mirror of
https://github.com/esphome/esphome.git
synced 2024-12-02 19:54:14 +01:00
52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
#include "max6675.h"
|
|
#include "esphome/core/log.h"
|
|
|
|
namespace esphome {
|
|
namespace max6675 {
|
|
|
|
static const char *const TAG = "max6675";
|
|
|
|
void MAX6675Sensor::update() {
|
|
this->enable();
|
|
delay(1);
|
|
// conversion initiated by rising edge
|
|
this->disable();
|
|
|
|
// Conversion time typ: 170ms, max: 220ms
|
|
auto f = std::bind(&MAX6675Sensor::read_data_, this);
|
|
this->set_timeout("value", 250, f);
|
|
}
|
|
|
|
void MAX6675Sensor::setup() {
|
|
ESP_LOGCONFIG(TAG, "Setting up MAX6675Sensor '%s'...", this->name_.c_str());
|
|
this->spi_setup();
|
|
}
|
|
void MAX6675Sensor::dump_config() {
|
|
LOG_SENSOR("", "MAX6675", this);
|
|
LOG_PIN(" CS Pin: ", this->cs_);
|
|
LOG_UPDATE_INTERVAL(this);
|
|
}
|
|
float MAX6675Sensor::get_setup_priority() const { return setup_priority::DATA; }
|
|
void MAX6675Sensor::read_data_() {
|
|
this->enable();
|
|
delay(1);
|
|
uint8_t data[2];
|
|
this->read_array(data, 2);
|
|
uint16_t val = data[1] | (uint16_t(data[0]) << 8);
|
|
this->disable();
|
|
|
|
if ((val & 0x04) != 0) {
|
|
// Thermocouple open
|
|
ESP_LOGW(TAG, "Got invalid value from MAX6675Sensor (0x%04X)", val);
|
|
this->status_set_warning();
|
|
return;
|
|
}
|
|
|
|
float temperature = float(val >> 3) / 4.0f;
|
|
ESP_LOGD(TAG, "'%s': Got temperature=%.1f°C", this->name_.c_str(), temperature);
|
|
this->publish_state(temperature);
|
|
this->status_clear_warning();
|
|
}
|
|
|
|
} // namespace max6675
|
|
} // namespace esphome
|