mpr121: Add GPIO support (#6776)

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

esphome/components/mpr121/binary_sensor/__init__.py

@@ -0,0 +1,37 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import binary_sensor
+from esphome.const import CONF_CHANNEL
+from .. import (
+    mpr121_ns,
+    MPR121Component,
+    CONF_MPR121_ID,
+    CONF_TOUCH_THRESHOLD,
+    CONF_RELEASE_THRESHOLD,
+)
+
+DEPENDENCIES = ["mpr121"]
+MPR121BinarySensor = mpr121_ns.class_("MPR121BinarySensor", binary_sensor.BinarySensor)
+
+CONFIG_SCHEMA = binary_sensor.binary_sensor_schema(MPR121BinarySensor).extend(
+    {
+        cv.GenerateID(CONF_MPR121_ID): cv.use_id(MPR121Component),
+        cv.Required(CONF_CHANNEL): cv.int_range(min=0, max=11),
+        cv.Optional(CONF_TOUCH_THRESHOLD): cv.int_range(min=0x05, max=0x30),
+        cv.Optional(CONF_RELEASE_THRESHOLD): cv.int_range(min=0x05, max=0x30),
+    }
+)
+
+
+async def to_code(config):
+    var = await binary_sensor.new_binary_sensor(config)
+    hub = await cg.get_variable(config[CONF_MPR121_ID])
+    cg.add(var.set_channel(config[CONF_CHANNEL]))
+    cg.register_parented(var, hub)
+
+    if CONF_TOUCH_THRESHOLD in config:
+        cg.add(var.set_touch_threshold(config[CONF_TOUCH_THRESHOLD]))
+    if CONF_RELEASE_THRESHOLD in config:
+        cg.add(var.set_release_threshold(config[CONF_RELEASE_THRESHOLD]))
+
+    cg.add(hub.register_channel(var))

esphome/components/mpr121/binary_sensor/mpr121_binary_sensor.cpp

@@ -0,0 +1,20 @@
+#include "mpr121_binary_sensor.h"
+
+namespace esphome {
+namespace mpr121 {
+
+void MPR121BinarySensor::setup() {
+  uint8_t touch_threshold = this->touch_threshold_.value_or(this->parent_->get_touch_threshold());
+  this->parent_->write_byte(MPR121_TOUCHTH_0 + 2 * this->channel_, touch_threshold);
+
+  uint8_t release_threshold = this->release_threshold_.value_or(this->parent_->get_release_threshold());
+  this->parent_->write_byte(MPR121_RELEASETH_0 + 2 * this->channel_, release_threshold);
+}
+
+void MPR121BinarySensor::process(uint16_t data) {
+  bool new_state = data & (1 << this->channel_);
+  this->publish_state(new_state);
+}
+
+}  // namespace mpr121
+}  // namespace esphome

esphome/components/mpr121/binary_sensor/mpr121_binary_sensor.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include "esphome/components/binary_sensor/binary_sensor.h"
+
+#include "../mpr121.h"
+
+namespace esphome {
+namespace mpr121 {
+
+class MPR121BinarySensor : public binary_sensor::BinarySensor, public MPR121Channel, public Parented<MPR121Component> {
+ public:
+  void set_channel(uint8_t channel) { this->channel_ = channel; }
+  void set_touch_threshold(uint8_t touch_threshold) { this->touch_threshold_ = touch_threshold; };
+  void set_release_threshold(uint8_t release_threshold) { this->release_threshold_ = release_threshold; };
+
+  void setup() override;
+  void process(uint16_t data) override;
+
+ protected:
+  uint8_t channel_{0};
+  optional<uint8_t> touch_threshold_{};
+  optional<uint8_t> release_threshold_{};
+};
+
+}  // namespace mpr121
+}  // namespace esphome