//*****************************************************************************
//
//! Provides a small delay.
//!
//! \param ulCount is the number of delay loop iterations to perform.
//!
//! This function provides a means of generating a constant length delay. It
//! is written in assembly to keep the delay consistent across tool chains,
//! avoiding the need to tune the delay based on the tool chain in use.
//!
//! The loop takes 3 cycles/loop.
//!
//! \return None.
//
//*****************************************************************************
#if defined(ewarm) || defined(DOXYGEN)
void
SysCtlDelay(unsigned long ulCount)
{
__asm(" subs r0, #1\n"
" bne.n SysCtlDelay\n"
" bx lr");
}
#endif
#if defined(codered) || defined(gcc) || defined(sourcerygxx)
void __attribute__((naked))
SysCtlDelay(unsigned long ulCount)
{
__asm(" subs r0, #1\n"
" bne SysCtlDelay\n"
" bx lr");
}
#endif
#if defined(rvmdk) || defined(__ARMCC_VERSION)
__asm void
SysCtlDelay(unsigned long ulCount)
{
subs r0, #1;
bne SysCtlDelay;
bx lr;
}
#endif
//
// For CCS implement this function in pure assembly. This prevents the TI
// compiler from doing funny things with the optimizer.
//
#if defined(ccs)
__asm(" .sect \".text:SysCtlDelay\"\n"
" .clink\n"
" .thumbfunc SysCtlDelay\n"
" .thumb\n"
" .global SysCtlDelay\n"
"SysCtlDelay:\n"
" subs r0, #1\n"
" bne.n SysCtlDelay\n"
" bx lr\n");
#endif
sysctl.rar(16.32 KB)
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