USBSerial.cpp

00001 /* Copyright (c) 2010-2011 mbed.org, MIT License
00002 *
00003 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
00004 * and associated documentation files (the "Software"), to deal in the Software without
00005 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
00006 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
00007 * Software is furnished to do so, subject to the following conditions:
00008 *
00009 * The above copyright notice and this permission notice shall be included in all copies or
00010 * substantial portions of the Software.
00011 *
00012 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
00013 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00014 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
00015 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00016 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00017 */
00018 
00019 #include "stdint.h"
00020 #include "USBSerial.h"
00021 
00022 int USBSerial::_putc(int c) {
00023     if (!terminal_connected)
00024         return 0;
00025     send((uint8_t *)&c, 1);
00026     return 1;
00027 }
00028 
00029 int USBSerial::_getc() {
00030     uint8_t c = 0;
00031     while (buf.isEmpty());
00032     buf.dequeue(&c);
00033     return c;
00034 }
00035 
00036 
00037 bool USBSerial::writeBlock(uint8_t * buf, uint16_t size) {
00038     if(!terminal_connected) {
00039         return false;
00040     }
00041     if(size > MAX_PACKET_SIZE_EPBULK) {
00042         return false;
00043     }
00044     if(!send(buf, size)) {
00045         return false;
00046     }
00047     return true;
00048 }
00049 
00050 
00051 
00052 bool USBSerial::EPBULK_OUT_callback() {
00053     uint8_t c[65];
00054     uint32_t size = 0;
00055 
00056     //we read the packet received and put it on the circular buffer
00057     readEP(c, &size);
00058     for (uint32_t i = 0; i < size; i++) {
00059         buf.queue(c[i]);
00060     }
00061 
00062     // terminal must be connected now since we received packets
00063     if (size != 0) {
00064       terminal_connected = true;
00065     }
00066 
00067     //call a potential handler
00068     if (rx)
00069         rx.call();
00070 
00071     return true;
00072 }
00073 
00074 uint8_t USBSerial::available() {
00075     return buf.available();
00076 }