SES: SDK12.2.0: undefined reference to __SRAM_segment_end__

[Erlend]

Earlier (couple of months) I was working on the examples/peripheral/ppi example in SDK12.2.0. I converted the Keil project inside pca10028/blank/arm5_no_packs to a Segger Embedded Studio project and made it run. Project file here. However now I try to compile, flash and debug the program. At first I had strange behaviour due to the default memory map for ARM (samples/MemoryMap_ARM.xml in the SES install directory) signifying Flash and RAM size both 0. I changed to this memory map.

Next, I get the error undefined reference to '__SRAM_segment_end__ in SDK12.2.0/components/toolchain/embedded_studio/ses_nrf51_startup.s (shown here), on line 108.

I didn't change anything in the project or in the SES install directory since the last time I tried to run it (couple of months), successfully.

Any idea how to fix this?

[bjorn-spockeli]

You just have to change the MemorySegment name from RAM to SRAM, i.e. need to correct the memory map to the following

<!DOCTYPE Board_Memory_Definition_File>
<root name="nRF51422_xxAC">
  <MemorySegment name="FLASH" start="0x00000000" size="0x00040000" access="ReadOnly" />
  <MemorySegment name="SRAM" start="0x20000000" size="0x00008000" access="Read/Write" />
</root>

[vishi]

hi bojorn,

what changes need to make for solution to work with nrf52840?

[bjorn-spockeli]

vishi: There should be a nRF52840 DK PPI example for SES in the latest SDK, i.e. v17. You'll find it in examples\peripheral\ppi\pca10056\blank\ses.