveshareEPaper7P5In::dump_config() {
LOG_PIN(" Busy Pin: ", this->busy_pin_);
LOG_UPDATE_INTERVAL(this);
}
bool WaveshareEPaper7P5InV2::wait_until_idle_() {
if (this->busy_pin_ == nullptr) {
return true;
}
const uint32_t start = millis();
while (this->busy_pin_->digital_read()) {
this->command(0x71);
if (millis() - start > this->idle_timeout_()) {
ESP_LOGE(TAG, "Timeout while displaying image!");
return false;
}
App.feed_wdt();
delay(10);
}
return true;
}
void WaveshareEPaper7P5InV2::initialize() {
// COMMAND POWER SETTING
this->command(0x01);
@ -1568,10 +1585,21 @@ void WaveshareEPaper7P5InV2::initialize() {
this->data(0x07);
this->data(0x3f);
this->data(0x3f);
this->command(0x04);
// We don't want the display to be powered at this point
delay(100); // NOLINT
this->wait_until_idle_();
// COMMAND VCOM AND DATA INTERVAL SETTING
this->command(0x50);
this->data(0x10);
this->data(0x07);
// COMMAND TCON SETTING
this->command(0x60);
this->data(0x22);
// COMMAND PANEL SETTING
this->command(0x00);
this->data(0x1F);
@ -1582,19 +1610,30 @@ void WaveshareEPaper7P5InV2::initialize() {
this->data(0x20);
this->data(0x01);
this->data(0xE0);
// COMMAND ...?
// COMMAND DUAL SPI MM_EN, DUSPI_EN
this->command(0x15);
this->data(0x00);
// COMMAND VCOM AND DATA INTERVAL SETTING
this->command(0x50);
this->data(0x10);
this->data(0x07);
// COMMAND TCON SETTING
this->command(0x60);
this->data(0x22);
// COMMAND POWER DRIVER HAT DOWN
// This command will turn off booster, controller, source driver, gate driver, VCOM, and
// temperature sensor, but register data will be kept until VDD turned OFF or Deep Sleep Mode.
// Source/Gate/Border/VCOM will be released to floating.
this->command(0x02);
}
void HOT WaveshareEPaper7P5InV2::display() {
uint32_t buf_len = this->get_buffer_length_();
// COMMAND POWER ON
ESP_LOGI(TAG, "Power on the display and hat");
// This command will turn on booster, controller, regulators, and temperature sensor will be
// activated for one-time sensing before enabling booster. When all voltages are ready, the
// BUSY_N signal will return to high.
this->command(0x04);
delay(200); // NOLINT
this->wait_until_idle_();
// COMMAND DATA START TRANSMISSION NEW DATA
this->command(0x13);
delay(2);
@ -1602,14 +1641,23 @@ void HOT WaveshareEPaper7P5InV2::display() {
this->data(~(this->buffer_[i]));
}
delay(100); // NOLINT
this->wait_until_idle_();
// COMMAND DISPLAY REFRESH
this->command(0x12);
delay(100); // NOLINT
this->wait_until_idle_();
ESP_LOGV(TAG, "Before command(0x02) (>> power off)");
this->command(0x02);
this->wait_until_idle_();
ESP_LOGV(TAG, "After command(0x02) (>> power off)");
}
int WaveshareEPaper7P5InV2::get_width_internal() { return 800; }
int WaveshareEPaper7P5InV2::get_height_internal() { return 480; }
uint32_t WaveshareEPaper7P5InV2::idle_timeout_() { return 10000; }
void WaveshareEPaper7P5InV2::dump_config() {
LOG_DISPLAY("", "Waveshare E-Paper", this);
ESP_LOGCONFIG(TAG, " Model: 7.5inV2rev2");

4
esphome/components/waveshare_epaper/waveshare_epaper.h
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@ -472,6 +472,8 @@ class WaveshareEPaper7P5InBC : public WaveshareEPaper {
class WaveshareEPaper7P5InV2 : public WaveshareEPaper {
public:
bool wait_until_idle_();
void initialize() override;
void display() override;
@ -491,6 +493,8 @@ class WaveshareEPaper7P5InV2 : public WaveshareEPaper {
int get_width_internal() override;
int get_height_internal() override;
uint32_t idle_timeout_() override;
};
class WaveshareEPaper7P5InV2alt : public WaveshareEPaper7P5InV2 {