CTL_STATUS_t wii_extension_controller_read_memory(CTL_I2C_BUS_t *bus, int mem_addr, void *data, int n);
wii_extension_controller_read_memory reads the contents of a Wii extension controller on I2C bus bus. n bytes of memory are read from the controller starting at address mem_addr and written to the object pointed to by data.
wii_extension_controller_read_memory returns a standard status code.
wii_extension_controller_read_memory is thread-safe if a mutex is associated with the I2C bus bus.