Hello all,
I'm trying to define an uninitialized section in RAM so that I can save some data when a soft reset occurs. However this section seems to be getting filled with zeros by the scatterload function.
I have defined the variable like this, in saved_ram.cpp:
SavedResetData __attribute__((section("NO_INIT"), zero_init)) reset_data;
The scatter file for my project is:
LR_IROM1 0x00200000 0x00008000 { ; load region size_region ER_IROM1 0x00200000 0x00008000 { ; load address = execution address *.o (RESET, +First) *(InRoot$$Sections) .ANY (+RO) } RW_IRAM1 0x20008100 0x00077F00 { ; RW data .ANY (+RW +ZI) } RW_IRAM2 0x20000000 0x00008000 { foo.o (FOO_BUFFERS) } NO_INIT_SECTION 0x20008000 UNINIT NOCOMPRESS 0x00000100 { saved_ram.o (NO_INIT) } }
In the map file, I can see that the region is created and has the expected attributes:
Execution Region NO_INIT_SECTION (Base: 0x20008000, Size: 0x0000002c, Max: 0x00000100, ABSOLUTE, UNINIT) Base Addr Size Type Attr Idx E Section Name Object 0x20008000 0x0000002c Zero RW 291 NO_INIT saved_ram.o
Any ideas as to why this does not work?
Thanks,
Oliver