• problem of DS5250 xdata varibles in interrupt service routine
    sorry my english is poor... i use c51 v7.00 compiler to develop program on DS5250 . when i use xdata variables in ISR, i find them not work well. for example, a xdata varible and a idata variable...
  • Declaring RAM areas for P89C668 (xdata problems)
    I believe I'm doing something incorrectly, probably relating to how I initialize and tell keil where RAM memory resides at. I'm using the latest version of uVision and C compiler. The P89C668 has 8k...
  • Local varible in same address
    Hi All I write a function like this test.c void a(U8 val) { U8 ch=0; dev[ch].fun1(val); <--this is a function pointer , it will call the b function dev[ch].fun2(val); <--Fail here ...
  • Global varible or Local varibles which is best wrt data memory usage?
    Hi , Which is best local or global variables wrt data memory ?I observed that XData size is getting reduced when I am replacing my global variable with local variable.is there any effect on internal...
  • no error displays if varible re-difined
    char xxxx; char xxxx;//no error displays if varible re-difined //keil c51 OK