src/main/drivers/usb_msc_f4xx.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 /*
  22  * Author: Chris Hockuba (https://github.com/conkerkh)
  23  *
  24  */
  25
  26 #include <stdint.h>
  27 #include <stdbool.h>
  28 #include <string.h>
  29
  30 #include "platform.h"
  31
  32 #if defined(USE_USB_MSC)
  33
  34 #include "build/build_config.h"
  35
  36 #include "common/utils.h"
  37
  38 #include "blackbox/blackbox.h"
  39 #include "blackbox/blackbox_io.h"
  40
  41 #include "drivers/io.h"
  42 #include "drivers/light_led.h"
  43 #include "drivers/nvic.h"
  44 #include "drivers/persistent.h"
  45 #include "drivers/sdmmc_sdio.h"
  46 #include "drivers/time.h"
  47 #include "drivers/usb_msc.h"
  48
  49 #if defined(STM32F4)
  50 #include "usb_core.h"
  51 #include "usbd_cdc_vcp.h"
  52 #include "usb_io.h"
  53 #elif defined(STM32F7)
  54 #include "vcp_hal/usbd_cdc_interface.h"
  55 #include "usb_io.h"
  56 USBD_HandleTypeDef USBD_Device;
  57 #else
  58 #include "usb_core.h"
  59 #include "usb_init.h"
  60 #include "hw_config.h"
  61 #endif
  62
  63 #include "msc/usbd_storage.h"
  64
  65 #define DEBOUNCE_TIME_MS 20
  66
  67 #if defined(MSC_USE_BUTTON)
  68 static IO_t mscButton;
  69 #endif
  70
  71 void mscInit(void)
  72 {
  73 #if defined(MSC_USE_BUTTON)
  74     if (usbDevConfig()->mscButtonPin) {
  75         mscButton = IOGetByTag(usbDevConfig()->mscButtonPin);
  76         IOInit(mscButton, OWNER_USB_MSC_PIN, 0);
  77         if (usbDevConfig()->mscButtonUsePullup) {
  78             IOConfigGPIO(mscButton, IOCFG_IPU);
  79         } else {
  80             IOConfigGPIO(mscButton, IOCFG_IPD);
  81         }
  82     }
  83 #endif
  84 }
  85
  86 uint8_t mscStart(void)
  87 {
  88     ledInit(false);
  89
  90     //Start USB
  91     usbGenerateDisconnectPulse();
  92
  93     IOInit(IOGetByTag(IO_TAG(PA11)), OWNER_USB, 0, 0);
  94     IOInit(IOGetByTag(IO_TAG(PA12)), OWNER_USB, 0, 0);
  95
  96     switch (blackboxConfig()->device) {
  97 #ifdef USE_SDCARD
  98     case BLACKBOX_DEVICE_SDCARD:
  99         USBD_STORAGE_fops = &USBD_MSC_MICRO_SDIO_fops;
 100         break;
 101 #endif
 102
 103 #ifdef USE_FLASHFS
 104     case BLACKBOX_DEVICE_FLASH:
 105         USBD_STORAGE_fops = &USBD_MSC_EMFAT_fops;
 106         break;
 107 #endif
 108     default:
 109         return 1;
 110     }
 111
 112     USBD_Init(&USB_OTG_dev, USB_OTG_FS_CORE_ID, &MSC_desc, &USBD_MSC_cb, &USR_cb);
 113
 114     persistentObjectWrite(PERSISTENT_OBJECT_RESET_REASON, RESET_NONE);
 115
 116     // NVIC configuration for SYSTick
 117     NVIC_DisableIRQ(SysTick_IRQn);
 118     NVIC_SetPriority(SysTick_IRQn, 0);
 119     NVIC_EnableIRQ(SysTick_IRQn);
 120
 121     return 0;
 122 }
 123
 124 bool mscCheckButton(void)
 125 {
 126     bool result = false;
 127 #if defined(MSC_USE_BUTTON)
 128     if (mscButton) {
 129         uint8_t state = IORead(mscButton);
 130         if (usbDevConfig()->mscButtonUsePullup) {
 131             result = state == 0;
 132         } else {
 133             result = state == 1;
 134         }
 135     }
 136 #endif
 137     return result;
 138 }
 139
 140 void mscWaitForButton(void)
 141 {
 142     // In order to exit MSC mode simply disconnect the board, or push the button again.
 143     while (mscCheckButton());
 144     delay(DEBOUNCE_TIME_MS);
 145     while (true) {
 146         asm("NOP");
 147         if (mscCheckButton()) {
 148             delay(1);
 149             NVIC_SystemReset();
 150         }
 151     }
 152 }
 153 #endif