How to Insert Two Constants Using Srec_Cat?
I Have the Following Script for Srec_Cat. My Goal Is to Insert Two Constants into Known Locations in A. Srec File: Srcfile. Srec # Carve a Hole for and Insert...
I have the following script for srec_cat. My goal is to insert two constants into known locations in a .srec file:
srcfile.srec
# carve a hole for and insert crc byte count
-exclude 0x43c8 0x43cc
-generate 0x43c8 0x43cc -constant-l-e 0x8e2c 4
# carve a hole for and insert crc expected value
-exclude 0x43cc 0x43d0
-generate 0x43cc 0x43d0 -constant-l-e 0x194fa71a 4
# output into new file
-o dstfile.srec
If I comment out either half, the script works without error. But with both present, I get the message:
srec_cat: generate repeat data: multiple 0x000043CC values (previous = 0x00, this one = 0x1A)
I could write out an intermediate file and process it to insert the second constant, but that seems rather heavy handed. Save me from such a hack! :)
1 Answer
I think you need brackets as mentioned in man srec_examples:
Filtering After Joining
There are times when you want to join two sets of data together, and then apply a filter to the joined result. To do this you use parentheses.srec_cat \ '(' \ infile -exclude 0xFFF0 0x10000 \ -generate 0xFFF0 0xFFF8 -repeat‐string 'Bananas ' \ ')' \ -b‐e‐length 0xFFF8 4 \ -b‐e‐checksum‐neg 0xFFFC 4 4 \ -o outfileThe above example command catenates an input file (with the generated data area excluded) with a constant string. This catenated input is then filtered to add a 4‐byte length, and a 4‐byte checksum.
In your case:
srec_cat '(' srcfile.srec -exclude 0x43c8 0x43cc -generate 0x43c8 0x43cc -l-e-constant 0x8e2c 4 ')' -exclude 0x43cc 0x43d0 -generate 0x43cc 0x43d0 -l-e-constant 0x194fa71a 4 -o dstfile.srec
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