Changes between Version 31 and Version 32 of Stuff/FirmwareUpdate

Timestamp:

11/25/10 15:03:52 (13 years ago)

Author:

art

Comment:

--

Stuff/FirmwareUpdate

@@ -29 +29 @@
 
 '''Programming'''
- * Host application must send an Init-Chunk-Message: FF 0A F0 FA FF vh vl nch ncl s2 s1 chk, where:
+ * Host application must send an Init-Chunk-Message: FF 0A F0 FA FF vh vl s2 s1 chk, where:
    * vh:vl - major and minor version numbers of the new firmware
-   * nch:ncl - is a 16 bit number indicating number of the firmware chunks
    * s2:s1 - 16 bit seed number (can be any random number)
  
- * OpenBM acknowledge each chunk (incl. init chunk) with a message: F0 07 FF FB cnh cnl s2 s1 chk, where:
-   * cnh:chl - last received chunk number.
+ * OpenBM acknowledge each chunk (incl. init chunk) with a message: F0 07 FF FB s2 s1 chk, where:
    * s2:sl - seed number received in the init chunk "xor"ed with the 16bit sum of the chunk data written to the flash
-   * "Init"-chunk is acknowledged by 0 chunk number and the same seed received in the init chunk
+   * "Init"-chunk is acknowledged by the same seed as received in the init chunk
 
- * Host application send now data chunks. The chunk size should be either 32, 64 or 128 bytes, FF len F0 FA FF cnh cnl c1 c2 .. cn chk, where:
-   * cnh:cnl - number of the chunk, this number should be increasing with every chunk (so no random access here is possible!)
+ * Host application send now data chunks. The chunk size should be either 32, 64 or 128 bytes, FF len F0 FA FF cnd c1 c2 .. cn chk, where:
+   * cnd - special chunk indicator (0x00 -> Repeat last chunk, 0x10 -> next chunk, 0xFF -> last chunk)
    * c1:cn - chunk of firmware data
 
  * Every chunk is acknowledged by OpenBM device. If acknowledge was wrong (host app should check the seed number), host application can resend the last chunk or stop transmission.
 
- * Host application stop transmission by sending a "Stop"-chunk: FF 06 F0 FA FF FF FF chk. So send this after last chunk was acknowledged.
+ * Host application stop transmission by sending a "Stop"-chunk: FF 05 F0 FA FF FF chk. So send this after last chunk was acknowledged.
 
  * OpenBM bootloader indicate that it does not accept any data anymore by sending: F0 05 FF FB eeh eel chk, where: