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118 lines
3.2 KiB
118 lines
3.2 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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#pragma once
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#include "../../../inc/MarlinConfigPre.h"
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#if ENABLED(EMERGENCY_PARSER)
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#include "../../../feature/e_parser.h"
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#endif
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#include "../../../core/serial_hook.h"
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#include <stdarg.h>
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#include <stdio.h>
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/**
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* Generic RingBuffer
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* T type of the buffer array
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* S size of the buffer (must be power of 2)
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*/
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template <typename T, uint32_t S> class RingBuffer {
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public:
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RingBuffer() { index_read = index_write = 0; }
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uint32_t available() volatile { return index_write - index_read; }
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uint32_t free() volatile { return buffer_size - available(); }
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bool empty() volatile { return index_read == index_write; }
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bool full() volatile { return available() == buffer_size; }
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void clear() volatile { index_read = index_write = 0; }
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bool peek(T *value) volatile {
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if (value == 0 || available() == 0)
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return false;
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*value = buffer[mask(index_read)];
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return true;
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}
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int read() volatile {
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if (empty()) return -1;
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return buffer[mask(index_read++)];
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}
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bool write(T value) volatile {
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if (full()) return false;
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buffer[mask(index_write++)] = value;
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return true;
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}
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private:
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uint32_t mask(uint32_t val) volatile {
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return buffer_mask & val;
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}
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static const uint32_t buffer_size = S;
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static const uint32_t buffer_mask = buffer_size - 1;
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volatile T buffer[buffer_size];
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volatile uint32_t index_write;
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volatile uint32_t index_read;
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};
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struct HalSerial {
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HalSerial() { host_connected = true; }
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void begin(int32_t) {}
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void end() {}
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int peek() {
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uint8_t value;
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return receive_buffer.peek(&value) ? value : -1;
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}
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int read() { return receive_buffer.read(); }
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size_t write(char c) {
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if (!host_connected) return 0;
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while (!transmit_buffer.free());
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return transmit_buffer.write(c);
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}
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bool connected() { return host_connected; }
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uint16_t available() {
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return (uint16_t)receive_buffer.available();
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}
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void flush() { receive_buffer.clear(); }
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uint8_t availableForWrite() {
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return transmit_buffer.free() > 255 ? 255 : (uint8_t)transmit_buffer.free();
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}
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void flushTX() {
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if (host_connected)
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while (transmit_buffer.available()) { /* nada */ }
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}
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volatile RingBuffer<uint8_t, 128> receive_buffer;
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volatile RingBuffer<uint8_t, 128> transmit_buffer;
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volatile bool host_connected;
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};
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typedef Serial1Class<HalSerial> MSerialT;
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