Hello world, bare metal Beagleboard

Question

I\'m trying to get a \'hello world\' type program running on my Beagleboard-xm rev. C, by calling a C puts function from assembly.

So far I\'ve been using t

Answer 1

You can't just blindly write a string of characters to a UART - you need to check status on each character - it works in the single character example because the UART is always going to be ready for the first character, but for the second and subsequent characters you need to poll (or better yet use an ISR, but let's walk before we run).

There's some good example code here: http://hardwarefreak.wordpress.com/2011/08/30/some-experience-with-the-beagleboard-xm-part-2/