Follow the Step-By-Step instructions except of 1.2 FlashPrg.c --> Functions should not contain any code that accesses any SFRs
Build the flash loader using the release configuration
Perform a flash download using J-Link Commander. Flash download should report an error during verify
Implement SEGGER_FL_Erase() and retry the flash download test. J-Link Commander should still report verify failed but effected flash memory region should be empty. If not, check SEGGER_FL_Erase().
Implement SEGGER_FL_Program() and retry the flash download test. Expected result: Test reports O.K. --> Programmed successfully. If not, check SEGGER_FL_Program() code