Calculating program-memory from hex-file

[Frank Steinberg]

Hi!

I noticed, that the size of program memory for AVR differs from that what is calculated by avrdude (while programming) and avr-size (folder AVRDude, used by avrdudess). If I compile this demo source:
https://sourceforge.net/p/gcbasic/code/HEAD/tree/GCBASIC/trunk/Demos/first-start-sample.gcb
avr-size reports 124 byte and
avrdude reports 176 byte.

As far as i understood, the programs use two different ways to calculate the memory size in a hex-file:
avr-size ...
adds the count of every data-record-row.
avrdude ...
evaluates only the last data-record-row. Here it adds the 'Record-Length' with the 'Load-Offset'.

IMO GCB has a bug calculating the 'Record-Length' value. If the Record-Length is 02 bytes, the Load-Offset has to be increased by 2, not by 4 (as it's done with the 16-byte (10hex)-records at the bottom of the file).

Hex-file after compiling first-start-sample.gcb:

:020000020000FC
:0200000033C00B
:0200040018954D
:02000800189549
 ||  ||
 ||  Load-Offset
 Record-Length

... and so on

:020064001895ED
:1000680058E05EBF5FEF5DBF18D0259A2D9AD4E6A1
:10007800E0E007D02D98D4E8E3E003D0F7CF8895E7
:10008800FECFE395AEEF94E19A95F1F7AA95D9F7EB
:10009800DA95C1F7EA95B1F7089550E055B950E0FF
:0800A80058B950E05BB908955E
 ||  ||
 avddude adds: 08hex + A8hex = 8 + 168 = 176

:00000001FF

I don't know if this has any effects to the loaded programs itself.
Btw:
GCBs report-file still says "Program Memory: 38/16384 words"

Regards
Frank

[Anobium]

Thanks. These are known issues and is on the release plan for 0.96. Your posting is actaully a better explaination of the issue.

Our users need to be aware of this and I will include a list of know issues in 0.95.

Anobium