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Android-DFU-Library
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git-svn-id: http://svn.nordicsemi.no/applications/mobile/android/DFULibrary/trunk@6061 94a72e49-5737-764a-8bf3-0d5ceb61e552
This commit is contained in:
alno 2014-07-01 14:56:56 +00:00
parent 6ce93bfcc3
commit f929cadd41
1 changed files with 9 additions and 2 deletions
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11
src/no/nordicsemi/android/dfu/HexInputStream.java
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@ -16,6 +16,14 @@ import java.io.InputStream;
import no.nordicsemi.android.dfu.exception.HexFileValidationException; import no.nordicsemi.android.dfu.exception.HexFileValidationException;
/**
* Reads the binary content from the HEX file using IntelHex standard: http://www.interlog.com/~speff/usefulinfo/Hexfrmt.pdf
* Truncates the HEX file from all meta data and returns only the BIN content.
* <p>
* In nRF51 chips memory a SoftDevice starts at address 0x1000. From 0x0000 to 0x1000 there is MBR sector (since SoftDevice 7.0.0) which should not be transmitted using DFU. Therefore this class skips
* all data from addresses below 0x1000.
* </p>
*/
public class HexInputStream extends FilterInputStream { public class HexInputStream extends FilterInputStream {
private final int LINE_LENGTH = 16; private final int LINE_LENGTH = 16;
private final byte[] localBuf; private final byte[] localBuf;
@ -26,8 +34,7 @@ public class HexInputStream extends FilterInputStream {
private int available, bytesRead; private int available, bytesRead;
/** /**
* Creates the HEX Input Stream. The constructor calculates the size of the BIN content which is available through {@link #sizeInBytes()}. If HEX file is invalid then the bin size is 0. The * Creates the HEX Input Stream. The constructor calculates the size of the BIN content which is available through {@link #sizeInBytes()}. If HEX file is invalid then the bin size is 0.
* supported line types are: 0 (data), 4 (extended linear address). The type 5 is available of the end of the file.
* *
* @param in * @param in
* the input stream to read from * the input stream to read from