src/main/drivers/usb_io.c

   1 /*
   2  * This file is part of Cleanflight and Betaflight.
   3  *
   4  * Cleanflight and Betaflight are free software. You can redistribute
   5  * this software and/or modify this software under the terms of the
   6  * GNU General Public License as published by the Free Software
   7  * Foundation, either version 3 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * Cleanflight and Betaflight are distributed in the hope that they
  11  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  12  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this software.
  17  *
  18  * If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <stdbool.h>
  22 #include <stdint.h>
  23
  24 #include "platform.h"
  25
  26 #ifdef USE_VCP
  27
  28 #include "drivers/io.h"
  29 #include "drivers/time.h"
  30 #include "usb_io.h"
  31 #include "sdcard.h"
  32
  33 #ifdef USE_USB_DETECT
  34 static IO_t usbDetectPin;
  35 #endif
  36
  37 void usbCableDetectDeinit(void)
  38 {
  39 #ifdef USE_USB_DETECT
  40     IOInit(usbDetectPin, OWNER_FREE, 0);
  41     IOConfigGPIO(usbDetectPin, IOCFG_IN_FLOATING);
  42     usbDetectPin = IO_NONE;
  43 #endif
  44 }
  45
  46 void usbCableDetectInit(void)
  47 {
  48 #ifdef USE_USB_DETECT
  49     usbDetectPin = IOGetByTag(IO_TAG(USB_DETECT_PIN));
  50
  51     IOInit(usbDetectPin, OWNER_USB_DETECT, 0);
  52     IOConfigGPIO(usbDetectPin, IOCFG_IPD);
  53 #endif
  54 }
  55
  56 bool usbCableIsInserted(void)
  57 {
  58     bool result = false;
  59
  60 #ifdef USE_USB_DETECT
  61     if (usbDetectPin) {
  62         result = IORead(usbDetectPin) != 0;
  63     }
  64 #endif
  65
  66     return result;
  67 }
  68
  69 void usbGenerateDisconnectPulse(void)
  70 {
  71     /* Pull down PA12 to create USB disconnect pulse */
  72     IO_t usbPin = IOGetByTag(IO_TAG(PA12));
  73     IOConfigGPIO(usbPin, IOCFG_OUT_OD);
  74
  75     IOLo(usbPin);
  76
  77     delay(200);
  78
  79     IOHi(usbPin);
  80 }
  81 #endif