joey shelton / LED_Demo

Dependencies:   MAX44000 PWM_Tone_Library nexpaq_mdk

Fork of LED_Demo by Maxim nexpaq

mbd_os/libraries/USBHost/USBHostSerial/USBHostSerial.cpp@1:55a6170b404f, 2016-09-17 (annotated)

Committer:
nexpaq
Date:
Sat Sep 17 16:32:05 2016 +0000
Revision:
1:55a6170b404f
checking in for sharing

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nexpaq 1:55a6170b404f 1 /* mbed USBHost Library
nexpaq 1:55a6170b404f 2 * Copyright (c) 2006-2013 ARM Limited
nexpaq 1:55a6170b404f 3 *
nexpaq 1:55a6170b404f 4 * Licensed under the Apache License, Version 2.0 (the "License");
nexpaq 1:55a6170b404f 5 * you may not use this file except in compliance with the License.
nexpaq 1:55a6170b404f 6 * You may obtain a copy of the License at
nexpaq 1:55a6170b404f 7 *
nexpaq 1:55a6170b404f 8 * http://www.apache.org/licenses/LICENSE-2.0
nexpaq 1:55a6170b404f 9 *
nexpaq 1:55a6170b404f 10 * Unless required by applicable law or agreed to in writing, software
nexpaq 1:55a6170b404f 11 * distributed under the License is distributed on an "AS IS" BASIS,
nexpaq 1:55a6170b404f 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nexpaq 1:55a6170b404f 13 * See the License for the specific language governing permissions and
nexpaq 1:55a6170b404f 14 * limitations under the License.
nexpaq 1:55a6170b404f 15 */
nexpaq 1:55a6170b404f 16
nexpaq 1:55a6170b404f 17 #include "USBHostSerial.h"
nexpaq 1:55a6170b404f 18
nexpaq 1:55a6170b404f 19 #if USBHOST_SERIAL
nexpaq 1:55a6170b404f 20
nexpaq 1:55a6170b404f 21 #include "dbg.h"
nexpaq 1:55a6170b404f 22
nexpaq 1:55a6170b404f 23 #define CHECK_INTERFACE(cls,subcls,proto) \
nexpaq 1:55a6170b404f 24 (((cls == 0xFF) && (subcls == 0xFF) && (proto == 0xFF)) /* QUALCOM CDC */ || \
nexpaq 1:55a6170b404f 25 ((cls == SERIAL_CLASS) && (subcls == 0x00) && (proto == 0x00)) /* STANDARD CDC */ )
nexpaq 1:55a6170b404f 26
nexpaq 1:55a6170b404f 27 #if (USBHOST_SERIAL <= 1)
nexpaq 1:55a6170b404f 28
nexpaq 1:55a6170b404f 29 USBHostSerial::USBHostSerial()
nexpaq 1:55a6170b404f 30 {
nexpaq 1:55a6170b404f 31 host = USBHost::getHostInst();
nexpaq 1:55a6170b404f 32 ports_found = 0;
nexpaq 1:55a6170b404f 33 dev_connected = false;
nexpaq 1:55a6170b404f 34 }
nexpaq 1:55a6170b404f 35
nexpaq 1:55a6170b404f 36 bool USBHostSerial::connected()
nexpaq 1:55a6170b404f 37 {
nexpaq 1:55a6170b404f 38 return dev_connected;
nexpaq 1:55a6170b404f 39 }
nexpaq 1:55a6170b404f 40
nexpaq 1:55a6170b404f 41 void USBHostSerial::disconnect(void)
nexpaq 1:55a6170b404f 42 {
nexpaq 1:55a6170b404f 43 ports_found = 0;
nexpaq 1:55a6170b404f 44 dev = NULL;
nexpaq 1:55a6170b404f 45 }
nexpaq 1:55a6170b404f 46
nexpaq 1:55a6170b404f 47 bool USBHostSerial::connect() {
nexpaq 1:55a6170b404f 48
nexpaq 1:55a6170b404f 49 if (dev)
nexpaq 1:55a6170b404f 50 {
