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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/>.
*
*/
#pragma once
/**
* MarlinSerial_Due.h - 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 <WString.h>
#include "../../inc/MarlinConfigPre.h"
#include "../../core/serial_hook.h"
// Define constants and variables for buffering incoming serial data. We're
// using a ring buffer (I think), in which rx_buffer_head is the index of the
// location to which to write the next incoming character and rx_buffer_tail
// is the index of the location from which to read.
// 256 is the max limit due to uint8_t head and tail. Use only powers of 2. (...,16,32,64,128,256)
#ifndef RX_BUFFER_SIZE
#define RX_BUFFER_SIZE 128
#endif
#ifndef TX_BUFFER_SIZE
#define TX_BUFFER_SIZE 32
#endif
//#if ENABLED(SERIAL_XON_XOFF) && RX_BUFFER_SIZE < 1024
// #error "SERIAL_XON_XOFF requires RX_BUFFER_SIZE >= 1024 for reliable transfers without drops."
//#elif RX_BUFFER_SIZE && (RX_BUFFER_SIZE < 2 || !IS_POWER_OF_2(RX_BUFFER_SIZE))
// #error "RX_BUFFER_SIZE must be a power of 2 greater than 1."
//#elif TX_BUFFER_SIZE && (TX_BUFFER_SIZE < 2 || TX_BUFFER_SIZE > 256 || !IS_POWER_OF_2(TX_BUFFER_SIZE))
// #error "TX_BUFFER_SIZE must be 0, a power of 2 greater than 1, and no greater than 256."
//#endif
// Templated type selector
template<bool b, typename T, typename F> struct TypeSelector { typedef T type;} ;
template<typename T, typename F> struct TypeSelector<false, T, F> { typedef F type; };
// Templated structure wrapper
template<typename S, unsigned int addr> struct StructWrapper {
constexpr StructWrapper(int) {}
FORCE_INLINE S* operator->() const { return (S*)addr; }
};
template<typename Cfg>
class MarlinSerial {
protected:
// Information for all supported UARTs
static constexpr uint32_t BASES[] = {0x400E0800U, 0x40098000U, 0x4009C000U, 0x400A0000U, 0x400A4000U};
static constexpr IRQn_Type IRQS[] = { UART_IRQn, USART0_IRQn, USART1_IRQn, USART2_IRQn, USART3_IRQn};
static constexpr int IRQ_IDS[] = { ID_UART, ID_USART0, ID_USART1, ID_USART2, ID_USART3};
// Alias for shorter code
static constexpr StructWrapper<Uart,BASES[Cfg::PORT]> HWUART = 0;
static constexpr IRQn_Type HWUART_IRQ = IRQS[Cfg::PORT];
static constexpr int HWUART_IRQ_ID = IRQ_IDS[Cfg::PORT];
// Base size of type on buffer size
typedef typename TypeSelector<(Cfg::RX_SIZE>256), uint16_t, uint8_t>::type ring_buffer_pos_t;
struct ring_buffer_r {
volatile ring_buffer_pos_t head, tail;
unsigned char buffer[Cfg::RX_SIZE];
};
struct ring_buffer_t {
volatile uint8_t head, tail;
unsigned char buffer[Cfg::TX_SIZE];
};
static ring_buffer_r rx_buffer;
static ring_buffer_t tx_buffer;
static bool _written;
static constexpr uint8_t XON_XOFF_CHAR_SENT = 0x80, // XON / XOFF Character was sent
XON_XOFF_CHAR_MASK = 0x1F; // XON / XOFF character to send
// XON / XOFF character definitions
static constexpr uint8_t XON_CHAR = 17, XOFF_CHAR = 19;
static uint8_t xon_xoff_state,
rx_dropped_bytes,
rx_buffer_overruns,
rx_framing_errors;
static ring_buffer_pos_t rx_max_enqueued;
FORCE_INLINE static void store_rxd_char();
FORCE_INLINE static void _tx_thr_empty_irq();
static void UART_ISR();
public:
MarlinSerial() {};
static void begin(const long);
static void end();
static int peek();
static int read();
static void flush();
static ring_buffer_pos_t available();
static size_t write(const uint8_t c);
static void flushTX();
static inline bool emergency_parser_enabled() { return Cfg::EMERGENCYPARSER; }
FORCE_INLINE static uint8_t dropped() { return Cfg::DROPPED_RX ? rx_dropped_bytes : 0; }
FORCE_INLINE static uint8_t buffer_overruns() { return Cfg::RX_OVERRUNS ? rx_buffer_overruns : 0; }
FORCE_INLINE static uint8_t framing_errors() { return Cfg::RX_FRAMING_ERRORS ? rx_framing_errors : 0; }
FORCE_INLINE static ring_buffer_pos_t rxMaxEnqueued() { return Cfg::MAX_RX_QUEUED ? rx_max_enqueued : 0; }
};
// Serial port configuration
template <uint8_t serial>
struct MarlinSerialCfg {
static constexpr int PORT = serial;
static constexpr unsigned int RX_SIZE = RX_BUFFER_SIZE;
static constexpr unsigned int TX_SIZE = TX_BUFFER_SIZE;
static constexpr bool XONOFF = ENABLED(SERIAL_XON_XOFF);
static constexpr bool EMERGENCYPARSER = ENABLED(EMERGENCY_PARSER);
static constexpr bool DROPPED_RX = ENABLED(SERIAL_STATS_DROPPED_RX);
static constexpr bool RX_OVERRUNS = ENABLED(SERIAL_STATS_RX_BUFFER_OVERRUNS);
static constexpr bool RX_FRAMING_ERRORS = ENABLED(SERIAL_STATS_RX_FRAMING_ERRORS);
static constexpr bool MAX_RX_QUEUED = ENABLED(SERIAL_STATS_MAX_RX_QUEUED);
};
#if SERIAL_PORT >= 0
typedef Serial0Type< MarlinSerial< MarlinSerialCfg<SERIAL_PORT> > > MSerialT;
extern MSerialT customizedSerial1;
#endif
#if defined(SERIAL_PORT_2) && SERIAL_PORT_2 >= 0
typedef Serial0Type< MarlinSerial< MarlinSerialCfg<SERIAL_PORT_2> > > MSerialT2;
extern MSerialT2 customizedSerial2;
#endif
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