i want to add the nop instruction in DS-5, but i don't know how?
i has ever use CCS and i know insert the "asm(" NOP");" which can execute the nop instruction.
what can i insert for nop instruction?
Hello zenonxiu
Could you please help @cloud with his question?
Thank you.
With the ARM Compiler (shipped with DS-5) you can use NOP as an assembler instruction and in the compiler as an intrinsic __nop().
For example:
volatile int x;
int z;
int read_variable(int y)
{
int i;
int a = 0;
__nop();
a = x;
return z + y;
}
This is discussed in the DS-5 docs - shipped with the tools and online here:http://infocenter.arm.com/help/topic/com.arm.doc.subset.swdev.ds5/index.html Just search for NOP!
Note that NOP is ok for introducing padding into code for alignment purposes, but it's not guaranteed to generate any delay. Hope that helps.
I used the " __nop()" refer to your provide,but failed again.
It is the error message：
“APP/app.c:486:11: error: implicit declaration of function '__nop' [-Werror=implicit-function-declaration]”
The compilation is passed if i use "__asm__("NOP");" instead of "__nop;'".