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Hi Folks, Does anyone in this forum has experience with memory banking using KEIL C compiler? In the past we have used Winbond W78E516 which only has 64K of flash. We are now moving toward a W77LE532 which has 128K flash because we ran out of code space in the 64K device. Could somebody kindly point me to the right locations/sites etc .. where I can obtain information how to handle memory banking. What do I have to do differently HW/SW to get benefit out of 128K device? Thanks in advance Regards, JIMMY SAYAVONG
It's all in the Manuals - you need to read both the Compiler Manual and the Linker Manual. You should also search the knowledgebase & application notes. I don't know how the Winbond architecture works, but you could look at having the compiler place constants into XDATA instead of CODE, and have the part of your flash holding the constants mapped into XDATA. (this assumes, of course, that you have spare XDATA space) Search for XCONST.
Look in the example folder in your C51 folder. There is a Bank_ex1 project. You will need to modify a copy of L51_BANK.A51 set up the banking in the project. Make sure you emulator handles the banking. you will have to assign each C aor asm file to a bank or the common area. Your set up will depend on the memory map of the chip /board
Hi Neil and Andy, I tried to copy the BANK_EX1 project from C51 directory and changed the device to winbond 77LE532 and each time I tried to compile I got an error message: L51.BANK.A51 eror A90: Call to undefined Macro 'CNT'. Trying to change C51 option I would get a different error: A51 FATAL error File c_root.src ERROR File does not exist A51 terminated Any idea? Thanks, JIMMY
"L51.BANK.A51 eror A90: Call to undefined Macro 'CNT'." Surely the obvious way to solve any "undefined..." error is to provide the appropriate definition?