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Commit 700ab05

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Merge pull request #119 from JAndrassy/sdu
The SDU library for Uno R4
2 parents 2e56526 + 6a50e54 commit 700ab05

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‎libraries/SDU/.unor4_only

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‎libraries/SDU/examples/Usage/Usage.ino

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/*
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Usage
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This example demonstrates how to use the UNO R4 SDU library to update a
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sketch on an Arduino UNO R4 (WiFi, Minima) board using an
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SD card. It prints out the date and time the sketch was compiled at
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to both Serial and Serial1.
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Circuit:
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* Arduino UNO R4 Minima or WiFi board
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* SD shield or breakout connected with CS pin of 4
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* SD card
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Non-Arduino UNO R4 board are NOT supported.
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Steps to update sketch via SD card:
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1) Upload this sketch or another sketch that includes the SDU library
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via #include <SDU.h>
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2) Update the sketch as desired. For this example the sketch prints out
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the compiled date and time so no updates are needed.
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3) In the IDE select: Sketch -> Export Compiled Binary
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4) Copy the .bin file from the sketch's folder to the SD card and rename
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the file to UPDATE.bin. Eject the SD card from your PC.
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5) Insert the SD card into the board, shield or breakout and press the
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reset button or power cycle the board. The SDU library will then update
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the sketch on the board with the contents of UPDATE.bin
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created 23 March 2017
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by Sandeep Mistry
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*/
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/*
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Include the SDU library
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This will add some code to the sketch before setup() is called
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to check if an SD card is present and UPDATE.bin exists on the
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SD card.
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If UPDATE.bin is present, the file is used to update the sketch
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running on the board. After this UPDATE.bin is deleted from the
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SD card.
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*/
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#include <SDU.h>
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String message;
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void setup() {
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Serial.begin(115200);
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// Wait for Serial Monitor connection
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while (!Serial.available()) {
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Serial.println("Send any key.");
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delay(1000);
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}
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message += "Sketch compile date and time: ";
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message += __DATE__;
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message += " ";
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message += __TIME__;
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// print out the sketch compile date and time on the serial port
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Serial.println(message);
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}
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void loop() {
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// add you own code here
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}
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/*
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* This sketch is a modified version of the SDUBoot example from the SDU
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* library in the Arduino SAMD core.
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*
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* SDUBoot.ino is converted with build.sh into HEX values in a .h file
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* in 'boot' folder of the SDU library. The SDU library with support of
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* the linker script inserts the binary representation of this sketch
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* before the actual sketch. This way this sketch acts as a second stage
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* bootloader always uploaded with the sketch's binary.
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*
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* To make this second stage bootloader as small as possible while it is
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* still an Arduino sketch, it can't be built with standard boards
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* configurations of UNO R4 Minima or Wifi.
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* Additionally the libfsp.a is built without code flash writing support
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* and this sketch needs it.
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*
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* I created a custom board definition to build this sketch to a binary
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* size less than 0x6000 bytes.
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* https://github.com/JAndrassy/my_boards/tree/master/renesas-uno
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* The custom unor4_sdu variant has peripherals support removed with many
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* 'HOWMANY' settings in pins_arduino.h set to 0 to make the SDUBoot sketch
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* bin even smaller.
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* The bin size reduction for libfsp.a and the sketch is described here
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* https://github.com/arduino/ArduinoCore-renesas/discussions/118
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*/
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#include <SD.h>
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#include <r_flash_lp.h>
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#define SDU_START 0x4000
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#define SDU_SIZE 0x6000
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#define SKETCH_START (uint32_t*)(SDU_START + SDU_SIZE)
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#ifndef SDCARD_SS_PIN
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#define SDCARD_SS_PIN 4
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#endif
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#define UPDATE_FILE "UPDATE.BIN"
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flash_lp_instance_ctrl_t ctrl;
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flash_cfg_t cfg;
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void stopAgt(); //add to core/time.cpp as { main_timer.close();}
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void setup() {
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delay(1);
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if (SD.begin(SDCARD_SS_PIN) && SD.exists(UPDATE_FILE)) {
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File updateFile = SD.open(UPDATE_FILE);
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uint32_t updateSize = updateFile.size();
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bool updateFlashed = false;
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if (updateSize > SDU_SIZE) {
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// skip the SDU section
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updateFile.seek(SDU_SIZE);
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updateSize -= SDU_SIZE;
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cfg.data_flash_bgo = false;
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cfg.p_callback = nullptr;
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cfg.p_context = nullptr;
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cfg.ipl = (BSP_IRQ_DISABLED);
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cfg.irq = FSP_INVALID_VECTOR;
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fsp_err_t rv = R_FLASH_LP_Open(&ctrl, &cfg);
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if (rv == FSP_SUCCESS) {
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uint32_t flashAddress = (uint32_t) SKETCH_START;
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// erase the pages
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__disable_irq();
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rv = R_FLASH_LP_Erase(&ctrl, flashAddress, (updateSize / BSP_FEATURE_FLASH_LP_CF_BLOCK_SIZE) + 1);
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__enable_irq();
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if (rv == FSP_SUCCESS) {
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uint8_t buffer[32 * BSP_FEATURE_FLASH_LP_CF_WRITE_SIZE];
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// write the pages
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for (uint32_t i = 0; i < updateSize; i += sizeof(buffer)) {
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updateFile.read(buffer, sizeof(buffer));
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__disable_irq();
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R_FLASH_LP_Write(&ctrl, (uint32_t) &buffer, flashAddress, sizeof(buffer));
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__enable_irq();
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flashAddress += sizeof(buffer);
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}
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updateFlashed = true;
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}
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R_FLASH_LP_Close(&ctrl);
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}
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updateFile.close();
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if (updateFlashed) {
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SD.remove(UPDATE_FILE);
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}
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}
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}
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stopAgt();
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SysTick->CTRL = 0;
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// Disable MSP monitoring.
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R_MPU_SPMON->SP[0].CTL = 0;
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// jump to the sketch
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__set_MSP(*SKETCH_START);
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//Reset vector table address
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SCB->VTOR = ((uint32_t) (SKETCH_START ) & SCB_VTOR_TBLOFF_Msk);
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// address of Reset_Handler is written by the linker at the beginning of the .text section (see linker script)
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uint32_t resetHandlerAddress = (uint32_t) *(SKETCH_START + 1);
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// jump to reset handler
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asm("bx %0"::"r"(resetHandlerAddress));
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}
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void loop() {
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}