nexpaq 1:55a6170b404f 51 for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++)
nexpaq 1:55a6170b404f 52 {
nexpaq 1:55a6170b404f 53 USBDeviceConnected* d = host->getDevice(i);
nexpaq 1:55a6170b404f 54 if (dev == d)
nexpaq 1:55a6170b404f 55 return true;
nexpaq 1:55a6170b404f 56 }
nexpaq 1:55a6170b404f 57 disconnect();
nexpaq 1:55a6170b404f 58 }
nexpaq 1:55a6170b404f 59 for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++)
nexpaq 1:55a6170b404f 60 {
nexpaq 1:55a6170b404f 61 USBDeviceConnected* d = host->getDevice(i);
nexpaq 1:55a6170b404f 62 if (d != NULL) {
nexpaq 1:55a6170b404f 63
nexpaq 1:55a6170b404f 64 USB_DBG("Trying to connect serial device \r\n");
nexpaq 1:55a6170b404f 65 if(host->enumerate(d, this))
nexpaq 1:55a6170b404f 66 break;
nexpaq 1:55a6170b404f 67
nexpaq 1:55a6170b404f 68 USBEndpoint* bulk_in = d->getEndpoint(port_intf, BULK_ENDPOINT, IN);
nexpaq 1:55a6170b404f 69 USBEndpoint* bulk_out = d->getEndpoint(port_intf, BULK_ENDPOINT, OUT);
nexpaq 1:55a6170b404f 70 if (bulk_in && bulk_out)
nexpaq 1:55a6170b404f 71 {
nexpaq 1:55a6170b404f 72 USBHostSerialPort::connect(host,d,port_intf,bulk_in, bulk_out);
nexpaq 1:55a6170b404f 73 dev = d;
nexpaq 1:55a6170b404f 74 dev_connected = true;
nexpaq 1:55a6170b404f 75 }
nexpaq 1:55a6170b404f 76 }
nexpaq 1:55a6170b404f 77 }
nexpaq 1:55a6170b404f 78 return dev != NULL;
nexpaq 1:55a6170b404f 79 }
nexpaq 1:55a6170b404f 80
nexpaq 1:55a6170b404f 81 /*virtual*/ void USBHostSerial::setVidPid(uint16_t vid, uint16_t pid)
nexpaq 1:55a6170b404f 82 {
nexpaq 1:55a6170b404f 83 // we don't check VID/PID for MSD driver
nexpaq 1:55a6170b404f 84 }
nexpaq 1:55a6170b404f 85
nexpaq 1:55a6170b404f 86 /*virtual*/ bool USBHostSerial::parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol) //Must return true if the interface should be parsed
nexpaq 1:55a6170b404f 87 {
nexpaq 1:55a6170b404f 88 if (!ports_found &&
nexpaq 1:55a6170b404f 89 CHECK_INTERFACE(intf_class, intf_subclass, intf_protocol)) {
nexpaq 1:55a6170b404f 90 port_intf = intf_nb;
nexpaq 1:55a6170b404f 91 ports_found = true;
nexpaq 1:55a6170b404f 92 return true;
nexpaq 1:55a6170b404f 93 }
nexpaq 1:55a6170b404f 94 return false;
nexpaq 1:55a6170b404f 95 }
nexpaq 1:55a6170b404f 96
nexpaq 1:55a6170b404f 97 /*virtual*/ bool USBHostSerial::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
nexpaq 1:55a6170b404f 98 {
nexpaq 1:55a6170b404f 99 if (ports_found && (intf_nb == port_intf)) {
nexpaq 1:55a6170b404f 100 if (type == BULK_ENDPOINT)
nexpaq 1:55a6170b404f 101 return true;
nexpaq 1:55a6170b404f 102 }
nexpaq 1:55a6170b404f 103 return false;
nexpaq 1:55a6170b404f 104 }
nexpaq 1:55a6170b404f 105
nexpaq 1:55a6170b404f 106 #else // (USBHOST_SERIAL > 1)
nexpaq 1:55a6170b404f 107
