From e8701195e66f2d27ffe17fb514eae8173795aaf7 Mon Sep 17 00:00:00 2001
From: Georgiy Bondarenko <69736697+nehilo@users.noreply.github.com>
Date: Thu, 4 Mar 2021 22:54:23 +0500
Subject: Initial commit

---
 Marlin/src/HAL/STM32/MarlinSerial.cpp | 89 +++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 Marlin/src/HAL/STM32/MarlinSerial.cpp

(limited to 'Marlin/src/HAL/STM32/MarlinSerial.cpp')

diff --git a/Marlin/src/HAL/STM32/MarlinSerial.cpp b/Marlin/src/HAL/STM32/MarlinSerial.cpp
new file mode 100644
index 0000000..cfb13f5
--- /dev/null
+++ b/Marlin/src/HAL/STM32/MarlinSerial.cpp
@@ -0,0 +1,89 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * 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/>.
+ *
+ */
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+
+#include "../../inc/MarlinConfig.h"
+#include "MarlinSerial.h"
+
+#if ENABLED(EMERGENCY_PARSER)
+  #include "../../feature/e_parser.h"
+#endif
+
+#ifndef USART4
+  #define USART4 UART4
+#endif
+
+#ifndef USART5
+  #define USART5 UART5
+#endif
+
+#define DECLARE_SERIAL_PORT(ser_num) \
+  void _rx_complete_irq_ ## ser_num (serial_t * obj); \
+  MSerialT MSerial ## ser_num (true, USART ## ser_num, &_rx_complete_irq_ ## ser_num); \
+  void _rx_complete_irq_ ## ser_num (serial_t * obj) { MSerial ## ser_num ._rx_complete_irq(obj); }
+
+#define DECLARE_SERIAL_PORT_EXP(ser_num) DECLARE_SERIAL_PORT(ser_num)
+
+#if defined(SERIAL_PORT) && SERIAL_PORT >= 0
+  DECLARE_SERIAL_PORT_EXP(SERIAL_PORT)
+#endif
+
+#if defined(SERIAL_PORT_2) && SERIAL_PORT_2 >= 0
+  DECLARE_SERIAL_PORT_EXP(SERIAL_PORT_2)
+#endif
+
+#if defined(MMU2_SERIAL_PORT) && MMU2_SERIAL_PORT >= 0
+  DECLARE_SERIAL_PORT_EXP(MMU2_SERIAL_PORT)
+#endif
+
+#if defined(LCD_SERIAL_PORT) && LCD_SERIAL_PORT >= 0
+  DECLARE_SERIAL_PORT_EXP(LCD_SERIAL_PORT)
+#endif
+
+void MarlinSerial::begin(unsigned long baud, uint8_t config) {
+  HardwareSerial::begin(baud, config);
+  // Replace the IRQ callback with the one we have defined
+  TERN_(EMERGENCY_PARSER, _serial.rx_callback = _rx_callback);
+}
+
+// This function is Copyright (c) 2006 Nicholas Zambetti.
+void MarlinSerial::_rx_complete_irq(serial_t *obj) {
+  // No Parity error, read byte and store it in the buffer if there is room
+  unsigned char c;
+
+  if (uart_getc(obj, &c) == 0) {
+
+    rx_buffer_index_t i = (unsigned int)(obj->rx_head + 1) % SERIAL_RX_BUFFER_SIZE;
+
+    // if we should be storing the received character into the location
+    // just before the tail (meaning that the head would advance to the
+    // current location of the tail), we're about to overflow the buffer
+    // and so we don't write the character or advance the head.
+    if (i != obj->rx_tail) {
+      obj->rx_buff[obj->rx_head] = c;
+      obj->rx_head = i;
+    }
+
+    #if ENABLED(EMERGENCY_PARSER)
+      emergency_parser.update(static_cast<MSerialT*>(this)->emergency_state, c);
+    #endif
+  }
+}
+
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
-- 
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