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.

USBSerial/USBSerial.h@1:80ab0d068708, 2012-07-17 (annotated)

Committer:
samux
Date:
Tue Jul 17 14:30:29 2012 +0000
Revision:
1:80ab0d068708
Child:
15:849c0c0f2769
Update USBDevice lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 1:80ab0d068708 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
samux 1:80ab0d068708 2 *
samux 1:80ab0d068708 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 1:80ab0d068708 4 * and associated documentation files (the "Software"), to deal in the Software without
samux 1:80ab0d068708 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
samux 1:80ab0d068708 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
samux 1:80ab0d068708 7 * Software is furnished to do so, subject to the following conditions:
samux 1:80ab0d068708 8 *
samux 1:80ab0d068708 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 1:80ab0d068708 10 * substantial portions of the Software.
samux 1:80ab0d068708 11 *
samux 1:80ab0d068708 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 1:80ab0d068708 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 1:80ab0d068708 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 1:80ab0d068708 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 1:80ab0d068708 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 1:80ab0d068708 17 */
samux 1:80ab0d068708 18
samux 1:80ab0d068708 19 #ifndef USBSERIAL_H
samux 1:80ab0d068708 20 #define USBSERIAL_H
samux 1:80ab0d068708 21
samux 1:80ab0d068708 22 #include "USBCDC.h"
samux 1:80ab0d068708 23 #include "Stream.h"
samux 1:80ab0d068708 24 #include "CircBuffer.h"
samux 1:80ab0d068708 25
samux 1:80ab0d068708 26
samux 1:80ab0d068708 27 /**
samux 1:80ab0d068708 28 * USBSerial example
samux 1:80ab0d068708 29 *
samux 1:80ab0d068708 30 * @code
samux 1:80ab0d068708 31 * #include "mbed.h"
samux 1:80ab0d068708 32 * #include "USBSerial.h"
samux 1:80ab0d068708 33 *
samux 1:80ab0d068708 34 * //Virtual serial port over USB
samux 1:80ab0d068708 35 * USBSerial serial;
samux 1:80ab0d068708 36 *
samux 1:80ab0d068708 37 * int main(void) {
samux 1:80ab0d068708 38 *
samux 1:80ab0d068708 39 * while(1)
samux 1:80ab0d068708 40 * {
samux 1:80ab0d068708 41 * serial.printf("I am a virtual serial port\n");
samux 1:80ab0d068708 42 * wait(1);
samux 1:80ab0d068708 43 * }
samux 1:80ab0d068708 44 * }
samux 1:80ab0d068708 45 * @endcode
samux 1:80ab0d068708 46 */
samux 1:80ab0d068708 47 class USBSerial: public USBCDC, public Stream {
samux 1:80ab0d068708 48 public:
samux 1:80ab0d068708 49
samux 1:80ab0d068708 50 /**
samux 1:80ab0d068708 51 * Constructor
samux 1:80ab0d068708 52 *
samux 1:80ab0d068708 53 * @param vendor_id Your vendor_id (default: 0x1f00)
samux 1:80ab0d068708 54 * @param product_id Your product_id (default: 0x2012)
samux 1:80ab0d068708 55 * @param product_release Your preoduct_release (default: 0x0001)
samux 1:80ab0d068708 56 *
samux 1:80ab0d068708 57 */
samux 1:80ab0d068708 58 USBSerial(uint16_t vendor_id = 0x1f00, uint16_t product_id = 0x2012, uint16_t product_release = 0x0001): USBCDC(vendor_id, product_id, product_release), buf(128){ };
samux 1:80ab0d068708 59
samux 1:80ab0d068708 60
samux 1:80ab0d068708 61 /**
samux 1:80ab0d068708 62 * Send a character. You can use puts, printf.
samux 1:80ab0d068708 63 *
samux 1:80ab0d068708 64 * @param c character to be sent
samux 1:80ab0d068708 65 * @returns true if there is no error, false otherwise
samux 1:80ab0d068708 66 */
samux 1:80ab0d068708 67 virtual int _putc(int c);
samux 1:80ab0d068708 68
samux 1:80ab0d068708 69 /**
samux 1:80ab0d068708 70 * Read a character: blocking
samux 1:80ab0d068708 71 *
samux 1:80ab0d068708 72 * @returns character read
samux 1:80ab0d068708 73 */
samux 1:80ab0d068708 74 virtual int _getc();
samux 1:80ab0d068708 75
samux 1:80ab0d068708 76 /**
samux 1:80ab0d068708 77 * Check the number of bytes available.
samux 1:80ab0d068708 78 *
samux 1:80ab0d068708 79 * @returns the number of bytes available
samux 1:80ab0d068708 80 */
samux 1:80ab0d068708 81 uint8_t available();
samux 1:80ab0d068708 82
samux 1:80ab0d068708 83 /**
samux 1:80ab0d068708 84 * Write a block of data.
samux 1:80ab0d068708 85 *
samux 1:80ab0d068708 86 * For more efficiency, a block of size 64 (maximum size of a bulk endpoint) has to be written.
samux 1:80ab0d068708 87 *
samux 1:80ab0d068708 88 * @param buf pointer on data which will be written
samux 1:80ab0d068708 89 * @param size size of the buffer. The maximum size of a block is limited by the size of the endpoint (64 bytes)
samux 1:80ab0d068708 90 *
samux 1:80ab0d068708 91 * @returns true if successfull
samux 1:80ab0d068708 92 */
samux 1:80ab0d068708 93 bool writeBlock(uint8_t * buf, uint16_t size);
samux 1:80ab0d068708 94
samux 1:80ab0d068708 95 /**
samux 1:80ab0d068708 96 * Attach a member function to call when a packet is received.
samux 1:80ab0d068708 97 *
samux 1:80ab0d068708 98 * @param tptr pointer to the object to call the member function on
samux 1:80ab0d068708 99 * @param mptr pointer to the member function to be called
samux 1:80ab0d068708 100 */
samux 1:80ab0d068708 101 template<typename T>
samux 1:80ab0d068708 102 void attach(T* tptr, void (T::*mptr)(void)) {
samux 1:80ab0d068708 103 if((mptr != NULL) && (tptr != NULL)) {
samux 1:80ab0d068708 104 rx.attach(tptr, mptr);
samux 1:80ab0d068708 105 }
samux 1:80ab0d068708 106 }
samux 1:80ab0d068708 107
samux 1:80ab0d068708 108 /**
samux 1:80ab0d068708 109 * Attach a callback called when a packet is received
samux 1:80ab0d068708 110 *
samux 1:80ab0d068708 111 * @param fptr function pointer
samux 1:80ab0d068708 112 */
samux 1:80ab0d068708 113 void attach(void (*fn)(void)) {
samux 1:80ab0d068708 114 if(fn != NULL) {
samux 1:80ab0d068708 115 rx.attach(fn);
samux 1:80ab0d068708 116 }
samux 1:80ab0d068708 117 }
samux 1:80ab0d068708 118
samux 1:80ab0d068708 119
samux 1:80ab0d068708 120 protected:
samux 1:80ab0d068708 121 virtual bool EP2_OUT_callback();
samux 1:80ab0d068708 122
samux 1:80ab0d068708 123 private:
samux 1:80ab0d068708 124 FunctionPointer rx;
samux 1:80ab0d068708 125 CircBuffer<uint8_t> buf;
samux 1:80ab0d068708 126 };
samux 1:80ab0d068708 127
samux 1:80ab0d068708 128 #endif