nexpaq 1:55a6170b404f 108 //------------------------------------------------------------------------------
nexpaq 1:55a6170b404f 109
nexpaq 1:55a6170b404f 110 USBHostMultiSerial::USBHostMultiSerial()
nexpaq 1:55a6170b404f 111 {
nexpaq 1:55a6170b404f 112 host = USBHost::getHostInst();
nexpaq 1:55a6170b404f 113 dev = NULL;
nexpaq 1:55a6170b404f 114 memset(ports, NULL, sizeof(ports));
nexpaq 1:55a6170b404f 115 ports_found = 0;
nexpaq 1:55a6170b404f 116 dev_connected = false;
nexpaq 1:55a6170b404f 117 }
nexpaq 1:55a6170b404f 118
nexpaq 1:55a6170b404f 119 USBHostMultiSerial::~USBHostMultiSerial()
nexpaq 1:55a6170b404f 120 {
nexpaq 1:55a6170b404f 121 disconnect();
nexpaq 1:55a6170b404f 122 }
nexpaq 1:55a6170b404f 123
nexpaq 1:55a6170b404f 124 bool USBHostMultiSerial::connected()
nexpaq 1:55a6170b404f 125 {
nexpaq 1:55a6170b404f 126 return dev_connected;
nexpaq 1:55a6170b404f 127 }
nexpaq 1:55a6170b404f 128
nexpaq 1:55a6170b404f 129 void USBHostMultiSerial::disconnect(void)
nexpaq 1:55a6170b404f 130 {
nexpaq 1:55a6170b404f 131 for (int port = 0; port < USBHOST_SERIAL; port ++)
nexpaq 1:55a6170b404f 132 {
nexpaq 1:55a6170b404f 133 if (ports[port])
nexpaq 1:55a6170b404f 134 {
nexpaq 1:55a6170b404f 135 delete ports[port];
nexpaq 1:55a6170b404f 136 ports[port] = NULL;
nexpaq 1:55a6170b404f 137 }
nexpaq 1:55a6170b404f 138 }
nexpaq 1:55a6170b404f 139 ports_found = 0;
nexpaq 1:55a6170b404f 140 dev = NULL;
nexpaq 1:55a6170b404f 141 }
nexpaq 1:55a6170b404f 142
nexpaq 1:55a6170b404f 143 bool USBHostMultiSerial::connect() {
nexpaq 1:55a6170b404f 144
nexpaq 1:55a6170b404f 145 if (dev)
nexpaq 1:55a6170b404f 146 {
nexpaq 1:55a6170b404f 147 for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++)
nexpaq 1:55a6170b404f 148 {
nexpaq 1:55a6170b404f 149 USBDeviceConnected* d = host->getDevice(i);
nexpaq 1:55a6170b404f 150 if (dev == d)
nexpaq 1:55a6170b404f 151 return true;
nexpaq 1:55a6170b404f 152 }
nexpaq 1:55a6170b404f 153 disconnect();
nexpaq 1:55a6170b404f 154 }
nexpaq 1:55a6170b404f 155 for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++)
nexpaq 1:55a6170b404f 156 {
nexpaq 1:55a6170b404f 157 USBDeviceConnected* d = host->getDevice(i);
nexpaq 1:55a6170b404f 158 if (d != NULL) {
nexpaq 1:55a6170b404f 159
nexpaq 1:55a6170b404f 160 USB_DBG("Trying to connect serial device \r\n");
nexpaq 1:55a6170b404f 161 if(host->enumerate(d, this))
nexpaq 1:55a6170b404f 162 break;
nexpaq 1:55a6170b404f 163
nexpaq 1:55a6170b404f 164 for (int port = 0; port < ports_found; port ++)
nexpaq 1:55a6170b404f 165 {
nexpaq 1:55a6170b404f 166 USBEndpoint* bulk_in = d->getEndpoint(port_intf[port], BULK_ENDPOINT, IN);
nexpaq 1:55a6170b404f 167 USBEndpoint* bulk_out = d->getEndpoint(port_intf[port], BULK_ENDPOINT, OUT);
nexpaq 1:55a6170b404f 168 if (bulk_in && bulk_out)
