axs15231_touchscreen.cpp

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#include "axs15231_touchscreen.h"
 
#include "esphome/core/helpers.h"
#include "esphome/core/log.h"
 
namespace esphome::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(LOG_STR("Failed to communicate")); \
    return; \
  }
 
void AXS15231Touchscreen::setup() {
  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);
  }
  if (this->x_raw_max_ == 0) {
    this->x_raw_max_ = this->display_->get_native_width();
  }
  if (this->y_raw_max_ == 0) {
    this->y_raw_max_ = this->display_->get_native_height();
  }
}
 
void AXS15231Touchscreen::update_touches() {
  i2c::ErrorCode err;
  uint8_t data[8]{};
 
  err = this->write(AXS_READ_TOUCHPAD, sizeof(AXS_READ_TOUCHPAD));
  ERROR_CHECK(err);
  err = this->read(data, sizeof(data));
  ERROR_CHECK(err);
  this->status_clear_warning();
  if (data[0] != 0 || data[1] == 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\n"
                "  Height: %d",
                this->x_raw_max_, this->y_raw_max_);
}
 
}  // namespace esphome::axs15231