Hi.
We use KEIL uV4 IDE and ULINK2 (and an AT91SAM7X512 MCU). We observe the following strange behaviour: The contents of Flash-memory (0x17FEC0) seems to change when we do as follows: 1) Download the code 2) Enter KEIL uV4 Debug mode: addr 17FEC0 shown 0x000000 in Memory Window, not correct contents 3) Push the "RST-icon" (RESET the CPU): addr 17FEC0=0x168968, correct contents ! 4) Run (F5): addr 17FEC0=0x168968, Memory Window still shows correct contents 5) Run to Breakpoint (CUP stops): addr 17FEC0=0x000000, not correct contents! 6) When we single-step in Debug: addr 17FEC0=0x000000, not correct contents 7) AND HWEN WE SINGLE-STEP THE PROGRAM, THE PROGRAM READ VALUE 0 FROM addr 17FEC0 !? But when running the program in KEIL uV4 without single-step, it seems to work OK
We'll appreciate comments on this issue(s).
Best regards Terje Bøhler
Further investigations shows that this might has something to do with differences in accessing the two different planes of the FLASH: 1) When our (audio-)data is placed in the upper plane of the AT91SAM7X512, we/MCU have problems seeing/reading the data (sees wrong contents). 2) But when our (audio-)data is placed (re-located) to the lower plane of the AT91SAM7X512, we/MCU can see/read the data OK.
And, yes, the symbol AT91C_BASE_EFC1 is defined. I'll appreciate suggestions to solve the problem.