nexpaq 1:55a6170b404f 169 {
nexpaq 1:55a6170b404f 170 ports[port] = new USBHostSerialPort();
nexpaq 1:55a6170b404f 171 if (ports[port])
nexpaq 1:55a6170b404f 172 {
nexpaq 1:55a6170b404f 173 ports[port]->connect(host,d,port_intf[port],bulk_in, bulk_out);
nexpaq 1:55a6170b404f 174 dev = d;
nexpaq 1:55a6170b404f 175 dev_connected = true;
nexpaq 1:55a6170b404f 176 }
nexpaq 1:55a6170b404f 177 }
nexpaq 1:55a6170b404f 178 }
nexpaq 1:55a6170b404f 179 }
nexpaq 1:55a6170b404f 180 }
nexpaq 1:55a6170b404f 181 return dev != NULL;
nexpaq 1:55a6170b404f 182 }
nexpaq 1:55a6170b404f 183
nexpaq 1:55a6170b404f 184 /*virtual*/ void USBHostMultiSerial::setVidPid(uint16_t vid, uint16_t pid)
nexpaq 1:55a6170b404f 185 {
nexpaq 1:55a6170b404f 186 // we don't check VID/PID for MSD driver
nexpaq 1:55a6170b404f 187 }
nexpaq 1:55a6170b404f 188
nexpaq 1:55a6170b404f 189 /*virtual*/ bool USBHostMultiSerial::parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol) //Must return true if the interface should be parsed
nexpaq 1:55a6170b404f 190 {
nexpaq 1:55a6170b404f 191 if ((ports_found < USBHOST_SERIAL) &&
nexpaq 1:55a6170b404f 192 CHECK_INTERFACE(intf_class, intf_subclass, intf_protocol)) {
nexpaq 1:55a6170b404f 193 port_intf[ports_found++] = intf_nb;
nexpaq 1:55a6170b404f 194 return true;
nexpaq 1:55a6170b404f 195 }
nexpaq 1:55a6170b404f 196 return false;
nexpaq 1:55a6170b404f 197 }
nexpaq 1:55a6170b404f 198
nexpaq 1:55a6170b404f 199 /*virtual*/ bool USBHostMultiSerial::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
nexpaq 1:55a6170b404f 200 {
nexpaq 1:55a6170b404f 201 if ((ports_found > 0) && (intf_nb == port_intf[ports_found-1])) {
nexpaq 1:55a6170b404f 202 if (type == BULK_ENDPOINT)
nexpaq 1:55a6170b404f 203 return true;
nexpaq 1:55a6170b404f 204 }
nexpaq 1:55a6170b404f 205 return false;
nexpaq 1:55a6170b404f 206 }
nexpaq 1:55a6170b404f 207
nexpaq 1:55a6170b404f 208 #endif
nexpaq 1:55a6170b404f 209
nexpaq 1:55a6170b404f 210 //------------------------------------------------------------------------------
nexpaq 1:55a6170b404f 211
nexpaq 1:55a6170b404f 212 #define SET_LINE_CODING 0x20
nexpaq 1:55a6170b404f 213
nexpaq 1:55a6170b404f 214 USBHostSerialPort::USBHostSerialPort(): circ_buf()
nexpaq 1:55a6170b404f 215 {
nexpaq 1:55a6170b404f 216 init();
nexpaq 1:55a6170b404f 217 }
nexpaq 1:55a6170b404f 218
nexpaq 1:55a6170b404f 219 void USBHostSerialPort::init(void)
nexpaq 1:55a6170b404f 220 {
nexpaq 1:55a6170b404f 221 host = NULL;
nexpaq 1:55a6170b404f 222 dev = NULL;
nexpaq 1:55a6170b404f 223 serial_intf = NULL;
nexpaq 1:55a6170b404f 224 size_bulk_in = 0;
nexpaq 1:55a6170b404f 225 size_bulk_out = 0;
nexpaq 1:55a6170b404f 226 bulk_in = NULL;
nexpaq 1:55a6170b404f 227 bulk_out = NULL;
nexpaq 1:55a6170b404f 228 line_coding.baudrate = 9600;
