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Updated Mcp3008 to support reference_voltage and voltage_sampler::VoltageSampler (#1387)

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Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
This commit is contained in:
SenexCrenshaw
2021-01-13 13:33:19 -05:00
committed by GitHub
parent e7b1d2efaa
commit 36089a1400
5 changed files with 53 additions and 22 deletions
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esphome/components/mcp3008/mcp3008.cpp
+20 -10
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@@ -15,19 +15,18 @@ void MCP3008::setup() {
void MCP3008::dump_config() {
ESP_LOGCONFIG(TAG, "MCP3008:");
LOG_PIN(" CS Pin: ", this->cs_);
LOG_PIN(" CS Pin:", this->cs_);
}
float MCP3008::read_data_(uint8_t pin) {
uint8_t data_msb = 0;
uint8_t data_lsb = 0;
float MCP3008::read_data(uint8_t pin) {
uint8_t data_msb, data_lsb = 0;
uint8_t command = ((0x01 << 7) | // start bit
((pin & 0x07) << 4)); // channel number
this->enable();
this->transfer_byte(0x01);
data_msb = this->transfer_byte(command) & 0x03;
data_lsb = this->transfer_byte(0x00);
@@ -35,18 +34,29 @@ float MCP3008::read_data_(uint8_t pin) {
int data = data_msb << 8 | data_lsb;
return data / 1024.0f;
return data / 1023.0f;
}
MCP3008Sensor::MCP3008Sensor(MCP3008 *parent, std::string name, uint8_t pin)
MCP3008Sensor::MCP3008Sensor(MCP3008 *parent, std::string name, uint8_t pin, float reference_voltage)
: PollingComponent(1000), parent_(parent), pin_(pin) {
this->set_name(name);
this->reference_voltage_ = reference_voltage;
}
float MCP3008Sensor::get_setup_priority() const { return setup_priority::DATA; }
void MCP3008Sensor::setup() { LOG_SENSOR("", "Setting up MCP3008 Sensor '%s'...", this); }
void MCP3008Sensor::update() {
float value_v = this->parent_->read_data_(pin_);
this->publish_state(value_v);
void MCP3008Sensor::dump_config() {
ESP_LOGCONFIG(TAG, "MCP3008Sensor:");
ESP_LOGCONFIG(TAG, " Pin: %u", this->pin_);
ESP_LOGCONFIG(TAG, " Reference Voltage: %.2fV", this->reference_voltage_);
}
float MCP3008Sensor::sample() {
float value_v = this->parent_->read_data(pin_);
value_v = (value_v * this->reference_voltage_);
return value_v;
}
void MCP3008Sensor::update() { this->publish_state(this->sample()); }
} // namespace mcp3008
} // namespace esphome