<<TableOfContents>>
= Initialize BootLoader =

 Reset ( further Infos here: [[en/SerialProtocol]] )
 {{{
 SendOutData('R', 0, NULL, 0);   }}}

 Enter Bootloader
 {{{
 SEND_CHAR(27);      // ESC
 Delay(20);          
 SEND_CHAR(0xAA);
 Delay(80);           }}}

 Bootloader will send "MKBL" on success

 Get AVR-Signature:
 {{{
 SEND_CHAR('t');   // get signature
 Answer:
 RxBuffer[0] = 0x74 ; RxBuffer[1] = 0x00 = MEGA644
 RxBuffer[0] = 0x76 ; RxBuffer[1] = 0x00 = MEGA8
 RxBuffer[0] = 0x78 ; RxBuffer[1] = 0x00 = MEGA168
 RxBuffer[0] = 0x7A ; RxBuffer[1] = 0x00 = MEGA1284
 RxBuffer[0] = 0xE0 ; RxBuffer[1] = 0x00 = STR91x }}} 

 set Device:
 {{{
 SEND_CHAR('T'); 
 END_CHAR(devicetyp);   // set devicetyp = 0x74 or 0x76 or 0x78 or 0xE0

 Answer:  RxBuffer[0] = 0x0D      // OKAY }}}

 Get Version (!BootBlock)

 {{{
 SEND_CHAR('V');

 Answer:
 RxBuffer[0] = Major;
 RxBuffer[1] = Minor; }}}
        
 Get Buffer Size:
 {{{
 SEND_CHAR('b'); 

 Answer:
 RxBuffer[0] = 'Y'
 (unsigned int) SendBufferSize = RxBuffer[1]* 0x100 + RxBuffer[2];    }}}
               
= Flash Firmware =

 Set size of Flash to clear ( only navi ):
 {{{
 cmd[0] = 'X';
 cmd[1] = (Size >> 16) & 0xFF;
 cmd[2] = (Size >> 8) & 0xFF;
 cmd[3] = Size & 0xFF;
 SEND_BYTES(cmd, 4);
 

 Answer:
 RxBuffer[0] = 0x0D      // OKAY }}}


 clear Flash:
 {{{
 SEND_CHAR('e');

 Answer:
 RxBuffer[0] = 0x0D      // OKAY }}}

        
 Set Adress:
 {{{
 cmd[0] = 'A';
 cmd[1] = 0x00;
 cmd[2] = 0x00;
 SEND_BYTES(cmd, 3);

 Answer
 RxBuffer[0] = 0x0D      // OKAY  }}}
        
 write Block:
 get data from Hex according http://www.schulz-koengen.de/biblio/intelhex.htm
 {{{
 cmd[0] = 'B';
 cmd[1] = (SendBufferSize >> 8) & 0xFF;
 cmd[2] = SendBufferSize & 0xFF;
 cmd[3] = 'F';
 SEND_BYTES(cmd, 4);
 SEND_BYTES(data, SendBufferSize);

 Antwort:
 RxBuffer[0] = 0x0D      // OKAY }}}

 /!\ set buffersize correctly at last block
 /!\ when flashing the Navi-Ctrl you have to add CRC16 to every block - don't increase cmd[1]/cmd[2] with the 2 bytes of the crc

 <<BR>>

 Optional: Read Block to verify written Data (FC only):
 - set Addr to 0x00 ( see above )
 {{{        
 cmd[0] = 'g';
 cmd[1] = (SendBufferSize >> 8) & 0xFF;
 cmd[2] = SendBufferSize & 0xFF;
 cmd[3] = 'F';
 SEND_BYTES(cmd, 4);
        
  Answer:
  1 Block data - sizze according cmd[1] and cmd[2] }}}
        
= Reset Settings =
 /!\ only for FC

 {{{
 cmd[0] = 'B';
 cmd[1] = 0;
 cmd[2] = 4;
 cmd[3] = 'E';
 SEND_BYTES(cmd, 4);

 cmd[0] = 0xFF;
 cmd[1] = 0xFF;
 cmd[2] = 0xFF;
 cmd[3] = 0xFF';
 SEND_BYTES(cmd, 4); }}}

= Exit Bootloader =

 {{{
 SEND_CHAR('E'); }}}

----
CategoryCoding