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142 lines
3.9 KiB
142 lines
3.9 KiB
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#ifdef ARDUINO_ARCH_SAM
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/**
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* MarlinSerial_Due.cpp - Hardware serial library for Arduino DUE
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* Copyright (c) 2017 Eduardo José Tagle. All right reserved
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* Based on MarlinSerial for AVR, copyright (c) 2006 Nicholas Zambetti. All right reserved.
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*/
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#include "../../inc/MarlinConfig.h"
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#if HAS_USB_SERIAL
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#include "MarlinSerialUSB.h"
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// Imports from Atmel USB Stack/CDC implementation
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extern "C" {
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bool usb_task_cdc_isenabled();
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bool usb_task_cdc_dtr_active();
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bool udi_cdc_is_rx_ready();
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int udi_cdc_getc();
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bool udi_cdc_is_tx_ready();
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int udi_cdc_putc(int value);
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}
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// Pending character
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static int pending_char = -1;
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// Public Methods
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void MarlinSerialUSB::begin(const long) {}
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void MarlinSerialUSB::end() {}
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int MarlinSerialUSB::peek() {
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if (pending_char >= 0)
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return pending_char;
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// If USB CDC not enumerated or not configured on the PC side
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if (!usb_task_cdc_isenabled())
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return -1;
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// If no bytes sent from the PC
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if (!udi_cdc_is_rx_ready())
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return -1;
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pending_char = udi_cdc_getc();
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TERN_(EMERGENCY_PARSER, emergency_parser.update(static_cast<MSerialT1*>(this)->emergency_state, (char)pending_char));
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return pending_char;
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}
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int MarlinSerialUSB::read() {
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if (pending_char >= 0) {
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int ret = pending_char;
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pending_char = -1;
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return ret;
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}
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// If USB CDC not enumerated or not configured on the PC side
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if (!usb_task_cdc_isenabled())
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return -1;
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// If no bytes sent from the PC
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if (!udi_cdc_is_rx_ready())
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return -1;
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int c = udi_cdc_getc();
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TERN_(EMERGENCY_PARSER, emergency_parser.update(static_cast<MSerialT1*>(this)->emergency_state, (char)c));
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return c;
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}
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int MarlinSerialUSB::available() {
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if (pending_char > 0) return pending_char;
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return pending_char == 0 ||
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// or USB CDC enumerated and configured on the PC side and some bytes where sent to us */
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(usb_task_cdc_isenabled() && udi_cdc_is_rx_ready());
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}
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void MarlinSerialUSB::flush() { }
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size_t MarlinSerialUSB::write(const uint8_t c) {
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/* Do not even bother sending anything if USB CDC is not enumerated
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or not configured on the PC side or there is no program on the PC
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listening to our messages */
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if (!usb_task_cdc_isenabled() || !usb_task_cdc_dtr_active())
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return 0;
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/* Wait until the PC has read the pending to be sent data */
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while (usb_task_cdc_isenabled() &&
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usb_task_cdc_dtr_active() &&
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!udi_cdc_is_tx_ready()) {
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};
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/* Do not even bother sending anything if USB CDC is not enumerated
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or not configured on the PC side or there is no program on the PC
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listening to our messages at this point */
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if (!usb_task_cdc_isenabled() || !usb_task_cdc_dtr_active())
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return 0;
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// Fifo full
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// udi_cdc_signal_overrun();
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udi_cdc_putc(c);
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return 1;
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}
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// Preinstantiate
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#if SERIAL_PORT == -1
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MSerialT1 customizedSerial1(TERN0(EMERGENCY_PARSER, true));
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#endif
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#if SERIAL_PORT_2 == -1
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MSerialT2 customizedSerial2(TERN0(EMERGENCY_PARSER, true));
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#endif
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#if SERIAL_PORT_3 == -1
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MSerialT3 customizedSerial3(TERN0(EMERGENCY_PARSER, true));
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#endif
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#endif // HAS_USB_SERIAL
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#endif // ARDUINO_ARCH_SAM
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