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- /**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * 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 <https://www.gnu.org/licenses/>.
- *
- */
- #ifdef ARDUINO_ARCH_SAM
-
- /**
- * MarlinSerial_Due.cpp - Hardware serial library for Arduino DUE
- * Copyright (c) 2017 Eduardo José Tagle. All right reserved
- * Based on MarlinSerial for AVR, copyright (c) 2006 Nicholas Zambetti. All right reserved.
- */
-
- #include "../../inc/MarlinConfig.h"
-
- #if HAS_USB_SERIAL
-
- #include "MarlinSerialUSB.h"
-
- // Imports from Atmel USB Stack/CDC implementation
- extern "C" {
- bool usb_task_cdc_isenabled();
- bool usb_task_cdc_dtr_active();
- bool udi_cdc_is_rx_ready();
- int udi_cdc_getc();
- bool udi_cdc_is_tx_ready();
- int udi_cdc_putc(int value);
- }
-
- // Pending character
- static int pending_char = -1;
-
- // Public Methods
- void MarlinSerialUSB::begin(const long) {}
-
- void MarlinSerialUSB::end() {}
-
- int MarlinSerialUSB::peek() {
- if (pending_char >= 0)
- return pending_char;
-
- // If USB CDC not enumerated or not configured on the PC side
- if (!usb_task_cdc_isenabled())
- return -1;
-
- // If no bytes sent from the PC
- if (!udi_cdc_is_rx_ready())
- return -1;
-
- pending_char = udi_cdc_getc();
-
- TERN_(EMERGENCY_PARSER, emergency_parser.update(static_cast<MSerialT1*>(this)->emergency_state, (char)pending_char));
-
- return pending_char;
- }
-
- int MarlinSerialUSB::read() {
- if (pending_char >= 0) {
- int ret = pending_char;
- pending_char = -1;
- return ret;
- }
-
- // If USB CDC not enumerated or not configured on the PC side
- if (!usb_task_cdc_isenabled())
- return -1;
-
- // If no bytes sent from the PC
- if (!udi_cdc_is_rx_ready())
- return -1;
-
- int c = udi_cdc_getc();
-
- TERN_(EMERGENCY_PARSER, emergency_parser.update(static_cast<MSerialT1*>(this)->emergency_state, (char)c));
-
- return c;
- }
-
- int MarlinSerialUSB::available() {
- if (pending_char > 0) return pending_char;
- return pending_char == 0 ||
- // or USB CDC enumerated and configured on the PC side and some bytes where sent to us */
- (usb_task_cdc_isenabled() && udi_cdc_is_rx_ready());
- }
-
- void MarlinSerialUSB::flush() { }
-
- size_t MarlinSerialUSB::write(const uint8_t c) {
-
- /* Do not even bother sending anything if USB CDC is not enumerated
- or not configured on the PC side or there is no program on the PC
- listening to our messages */
- if (!usb_task_cdc_isenabled() || !usb_task_cdc_dtr_active())
- return 0;
-
- /* Wait until the PC has read the pending to be sent data */
- while (usb_task_cdc_isenabled() &&
- usb_task_cdc_dtr_active() &&
- !udi_cdc_is_tx_ready()) {
- };
-
- /* Do not even bother sending anything if USB CDC is not enumerated
- or not configured on the PC side or there is no program on the PC
- listening to our messages at this point */
- if (!usb_task_cdc_isenabled() || !usb_task_cdc_dtr_active())
- return 0;
-
- // Fifo full
- // udi_cdc_signal_overrun();
- udi_cdc_putc(c);
- return 1;
- }
-
- // Preinstantiate
- #if SERIAL_PORT == -1
- MSerialT1 customizedSerial1(TERN0(EMERGENCY_PARSER, true));
- #endif
- #if SERIAL_PORT_2 == -1
- MSerialT2 customizedSerial2(TERN0(EMERGENCY_PARSER, true));
- #endif
- #if SERIAL_PORT_3 == -1
- MSerialT3 customizedSerial3(TERN0(EMERGENCY_PARSER, true));
- #endif
-
- #endif // HAS_USB_SERIAL
- #endif // ARDUINO_ARCH_SAM
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