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/* *****************************************************************************
* 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 */
}
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