• R14 = 0xFFFFFFFD
    Hello I need some help to understand this behaviour. When I run my code (FreeRtos) step by step , into the vPortSVCHandler we call a function with BX R14 , but R14 is shown to be 0xFFFFFFFD .....
  • Accessing the R13, R14 & R15 Registers for ARM7
    Hi, I had written a function for accessing the Special Registers like R13, R14 & R15.. Here Im using LPC2387 controller and the Keil UVsion 3. Its compiled successfully when im entering into deubug...
  • Register Declaration
    I have the follow definitions of my registers : typedef struct { unsigned int var1; unsigned int var2; unsigned int var3; } test; #define pTest ((test *) 0x200000FF) And to access the...
  • Optimizing gcc to use lr / r14 in leaf functions...?
    Note: This was originally posted on 5th November 2009 at http://forums.arm.com Hi everyone, I'm having difficulty convincing gcc to use r14 when cross-compiling C code for my most critical leaf function...
  • Declaration of registers(LPC2103)
    Hi all. May i know how to declare a register for LPC2103? if the bit is 0, symbol is Receiver Data Ready(RDR) and its under Line Status Register(U0LSR). The address is 0xE000 C014. What i know in 8051...