+ bool set_gpio_ddr(uint16_t value, uint16_t mask);
+ bool set_gpio_sels(std::string sels);
+ bool write_gpio(uint16_t value, uint16_t mask);
+ %rename(_real_read_gpio) read_gpio;
+ bool read_gpio(uint16_t *value);
+ bool start_streaming_at(usrp2::fpga_timestamp time);