Add reset_duration option for waveshare epaper HAT rev 2.1 (#1481)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/components/waveshare_epaper/display.py

@@ -1,6 +1,6 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
-from esphome import pins
+from esphome import core, pins
 from esphome.components import display, spi
 from esphome.const import (
     CONF_BUSY_PIN,
@@ -10,6 +10,7 @@ from esphome.const import (
     CONF_LAMBDA,
     CONF_MODEL,
     CONF_PAGES,
+    CONF_RESET_DURATION,
     CONF_RESET_PIN,
 )
 
@@ -95,6 +96,10 @@ CONFIG_SCHEMA = cv.All(
             cv.Optional(CONF_RESET_PIN): pins.gpio_output_pin_schema,
             cv.Optional(CONF_BUSY_PIN): pins.gpio_input_pin_schema,
             cv.Optional(CONF_FULL_UPDATE_EVERY): cv.uint32_t,
+            cv.Optional(CONF_RESET_DURATION): cv.All(
+                cv.positive_time_period_milliseconds,
+                cv.Range(max=core.TimePeriod(milliseconds=500)),
+            ),
         }
     )
     .extend(cv.polling_component_schema("1s"))
@@ -135,3 +140,5 @@ async def to_code(config):
         cg.add(var.set_busy_pin(reset))
     if CONF_FULL_UPDATE_EVERY in config:
         cg.add(var.set_full_update_every(config[CONF_FULL_UPDATE_EVERY]))
+    if CONF_RESET_DURATION in config:
+        cg.add(var.set_reset_duration(config[CONF_RESET_DURATION]))

esphome/components/waveshare_epaper/waveshare_epaper.h

@@ -16,6 +16,7 @@ class WaveshareEPaper : public PollingComponent,
   float get_setup_priority() const override;
   void set_reset_pin(GPIOPin *reset) { this->reset_pin_ = reset; }
   void set_busy_pin(GPIOPin *busy) { this->busy_pin_ = busy; }
+  void set_reset_duration(uint32_t reset_duration) { this->reset_duration_ = reset_duration; }
 
   void command(uint8_t value);
   void data(uint8_t value);
@@ -45,13 +46,14 @@ class WaveshareEPaper : public PollingComponent,
   void reset_() {
     if (this->reset_pin_ != nullptr) {
       this->reset_pin_->digital_write(false);
-      delay(200);  // NOLINT
+      delay(reset_duration_);  // NOLINT
       this->reset_pin_->digital_write(true);
       delay(200);  // NOLINT
     }
   }
 
   uint32_t get_buffer_length_();
+  uint32_t reset_duration_{200};
 
   void start_command_();
   void end_command_();

esphome/const.py

@@ -539,6 +539,7 @@ CONF_REFERENCE_TEMPERATURE = "reference_temperature"
 CONF_REFRESH = "refresh"
 CONF_REPEAT = "repeat"
 CONF_REPOSITORY = "repository"
+CONF_RESET_DURATION = "reset_duration"
 CONF_RESET_PIN = "reset_pin"
 CONF_RESIZE = "resize"
 CONF_RESOLUTION = "resolution"

tests/test4.yaml

@@ -413,6 +413,7 @@ display:
     reset_pin: GPIO23
     model: 2.90in
     full_update_every: 30
+    reset_duration: 200ms
     lambda: |-
       it.rectangle(0, 0, it.get_width(), it.get_height());
   - platform: waveshare_epaper