Emergency Parser for STM32F1 (MarlinFirmware#19279)

Marlin/src/HAL/STM32F1/HAL.h

@@ -46,6 +46,8 @@
   #include "msc_sd.h"
 #endif
 
+#include "MarlinSerial.h"
+
 // ------------------------
 // Defines
 // ------------------------
@@ -64,17 +66,6 @@
   #else
     #define UsbSerial MarlinCompositeSerial
   #endif
-  #define MSerial1  Serial1
-  #define MSerial2  Serial2
-  #define MSerial3  Serial3
-  #define MSerial4  Serial4
-  #define MSerial5  Serial5
-#else
-  #define MSerial1  Serial
-  #define MSerial2  Serial1
-  #define MSerial3  Serial2
-  #define MSerial4  Serial3
-  #define MSerial5  Serial4
 #endif
 
 #if SERIAL_PORT == 0

Marlin/src/HAL/STM32F1/MarlinSerial.cpp

@@ -0,0 +1,93 @@
+/**
+ * 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/>.
+ *
+ */
+
+#include "../../inc/MarlinConfigPre.h"
+#include "MarlinSerial.h"
+#include <libmaple/usart.h>
+
+// Copied from ~/.platformio/packages/framework-arduinoststm32-maple/STM32F1/system/libmaple/usart_private.h
+// Changed to handle Emergency Parser
+static inline __always_inline void my_usart_irq(ring_buffer *rb, ring_buffer *wb, usart_reg_map *regs, MarlinSerial &serial) {
+   /* Handle RXNEIE and TXEIE interrupts.
+    * RXNE signifies availability of a byte in DR.
+    *
+    * See table 198 (sec 27.4, p809) in STM document RM0008 rev 15.
+    * We enable RXNEIE.
+    */
+  if ((regs->CR1 & USART_CR1_RXNEIE) && (regs->SR & USART_SR_RXNE)) {
+    uint8_t c = (uint8)regs->DR;
+    #ifdef USART_SAFE_INSERT
+      // If the buffer is full and the user defines USART_SAFE_INSERT,
+      // ignore new bytes.
+      rb_safe_insert(rb, c);
+    #else
+      // By default, push bytes around in the ring buffer.
+      rb_push_insert(rb, c);
+    #endif
+    #if ENABLED(EMERGENCY_PARSER)
+      emergency_parser.update(serial.emergency_state, c);
+    #endif
+  }
+  // TXE signifies readiness to send a byte to DR.
+  if ((regs->CR1 & USART_CR1_TXEIE) && (regs->SR & USART_SR_TXE)) {
+    if (!rb_is_empty(wb))
+      regs->DR=rb_remove(wb);
+    else
+      regs->CR1 &= ~((uint32)USART_CR1_TXEIE); // disable TXEIE
+  }
+}
+
+#define DEFINE_HWSERIAL_MARLIN(name, n)  \
+  MarlinSerial name(USART##n,            \
+            BOARD_USART##n##_TX_PIN,     \
+            BOARD_USART##n##_RX_PIN);    \
+  extern "C" void __irq_usart##n(void) { \
+    my_usart_irq(USART##n->rb, USART##n->wb, USART##n##_BASE, MSerial##n); \
+  }
+
+#define DEFINE_HWSERIAL_UART_MARLIN(name, n) \
+  MarlinSerial name(UART##n,                 \
+            BOARD_USART##n##_TX_PIN,         \
+            BOARD_USART##n##_RX_PIN);        \
+  extern "C" void __irq_usart##n(void) {     \
+    my_usart_irq(USART##n->rb, USART##n->wb, USART##n##_BASE, MSerial##n); \
+  }
+
+#if SERIAL_PORT == 1 || SERIAL_PORT_2 == 1 || DGUS_SERIAL_PORT == 1
+  DEFINE_HWSERIAL_MARLIN(MSerial1, 1);
+#endif
+
+#if SERIAL_PORT == 2 || SERIAL_PORT_2 == 2 || DGUS_SERIAL_PORT == 2
+  DEFINE_HWSERIAL_MARLIN(MSerial2, 2);
+#endif
+
+#if SERIAL_PORT == 3 || SERIAL_PORT_2 == 3 || DGUS_SERIAL_PORT == 3
+  DEFINE_HWSERIAL_MARLIN(MSerial3, 3);
+#endif
+
+#if SERIAL_PORT == 4 || SERIAL_PORT_2 == 4 || DGUS_SERIAL_PORT == 4
+  DEFINE_HWSERIAL_UART_MARLIN(MSerial4, 4);
+#endif
+
+#if SERIAL_PORT == 5 || SERIAL_PORT_2 == 5 || DGUS_SERIAL_PORT == 5
+  DEFINE_HWSERIAL_UART_MARLIN(MSerial5, 5);
+#endif

Marlin/src/HAL/STM32F1/MarlinSerial.h

@@ -0,0 +1,50 @@
+/**
+ * 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 <HardwareSerial.h>
+#include <WString.h>
+
+#include "../../inc/MarlinConfigPre.h"
+#if ENABLED(EMERGENCY_PARSER)
+  #include "../../feature/e_parser.h"
+#endif
+
+class MarlinSerial : public HardwareSerial {
+public:
+  MarlinSerial(struct usart_dev *usart_device, uint8 tx_pin, uint8 rx_pin) :
+    HardwareSerial(usart_device, tx_pin, rx_pin)
+    #if ENABLED(EMERGENCY_PARSER)
+      , emergency_state(EmergencyParser::State::EP_RESET)
+    #endif
+    { }
+
+  #if ENABLED(EMERGENCY_PARSER)
+    EmergencyParser::State emergency_state;
+  #endif
+};
+
+extern MarlinSerial MSerial1;
+extern MarlinSerial MSerial2;
+extern MarlinSerial MSerial3;
+extern MarlinSerial MSerial4;
+extern MarlinSerial MSerial5;

Marlin/src/HAL/STM32F1/inc/SanityCheck.h

@@ -25,10 +25,6 @@
  * Test STM32F1-specific configuration values for errors at compile-time.
  */
 
-#if ENABLED(EMERGENCY_PARSER)
-  #error "EMERGENCY_PARSER is not yet implemented for STM32F1. Disable EMERGENCY_PARSER to continue."
-#endif
-
 #if ENABLED(FAST_PWM_FAN) || SPINDLE_LASER_FREQUENCY
   #error "Features requiring Hardware PWM (FAST_PWM_FAN, SPINDLE_LASER_FREQUENCY) are not yet supported on STM32F1."
 #endif