USBHost library for WAVE file player
Fork of USBHost by
USBHostSerial/USBHostSerial.cpp
- Committer:
- mbed_official
- Date:
- 2013-09-16
- Revision:
- 13:b58a2204422f
- Parent:
- 8:93da8ea2708b
- Child:
- 19:bd46ea19486b
File content as of revision 13:b58a2204422f:
/* mbed USBHost Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "USBHostSerial.h" #if USBHOST_SERIAL #include "dbg.h" #define SET_LINE_CODING 0x20 USBHostSerial::USBHostSerial(): circ_buf() { host = USBHost::getHostInst(); size_bulk_in = 0; size_bulk_out = 0; init(); } void USBHostSerial::init() { dev = NULL; bulk_in = NULL; bulk_out = NULL; dev_connected = false; serial_intf = -1; serial_device_found = false; line_coding.baudrate = 9600; line_coding.data_bits = 8; line_coding.parity = None; line_coding.stop_bits = 1; circ_buf.flush(); } bool USBHostSerial::connected() { return dev_connected; } bool USBHostSerial::connect() { if (dev_connected) { return true; } for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) { if ((dev = host->getDevice(i)) != NULL) { USB_DBG("Trying to connect serial device\r\n"); if(host->enumerate(dev, this)) break; if (serial_device_found) { bulk_in = dev->getEndpoint(serial_intf, BULK_ENDPOINT, IN); bulk_out = dev->getEndpoint(serial_intf, BULK_ENDPOINT, OUT); if (!bulk_in || !bulk_out) break; USB_INFO("New Serial device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, serial_intf); dev->setName("Serial", serial_intf); host->registerDriver(dev, serial_intf, this, &USBHostSerial::init); baud(9600); size_bulk_in = bulk_in->getSize(); size_bulk_out = bulk_out->getSize(); bulk_in->attach(this, &USBHostSerial::rxHandler); bulk_out->attach(this, &USBHostSerial::txHandler); host->bulkRead(dev, bulk_in, buf, size_bulk_in, false); dev_connected = true; return true; } } } init(); return false; } void USBHostSerial::rxHandler() { if (bulk_in) { int len = bulk_in->getLengthTransferred(); if (bulk_in->getState() == USB_TYPE_IDLE) { for (int i = 0; i < len; i++) { circ_buf.queue(buf[i]); } rx.call(); host->bulkRead(dev, bulk_in, buf, size_bulk_in, false); } } } void USBHostSerial::txHandler() { if (bulk_out) { if (bulk_out->getState() == USB_TYPE_IDLE) { tx.call(); } } } int USBHostSerial::_putc(int c) { if (bulk_out) { if (host->bulkWrite(dev, bulk_out, (uint8_t *)&c, 1) == USB_TYPE_OK) { return 1; } } return -1; } void USBHostSerial::baud(int baudrate) { line_coding.baudrate = baudrate; format(line_coding.data_bits, (Parity)line_coding.parity, line_coding.stop_bits); } void USBHostSerial::format(int bits, Parity parity, int stop_bits) { line_coding.data_bits = bits; line_coding.parity = parity; line_coding.stop_bits = (stop_bits == 1) ? 0 : 2; // set line coding host->controlWrite( dev, USB_RECIPIENT_INTERFACE | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_CLASS, SET_LINE_CODING, 0, serial_intf, (uint8_t *)&line_coding, 7); } int USBHostSerial::_getc() { uint8_t c = 0; if (bulk_in == NULL) { init(); return -1; } while (circ_buf.isEmpty()); circ_buf.dequeue(&c); return c; } uint8_t USBHostSerial::available() { return circ_buf.available(); } /*virtual*/ void USBHostSerial::setVidPid(uint16_t vid, uint16_t pid) { // we don't check VID/PID for MSD driver } /*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 { if ((serial_intf == -1) && (intf_class == SERIAL_CLASS) && (intf_subclass == 0x00) && (intf_protocol == 0x00)) { serial_intf = intf_nb; return true; } return false; } /*virtual*/ bool USBHostSerial::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used { if (intf_nb == serial_intf) { if (type == BULK_ENDPOINT) { serial_device_found = true; return true; } } return false; } #endif