CTL_GYROSCOPE_t *platform_configure_builtin_gyroscope(void);
platform_configure_builtin_gyroscope configures the platform's built-in gyroscope, if there is one. If there is no built-in gyroscope available, or the resources (SPI bus, I2C bus etc.) are not available to support the gyroscope, platform_configure_builtin_gyroscope returns zero.