examples/port_info.c

   1 #include <libserialport.h>
   2 #include <stdio.h>
   3
   4 /* Example of how to get information about a serial port.
   5  *
   6  * This example file is released to the public domain. */
   7
   8 int main(int argc, char **argv)
   9 {
  10         /* Get the port name from the command line. */
  11         if (argc != 2) {
  12                 printf("Usage: %s <port name>\n", argv[0]);
  13                 return -1;
  14         }
  15         char *port_name = argv[1];
  16
  17         /* A pointer to a struct sp_port, which will refer to
  18          * the port found. */
  19         struct sp_port *port;
  20
  21         printf("Looking for port %s.\n", port_name);
  22
  23         /* Call sp_get_port_by_name() to find the port. The port
  24          * pointer will be updated to refer to the port found. */
  25         enum sp_return result = sp_get_port_by_name(port_name, &port);
  26
  27         if (result != SP_OK) {
  28                 printf("sp_get_port_by_name() failed!\n");
  29                 return -1;
  30         }
  31
  32         /* Display some basic information about the port. */
  33         printf("Port name: %s\n", sp_get_port_name(port));
  34         printf("Description: %s\n", sp_get_port_description(port));
  35
  36         /* Identify the transport which this port is connected through,
  37          * e.g. native port, USB or Bluetooth. */
  38         enum sp_transport transport = sp_get_port_transport(port);
  39
  40         if (transport == SP_TRANSPORT_NATIVE) {
  41                 /* This is a "native" port, usually directly connected
  42                  * to the system rather than some external interface. */
  43                 printf("Type: Native\n");
  44         } else if (transport == SP_TRANSPORT_USB) {
  45                 /* This is a USB to serial converter of some kind. */
  46                 printf("Type: USB\n");
  47
  48                 /* Display string information from the USB descriptors. */
  49                 printf("Manufacturer: %s\n", sp_get_port_usb_manufacturer(port));
  50                 printf("Product: %s\n", sp_get_port_usb_product(port));
  51                 printf("Serial: %s\n", sp_get_port_usb_serial(port));
  52
  53                 /* Display USB vendor and product IDs. */
  54                 int usb_vid, usb_pid;
  55                 sp_get_port_usb_vid_pid(port, &usb_vid, &usb_pid);
  56                 printf("VID: %04X PID: %04X\n", usb_vid, usb_pid);
  57
  58                 /* Display bus and address. */
  59                 int usb_bus, usb_address;
  60                 sp_get_port_usb_bus_address(port, &usb_bus, &usb_address);
  61                 printf("Bus: %d Address: %d\n", usb_bus, usb_address);
  62         } else if (transport == SP_TRANSPORT_BLUETOOTH) {
  63                 /* This is a Bluetooth serial port. */
  64                 printf("Type: Bluetooth\n");
  65
  66                 /* Display Bluetooth MAC address. */
  67                 printf("MAC: %s\n", sp_get_port_bluetooth_address(port));
  68         }
  69
  70         printf("Freeing port.\n");
  71
  72         /* Free the port structure created by sp_get_port_by_name(). */
  73         sp_free_port(port);
  74
  75         /* Note that this will also free the port name and other
  76          * strings retrieved from the port structure. If you want
  77          * to keep these, copy them before freeing the port. */
  78
  79         return 0;
  80 }