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Hi,
Please anyone can help me on Code Bank setting configute?.
I'm using at89c52 and 4 32kB EPROM I have using keil example Bank_EX1 as my exercise. I plan to have 4 EPROM as my CODE.
The define in L51_BANK.A51: B_NBANKS = 4 B_MODE = 0 B_RTX = 0 B_VAR_BANKING = 1
In the Option for Target -> Target setting:
Off-chip Code memory:- Eprom: start=0x0000, size=0x4000 Off-chip Xdata memory:- Ram: start=0xD800, size-0x2700
tick Code Banking: Banks: 4 Bank Area: start=0x8000, End=0xFFFF
The above setting is it correct? The acture problem is i can't display the func0 and func1 message. It alway disply the C_root and func2 message only. :(
Do you know why?
Thank you.
Thank for your advice. At this moment i haven't do any existing project yet but I just do for hobby, interested to know how the Banking Switching is work.
May i know why you suggested "better to just start with a processor that doesn't have such limitations and, therefore, doesn't need such bodges?"? Is it any disadvantage? other then wasted many I/O, port's and wiring. Is it affected the speed performents?
Actually, i have using AT89C52 few years already and do alot of small application but this uC internal ROM 8Kb and RAM 256b sometime the size is limited for me. Now i would like to do a selecteble external memory size, easy for me to do testing. At this moment do not plan to change MCU because it is difficult for me to get a special IC in locol. :(
Currently my board have using 2 32Kb SRAM to running the CODE/DATA. I'm using serial to download the Hex data to SRAM, and set the /EA to GND to run the program. If I would like to add another 1 64Kb SRAM or more..What can i do? May i know what i have to do on KEIL compiler STARTUP.A51 and Options for Target?
Please advice..
Thank you very much and thank for your reply.