mirror of https://github.com/rusefi/dfu_java.git
42 lines
1.9 KiB
Java
42 lines
1.9 KiB
Java
package com.rusefi.dfu;
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import com.rusefi.dfu.commands.DfuSeCommandErasePage;
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import com.rusefi.dfu.commands.DfuSeCommandSetAddress;
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import java.nio.ByteBuffer;
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import java.util.List;
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public class DfuLogic {
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public static final short ST_VENDOR = 0x0483;
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public static final int ST_DFU_PRODUCT = 0xdf11;
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public static final int USB_CLASS_APP_SPECIFIC = 0xfe;
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public static final byte DFU_SUBCLASS = 0x01;
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public static final byte USB_DT_DFU = 0x21;
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public static final String FLASH_TAG = "Flash";
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public static void uploadImage(DfuConnection device, BinaryImage image, FlashRange range) {
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List<Integer> erasePages = range.pagesForSize(image.getImageSize());
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// todo: smarted start address logic
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int eraseAddress = 0x08000000;
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for (Integer erasePage : erasePages) {
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DfuSeCommandErasePage.execute(device, eraseAddress);
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eraseAddress += erasePage;
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}
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System.out.println(String.format("Erased up to %x", eraseAddress));
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for (int offset = 0; offset < image.getImage().length; offset += device.getTransferSize()) {
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DfuSeCommandSetAddress.execute(device, device.getFlashRange().getBaseAddress() + offset);
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DfuConnectionUtil.waitStatus(device);
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ByteBuffer buffer = ByteBuffer.allocateDirect(device.getTransferSize());
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// last transfer would usually be smaller than transfer size
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int size = Math.min(device.getTransferSize(), image.getImage().length - offset);
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buffer.put(image.getImage(), offset, size);
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device.sendData(DfuCommmand.DNLOAD, DfuSeCommand.W_DNLOAD, buffer);
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// AN3156 USB DFU protocol used in the STM32 bootloader
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// "The Write memory operation is effectively executed only when a DFU_GETSTATUS request is issued by the host. "
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DfuConnectionUtil.waitStatus(device);
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}
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}
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}
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