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36 lines
905 B
C++
36 lines
905 B
C++
#include "mcp4725.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace mcp4725 {
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static const char *const TAG = "mcp4725";
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void MCP4725::setup() {
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ESP_LOGCONFIG(TAG, "Running setup for address 0x%02X", this->address_);
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auto err = this->write(nullptr, 0);
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if (err != i2c::ERROR_OK) {
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this->error_code_ = COMMUNICATION_FAILED;
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this->mark_failed();
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return;
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}
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}
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void MCP4725::dump_config() {
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LOG_I2C_DEVICE(this);
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if (this->error_code_ == COMMUNICATION_FAILED) {
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ESP_LOGE(TAG, ESP_LOG_MSG_COMM_FAIL);
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}
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}
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// https://learn.sparkfun.com/tutorials/mcp4725-digital-to-analog-converter-hookup-guide?_ga=2.176055202.1402343014.1607953301-893095255.1606753886
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void MCP4725::write_state(float state) {
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const uint16_t value = (uint16_t) round(state * (pow(2, MCP4725_RES) - 1));
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this->write_byte_16(64, value << 4);
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}
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} // namespace mcp4725
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} // namespace esphome
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