ICP and IAP: Linker

spveer · ‎2012-09-18

Posted on September 18, 2012 at 17:21

Hi,

Is it possible to program only part of the flash memory using ICP? I have STM8 programmed with bootloader using ICP where UBC is protected from 0x8000 to 0x8fff. Now when I try to program the flash with application firmware separately using ICP with CODE settings 0x9000 to 0x9fff, I am encountering an error that UBC is enabled. Why does the programmer care about UBC, when code settings are outside the UBC enabled region? Just to try, I disabled the UBC. But everything in the flash is reprogrammed i.e the UBC region is erased. The MAP file as shown below, however has no code segments in the UBC region.

LINK MAP OF MODULE: DEBUG\STM8_SOFTWARE.AOF (MAIN)
TYPE BASE LENGTH RELOCATION SEGMENT NAME
---- ---- ------ ---------- ------------
* * * * * * * * C O D E M E M O R Y * * * * * * * *
009000H 000080H *** GAP ***
CODE 009080H 000006H AT ?PR??APPLICATION_MAIN?MAIN
009086H 00037AH *** GAP ***
CODE 009400H 000003H AT ?PR??TASK_CHECK_SOFTWARE_UPDATE?TASKS_ALL&#2;

Thank you.