Add a working serial driver to usb stack. At the moment it simply echos back what it gets. You can test it on linux by

0) change relevant defines in usb_core.c
1) modprobe usbserial vendor=0x0781 product=0x7421 debug=1
2) picocom /dev/ttyUSB0
3) look at your logf screen if you build with logf support and enabled LOGF_ENABLE define in usb_serial.c
I also modified usb_core so that storage and serial both can make use the the 'usb_core'-thread. More will come :)


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15850 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 74 insertions, 0 deletions

diff --git a/firmware/usbstack/usb_serial.c b/firmware/usbstack/usb_serial.c
new file mode 100644
index 0000000..5513c56
--- /dev/null
+++ b/firmware/usbstack/usb_serial.c
@@ -0,0 +1,74 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id:  $
+ *
+ * Copyright (C) 2007 by Christian Gmeiner
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "system.h"
+#include "usb_core.h"
+#include "usb_drv.h"
+
+//#define LOGF_ENABLE
+#include "logf.h"
+
+static unsigned char _transfer_buffer[16];
+static unsigned char* transfer_buffer;
+
+/* called by usb_code_init() */
+void usb_serial_init(void)
+{
+    logf("serial: init");
+    transfer_buffer = (void*)UNCACHED_ADDR(&_transfer_buffer);
+}
+
+/* called by usb_core_transfer_complete() */
+void usb_serial_transfer_complete(int endpoint)
+{
+    switch (endpoint) {
+        case EP_RX:
+            logf("serial: %s", transfer_buffer);
+
+            /* re-prime endpoint */
+            usb_drv_recv(EP_RX, transfer_buffer, sizeof _transfer_buffer);
+
+            /* echo back :) */
+            usb_drv_send(EP_TX, transfer_buffer, sizeof transfer_buffer);
+            break;
+
+        case EP_TX:
+            break;
+    }
+}
+
+/* called by usb_core_control_request() */
+bool usb_serial_control_request(struct usb_ctrlrequest* req)
+{
+    /* note: interrupt context */
+
+    bool handled = false;
+    switch (req->bRequest) {
+        case USB_REQ_SET_CONFIGURATION:
+            logf("serial: set config");
+            /* prime rx endpoint */
+            usb_drv_recv(EP_RX, transfer_buffer, sizeof _transfer_buffer);
+            handled = true;
+            break;
+
+        default:
+            logf("serial: unhandeld req %d", req->bRequest);
+    }
+
+    return handled;
+}