‎libraries/SDU/extras/SDUBoot/build.sh

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#!/bin/sh -x
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ARDUINO=arduino-cli
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SKETCH_NAME="SDUBoot.ino"
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SKETCH="$PWD/$SKETCH_NAME"
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BUILD_PATH="$PWD/build"
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OUTPUT_PATH="../../src/boot"
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buildSDUBootSketch() {
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BOARD=1ドル
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DESTINATION=2ドル
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$ARDUINO compile -b $BOARD --output-dir="$BUILD_PATH" "$SKETCH"
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cat "$BUILD_PATH/$SKETCH_NAME.bin" | xxd -i > $DESTINATION
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rm -rf "$BUILD_PATH"
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}
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mkdir -p "$OUTPUT_PATH"
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buildSDUBootSketch "my_boards:renesas_uno:unor4_sdu" "$OUTPUT_PATH/unor4.h"
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‎libraries/SDU/library.properties

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name=SDU
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version=1.0.0
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author=Arduino
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maintainer=Arduino <info@arduino.cc>
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sentence=Update the sketch on your board from an SD card
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paragraph=Requires an SD card
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category=Other
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url=http://www.arduino.cc/en/Reference/SDU
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architectures=renesas,renesas_uno

‎libraries/SDU/src/SDU.cpp

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/*
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Copyright (c) 2017 Arduino LLC. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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.
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See the GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <Arduino.h>
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#include "SDU.h"
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__attribute__ ((section(".sketch_boot")))
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unsigned char sduBoot[0x6000] = {
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#if defined(ARDUINO_ARCH_RENESAS_UNO)
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#include "boot/unor4.h"
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#else
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#error "Unsupported board!"
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#endif
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};

‎libraries/SDU/src/SDU.h

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/*
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Copyright (c) 2017 Arduino LLC. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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.
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See the GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _SDU_H_INCLUDED
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#define _SDU_H_INCLUDED
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// nothing for now
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#endif

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