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MCP3204 differential mode support

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This commit is contained in:
marko 2024-09-12 17:33:49 +02:00
parent c90dcfc0ca
commit b063fa17f8
5 changed files with 41 additions and 16 deletions
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25
esphome/components/mcp3204/mcp3204.cpp
View file

@ -19,16 +19,25 @@ void MCP3204::dump_config() {
ESP_LOGCONFIG(TAG, " Reference Voltage: %.2fV", this->reference_voltage_);
}
float MCP3204::read_data(uint8_t pin) {
uint8_t adc_primary_config = 0b00000110 | (pin >> 2);
uint8_t adc_secondary_config = pin << 6;
float MCP3204::read_data(uint8_t channel, bool differential) {
uint8_t command, sgldiff;
uint8_t b0, b1, b2;
sgldiff = differential ? 0 : 1;
command = ((0x01 << 7) | // start bit
(sgldiff << 6) | // single or differential
((channel & 0x07) << 3)); // channel number
this->enable();
this->transfer_byte(adc_primary_config);
uint8_t adc_primary_byte = this->transfer_byte(adc_secondary_config);
uint8_t adc_secondary_byte = this->transfer_byte(0x00);
b0 = this->transfer_byte(command);
b1 = this->transfer_byte(0x00);
b2 = this->transfer_byte(0x00);
this->disable();
uint16_t digital_value = (adc_primary_byte << 8 | adc_secondary_byte) & 0b111111111111;
return float(digital_value) / 4096.000 * this->reference_voltage_;
uint16_t digital_value = 0xFFF & ((b0 & 0x01) << 11 | (b1 & 0xFF) << 3 | (b2 & 0xE0) >> 5);
return float(digital_value) / 4096.000 * this->reference_voltage_; // in V
}
} // namespace mcp3204

11
esphome/components/mcp3204/mcp3204.h
View file

@ -8,17 +8,22 @@ namespace esphome {
namespace mcp3204 {
class MCP3204 : public Component,
public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_LOW, spi::CLOCK_PHASE_LEADING,
public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST,
spi::CLOCK_POLARITY_LOW,
spi::CLOCK_PHASE_LEADING,
spi::DATA_RATE_1MHZ> {
public:
MCP3204() = default;
void set_reference_voltage(float reference_voltage) { this->reference_voltage_ = reference_voltage; }
void set_reference_voltage(float reference_voltage)
{
this->reference_voltage_ = reference_voltage;
}
void setup() override;
void dump_config() override;
float get_setup_priority() const override;
float read_data(uint8_t pin);
float read_data(uint8_t pin, bool diffmode);
protected:
float reference_voltage_;

3
esphome/components/mcp3204/sensor/__init__.py
View file

@ -12,6 +12,7 @@ MCP3204Sensor = mcp3204_ns.class_(
"MCP3204Sensor", sensor.Sensor, cg.PollingComponent, voltage_sampler.VoltageSampler
)
CONF_MCP3204_ID = "mcp3204_id"
CONF_DIFF_MODE = "diff_mode"
CONFIG_SCHEMA = (
sensor.sensor_schema(MCP3204Sensor)
@ -19,6 +20,7 @@ CONFIG_SCHEMA = (
{
cv.GenerateID(CONF_MCP3204_ID): cv.use_id(MCP3204),
cv.Required(CONF_NUMBER): cv.int_range(min=0, max=7),
cv.Optional(CONF_DIFF_MODE, default = 'false'): cv.boolean,
}
)
.extend(cv.polling_component_schema("60s"))
@ -29,6 +31,7 @@ async def to_code(config):
var = cg.new_Pvariable(
config[CONF_ID],
config[CONF_NUMBER],
config[CONF_DIFF_MODE],
)
await cg.register_parented(var, config[CONF_MCP3204_ID])
await cg.register_component(var, config)

15
esphome/components/mcp3204/sensor/mcp3204_sensor.cpp
View file

@ -7,17 +7,24 @@ namespace mcp3204 {
static const char *const TAG = "mcp3204.sensor";
MCP3204Sensor::MCP3204Sensor(uint8_t pin) : pin_(pin) {}
MCP3204Sensor::MCP3204Sensor(uint8_t pin, bool diffmode) : pin_(pin), diffmode_(diffmode) {}
float MCP3204Sensor::get_setup_priority() const { return setup_priority::DATA; }
void MCP3204Sensor::dump_config() {
LOG_SENSOR("", "MCP3204 Sensor", this);
ESP_LOGCONFIG(TAG, " Pin: %u", this->pin_);
ESP_LOGCONFIG(TAG, " PIN: %u", this->pin_);
ESP_LOGCONFIG(TAG, " DIFFERENTIAL MODE: %u", this->diffmode_);
LOG_UPDATE_INTERVAL(this);
}
float MCP3204Sensor::sample() { return this->parent_->read_data(this->pin_); }
void MCP3204Sensor::update() { this->publish_state(this->sample()); }
float MCP3204Sensor::sample()
{
return this->parent_->read_data(this->pin_, this->diffmode_);
}
void MCP3204Sensor::update()
{
this->publish_state(this->sample());
}
} // namespace mcp3204
} // namespace esphome

3
esphome/components/mcp3204/sensor/mcp3204_sensor.h
View file

@ -15,7 +15,7 @@ class MCP3204Sensor : public PollingComponent,
public sensor::Sensor,
public voltage_sampler::VoltageSampler {
public:
MCP3204Sensor(uint8_t pin);
MCP3204Sensor(uint8_t pin, bool diffmode);
void update() override;
void dump_config() override;
@ -24,6 +24,7 @@ class MCP3204Sensor : public PollingComponent,
protected:
uint8_t pin_;
uint8_t diffmode_;
};
} // namespace mcp3204