Mohit Tandon / Mbed 2 deprecated USBHost

USBHost

Dependencies:   FATFileSystem mbed-rtos mbed

Fork of USBHost by mbed official

USBHostSerial/USBHostSerial.cpp@0:a554658735bf, 2013-03-06 (annotated)

Committer:
mbed_official
Date:
Wed Mar 06 16:27:14 2013 +0000
Revision:
0:a554658735bf
Child:
4:b320d68e98e7
first commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:a554658735bf 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
mbed_official 0:a554658735bf 2 *
mbed_official 0:a554658735bf 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
mbed_official 0:a554658735bf 4 * and associated documentation files (the "Software"), to deal in the Software without
mbed_official 0:a554658735bf 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
mbed_official 0:a554658735bf 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
mbed_official 0:a554658735bf 7 * Software is furnished to do so, subject to the following conditions:
mbed_official 0:a554658735bf 8 *
mbed_official 0:a554658735bf 9 * The above copyright notice and this permission notice shall be included in all copies or
mbed_official 0:a554658735bf 10 * substantial portions of the Software.
mbed_official 0:a554658735bf 11 *
mbed_official 0:a554658735bf 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
mbed_official 0:a554658735bf 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
mbed_official 0:a554658735bf 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
mbed_official 0:a554658735bf 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mbed_official 0:a554658735bf 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
mbed_official 0:a554658735bf 17 */
mbed_official 0:a554658735bf 18
mbed_official 0:a554658735bf 19 #include "USBHostSerial.h"
mbed_official 0:a554658735bf 20
mbed_official 0:a554658735bf 21 #if USBHOST_SERIAL
mbed_official 0:a554658735bf 22
mbed_official 0:a554658735bf 23 #include "dbg.h"
mbed_official 0:a554658735bf 24
mbed_official 0:a554658735bf 25 USBHostSerial::USBHostSerial(): circ_buf() {
mbed_official 0:a554658735bf 26 host = USBHost::getHostInst();
mbed_official 0:a554658735bf 27 size_bulk_in = 0;
mbed_official 0:a554658735bf 28 size_bulk_out = 0;
mbed_official 0:a554658735bf 29 init();
mbed_official 0:a554658735bf 30 }
mbed_official 0:a554658735bf 31
mbed_official 0:a554658735bf 32 void USBHostSerial::init() {
mbed_official 0:a554658735bf 33 dev = NULL;
mbed_official 0:a554658735bf 34 bulk_in = NULL;
mbed_official 0:a554658735bf 35 bulk_out = NULL;
mbed_official 0:a554658735bf 36 dev_connected = false;
mbed_official 0:a554658735bf 37 serial_intf = -1;
mbed_official 0:a554658735bf 38 serial_device_found = false;
mbed_official 0:a554658735bf 39 }
mbed_official 0:a554658735bf 40
mbed_official 0:a554658735bf 41 bool USBHostSerial::connected()
mbed_official 0:a554658735bf 42 {
mbed_official 0:a554658735bf 43 return dev_connected;
mbed_official 0:a554658735bf 44 }
mbed_official 0:a554658735bf 45
mbed_official 0:a554658735bf 46 bool USBHostSerial::connect() {
mbed_official 0:a554658735bf 47
mbed_official 0:a554658735bf 48 if (dev_connected) {
mbed_official 0:a554658735bf 49 return true;
mbed_official 0:a554658735bf 50 }
mbed_official 0:a554658735bf 51 for (int i = 0; i < MAX_DEVICE_CONNECTED; i++) {
mbed_official 0:a554658735bf 52 if ((dev = host->getDevice(i)) != NULL) {
mbed_official 0:a554658735bf 53
mbed_official 0:a554658735bf 54 if(host->enumerate(dev, this))
mbed_official 0:a554658735bf 55 break;
mbed_official 0:a554658735bf 56
mbed_official 0:a554658735bf 57 if (serial_device_found) {
mbed_official 0:a554658735bf 58 bulk_in = dev->getEndpoint(serial_intf, BULK_ENDPOINT, IN);
mbed_official 0:a554658735bf 59 bulk_out = dev->getEndpoint(serial_intf, BULK_ENDPOINT, OUT);
mbed_official 0:a554658735bf 60
mbed_official 0:a554658735bf 61 if (!bulk_in || !bulk_out)
mbed_official 0:a554658735bf 62 break;
mbed_official 0:a554658735bf 63
mbed_official 0:a554658735bf 64 USB_INFO("New Serial device: VID:%04x PID:%04x [dev: %p]", dev->getVid(), dev->getPid(), dev);
mbed_official 0:a554658735bf 65 dev->setName("Serial");
mbed_official 0:a554658735bf 66 host->registerDriver(dev, serial_intf, this, &USBHostSerial::init);
mbed_official 0:a554658735bf 67
mbed_official 0:a554658735bf 68 size_bulk_in = bulk_in->getSize();
mbed_official 0:a554658735bf 69 size_bulk_out = bulk_out->getSize();
mbed_official 0:a554658735bf 70
mbed_official 0:a554658735bf 71 bulk_in->attach(this, &USBHostSerial::rxHandler);