nexpaq 1:55a6170b404f 229 line_coding.data_bits = 8;
nexpaq 1:55a6170b404f 230 line_coding.parity = None;
nexpaq 1:55a6170b404f 231 line_coding.stop_bits = 1;
nexpaq 1:55a6170b404f 232 circ_buf.flush();
nexpaq 1:55a6170b404f 233 }
nexpaq 1:55a6170b404f 234
nexpaq 1:55a6170b404f 235 void USBHostSerialPort::connect(USBHost* _host, USBDeviceConnected * _dev,
nexpaq 1:55a6170b404f 236 uint8_t _serial_intf, USBEndpoint* _bulk_in, USBEndpoint* _bulk_out)
nexpaq 1:55a6170b404f 237 {
nexpaq 1:55a6170b404f 238 host = _host;
nexpaq 1:55a6170b404f 239 dev = _dev;
nexpaq 1:55a6170b404f 240 serial_intf = _serial_intf;
nexpaq 1:55a6170b404f 241 bulk_in = _bulk_in;
nexpaq 1:55a6170b404f 242 bulk_out = _bulk_out;
nexpaq 1:55a6170b404f 243
nexpaq 1:55a6170b404f 244 USB_INFO("New Serial device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, serial_intf);
nexpaq 1:55a6170b404f 245 dev->setName("Serial", serial_intf);
nexpaq 1:55a6170b404f 246 host->registerDriver(dev, serial_intf, this, &USBHostSerialPort::init);
nexpaq 1:55a6170b404f 247 baud(9600);
nexpaq 1:55a6170b404f 248 size_bulk_in = bulk_in->getSize();
nexpaq 1:55a6170b404f 249 size_bulk_out = bulk_out->getSize();
nexpaq 1:55a6170b404f 250 bulk_in->attach(this, &USBHostSerialPort::rxHandler);
nexpaq 1:55a6170b404f 251 bulk_out->attach(this, &USBHostSerialPort::txHandler);
nexpaq 1:55a6170b404f 252 host->bulkRead(dev, bulk_in, buf, size_bulk_in, false);
nexpaq 1:55a6170b404f 253 }
nexpaq 1:55a6170b404f 254
nexpaq 1:55a6170b404f 255 void USBHostSerialPort::rxHandler() {
nexpaq 1:55a6170b404f 256 if (bulk_in) {
nexpaq 1:55a6170b404f 257 int len = bulk_in->getLengthTransferred();
nexpaq 1:55a6170b404f 258 if (bulk_in->getState() == USB_TYPE_IDLE) {
nexpaq 1:55a6170b404f 259 for (int i = 0; i < len; i++) {
nexpaq 1:55a6170b404f 260 circ_buf.queue(buf[i]);
nexpaq 1:55a6170b404f 261 }
nexpaq 1:55a6170b404f 262 rx.call();
nexpaq 1:55a6170b404f 263 host->bulkRead(dev, bulk_in, buf, size_bulk_in, false);
nexpaq 1:55a6170b404f 264 }
nexpaq 1:55a6170b404f 265 }
nexpaq 1:55a6170b404f 266 }
nexpaq 1:55a6170b404f 267
nexpaq 1:55a6170b404f 268 void USBHostSerialPort::txHandler() {
nexpaq 1:55a6170b404f 269 if (bulk_out) {
nexpaq 1:55a6170b404f 270 if (bulk_out->getState() == USB_TYPE_IDLE) {
nexpaq 1:55a6170b404f 271 tx.call();
nexpaq 1:55a6170b404f 272 }
nexpaq 1:55a6170b404f 273 }
nexpaq 1:55a6170b404f 274 }
nexpaq 1:55a6170b404f 275
nexpaq 1:55a6170b404f 276 int USBHostSerialPort::_putc(int c) {
nexpaq 1:55a6170b404f 277 if (bulk_out) {
nexpaq 1:55a6170b404f 278 if (host->bulkWrite(dev, bulk_out, (uint8_t *)&c, 1) == USB_TYPE_OK) {
nexpaq 1:55a6170b404f 279 return 1;
nexpaq 1:55a6170b404f 280 }
nexpaq 1:55a6170b404f 281 }
nexpaq 1:55a6170b404f 282 return -1;
nexpaq 1:55a6170b404f 283 }
