Ales Povalac / USBDeviceLite

USB device stack, fixes for USBSerial, lightweight without malloc (RTOS ready)

Dependents:   EMIRv2

Fork of USBDevice by Ales Povalac

USBSerial/USBSerial.cpp@6:d0945750af57, 2012-12-20 (annotated)

Committer:
samux
Date:
Thu Dec 20 17:05:37 2012 +0000
Revision:
6:d0945750af57
Parent:
1:80ab0d068708
Child:
11:eeb3cbbaa996
USBSerial: detect when a terminal is connected

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 "USBSerial.h"
samux 1:80ab0d068708 21
samux 1:80ab0d068708 22 int USBSerial::_putc(int c) {
samux 6:d0945750af57 23 if (!terminal_connected)
samux 6:d0945750af57 24 return 0;
samux 1:80ab0d068708 25 send((uint8_t *)&c, 1);
samux 1:80ab0d068708 26 return 1;
samux 1:80ab0d068708 27 }
samux 1:80ab0d068708 28
samux 1:80ab0d068708 29 int USBSerial::_getc() {
samux 1:80ab0d068708 30 uint8_t c;
samux 1:80ab0d068708 31 while (buf.isEmpty());
samux 1:80ab0d068708 32 buf.dequeue(&c);
samux 1:80ab0d068708 33 return c;
samux 1:80ab0d068708 34 }
samux 1:80ab0d068708 35
samux 1:80ab0d068708 36
samux 1:80ab0d068708 37 bool USBSerial::writeBlock(uint8_t * buf, uint16_t size) {
samux 1:80ab0d068708 38 if(size > MAX_PACKET_SIZE_EPBULK) {
samux 1:80ab0d068708 39 return false;
samux 1:80ab0d068708 40 }
samux 1:80ab0d068708 41 if(!send(buf, size)) {
samux 1:80ab0d068708 42 return false;
samux 1:80ab0d068708 43 }
samux 1:80ab0d068708 44 return true;
samux 1:80ab0d068708 45 }
samux 1:80ab0d068708 46
samux 1:80ab0d068708 47
samux 1:80ab0d068708 48
samux 1:80ab0d068708 49 bool USBSerial::EP2_OUT_callback() {
samux 1:80ab0d068708 50 uint8_t c[65];
samux 1:80ab0d068708 51 uint32_t size = 0;
samux 1:80ab0d068708 52
samux 1:80ab0d068708 53 //we read the packet received and put it on the circular buffer
samux 1:80ab0d068708 54 readEP(c, &size);
samux 1:80ab0d068708 55 for (int i = 0; i < size; i++) {
samux 1:80ab0d068708 56 buf.queue(c[i]);
samux 1:80ab0d068708 57 }
samux 1:80ab0d068708 58
samux 1:80ab0d068708 59 //call a potential handler
samux 1:80ab0d068708 60 rx.call();
samux 1:80ab0d068708 61
samux 1:80ab0d068708 62 // We reactivate the endpoint to receive next characters
samux 1:80ab0d068708 63 readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
samux 1:80ab0d068708 64 return true;
samux 1:80ab0d068708 65 }
samux 1:80ab0d068708 66
samux 1:80ab0d068708 67 uint8_t USBSerial::available() {
samux 1:80ab0d068708 68 return buf.available();
samux 1:80ab0d068708 69 }