When your application is started, you can then use those pins for something else, like having an LED on GPIO15 and having an I2C bus on GPIO2/GPIO0. Just make sure your attached hardware doesn't conflict with the boot process.
When your application is started, you can then use those pins for something else, like having an LED on GPIO15 and having an I2C bus on GPIO2/GPIO0. Just make sure your attached hardware doesn't conflict with the boot process.