Posted by wildfireheart on 2017-03-19 22:05

After investigating output.map I found, that the problem was simple typo. I had buffer declared as

uint8_t buffer2[64000] __attribute__((section("ccmram")));

which I blindly copied from some example on this site and was probably for some different version of HAL. As the correct identifier of core coupled memory in my HAL is .ccmram, not ccmram, linker was putting the buffer into normal RAM, therefore “RAM overflow”. Correct definition is:

uint8_t buffer2[64000] __attribute__((section(".ccmram")));

with which buffer is placed into correct memory:

*(.ccmram)
 .ccmram        0x0000000010000000     0xfa00 Src/main.o
                0x0000000010000000                buffer2
 *(.ccmram*)

Sorry for mistake.