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