You can use this library w/o Arduino e.g. by building with cmake.

In this case you need to provide the implementation for the following "C" methods:

• error_t i2c_bus_create(struct I2CConfig *pin);
• error_t i2c_bus_write_bytes(i2c_bus_handle_t bus, int addr, uint8_t *reg, int regLen, uint8_t *data, int datalen);
• error_t i2c_bus_read_bytes(i2c_bus_handle_t bus, int addr, uint8_t *reg, int reglen, uint8_t *outdata, int datalen);
• void i2c_bus_delete(i2c_bus_handle_t bus);
• void pinMode(int, int);
• void digitalWrite(int, int);
• void delay(uint32_t);

The following restrictions apply:

• Drivers that use SPI are not supported (AD1938)
• Touch Pins are not supported (LyraT)
• Pins using analogRead() are not supported (LyraTMini)