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31 lines
896 B
31 lines
896 B
#include "bmx055_temp.h"
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#include <cassert>
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#include "system/sensord/sensors/bmx055_accel.h"
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#include "common/swaglog.h"
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#include "common/timing.h"
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BMX055_Temp::BMX055_Temp(I2CBus *bus) : I2CSensor(bus) {}
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int BMX055_Temp::init() {
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return verify_chip_id(BMX055_ACCEL_I2C_REG_ID, {BMX055_ACCEL_CHIP_ID}) == -1 ? -1 : 0;
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}
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bool BMX055_Temp::get_event(MessageBuilder &msg, uint64_t ts) {
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uint64_t start_time = nanos_since_boot();
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uint8_t buffer[1];
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int len = read_register(BMX055_ACCEL_I2C_REG_TEMP, buffer, sizeof(buffer));
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assert(len == sizeof(buffer));
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float temp = 23.0f + int8_t(buffer[0]) / 2.0f;
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auto event = msg.initEvent().initTemperatureSensor();
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event.setSource(cereal::SensorEventData::SensorSource::BMX055);
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event.setVersion(1);
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event.setType(SENSOR_TYPE_AMBIENT_TEMPERATURE);
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event.setTimestamp(start_time);
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event.setTemperature(temp);
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return true;
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}
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