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/HAL.cpp | 163 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 Marlin/src/HAL/STM32/HAL.cpp

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

diff --git a/Marlin/src/HAL/STM32/HAL.cpp b/Marlin/src/HAL/STM32/HAL.cpp
new file mode 100644
index 0000000..06744f1
--- /dev/null
+++ b/Marlin/src/HAL/STM32/HAL.cpp
@@ -0,0 +1,163 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
+ * Copyright (c) 2017 Victor Perez
+ *
+ * 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 "HAL.h"
+#include "usb_serial.h"
+
+#include "../../inc/MarlinConfig.h"
+#include "../shared/Delay.h"
+
+#ifdef USBCON
+  DefaultSerial MSerial(false, SerialUSB);
+#endif
+
+#if ENABLED(SRAM_EEPROM_EMULATION)
+  #if STM32F7xx
+    #include <stm32f7xx_ll_pwr.h>
+  #elif STM32F4xx
+    #include <stm32f4xx_ll_pwr.h>
+  #else
+    #error "SRAM_EEPROM_EMULATION is currently only supported for STM32F4xx and STM32F7xx"
+  #endif
+#endif
+
+#if HAS_SD_HOST_DRIVE
+  #include "msc_sd.h"
+  #include "usbd_cdc_if.h"
+#endif
+
+// ------------------------
+// Public Variables
+// ------------------------
+
+uint16_t HAL_adc_result;
+
+// ------------------------
+// Public functions
+// ------------------------
+
+// Needed for DELAY_NS() / DELAY_US() on CORTEX-M7
+#if (defined(__arm__) || defined(__thumb__)) && __CORTEX_M == 7
+  // HAL pre-initialization task
+  // Force the preinit function to run between the premain() and main() function
+  // of the STM32 arduino core
+  __attribute__((constructor (102)))
+  void HAL_preinit() {
+    enableCycleCounter();
+  }
+#endif
+
+// HAL initialization task
+void HAL_init() {
+  FastIO_init();
+
+  #if ENABLED(SDSUPPORT) && DISABLED(SDIO_SUPPORT) && (defined(SDSS) && SDSS != -1)
+    OUT_WRITE(SDSS, HIGH); // Try to set SDSS inactive before any other SPI users start up
+  #endif
+
+  #if PIN_EXISTS(LED)
+    OUT_WRITE(LED_PIN, LOW);
+  #endif
+
+  #if ENABLED(SRAM_EEPROM_EMULATION)
+    __HAL_RCC_PWR_CLK_ENABLE();
+    HAL_PWR_EnableBkUpAccess();           // Enable access to backup SRAM
+    __HAL_RCC_BKPSRAM_CLK_ENABLE();
+    LL_PWR_EnableBkUpRegulator();         // Enable backup regulator
+    while (!LL_PWR_IsActiveFlag_BRR());   // Wait until backup regulator is initialized
+  #endif
+
+  SetTimerInterruptPriorities();
+
+  #if ENABLED(EMERGENCY_PARSER) && USBD_USE_CDC
+    USB_Hook_init();
+  #endif
+
+  #if HAS_SD_HOST_DRIVE
+    MSC_SD_init();                         // Enable USB SD card access
+  #endif
+}
+
+// HAL idle task
+void HAL_idletask() {
+  #if HAS_SHARED_MEDIA
+    // Stm32duino currently doesn't have a "loop/idle" method
+    CDC_resume_receive();
+    CDC_continue_transmit();
+  #endif
+}
+
+void HAL_clear_reset_source() { __HAL_RCC_CLEAR_RESET_FLAGS(); }
+
+uint8_t HAL_get_reset_source() {
+  return
+    #ifdef RCC_FLAG_IWDGRST // Some sources may not exist...
+      RESET != __HAL_RCC_GET_FLAG(RCC_FLAG_IWDGRST)  ? RST_WATCHDOG :
+    #endif
+    #ifdef RCC_FLAG_IWDG1RST
+      RESET != __HAL_RCC_GET_FLAG(RCC_FLAG_IWDG1RST) ? RST_WATCHDOG :
+    #endif
+    #ifdef RCC_FLAG_IWDG2RST
+      RESET != __HAL_RCC_GET_FLAG(RCC_FLAG_IWDG2RST) ? RST_WATCHDOG :
+    #endif
+    #ifdef RCC_FLAG_SFTRST
+      RESET != __HAL_RCC_GET_FLAG(RCC_FLAG_SFTRST)   ? RST_SOFTWARE :
+    #endif
+    #ifdef RCC_FLAG_PINRST
+      RESET != __HAL_RCC_GET_FLAG(RCC_FLAG_PINRST)   ? RST_EXTERNAL :
+    #endif
+    #ifdef RCC_FLAG_PORRST
+      RESET != __HAL_RCC_GET_FLAG(RCC_FLAG_PORRST)   ? RST_POWER_ON :
+    #endif
+    0
+  ;
+}
+
+void _delay_ms(const int delay_ms) { delay(delay_ms); }
+
+extern "C" {
+  extern unsigned int _ebss; // end of bss section
+}
+
+// ------------------------
+// ADC
+// ------------------------
+
+// TODO: Make sure this doesn't cause any delay
+void HAL_adc_start_conversion(const uint8_t adc_pin) { HAL_adc_result = analogRead(adc_pin); }
+uint16_t HAL_adc_get_result() { return HAL_adc_result; }
+
+// Reset the system (to initiate a firmware flash)
+void flashFirmware(const int16_t) { NVIC_SystemReset(); }
+
+// Maple Compatibility
+volatile uint32_t systick_uptime_millis = 0;
+systickCallback_t systick_user_callback;
+void systick_attach_callback(systickCallback_t cb) { systick_user_callback = cb; }
+void HAL_SYSTICK_Callback() {
+  systick_uptime_millis++;
+  if (systick_user_callback) systick_user_callback();
+}
+
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
-- 
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