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MATH_DATA & .tmp_data save/restore for FreeRTOS

by Isaac Marino Bavaresco

The port of FreeRTOS for PIC18 with Microchip MPLAB-C18 has some problems when saving and restoring the compiler-generated memory sections "MATH_DATA" and ".tmpdata".

It appears that the FreeRTOS author have only an old version of the MPLAB-C18, and the new versions manage these sections diferently.

The older versions (I don't know what) appear to keep the "MATH_DATA" and ".tmpdata" sections at the very beginning of the RAM. The versions I am using with FreeRTOS (3.xx onwards) let the linker put them at will. Their size appears to change also.

I found a solution that appears to be version-independent (until now at least).


file: /Techref/member/IMB-yahoo-J86/math_data_tmp_data.htm, 1KB, , updated: 2009/7/9 09:03, local time: 2019/1/20 10:16, owner: IMB-yahoo-J86,
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