nexpaq 1:55a6170b404f 284
nexpaq 1:55a6170b404f 285 void USBHostSerialPort::baud(int baudrate) {
nexpaq 1:55a6170b404f 286 line_coding.baudrate = baudrate;
nexpaq 1:55a6170b404f 287 format(line_coding.data_bits, (Parity)line_coding.parity, line_coding.stop_bits);
nexpaq 1:55a6170b404f 288 }
nexpaq 1:55a6170b404f 289
nexpaq 1:55a6170b404f 290 void USBHostSerialPort::format(int bits, Parity parity, int stop_bits) {
nexpaq 1:55a6170b404f 291 line_coding.data_bits = bits;
nexpaq 1:55a6170b404f 292 line_coding.parity = parity;
nexpaq 1:55a6170b404f 293 line_coding.stop_bits = (stop_bits == 1) ? 0 : 2;
nexpaq 1:55a6170b404f 294
nexpaq 1:55a6170b404f 295 // set line coding
nexpaq 1:55a6170b404f 296 host->controlWrite( dev,
nexpaq 1:55a6170b404f 297 USB_RECIPIENT_INTERFACE | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_CLASS,
nexpaq 1:55a6170b404f 298 SET_LINE_CODING,
nexpaq 1:55a6170b404f 299 0, serial_intf, (uint8_t *)&line_coding, 7);
nexpaq 1:55a6170b404f 300 }
nexpaq 1:55a6170b404f 301
nexpaq 1:55a6170b404f 302 int USBHostSerialPort::_getc() {
nexpaq 1:55a6170b404f 303 uint8_t c = 0;
nexpaq 1:55a6170b404f 304 if (bulk_in == NULL) {
nexpaq 1:55a6170b404f 305 init();
nexpaq 1:55a6170b404f 306 return -1;
nexpaq 1:55a6170b404f 307 }
nexpaq 1:55a6170b404f 308 while (circ_buf.isEmpty());
nexpaq 1:55a6170b404f 309 circ_buf.dequeue(&c);
nexpaq 1:55a6170b404f 310 return c;
nexpaq 1:55a6170b404f 311 }
nexpaq 1:55a6170b404f 312
nexpaq 1:55a6170b404f 313 int USBHostSerialPort::writeBuf(const char* b, int s)
nexpaq 1:55a6170b404f 314 {
nexpaq 1:55a6170b404f 315 int c = 0;
nexpaq 1:55a6170b404f 316 if (bulk_out)
nexpaq 1:55a6170b404f 317 {
nexpaq 1:55a6170b404f 318 while (c < s)
nexpaq 1:55a6170b404f 319 {
nexpaq 1:55a6170b404f 320 int i = (s < size_bulk_out) ? s : size_bulk_out;
nexpaq 1:55a6170b404f 321 if (host->bulkWrite(dev, bulk_out, (uint8_t *)(b+c), i) == USB_TYPE_OK)
nexpaq 1:55a6170b404f 322 c += i;
nexpaq 1:55a6170b404f 323 }
nexpaq 1:55a6170b404f 324 }
nexpaq 1:55a6170b404f 325 return s;
nexpaq 1:55a6170b404f 326 }
nexpaq 1:55a6170b404f 327
nexpaq 1:55a6170b404f 328 int USBHostSerialPort::readBuf(char* b, int s)
nexpaq 1:55a6170b404f 329 {
nexpaq 1:55a6170b404f 330 int i = 0;
nexpaq 1:55a6170b404f 331 if (bulk_in)
nexpaq 1:55a6170b404f 332 {
nexpaq 1:55a6170b404f 333 for (i = 0; i < s; )
nexpaq 1:55a6170b404f 334 b[i++] = getc();
nexpaq 1:55a6170b404f 335 }
nexpaq 1:55a6170b404f 336 return i;
nexpaq 1:55a6170b404f 337 }
nexpaq 1:55a6170b404f 338
nexpaq 1:55a6170b404f 339 uint8_t USBHostSerialPort::available() {
nexpaq 1:55a6170b404f 340 return circ_buf.available();
nexpaq 1:55a6170b404f 341 }
nexpaq 1:55a6170b404f 342
nexpaq 1:55a6170b404f 343
nexpaq 1:55a6170b404f 344
nexpaq 1:55a6170b404f 345 #endif