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.

USBMIDI/USBMIDI.cpp@24:4ed3e25c3edc, 2014-03-30 (annotated)

Committer:
tolaipner
Date:
Sun Mar 30 07:30:18 2014 +0000
Revision:
24:4ed3e25c3edc
Parent:
11:eeb3cbbaa996 
Added Nucleo F401RE support

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 #include "stdint.h"
samux 1:80ab0d068708 20 #include "USBMIDI.h"
samux 1:80ab0d068708 21
samux 1:80ab0d068708 22
samux 1:80ab0d068708 23 USBMIDI::USBMIDI(uint16_t vendor_id, uint16_t product_id, uint16_t product_release): USBDevice(vendor_id, product_id, product_release) {
samux 1:80ab0d068708 24 midi_evt = NULL;
samux 1:80ab0d068708 25 USBDevice::connect();
samux 1:80ab0d068708 26 }
samux 1:80ab0d068708 27
samux 1:80ab0d068708 28 void USBMIDI::write(MIDIMessage m) {
samux 1:80ab0d068708 29 USBDevice::write(EPBULK_IN, m.data, 4, MAX_PACKET_SIZE_EPBULK);
samux 1:80ab0d068708 30 }
samux 1:80ab0d068708 31
samux 1:80ab0d068708 32
samux 1:80ab0d068708 33 void USBMIDI::attach(void (*fptr)(MIDIMessage)) {
samux 1:80ab0d068708 34 midi_evt = fptr;
samux 1:80ab0d068708 35 }
samux 1:80ab0d068708 36
samux 1:80ab0d068708 37
samux 1:80ab0d068708 38 bool USBMIDI::EP2_OUT_callback() {
samux 1:80ab0d068708 39 uint8_t buf[64];
samux 1:80ab0d068708 40 uint32_t len;
samux 1:80ab0d068708 41 readEP(EPBULK_OUT, buf, &len, 64);
samux 1:80ab0d068708 42
samux 1:80ab0d068708 43 if (midi_evt != NULL) {
bogdanm 11:eeb3cbbaa996 44 for (uint32_t i=0; i<len; i+=4) {
samux 1:80ab0d068708 45 midi_evt(MIDIMessage(buf+i));
samux 1:80ab0d068708 46 }
samux 1:80ab0d068708 47 }
samux 1:80ab0d068708 48
samux 1:80ab0d068708 49 // We reactivate the endpoint to receive next characters
samux 1:80ab0d068708 50 readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
samux 1:80ab0d068708 51 return true;
samux 1:80ab0d068708 52 }
samux 1:80ab0d068708 53
samux 1:80ab0d068708 54
samux 1:80ab0d068708 55
samux 1:80ab0d068708 56 // Called in ISR context
samux 1:80ab0d068708 57 // Set configuration. Return false if the
samux 1:80ab0d068708 58 // configuration is not supported.
samux 1:80ab0d068708 59 bool USBMIDI::USBCallback_setConfiguration(uint8_t configuration) {
samux 1:80ab0d068708 60 if (configuration != DEFAULT_CONFIGURATION) {
samux 1:80ab0d068708 61 return false;
samux 1:80ab0d068708 62 }
samux 1:80ab0d068708 63
samux 1:80ab0d068708 64 // Configure endpoints > 0
samux 1:80ab0d068708 65 addEndpoint(EPBULK_IN, MAX_PACKET_SIZE_EPBULK);
samux 1:80ab0d068708 66 addEndpoint(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
samux 1:80ab0d068708 67
samux 1:80ab0d068708 68 // We activate the endpoint to be able to receive data
samux 1:80ab0d068708 69 readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
samux 1:80ab0d068708 70 return true;
samux 1:80ab0d068708 71 }
