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Occasional Contributor

3 years ago

Solved

arria v ds-5 arm compiler inline assembly

Hi, I try to read the cntfreq register in arria V evaluation board , ds-5 arm compiler 5. I use the following line: __asm volatile("mrc p15, 0, %0, c14, c0, 0" : "=r" (val))); compilation f...

Jeet14
3 years ago
Hi,

compiler v7 can have the single line syntax like below-

__asm("[;]");
__asm{[;]}

for reading CNTFREQ, assign global variable with volatile.
And try to run again,

volatile unsigned int freq=0;

void printReg()
{
__asm
{
mrc p15, 0, freq, c14, c0, 0
}
printf("freq=0x%X", freq);
}

let me know if you have any query on this.

Regards
Jeetesh