ESP8266 Community Forum

- Fri May 01, 2015 4:34 pm #16229 Has anyone found any reference to assembly language yet? I have a small piece of code that needs tight control on the timing and compiler tends to kick out some varied code with the smallest of changes.

- Fri May 01, 2015 6:22 pm #16232 To write assembler code inside C:

Code: Select allvoid foo()
{
  asm("  nop");
  asm("  movi.n  a0, 100");
  asm("myloop:");
  asm("  addi     a0, a0, -1");
  asm("  bnez.n   a0, myloop");
}


You can also checkout the assembler code of your compiled C obj:

Code: Select allxtensa-lx106-elf-objdump -d -s <obj-file>


Xtensa architecture documentation (including assembler instruction set)
http://ip.cadence.com/uploads/pdf/xtens ... ndbook.pdf

Hope this help.

- Fri May 01, 2015 7:04 pm #16235 Moin,

you can also look at the assembler code generated by gcc:

http://www.delorie.com/djgpp/v2faq/faq8_20.html

Cal

Get your modules here:

https://www.banggood.com/custlink/KvGGhGF4wG

- Fri May 01, 2015 7:24 pm #16237

Xtensa architecture documentation (including assembler instruction set)
http://ip.cadence.com/uploads/pdf/xtens ... ndbook.pdf

Hope this help.

This is very helpful!

thanks