[axs15231] Touchscreen driver (#7592)

esphome/components/axs15231/__init__.py

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+import esphome.codegen as cg
+
+CODEOWNERS = ["@clydebarrow"]
+DEPENDENCIES = ["i2c"]
+
+axs15231_ns = cg.esphome_ns.namespace("axs15231")

esphome/components/axs15231/touchscreen/__init__.py

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+from esphome import pins
+import esphome.codegen as cg
+from esphome.components import i2c, touchscreen
+import esphome.config_validation as cv
+from esphome.const import CONF_ID, CONF_INTERRUPT_PIN, CONF_RESET_PIN
+
+from .. import axs15231_ns
+
+AXS15231Touchscreen = axs15231_ns.class_(
+    "AXS15231Touchscreen",
+    touchscreen.Touchscreen,
+    i2c.I2CDevice,
+)
+
+CONFIG_SCHEMA = (
+    touchscreen.touchscreen_schema("50ms")
+    .extend(
+        {
+            cv.GenerateID(): cv.declare_id(AXS15231Touchscreen),
+            cv.Optional(CONF_INTERRUPT_PIN): pins.internal_gpio_input_pin_schema,
+            cv.Optional(CONF_RESET_PIN): pins.gpio_output_pin_schema,
+        }
+    )
+    .extend(i2c.i2c_device_schema(0x3B))
+)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await touchscreen.register_touchscreen(var, config)
+    await i2c.register_i2c_device(var, config)
+
+    if interrupt_pin := config.get(CONF_INTERRUPT_PIN):
+        cg.add(var.set_interrupt_pin(await cg.gpio_pin_expression(interrupt_pin)))
+    if reset_pin := config.get(CONF_RESET_PIN):
+        cg.add(var.set_reset_pin(await cg.gpio_pin_expression(reset_pin)))

esphome/components/axs15231/touchscreen/axs15231_touchscreen.cpp

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+#include "axs15231_touchscreen.h"
+
+#include "esphome/core/helpers.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace axs15231 {
+
+static const char *const TAG = "ax15231.touchscreen";
+
+constexpr static const uint8_t AXS_READ_TOUCHPAD[11] = {0xb5, 0xab, 0xa5, 0x5a, 0x0, 0x0, 0x0, 0x8};
+
+#define ERROR_CHECK(err) \
+  if ((err) != i2c::ERROR_OK) { \
+    this->status_set_warning("Failed to communicate"); \
+    return; \
+  }
+
+void AXS15231Touchscreen::setup() {
+  ESP_LOGCONFIG(TAG, "Setting up AXS15231 Touchscreen...");
+  if (this->reset_pin_ != nullptr) {
+    this->reset_pin_->setup();
+    this->reset_pin_->digital_write(false);
+    delay(5);
+    this->reset_pin_->digital_write(true);
+    delay(10);
+  }
+  if (this->interrupt_pin_ != nullptr) {
+    this->interrupt_pin_->pin_mode(gpio::FLAG_INPUT);
+    this->interrupt_pin_->setup();
+    this->attach_interrupt_(this->interrupt_pin_, gpio::INTERRUPT_FALLING_EDGE);
+  }
+  this->x_raw_max_ = this->display_->get_native_width();
+  this->y_raw_max_ = this->display_->get_native_height();
+  ESP_LOGCONFIG(TAG, "AXS15231 Touchscreen setup complete");
+}
+
+void AXS15231Touchscreen::update_touches() {
+  i2c::ErrorCode err;
+  uint8_t data[8]{};
+
+  err = this->write(AXS_READ_TOUCHPAD, sizeof(AXS_READ_TOUCHPAD), false);
+  ERROR_CHECK(err);
+  err = this->read(data, sizeof(data));
+  ERROR_CHECK(err);
+  this->status_clear_warning();
+  if (data[0] != 0)  // no touches
+    return;
+  uint16_t x = encode_uint16(data[2] & 0xF, data[3]);
+  uint16_t y = encode_uint16(data[4] & 0xF, data[5]);
+  this->add_raw_touch_position_(0, x, y);
+}
+
+void AXS15231Touchscreen::dump_config() {
+  ESP_LOGCONFIG(TAG, "AXS15231 Touchscreen:");
+  LOG_I2C_DEVICE(this);
+  LOG_PIN("  Interrupt Pin: ", this->interrupt_pin_);
+  LOG_PIN("  Reset Pin: ", this->reset_pin_);
+  ESP_LOGCONFIG(TAG, "  Width: %d", this->x_raw_max_);
+  ESP_LOGCONFIG(TAG, "  Height: %d", this->y_raw_max_);
+}
+
+}  // namespace axs15231
+}  // namespace esphome

esphome/components/axs15231/touchscreen/axs15231_touchscreen.h

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+#pragma once
+
+#include "esphome/components/i2c/i2c.h"
+#include "esphome/components/touchscreen/touchscreen.h"
+#include "esphome/core/component.h"
+#include "esphome/core/hal.h"
+
+namespace esphome {
+namespace axs15231 {
+
+class AXS15231Touchscreen : public touchscreen::Touchscreen, public i2c::I2CDevice {
+ public:
+  void setup() override;
+  void dump_config() override;
+
+  void set_interrupt_pin(InternalGPIOPin *pin) { this->interrupt_pin_ = pin; }
+  void set_reset_pin(GPIOPin *pin) { this->reset_pin_ = pin; }
+
+ protected:
+  void update_touches() override;
+
+  InternalGPIOPin *interrupt_pin_{};
+  GPIOPin *reset_pin_{};
+};
+
+}  // namespace axs15231
+}  // namespace esphome