Diff: USBHostSerial/USBHostSerial.cpp

Revision:

0:a554658735bf

Child:

4:b320d68e98e7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBHostSerial/USBHostSerial.cpp	Wed Mar 06 16:27:14 2013 +0000
@@ -0,0 +1,160 @@
+/* Copyright (c) 2010-2011 mbed.org, MIT License
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+* and associated documentation files (the "Software"), to deal in the Software without
+* restriction, including without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in all copies or
+* substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include "USBHostSerial.h"
+
+#if USBHOST_SERIAL
+
+#include "dbg.h"
+
+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;
+}
+
+bool USBHostSerial::connected()
+{
+    return dev_connected;
+}
+
+bool USBHostSerial::connect() {
+
+    if (dev_connected) {
+        return true;
+    }
+    for (int i = 0; i < MAX_DEVICE_CONNECTED; i++) {
+        if ((dev = host->getDevice(i)) != NULL) {
+
+            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]", dev->getVid(), dev->getPid(), dev);
+                dev->setName("Serial");
+                host->registerDriver(dev, serial_intf, this, &USBHostSerial::init);
+                
+                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;
+}
+
+
+int USBHostSerial::_getc() {
+    uint8_t c = 0;
+    while ((bulk_in != NULL) && (circ_buf.isEmpty()));
+    if (bulk_in == NULL) {
+        return -1;
+    }
+    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
+
+