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50 lines
1.4 KiB
50 lines
1.4 KiB
#pragma once
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#include <cstdint>
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#include <unistd.h>
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#include "cereal/gen/cpp/log.capnp.h"
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#include "common/i2c.h"
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#include "common/gpio.h"
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#include "common/swaglog.h"
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#include "system/sensord/sensors/constants.h"
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#include "system/sensord/sensors/sensor.h"
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int16_t read_12_bit(uint8_t lsb, uint8_t msb);
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int16_t read_16_bit(uint8_t lsb, uint8_t msb);
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int32_t read_20_bit(uint8_t b2, uint8_t b1, uint8_t b0);
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class I2CSensor : public Sensor {
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private:
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I2CBus *bus;
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int gpio_nr;
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bool shared_gpio;
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virtual uint8_t get_device_address() = 0;
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public:
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I2CSensor(I2CBus *bus, int gpio_nr = 0, bool shared_gpio = false);
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~I2CSensor();
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int read_register(uint register_address, uint8_t *buffer, uint8_t len);
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int set_register(uint register_address, uint8_t data);
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int init_gpio();
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bool has_interrupt_enabled();
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virtual int init() = 0;
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virtual bool get_event(MessageBuilder &msg, uint64_t ts = 0) = 0;
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virtual int shutdown() = 0;
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int verify_chip_id(uint8_t address, const std::vector<uint8_t> &expected_ids) {
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uint8_t chip_id = 0;
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int ret = read_register(address, &chip_id, 1);
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if (ret < 0) {
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LOGE("Reading chip ID failed: %d", ret);
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return -1;
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}
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for (int i = 0; i < expected_ids.size(); ++i) {
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if (chip_id == expected_ids[i]) return chip_id;
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}
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LOGE("Chip ID wrong. Got: %d, Expected %d", chip_id, expected_ids[0]);
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return -1;
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}
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};
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