Diff: USBHostSerial/USBHostSerial.cpp

Revision:

1:ab240722d7ef

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBHostSerial/USBHostSerial.cpp	Wed Feb 15 10:49:44 2017 +0100
@@ -0,0 +1,345 @@
+/* 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 CHECK_INTERFACE(cls,subcls,proto) \
+        (((cls == 0xFF)         && (subcls == 0xFF) && (proto == 0xFF)) /* QUALCOM CDC */  || \
+         ((cls == SERIAL_CLASS) && (subcls == 0x00) && (proto == 0x00)) /* STANDARD CDC */ )
+
+#if (USBHOST_SERIAL <= 1)
+
+USBHostSerial::USBHostSerial()
+{
+    host = USBHost::getHostInst();
+    ports_found = 0;
+    dev_connected = false;
+}
+
+bool USBHostSerial::connected()
+{
+    return dev_connected;
+}
+
+void USBHostSerial::disconnect(void)
+{
+    ports_found = 0;
+    dev = NULL;
+}
+
+bool USBHostSerial::connect() {
+
+    if (dev)
+    {
+        for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++)
+        {
+            USBDeviceConnected* d = host->getDevice(i);
+            if (dev == d)
+                return true;
+        }
+        disconnect();
+    }
+    for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++)
+    {
+        USBDeviceConnected* d = host->getDevice(i);
+        if (d != NULL) {
+
+            USB_DBG("Trying to connect serial device \r\n");
+            if(host->enumerate(d, this))
+                break;
+
+            USBEndpoint* bulk_in  = d->getEndpoint(port_intf, BULK_ENDPOINT, IN);
+            USBEndpoint* bulk_out = d->getEndpoint(port_intf, BULK_ENDPOINT, OUT);
+            if (bulk_in && bulk_out)
+            {
+                USBHostSerialPort::connect(host,d,port_intf,bulk_in, bulk_out);
+                dev = d;
+                dev_connected = true;
+            }
+        }
+    }
+    return dev != NULL;
+}
+
+/*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 (!ports_found &&
+        CHECK_INTERFACE(intf_class, intf_subclass, intf_protocol)) {
+        port_intf = intf_nb;
+        ports_found = true;
+        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 (ports_found && (intf_nb == port_intf)) {
+        if (type == BULK_ENDPOINT)
+            return true;
+    }
+    return false;
+}
+
+#else // (USBHOST_SERIAL > 1)
+
+//------------------------------------------------------------------------------
+
+USBHostMultiSerial::USBHostMultiSerial()
+{
+    host = USBHost::getHostInst();
+    dev = NULL;
+    memset(ports, NULL, sizeof(ports));
+    ports_found = 0;
+    dev_connected = false;
+}
+
+USBHostMultiSerial::~USBHostMultiSerial()
+{
+    disconnect();
+}
+
+bool USBHostMultiSerial::connected()
+{
+    return dev_connected;
+}
+
+void USBHostMultiSerial::disconnect(void)
+{
+    for (int port = 0; port < USBHOST_SERIAL; port ++)
+    {
+        if (ports[port])
+        {
+            delete ports[port];
+            ports[port] = NULL;
+        }
+    }
+    ports_found = 0;
+    dev = NULL;
+}
+
+bool USBHostMultiSerial::connect() {
+
+    if (dev)
+    {
+        for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++)
+        {
+            USBDeviceConnected* d = host->getDevice(i);
+            if (dev == d)
+                return true;
+        }
+        disconnect();
+    }
+    for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++)
+    {
+        USBDeviceConnected* d = host->getDevice(i);
+        if (d != NULL) {
+
+            USB_DBG("Trying to connect serial device \r\n");
+            if(host->enumerate(d, this))
+                break;
+
+            for (int port = 0; port < ports_found; port ++)
+            {
+                USBEndpoint* bulk_in  = d->getEndpoint(port_intf[port], BULK_ENDPOINT, IN);
+                USBEndpoint* bulk_out = d->getEndpoint(port_intf[port], BULK_ENDPOINT, OUT);
+                if (bulk_in && bulk_out)
