113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
/**
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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 __STM32F1__
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#include "../../inc/MarlinConfigPre.h"
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#include "MarlinSerial.h"
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#include <libmaple/usart.h>
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// Copied from ~/.platformio/packages/framework-arduinoststm32-maple/STM32F1/system/libmaple/usart_private.h
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// Changed to handle Emergency Parser
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static inline __always_inline void my_usart_irq(ring_buffer *rb, ring_buffer *wb, usart_reg_map *regs, MarlinSerial &serial) {
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/* Handle RXNEIE and TXEIE interrupts.
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* RXNE signifies availability of a byte in DR.
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*
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* See table 198 (sec 27.4, p809) in STM document RM0008 rev 15.
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* We enable RXNEIE.
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*/
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uint32_t srflags = regs->SR, cr1its = regs->CR1;
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if ((cr1its & USART_CR1_RXNEIE) && (srflags & USART_SR_RXNE)) {
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if (srflags & USART_SR_FE || srflags & USART_SR_PE ) {
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// framing error or parity error
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regs->DR; // Read and throw away the data, which also clears FE and PE
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}
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else {
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uint8_t c = (uint8)regs->DR;
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#ifdef USART_SAFE_INSERT
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// If the buffer is full and the user defines USART_SAFE_INSERT,
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// ignore new bytes.
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rb_safe_insert(rb, c);
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#else
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// By default, push bytes around in the ring buffer.
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rb_push_insert(rb, c);
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#endif
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#if ENABLED(EMERGENCY_PARSER)
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emergency_parser.update(serial.emergency_state, c);
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#endif
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}
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}
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else if (srflags & USART_SR_ORE) {
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// overrun and empty data, just do a dummy read to clear ORE
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// and prevent a raise condition where a continous interrupt stream (due to ORE set) occurs
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// (see chapter "Overrun error" ) in STM32 reference manual
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regs->DR;
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}
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// TXE signifies readiness to send a byte to DR.
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if ((cr1its & USART_CR1_TXEIE) && (srflags & USART_SR_TXE)) {
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if (!rb_is_empty(wb))
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regs->DR=rb_remove(wb);
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else
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regs->CR1 &= ~((uint32)USART_CR1_TXEIE); // disable TXEIE
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}
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}
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#define DEFINE_HWSERIAL_MARLIN(name, n) \
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MarlinSerial name(USART##n, \
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BOARD_USART##n##_TX_PIN, \
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BOARD_USART##n##_RX_PIN); \
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extern "C" void __irq_usart##n(void) { \
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my_usart_irq(USART##n->rb, USART##n->wb, USART##n##_BASE, MSerial##n); \
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}
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#define DEFINE_HWSERIAL_UART_MARLIN(name, n) \
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MarlinSerial name(UART##n, \
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BOARD_USART##n##_TX_PIN, \
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BOARD_USART##n##_RX_PIN); \
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extern "C" void __irq_usart##n(void) { \
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my_usart_irq(USART##n->rb, USART##n->wb, USART##n##_BASE, MSerial##n); \
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}
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#if SERIAL_PORT == 1 || SERIAL_PORT_2 == 1 || DGUS_SERIAL_PORT == 1
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DEFINE_HWSERIAL_MARLIN(MSerial1, 1);
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#endif
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#if SERIAL_PORT == 2 || SERIAL_PORT_2 == 2 || DGUS_SERIAL_PORT == 2
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DEFINE_HWSERIAL_MARLIN(MSerial2, 2);
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#endif
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#if SERIAL_PORT == 3 || SERIAL_PORT_2 == 3 || DGUS_SERIAL_PORT == 3
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DEFINE_HWSERIAL_MARLIN(MSerial3, 3);
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#endif
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#if SERIAL_PORT == 4 || SERIAL_PORT_2 == 4 || DGUS_SERIAL_PORT == 4
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DEFINE_HWSERIAL_UART_MARLIN(MSerial4, 4);
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#endif
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#if SERIAL_PORT == 5 || SERIAL_PORT_2 == 5 || DGUS_SERIAL_PORT == 5
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DEFINE_HWSERIAL_UART_MARLIN(MSerial5, 5);
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#endif
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#endif // __STM32F1__
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