ARM Assembler on Raspberry Pi

Linux EABI

http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=3105/4 [Linux kernel calling convention]

file:///usr/include/arm-linux-gnueabihf/asm/unistd.h [System calls]

https://community.arm.com/processors/b/blog/posts/useful-assembler-directives-and-macros-for-the-gnu-assembler [Useful assembler directives and macros for gas]

http://bob.cs.sonoma.edu/IntroCompOrg-RPi/intro-co-rpi.html [Bob’s intro to assembler on the RPi]

https://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/os/ [Alex’s into to assembler on the RPi (Model A and Pi zero)]

https://elinux.org/RPi_Low-level_peripherals [PIN Header description]

itoa() base 10

log10(2^32) = 10 ⇒ max 10 characters for 32 bit unsigned

397 10 / ⇒ 39, 7 7 + 48 → [. . . . . . . . . 55] 39 10 / ⇒ 3, 9 9 + 48 → [. . . . . . . . 57 55] 3 ⇒ 0, 3 3 + 48 → [. . . . . . . 51 57 55] 0