SFU: Initial

Author: pennam

libraries/SFU/.portenta_only

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+
+/* Key code for writing PRCR register. */
+#define BSP_PRV_PRCR_KEY                              (0xA500U)
+#define BSP_PRV_PRCR_PRC1_UNLOCK                      ((BSP_PRV_PRCR_KEY) | 0x2U)
+#define BSP_PRV_PRCR_LOCK                             ((BSP_PRV_PRCR_KEY) | 0x0U)
+
+#define BSP_PRV_BITS_PER_WORD                         (32)
+
+
+#define POST_APPLICATION_ADDR                         (0x10000)
+#define SKETCH_FLASH_OFFSET                           (64 * 1024)
+
+void setup() {
+  Serial.begin(9600);
+  //while(!Serial){}
+  Serial.println("2nd stage bootloader");
+  
+  int app_valid = (((*(uint32_t *) SKETCH_FLASH_OFFSET + POST_APPLICATION_ADDR) & 0xFF000000) == 0x20000000);
+  if (app_valid) {
+    Serial.print("Booting application @");
+    Serial.print(SKETCH_FLASH_OFFSET + POST_APPLICATION_ADDR, HEX);
+    boot5(SKETCH_FLASH_OFFSET + POST_APPLICATION_ADDR);
+  } else {
+    Serial.print("Application not found");
+  }
+}
+
+void loop() {
+
+}
+
+void boot5(uint32_t address) {
+
+  R_SYSTEM->PRCR = (uint16_t) BSP_PRV_PRCR_PRC1_UNLOCK;
+  R_BSP_MODULE_STOP(FSP_IP_USBFS, 0);
+  R_BSP_MODULE_STOP(FSP_IP_USBHS, 0);
+  R_SYSTEM->PRCR = (uint16_t) BSP_PRV_PRCR_LOCK;
+
+    /* Disable MSP monitoring. */
+#if BSP_FEATURE_TZ_HAS_TRUSTZONE
+    __set_MSPLIM(0);
+#else
+    R_MPU_SPMON->SP[0].CTL = 0;
+#endif
+
+  __disable_irq(); // Note: remember to enable IRQ in application
+  __DSB();
+  __ISB();
+
+  // Disable SysTick
+  SysTick->CTRL = 0;
+
+  SCB->VTOR  = address;
+
+  // Cleanup NVIC
+  for (size_t i = 0U; i < BSP_ICU_VECTOR_MAX_ENTRIES / BSP_PRV_BITS_PER_WORD; i++)
+  {
+    NVIC->ICER[i] = 0xFF;
+  }
+
+  uint32_t mainStackPointer = *(volatile uint32_t *)(address);
+  __set_MSP(mainStackPointer);
+  uint32_t programResetHandlerAddress = *(volatile uint32_t *) (address + 4);
+  void (* programResetHandler)(void) = (void (*)(void)) programResetHandlerAddress;
+  programResetHandler();
+}

libraries/SFU/extra/loader/loader.ino

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+name=SFU
+version=1.0.0
+author=Arduino
+maintainer=Arduino <[email protected]>
+sentence=Second stage bootloader for Portenta C33
+paragraph=
+category=Other
+url=https://www.arduino.cc/en/Reference/SFU
+architectures=renesas_portenta,renesas

libraries/SFU/library.properties

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+/*
+  SFU.h
+  Copyright (c) 2023 Arduino SA.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include "SFU.h"
+
+const unsigned char SFU[0x10000] __attribute__ ((section(".second_stage_ota"), used)) = {
+	#include "c33.h"
+};

libraries/SFU/src/SFU.cpp

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+/*
+  SFU.h
+  Copyright (c) 2023 Arduino SA.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef _SFU_H_
+#define _SFU_H_
+
+#include "Arduino.h"
+
+class SFU {
+public:
+	static int begin();
+	static int download(const char* url);
+	static int apply();
+};
+
+#endif // _SFU_H_