Bootloader Code Listing (V3.0)
// Fetch the MSB
byteData = (Uint16)ECanaMboxes.MBOX1.MDL.byte.BYTE1; // MS byte
// form the wordData from the MSB:LSB
wordData |= (byteData << 8);
/* Clear all RMPn bits */
ECanaRegs.CANRMP.all = 0xFFFFFFFF;
return wordData;
}
/*
Data frames with a Standard MSGID of 0x1 should be transmitted to the ECAN-A bootloader.
This data will be received in Mailbox1, whose MSGID is 0x1. No message filtering is employed.
Transmit only 2 bytes at a time, LSB first and MSB next. For example, to transmit
the word 0x08AA to the 280x, transmit AA first, followed by 08. Following is the
order in which data should be transmitted:
AA 08 - Keyvalue
00 00 - Part of 8 reserved words stream
00 00 - Part of 8 reserved words stream
00 00 - Part of 8 reserved words stream
00 00 - Part of 8 reserved words stream
00 00 - Part of 8 reserved words stream
00 00 - Part of 8 reserved words stream
00 00 - Part of 8 reserved words stream
00 00 - Part of 8 reserved words stream
bb aa - MS part of 32-bit address (aabb)
dd cc - LS part of 32-bit address (ccdd) - Final Entry-point address = 0xaabbccdd
nn mm - Length of first section (mm nn)
ff ee - MS part of 32-bit address (eeff)
hh gg - LS part of 32-bit address (gghh) - Entry-point address of first section = 0xeeffgghh
xx xx - First word of first section
xx xx - Second word......
...
...
...
xxx - Last word of first section
nn mm - Length of second section (mm nn)
ff ee - MS part of 32-bit address (eeff)
hh gg - LS part of 32-bit address (gghh) - Entry-point address of second section =
0xeeffgghh
xx xx - First word of second section
xx xx - Second word......
...
...
...
xxx - Last word of second section
(more sections, if need be)
00 00 - Section length of zero for next section indicates end of data.
*/
/*
Notes:
------
Summary of changes in ver 2.0, as compared to 1.0
1. Changed the statement
ECanaMboxes.MBOX0.MSGCTRL.all = 0x00000000;
to
ECanaMboxes.MBOX1.MSGCTRL.all = 0x00000000;
since it is MBOX1 that is used, not MBOX0.
SPRU722C – November 2004 – Revised October 2006 Bootloader Code Overview 85
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