Diff: BaseUsbUartBridge.cpp

Revision:

0:9b1aa393acb3

Child:

1:3d02f8b77d68

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BaseUsbUartBridge.cpp	Mon May 12 15:53:39 2014 +0000
@@ -0,0 +1,59 @@
+#include "BaseUsbUartBridge.h"
+
+// http://mbed.org/handbook/USBSerial
+// http://mbed.org/media/uploads/samux/serial.zip
+
+BaseUsbUartBridge::BaseUsbUartBridge(PinName tx, PinName rx, int uart_buf_size, int usb_buf_size)
+    : SerialBase(tx, rx), USBCDC(0x1f00, 0x2012, 0x0001, true),
+    uart_buf(uart_buf_size), usb_buf(usb_buf_size)
+{
+    SerialBase::attach(this, &BaseUsbUartBridge::uart_handler, RxIrq);
+}
+
+void BaseUsbUartBridge::poll()
+{
+    uint8_t c;
+    int size = uart_buf.available();
+    if (size > 0) {
+        uint8_t buf[MAX_PACKET_SIZE_EPBULK];
+        if (size > sizeof(buf)) {
+            size = sizeof(buf);
+        }
+        for(int i = 0; i < size; i++) {
+            uart_buf.dequeue(&c);
+            buf[i] = c;
+            monitor(_UART, c);
+        }
+        if (terminal_connected) {
+            USBCDC::send(buf, size);
+        }
+    }
+    
+    if (usb_buf.dequeue(&c)) {
+        SerialBase::_base_putc(c);
+        monitor(_USB, c);
+    }
+}
+
+void BaseUsbUartBridge::uart_handler(void)
+{
+    uint8_t c = SerialBase::_base_getc();
+    uart_buf.queue(c);
+}
+
+bool BaseUsbUartBridge::bulk_callback()
+{
+    uint8_t c[65];
+    uint32_t size = 0;
+
+    //we read the packet received and put it on the circular buffer
+    readEP(c, &size);
+    for (uint32_t i = 0; i < size; i++) {
+        usb_buf.queue(c[i]);
+    }
+
+    // We reactivate the endpoint to receive next characters
+    readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
+    return true;    
+}
+