Hi Jihao,
The basic SRecCvt functionality is that it read S-reconds from the input file, fill data into virtual memory map on PC and write this virtual memory map back into the output S-reconds file. The rules for reading the input file and writing output file depends on your configuration (MCU derivative, input/output address format,…).
If I understood correctly, that you want to skip this conversion and do it directly in the bootloader. Correct?
From your description isn’t clear a reason for that step. Could you please clarify it?
Anyway, it is possible, but it will make bootloader more complex.
The SRecCvt converter tool mainly manages (except address format conversion) that:
1. every flash phrase will have just one programming cycle – you don’t need the buffer in MCU RAM the for the whole Flash sector when there will be potentially two different S-records pointed to the same Flash Eg. Separate S-records for FSEC and FPROT byte configuration in Flash. Note: Flash phrase cannot be reprogrammed without sector erase due to ECC.
2. every S-record has exactly 32 bytes and it is aligned to 32 byte boundary. That makes bootloader logic significantly simpler.
Maybe it makes sense to little bit play with the burner.bbl file configuration for output S-Rec files. The bbl syntax is described in "c:\Program Files (x86)\Freescale\CWS12v5.1\Help\PDF\Build_Tools_Utilities.pdf" document.
This will simply allow generating s19 files with addresses in linear(global) address format, but I am not sure whether you will be able to reach the same result as with using SRecCvt tool in order to fulfill above mentioned AN4258 bootloader requirements (32 byte S-record length and alignment, no more than only one S-records referenced any Flash phrase).
Tip: If you just need to skip configuration of SRecCvt graphical user interface and make the conversion more “automatized”, you may start SRecCvt-GUI.exe with pressed Ctrl button. It will open additional Debug Command window where you may see a command line command for conversion and execution log (when you configure GUI and press Convert button). The command from Debug Command window may by lately used as any other post process command….
I hope it helps you.
Have a great day,
Radek
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