Currently working a school project where i need to control a servo using only assembly. I cant find anything anywhere that doesn't involve a C program.
I understand the use of PWM i just don't know how to implement it using the Cortex M0 instruction set.
If it's a school project, then:
- review your class notes;
- study the course set books / reading list;
- use the school library;
- talk to your teachers.
"I cant find anything anywhere that doesn't involve a C program"
So take that as a description of what needs to be done - and then code that in assembler.
If i didn't just spend 7 hours yesterday doing what you suggested i would say its a good idea. However, I'm beyond that point. This is why I've come to this forum, to find HELP, not find someone to tell me to go elsewhere.
Why not to refer the corresponding assembly code in disassembly language ?
So what have you found?
Where are you stuck?
"I understand the use of PWM i just don't know how to implement it using the Cortex M0 instruction set."
The KL25 family has hardware PWM - so why try to implement it in software?
It is probably unreasonable to expect code to solve your exact problem to drop out of a Google search, that really not how the world of coding works.
Perhaps focus on your course notes about how to write in assembler and what the compiler does when it translates your C code.
Configuration is likely just a bunch of LDR, STR and MOV instructions, hardly that complicated. The manuals for the part no doubt describe the addresses of various buses and peripherals, and the clocks that drive those peripherals. The peripheral register content at a bit level is also likely described.
Build working C examples, generate .LST files or disassemble with FromELF -c option to get clues.
If this is material the professor is supposed to have taught you challenge them to do their job.
Thank you all for your help. I am going to just write the code in C and call the function from my assembly source file. If anything, I will use the disassembled C code to figure it out. This has been a great learning experience.