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Iam working cygnal microcontrollers, i have declared the following statement before the main , iwant to write data to external memory. i have declared as follows before the main char xdata test_string[100] _at_ 0x5555; my requirements includes as follows. assume if iwant to write 0xf6 into test string at location 0x5555 how i have to write it.when i tried like this test_string[100]=0xf6; but its not writing kindly suggest me
1) for that you declared the valid values are from [0] upto [99]. So next line: test_string[100]=0xf6; should report an error about boundary limit. 2) read about usage of volatile keyword. There is special note about usage this word together with _at_ and XDATA in chapter Absolute Variable Location. It fixes your problems. Regards, Oleg
hello Mr OLEG THANKS FOR YOUR REPLY JOHN E