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35 lines
1 KiB
C++
35 lines
1 KiB
C++
#include "mcp3204.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace mcp3204 {
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static const char *const TAG = "mcp3204";
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float MCP3204::get_setup_priority() const { return setup_priority::HARDWARE; }
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void MCP3204::setup() {
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ESP_LOGCONFIG(TAG, "Setting up mcp3204");
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this->spi_setup();
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}
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void MCP3204::dump_config() {
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ESP_LOGCONFIG(TAG, "MCP3204:");
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LOG_PIN(" CS Pin:", this->cs_);
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ESP_LOGCONFIG(TAG, " Reference Voltage: %.2fV", this->reference_voltage_);
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}
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float MCP3204::read_data(uint8_t pin) {
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uint8_t adc_primary_config = 0b00000110 & 0b00000111;
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uint8_t adc_secondary_config = pin << 6;
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this->enable();
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this->transfer_byte(adc_primary_config);
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uint8_t adc_primary_byte = this->transfer_byte(adc_secondary_config);
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uint8_t adc_secondary_byte = this->transfer_byte(0x00);
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this->disable();
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uint16_t digital_value = (adc_primary_byte << 8 | adc_secondary_byte) & 0b111111111111;
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return float(digital_value) / 4096.000 * this->reference_voltage_;
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}
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} // namespace mcp3204
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} // namespace esphome
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