Microcontroller specific codes in OS (Contiki)

0
votes

I am working on creating a port for LPC1347 to contiki-os. I have 2 questions:

1: What i do not understand is how would the os know what architecture the hardware follows ie, whether is Harvard architecture or Neumann architecture. The microcontroller has 2 srams, so does the compiler or linker provide the libraries(addresses of memories) for the OS? Also, how does the OS know the address of RAM, is it provided by linker?

2: Contiki does not have device/peripheral driver API so how do i work about adding peripherals? I see there are functions like leds_toggle in apps/shell/shell-blink.c . My question is how can i know what libraries are/would be required to run a basic LED program.

1
operating-systemcontiki

1 Answers

1
votes

The Makefiles select the compiler and pass the appropriate parameters. Have a look at the Makefiles in platform and cpu. They set the compiler (CC) and lots of flags for the compiler (CFLAGS) and linker (LDFLAGS). The platform is selected by setting the TARGET-make-parameter and the platform selects the CPU.

As for the additional question: The make-files also select the files to use for compilation.

Also try running make with V=1, then the calls to the compiler will be printed to th output.