Diff: USBMSD2/USB_CDC.cpp

Revision:

1:cccfc461c61f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBMSD2/USB_CDC.cpp	Sun Feb 16 12:56:12 2014 +0000
@@ -0,0 +1,172 @@
+/* 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 "USB_CDC.h"
+
+#if (DEBUG2 > 3)
+#define CDC_DBG(...) do{fprintf(stderr,"[%s@%d] ",__PRETTY_FUNCTION__,__LINE__);fprintf(stderr,__VA_ARGS__);fprintf(stderr,"\r\n");} while(0);
+#define CDC_DBG_HEX(A,B) while(0);
+#else
+#define CDC_DBG(...) while(0)
+#define CDC_DBG_HEX(A,B) while(0)
+#endif
+
+#define CDC_SET_LINE_CODING        0x20
+#define CDC_GET_LINE_CODING        0x21
+#define CDC_SET_CONTROL_LINE_STATE 0x22
+#define CDC_SEND_BREAK             0x23
+
+#define MAX_CDC_REPORT_SIZE MAX_PACKET_SIZE_EPBULK
+
+USB_CDC::USB_CDC(USBDevice* device) : _device(device), _rx_buf(128)
+{
+    CDC_DBG("device=%p", device);
+
+    terminal_connected = false;
+    //USBDevice::connect();
+}
+
+void USB_CDC::putc(int c)
+{
+    if (terminal_connected) {
+        uint8_t buf[1];
+        buf[0] = c;
+        _device->write(CDC_EPBULK_IN, buf, sizeof(buf), MAX_CDC_REPORT_SIZE);
+    }
+}
+
+int USB_CDC::getc()
+{
+    uint8_t c = 0;
+    while (_rx_buf.isEmpty());
+    _rx_buf.dequeue(&c);
+    return c;
+}
+
+int USB_CDC::readable()
+{
+    return _rx_buf.available() > 0 ? 1 : 0;
+}
+
+int USB_CDC::writeable()
+{
+    return 1;
+}
+
+void USB_CDC::baud_callback(int baudrate)
+{
+    CDC_DBG("baudrate=%d", baudrate);
+}
+
+void USB_CDC::send_break_callback(uint16_t duration)
+{
+    CDC_DBG("duration=%04x", duration);
+}
+
+void USB_CDC::control_line_callback(int rts, int dtr)
+{
+    CDC_DBG("rts=%d, dtr=%d", rts, dtr);
+}
+
+bool USB_CDC::send(uint8_t * buffer, uint32_t size) {
+    return _device->write(CDC_EPBULK_IN, buffer, size, MAX_CDC_REPORT_SIZE);
+}
+
+bool USB_CDC::readEP(uint8_t * buffer, uint32_t * size) {
+    if (!_device->readEP(CDC_EPBULK_OUT, buffer, size, MAX_CDC_REPORT_SIZE))
+        return false;
+    if (!_device->readStart(CDC_EPBULK_OUT, MAX_CDC_REPORT_SIZE))
+        return false;
+    return true;
+}
+
+bool USB_CDC::readEP_NB(uint8_t * buffer, uint32_t * size) {
+    if (!_device->readEP_NB(CDC_EPBULK_OUT, buffer, size, MAX_CDC_REPORT_SIZE))
+        return false;
+    if (!_device->readStart(CDC_EPBULK_OUT, MAX_CDC_REPORT_SIZE))
+        return false;
+    return true;
+}
+
+bool USB_CDC::Request_callback(CONTROL_TRANSFER* transfer)
+{
+    static uint8_t cdc_line_coding[7]= {0x80, 0x25, 0x00, 0x00, 0x00, 0x00, 0x08};
+
+    if (transfer->setup.bmRequestType.Type == CLASS_TYPE) {
+        switch (transfer->setup.bRequest) {
+            case CDC_SET_LINE_CODING: // 0x20
+                transfer->remaining = 7;
+                transfer->notify = true;
+                terminal_connected = true;
+                return true;
+
+            case CDC_GET_LINE_CODING: // x021
+                transfer->remaining = 7;
+                transfer->ptr = cdc_line_coding;
+                transfer->direction = DEVICE_TO_HOST;
+                return true;
+
+            case CDC_SET_CONTROL_LINE_STATE: // 0x22
+                control_line_callback((transfer->setup.wValue>>1) & 1, (transfer->setup.wValue) & 1);
+                terminal_connected = false;
+                return true;
+            
+            case CDC_SEND_BREAK: // 0x23
+                send_break_callback(transfer->setup.wValue);
+                return true;
+        }
+    }
+    return false;
+}
+
+static uint32_t LD32(uint8_t* buf)
+{
+    return buf[0]|(buf[1]<<8)|(buf[2]<<16)|(buf[3]<<24);
+}
+
+bool USB_CDC::RequestCompleted_callback(CONTROL_TRANSFER* transfer, uint8_t* buf, int length)
+{
+    CDC_DBG("transer=%p", transfer);
+    int baudrate;
+    if (transfer->setup.bmRequestType.Type == CLASS_TYPE) {
+        switch (transfer->setup.bRequest) {
+            case CDC_SET_LINE_CODING: // 0x20
+                baudrate = LD32(buf);
+                baud_callback(baudrate);
+                return true;
+        }
+    }
+    CDC_DBG_HEX((uint8_t*)transfer, sizeof(CONTROL_TRANSFER));
+    return false;           
+}
+
+bool USB_CDC::EPBULK_OUT_callback() // virtual COM to target
+{
+    uint8_t buf[MAX_CDC_REPORT_SIZE];
+    uint32_t size = 0;
+    //we read the packet received and put it on the circular buffer
+    _device->readEP(CDC_EPBULK_OUT, buf, &size, MAX_CDC_REPORT_SIZE);
+    CDC_DBG("size=%d", size);
+    for(int i = 0; i < size; i++) {
+        _rx_buf.queue(buf[i]);
+    }
+
+    // We reactivate the endpoint to receive next characters
+    _device->readStart(CDC_EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
+    return true;
+}