mbed_official 0:a554658735bf 72 bulk_out->attach(this, &USBHostSerial::txHandler);
mbed_official 0:a554658735bf 73
mbed_official 0:a554658735bf 74 host->bulkRead(dev, bulk_in, buf, size_bulk_in, false);
mbed_official 0:a554658735bf 75 dev_connected = true;
mbed_official 0:a554658735bf 76 return true;
mbed_official 0:a554658735bf 77 }
mbed_official 0:a554658735bf 78 }
mbed_official 0:a554658735bf 79 }
mbed_official 0:a554658735bf 80 init();
mbed_official 0:a554658735bf 81 return false;
mbed_official 0:a554658735bf 82 }
mbed_official 0:a554658735bf 83
mbed_official 0:a554658735bf 84 void USBHostSerial::rxHandler() {
mbed_official 0:a554658735bf 85 if (bulk_in) {
mbed_official 0:a554658735bf 86 int len = bulk_in->getLengthTransferred();
mbed_official 0:a554658735bf 87 if (bulk_in->getState() == USB_TYPE_IDLE) {
mbed_official 0:a554658735bf 88 for (int i = 0; i < len; i++) {
mbed_official 0:a554658735bf 89 circ_buf.queue(buf[i]);
mbed_official 0:a554658735bf 90 }
mbed_official 0:a554658735bf 91 rx.call();
mbed_official 0:a554658735bf 92 }
mbed_official 0:a554658735bf 93 host->bulkRead(dev, bulk_in, buf, size_bulk_in, false);
mbed_official 0:a554658735bf 94 }
mbed_official 0:a554658735bf 95 }
mbed_official 0:a554658735bf 96
mbed_official 0:a554658735bf 97 void USBHostSerial::txHandler() {
mbed_official 0:a554658735bf 98 if (bulk_out) {
mbed_official 0:a554658735bf 99 if (bulk_out->getState() == USB_TYPE_IDLE) {
mbed_official 0:a554658735bf 100 tx.call();
mbed_official 0:a554658735bf 101 }
mbed_official 0:a554658735bf 102 }
mbed_official 0:a554658735bf 103 }
mbed_official 0:a554658735bf 104
mbed_official 0:a554658735bf 105 int USBHostSerial::_putc(int c) {
mbed_official 0:a554658735bf 106 if (bulk_out) {
mbed_official 0:a554658735bf 107 if (host->bulkWrite(dev, bulk_out, (uint8_t *)&c, 1) == USB_TYPE_OK) {
mbed_official 0:a554658735bf 108 return 1;
mbed_official 0:a554658735bf 109 }
mbed_official 0:a554658735bf 110 }
mbed_official 0:a554658735bf 111 return -1;
mbed_official 0:a554658735bf 112 }
mbed_official 0:a554658735bf 113
mbed_official 0:a554658735bf 114
mbed_official 0:a554658735bf 115 int USBHostSerial::_getc() {
mbed_official 0:a554658735bf 116 uint8_t c = 0;
mbed_official 0:a554658735bf 117 while ((bulk_in != NULL) && (circ_buf.isEmpty()));
mbed_official 0:a554658735bf 118 if (bulk_in == NULL) {
mbed_official 0:a554658735bf 119 return -1;
mbed_official 0:a554658735bf 120 }
mbed_official 0:a554658735bf 121 circ_buf.dequeue(&c);
mbed_official 0:a554658735bf 122 return c;
mbed_official 0:a554658735bf 123 }
mbed_official 0:a554658735bf 124
mbed_official 0:a554658735bf 125
mbed_official 0:a554658735bf 126 uint8_t USBHostSerial::available() {
mbed_official 0:a554658735bf 127 return circ_buf.available();
mbed_official 0:a554658735bf 128 }
mbed_official 0:a554658735bf 129
mbed_official 0:a554658735bf 130 /*virtual*/ void USBHostSerial::setVidPid(uint16_t vid, uint16_t pid)
mbed_official 0:a554658735bf 131 {
mbed_official 0:a554658735bf 132 // we don't check VID/PID for MSD driver
mbed_official 0:a554658735bf 133 }
mbed_official 0:a554658735bf 134
mbed_official 0:a554658735bf 135 /*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
mbed_official 0:a554658735bf 136 {
mbed_official 0:a554658735bf 137 if ((serial_intf == -1) &&
mbed_official 0:a554658735bf 138 (intf_class == SERIAL_CLASS) &&
mbed_official 0:a554658735bf 139 (intf_subclass == 0x00) &&
mbed_official 0:a554658735bf 140 (intf_protocol == 0x00)) {
mbed_official 0:a554658735bf 141 serial_intf = intf_nb;
mbed_official 0:a554658735bf 142 return true;
mbed_official 0:a554658735bf 143 }
mbed_official 0:a554658735bf 144 return false;
mbed_official 0:a554658735bf 145 }
mbed_official 0:a554658735bf 146
mbed_official 0:a554658735bf 147 /*virtual*/ bool USBHostSerial::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
mbed_official 0:a554658735bf 148 {
mbed_official 0:a554658735bf 149 if (intf_nb == serial_intf) {
mbed_official 0:a554658735bf 150 if (type == BULK_ENDPOINT) {
mbed_official 0:a554658735bf 151 serial_device_found = true;
mbed_official 0:a554658735bf 152 return true;
mbed_official 0:a554658735bf 153 }
mbed_official 0:a554658735bf 154 }
mbed_official 0:a554658735bf 155 return false;
mbed_official 0:a554658735bf 156 }
mbed_official 0:a554658735bf 157
mbed_official 0:a554658735bf 158 #endif
mbed_official 0:a554658735bf 159
mbed_official 0:a554658735bf 160