CCS/TMS320F28069: How to program code to flash memory when code is taken byte-by-byte from a hex-file?

Hi Goetz,

How are you trying to program the flash? What tool?

sal

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Hi Goetz,

How are you trying to program the flash? What tool?

sal
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Hi sal,

ok, I should explain what I'm working on:

Currently I'm implementing a *** bootloader *** which resides on up to 2 flash sectors of the target
and shall be able to download an application to remaining free sectors.

-- Initially, both application and the bootloader will be downloaded by the manufacturer,
using CCS' ".out" file together with JTAG. --

-- Later on, the bootloader shall download updates to the application, i.e. overwrite the
existing application. -- An SD card shall be used as a transfer medium for the new appl. version.

Since the structure of an .out file as generated by CCS/compiler/linker is unknown, I cannot
use it to extract an executable image from it which could be downloaded directly.
So, I intend to generate a hex file (S-Record file), then to convert it to binary data which
can be directly written to flash.

*** hex2000.exe *** is used make a hex file from the .out file. After (or better: along with) conversion to binary,
the hex file shall be downloaded to the target. So,
(1.) Hex-to-binary conversion as well as
(2.) downloading, i.e. writing to flash
!!!! shall be done by my bootloader. !!!!

**** The actual problem arises from writing the code to flash: ****
Normally, the controller's memory as well as the hex file are both byte-oriented.
But in our case (i.e. TMS320F28069) the target's memory *** is word-oriented and -adressable ***.

The question I sent with my last posting results from this inconsistency:

For better convenience, I repeat it here:
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This results in following question concerning the transfer to flash,
using TI's compiled flash library:

What must I do:

1. transferring each byte in one 16-bit word, OR
2. Putting each "pair" of 2 bytes into one word (1st byte ==> highbyte; 2nd byte ==> lowbyte) OR
3. Putting each "pair" of 2 bytes into one word (1st byte ==> lowbyte; 2nd byte ==> highbyte)

before transferring that word to flash?

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Best regards
Goetz