Tomas Cerskus / USBDevice

USB device stack with Nucleo F401RE support. NOTE: the default clock config needs to be changed to in order for USB to work.

Fork of USBDevice by Tomas Cerskus

Slightly modified original USBDevice library to support F401RE.

On F401RE the data pins of your USB connector should be attached to PA12 (D+) and PA11(D-). It is also required to connect the +5V USB line to PA9.

F401RE requires 48MHz clock for USB. Therefore in order for this to work you will need to change the default clock settings:

Clock settings for USB

#include "stm32f4xx_hal.h"

RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = 16;
RCC_OscInitStruct.PLL.PLLN = 336;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
RCC_OscInitStruct.PLL.PLLQ = 7;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
    error("RTC error: LSI clock initialization failed."); 
}

NOTE: Changing the clock frequency might affect the behavior of other libraries. I only tested the Serial library.

UPDATE: Clock settings should not to be changed anymore! Looks like the newer mbed library has the required clock enabled.

USBDevice/USBDescriptor.h

Committer:
tolaipner
Date:
2014-03-30
Revision:
24:4ed3e25c3edc
Parent:
1:80ab0d068708

File content as of revision 24:4ed3e25c3edc:

/* Copyright (c) 2010-2011 mbed.org, MIT License
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

/* Standard descriptor types */
#define DEVICE_DESCRIPTOR        (1)
#define CONFIGURATION_DESCRIPTOR (2)
#define STRING_DESCRIPTOR        (3)
#define INTERFACE_DESCRIPTOR     (4)
#define ENDPOINT_DESCRIPTOR      (5)
#define QUALIFIER_DESCRIPTOR     (6)

/* Standard descriptor lengths */
#define DEVICE_DESCRIPTOR_LENGTH        (0x12)
#define CONFIGURATION_DESCRIPTOR_LENGTH (0x09)
#define INTERFACE_DESCRIPTOR_LENGTH     (0x09)
#define ENDPOINT_DESCRIPTOR_LENGTH      (0x07)


/*string offset*/
#define STRING_OFFSET_LANGID            (0) 
#define STRING_OFFSET_IMANUFACTURER     (1)
#define STRING_OFFSET_IPRODUCT          (2)
#define STRING_OFFSET_ISERIAL           (3)
#define STRING_OFFSET_ICONFIGURATION    (4)
#define STRING_OFFSET_IINTERFACE        (5)

/* USB Specification Release Number */
#define USB_VERSION_2_0 (0x0200)

/* Least/Most significant byte of short integer */
#define LSB(n)  ((n)&0xff)
#define MSB(n)  (((n)&0xff00)>>8)

/* Convert physical endpoint number to descriptor endpoint number */
#define PHY_TO_DESC(endpoint) (((endpoint)>>1) | (((endpoint) & 1) ? 0x80:0))

/* bmAttributes in configuration descriptor */
/* C_RESERVED must always be set */
#define C_RESERVED      (1U<<7)
#define C_SELF_POWERED  (1U<<6)
#define C_REMOTE_WAKEUP (1U<<5)

/* bMaxPower in configuration descriptor */
#define C_POWER(mA)     ((mA)/2)

/* bmAttributes in endpoint descriptor */
#define E_CONTROL       (0x00)
#define E_ISOCHRONOUS   (0x01)
#define E_BULK          (0x02)
#define E_INTERRUPT     (0x03)

/* For isochronous endpoints only: */
#define E_NO_SYNCHRONIZATION    (0x00)
#define E_ASYNCHRONOUS          (0x04)
#define E_ADAPTIVE              (0x08)
#define E_SYNCHRONOUS           (0x0C)
#define E_DATA                  (0x00)
#define E_FEEDBACK              (0x10)
#define E_IMPLICIT_FEEDBACK     (0x20)