samux 1:80ab0d068708 72
samux 1:80ab0d068708 73
samux 1:80ab0d068708 74 uint8_t * USBMIDI::stringIinterfaceDesc() {
samux 1:80ab0d068708 75 static uint8_t stringIinterfaceDescriptor[] = {
samux 1:80ab0d068708 76 0x0c, //bLength
samux 1:80ab0d068708 77 STRING_DESCRIPTOR, //bDescriptorType 0x03
samux 1:80ab0d068708 78 'A',0,'u',0,'d',0,'i',0,'o',0 //bString iInterface - Audio
samux 1:80ab0d068708 79 };
samux 1:80ab0d068708 80 return stringIinterfaceDescriptor;
samux 1:80ab0d068708 81 }
samux 1:80ab0d068708 82
samux 1:80ab0d068708 83 uint8_t * USBMIDI::stringIproductDesc() {
samux 1:80ab0d068708 84 static uint8_t stringIproductDescriptor[] = {
samux 1:80ab0d068708 85 0x16, //bLength
samux 1:80ab0d068708 86 STRING_DESCRIPTOR, //bDescriptorType 0x03
samux 1:80ab0d068708 87 'M',0,'b',0,'e',0,'d',0,' ',0,'A',0,'u',0,'d',0,'i',0,'o',0 //bString iProduct - Mbed Audio
samux 1:80ab0d068708 88 };
samux 1:80ab0d068708 89 return stringIproductDescriptor;
samux 1:80ab0d068708 90 }
samux 1:80ab0d068708 91
samux 1:80ab0d068708 92
samux 1:80ab0d068708 93 uint8_t * USBMIDI::configurationDesc() {
samux 1:80ab0d068708 94 static uint8_t configDescriptor[] = {
samux 1:80ab0d068708 95 // configuration descriptor
samux 1:80ab0d068708 96 0x09, 0x02, 0x65, 0x00, 0x02, 0x01, 0x00, 0xc0, 0x50,
samux 1:80ab0d068708 97
samux 1:80ab0d068708 98 // The Audio Interface Collection
samux 1:80ab0d068708 99 0x09, 0x04, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, // Standard AC Interface Descriptor
samux 1:80ab0d068708 100 0x09, 0x24, 0x01, 0x00, 0x01, 0x09, 0x00, 0x01, 0x01, // Class-specific AC Interface Descriptor
samux 1:80ab0d068708 101 0x09, 0x04, 0x01, 0x00, 0x02, 0x01, 0x03, 0x00, 0x00, // MIDIStreaming Interface Descriptors
samux 1:80ab0d068708 102 0x07, 0x24, 0x01, 0x00, 0x01, 0x41, 0x00, // Class-Specific MS Interface Header Descriptor
samux 1:80ab0d068708 103
samux 1:80ab0d068708 104 // MIDI IN JACKS
samux 1:80ab0d068708 105 0x06, 0x24, 0x02, 0x01, 0x01, 0x00,
samux 1:80ab0d068708 106 0x06, 0x24, 0x02, 0x02, 0x02, 0x00,
samux 1:80ab0d068708 107
samux 1:80ab0d068708 108 // MIDI OUT JACKS
samux 1:80ab0d068708 109 0x09, 0x24, 0x03, 0x01, 0x03, 0x01, 0x02, 0x01, 0x00,
samux 1:80ab0d068708 110 0x09, 0x24, 0x03, 0x02, 0x06, 0x01, 0x01, 0x01, 0x00,
samux 1:80ab0d068708 111
samux 1:80ab0d068708 112 // OUT endpoint descriptor
samux 1:80ab0d068708 113 0x09, 0x05, 0x02, 0x02, 0x40, 0x00, 0x00, 0x00, 0x00,
samux 1:80ab0d068708 114 0x05, 0x25, 0x01, 0x01, 0x01,
samux 1:80ab0d068708 115
samux 1:80ab0d068708 116 // IN endpoint descriptor
samux 1:80ab0d068708 117 0x09, 0x05, 0x82, 0x02, 0x40, 0x00, 0x00, 0x00, 0x00,
samux 1:80ab0d068708 118 0x05, 0x25, 0x01, 0x01, 0x03,
samux 1:80ab0d068708 119 };
samux 1:80ab0d068708 120 return configDescriptor;
samux 1:80ab0d068708 121 }