Changes between Version 19 and Version 20 of Stuff/FirmwareUpdate


Ignore:
Timestamp:
11/16/10 21:15:11 (13 years ago)
Author:
art
Comment:

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  • Stuff/FirmwareUpdate

    v19 v20  
    2525 
    2626'''Programming''' 
    27  * Host application must send an Init-Chunk-Message: FF 07 F0 FA FF 00 nch ncl chk, where nch:ncl - is a 16 bit number indicating number of the firmware chunks  
     27 * Host application must send an Init-Chunk-Message: FF 0B F0 FA FF 00 vh vl nch s2 s1 ncl chk, where: 
     28   * vh:vl - major and minor version numbers of the new firmware 
     29   * nch:ncl - is a 16 bit number indicating number of the firmware chunks 
     30   * s2:s1 - 16 bit seed number (can be any random number) 
     31  
     32 * OpenBM acknowledge each chunk (incl. init chunk) with a message: F0 07 FF FB cnh cnl s2 s1 chk, where: 
     33   * cnh:chl - last received chunk number, so indicating that this chunk was written well 
     34   * s2:sl - seed number received in the init chunk "xor"ed with the 16bit sum of the chunk written to the flash 
     35 
     36 * Host application send now firmware chunks. The chunk size should be either 32, 64 or 128 bytes, FF len F0 FA FF cnh cnl c1 c2 .. cn chk, where: 
     37   * cnh:cnl - number of the chunk, this number should be increasing with every chunk (so no random access here is possible!) 
     38   * c1:cn - chunk of firmware data 
     39 
     40 * Every chunk is acknowledged by OpenBM device. If acknowledge was wrong, host application should stop transmitting. 
     41 
     42 * Transmission is stopped when either last chunk was received (bootloader will jump to application) or when a "Stop"-chunk received: FF 06 F0 FA FF FF FF chk