1 files changed, 96 insertions, 0 deletions
diff --git a/core/comm/HardwareUsb.cpp b/core/comm/HardwareUsb.cpp
new file mode 100644
index 0000000..269a68f
--- /dev/null
+++ b/core/comm/HardwareUsb.cpp
@@ -0,0 +1,96 @@
+/* *****************************************************************************
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ****************************************************************************/
+
+/**
+ *  @file HardwareUsb.cpp
+ *
+ *  @brief Wiring like serial api to USB virtual COM
+ */
+
+#include "wiring.h"
+#include "HardwareUsb.h"
+#include "bootVect.h"
+#include "usb.h"
+
+HardwareUsb::HardwareUsb(void) {
+  mapleVectTable = (BootVectTable*)(BOOTLOADER_VECT_TABLE);
+  mapleVectTable->serial_tx_cb = usb_tx_cb;
+  mapleVectTable->serial_rx_cb = usb_rx_cb;
+  mapleVectTable->usb_local_obj_ptr = this;
+  rx_buffer_offset_in = 0;
+  rx_buffer_offset_out = 0;
+}
+
+uint8_t HardwareUsb::read(void) {
+  uint8_t outVal = rx_buffer[rx_buffer_offset_out++];
+
+#if 1
+  if (rx_buffer_offset_out == rx_buffer_offset_in) {
+    flush();
+  }
+#endif
+
+  return outVal;
+}
+
+uint8_t HardwareUsb::available(void) {
+  ASSERT(rx_buffer_offset_out >= 0);
+  //  return rx_buffer_offset+1;
+  //  return usb_serialGetRecvLen();
+  return rx_buffer_offset_in - rx_buffer_offset_out;
+}
+
+void HardwareUsb::flush(void) {
+  rx_buffer_offset_in = 0;
+  rx_buffer_offset_out = 0;
+}
+
+void HardwareUsb::write(unsigned char ch) {
+  usb_serialWriteChar(ch);
+}
+
+void HardwareUsb::begin(void) {
+  /* placeholder for usb<->uart linking */
+}
+
+void HardwareUsb::usb_rx_cb(void) {
+   BootVectTable *vectTable = (BootVectTable*)(BOOTLOADER_VECT_TABLE);
+   HardwareUsb *thisPtr = (HardwareUsb*) vectTable->usb_local_obj_ptr;
+
+   uint8_t numBytes = usb_serialGetRecvLen();
+
+#if 0
+   /* ONE-SHOT-TO-READ Version (buffer cleared on next recv interrupt */
+   usb_copyRecvBuffer(thisPtr->rx_buffer,numBytes);
+   thisPtr->rx_buffer_offset_in = numBytes;
+   thisPtr->rx_buffer_offset_out = 0;
+#else 
+  /* FIFO DISCARD OVERFLOW VERSION */
+  if ((thisPtr->rx_buffer_offset_in + numBytes) > (USB_SERIAL_BUF_SIZE)) {
+    numBytes = USB_SERIAL_BUF_SIZE - thisPtr->rx_buffer_offset_in;
+  }
+
+  if (numBytes > 0) {
+    ASSERT(thisPtr->rx_buffer_offset_in <= USB_SERIAL_BUF_SIZE);
+    usb_copyRecvBuffer(&(thisPtr->rx_buffer[thisPtr->rx_buffer_offset_in]),numBytes);
+    thisPtr->rx_buffer_offset_in += numBytes;
+  }
+#endif
+}
+
+void HardwareUsb::usb_tx_cb(void) {
+  /* placeholder for when serial dumps exceed buflen */
+}