| 24 | } |
| 25 | |
| 26 | int PIEEGBoard::prepare_session () |
| 27 | { |
| 28 | if (initialized) |
| 29 | { |
| 30 | safe_logger (spdlog::level::info, "Session already prepared"); |
| 31 | return (int)BrainFlowExitCodes::STATUS_OK; |
| 32 | } |
| 33 | if (params.serial_port.empty ()) |
| 34 | { |
| 35 | params.serial_port = "/dev/spidev0.0"; |
| 36 | safe_logger (spdlog::level::info, "Use serial port {}", params.serial_port.c_str ()); |
| 37 | } |
| 38 | |
| 39 | gpio_in = gpio_new (); |
| 40 | if (gpio_open (gpio_in, "/dev/gpiochip0", 26, GPIO_DIR_IN) < 0) |
| 41 | { |
| 42 | safe_logger (spdlog::level::err, "failed to open gpio"); |
| 43 | gpio_free (gpio_in); |
| 44 | gpio_in = NULL; |
| 45 | return (int)BrainFlowExitCodes::UNABLE_TO_OPEN_PORT_ERROR; |
| 46 | } |
| 47 | spi = spi_new (); |
| 48 | if (spi_open_advanced (spi, params.serial_port.c_str (), 0b01, 1000000, MSB_FIRST, 8, 1) < 0) |
| 49 | { |
| 50 | safe_logger (spdlog::level::err, "failed to open spi dev"); |
| 51 | spi_free (spi); |
| 52 | spi = NULL; |
| 53 | gpio_free (gpio_in); |
| 54 | gpio_in = NULL; |
| 55 | return (int)BrainFlowExitCodes::UNABLE_TO_OPEN_PORT_ERROR; |
| 56 | } |
| 57 | int gpio_res = gpio_set_edge (gpio_in, GPIO_EDGE_FALLING); |
| 58 | if (gpio_res != 0) |
| 59 | { |
| 60 | safe_logger (spdlog::level::err, "failed to set gpio edge event handler: {}", gpio_res); |
| 61 | spi_free (spi); |
| 62 | spi = NULL; |
| 63 | gpio_free (gpio_in); |
| 64 | gpio_in = NULL; |
| 65 | return (int)BrainFlowExitCodes::UNABLE_TO_OPEN_PORT_ERROR; |
| 66 | } |
| 67 | |
| 68 | initialized = true; |
| 69 | return (int)BrainFlowExitCodes::STATUS_OK; |
| 70 | } |
| 71 | |
| 72 | int PIEEGBoard::start_stream (int buffer_size, const char *streamer_params) |
| 73 | { |