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annotate libuwrap/open_close.c @ 67:742c41f44658

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doc/FTDI-chip-ID: new article
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 13 Sep 2023 00:43:14 +0000
parents 80e521d6609c
children
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80e521d6609c libuwrap: implement USB device open and close
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * Here we implement functions for opening and closing the libusb device
80e521d6609c libuwrap: implement USB device open and close
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3 * we have located.
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4 */
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5
80e521d6609c libuwrap: implement USB device open and close
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6 #include <stdio.h>
80e521d6609c libuwrap: implement USB device open and close
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7 #include <stdlib.h>
80e521d6609c libuwrap: implement USB device open and close
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8 #include <usb.h>
80e521d6609c libuwrap: implement USB device open and close
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9 #include "open_close.h"
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10
80e521d6609c libuwrap: implement USB device open and close
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11 usb_dev_handle *usbwrap_open_dev(struct usb_device *dev, int detach)
80e521d6609c libuwrap: implement USB device open and close
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12 {
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13 usb_dev_handle *usbh;
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14
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15 usbh = usb_open(dev);
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16 if (!usbh) {
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17 fprintf(stderr, "error: usb_open() failed\n");
80e521d6609c libuwrap: implement USB device open and close
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18 exit(1);
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19 }
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20 if (detach)
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21 usb_detach_kernel_driver_np(usbh, 0);
80e521d6609c libuwrap: implement USB device open and close
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22 if (usb_claim_interface(usbh, 0) != 0) {
80e521d6609c libuwrap: implement USB device open and close
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23 fprintf(stderr, "error: usb_claim_interface() failed\n");
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24 exit(1);
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25 }
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26 return usbh;
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27 }
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28
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29 void usbwrap_close_dev(usb_dev_handle *usbh)
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30 {
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31 usb_release_interface(usbh, 0);
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32 usb_close(usbh);
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33 }