+                {
+                    ports[port] = new USBHostSerialPort();
+                    if (ports[port])
+                    {
+                        ports[port]->connect(host,d,port_intf[port],bulk_in, bulk_out);
+                        dev = d;
+                        dev_connected = true;
+                    }
+                }
+            }
+        }
+    }
+    return dev != NULL;
+}
+
+/*virtual*/ void USBHostMultiSerial::setVidPid(uint16_t vid, uint16_t pid)
+{
+    // we don't check VID/PID for MSD driver
+}
+
+/*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
+{
+    if ((ports_found < USBHOST_SERIAL) &&
+        CHECK_INTERFACE(intf_class, intf_subclass, intf_protocol)) {
+        port_intf[ports_found++] = intf_nb;
+        return true;
+    }
+    return false;
+}
+
+/*virtual*/ bool USBHostMultiSerial::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
+{
+    if ((ports_found > 0) && (intf_nb == port_intf[ports_found-1])) {
+        if (type == BULK_ENDPOINT)
+            return true;
+    }
+    return false;
+}
+
+#endif
+
+//------------------------------------------------------------------------------
+
+#define SET_LINE_CODING 0x20
+
+USBHostSerialPort::USBHostSerialPort(): circ_buf()
+{
+    init();
+}
+
+void USBHostSerialPort::init(void)
+{
+    host = NULL;
+    dev = NULL;
+    serial_intf = NULL;
+    size_bulk_in = 0;
+    size_bulk_out = 0;
+    bulk_in = NULL;
+    bulk_out = NULL;
+    line_coding.baudrate = 9600;
+    line_coding.data_bits = 8;
+    line_coding.parity = None;
+    line_coding.stop_bits = 1;
+    circ_buf.flush();
+}
+
+void USBHostSerialPort::connect(USBHost* _host, USBDeviceConnected * _dev,
+        uint8_t _serial_intf, USBEndpoint* _bulk_in, USBEndpoint* _bulk_out)
+{
+    host = _host;
+    dev = _dev;
+    serial_intf = _serial_intf;
+    bulk_in = _bulk_in;
+    bulk_out = _bulk_out;
+
+    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, &USBHostSerialPort::init);
+    baud(9600);
+    size_bulk_in = bulk_in->getSize();
+    size_bulk_out = bulk_out->getSize();
+    bulk_in->attach(this, &USBHostSerialPort::rxHandler);
+    bulk_out->attach(this, &USBHostSerialPort::txHandler);
+    host->bulkRead(dev, bulk_in, buf, size_bulk_in, false);
+}
+
+void USBHostSerialPort::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 USBHostSerialPort::txHandler() {
+    if (bulk_out) {
+        if (bulk_out->getState() == USB_TYPE_IDLE) {
+            tx.call();
+        }
+    }
+}
+
+int USBHostSerialPort::_putc(int c) {
+    if (bulk_out) {
+        if (host->bulkWrite(dev, bulk_out, (uint8_t *)&c, 1) == USB_TYPE_OK) {
+            return 1;
+        }
+    }
+    return -1;
+}
+
+void USBHostSerialPort::baud(int baudrate) {
+    line_coding.baudrate = baudrate;
+    format(line_coding.data_bits, (Parity)line_coding.parity, line_coding.stop_bits);
+}
+
+void USBHostSerialPort::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 USBHostSerialPort::_getc() {
+    uint8_t c = 0;
+    if (bulk_in == NULL) {
+        init();
+        return -1;
+    }
+    while (circ_buf.isEmpty());
+    circ_buf.dequeue(&c);
+    return c;
+}
+
+int USBHostSerialPort::writeBuf(const char* b, int s)
+{
+    int c = 0;
+    if (bulk_out)
+    {
+        while (c < s)
+        {
+            int i = (s < size_bulk_out) ? s : size_bulk_out;
+            if (host->bulkWrite(dev, bulk_out, (uint8_t *)(b+c), i) == USB_TYPE_OK)
+                c += i;
+        }
+    }
+    return s;
+}
+
+int USBHostSerialPort::readBuf(char* b, int s)
+{
+    int i = 0;
+    if (bulk_in)
+    {
+        for (i = 0; i < s; )
+            b[i++] = getc();
+    }
+    return i;
+}
+
+uint8_t USBHostSerialPort::available() {
+    return circ_buf.available();
+}
+
+
+
+#endif