Raspberry Pi: Difference between revisions

 

If you get 'Permission Denied' '''do NOT become root!''' This is unnecessary. Instead do:

sudo adduser <user> dialout

This will let your user use serial ports without needing root.

 

To be able to use any floating point operations, such as storing or loading floating point numbers, you need to enable the FPU before using it. To do this, you have to enable access to the coprocessor to whoever should be able to use it, and you have to enable the FPU itself.

 

# enable FPU in coprocessor enable register - this gives everybody access to both locations of coprocessor.

ldr r0, =(0xF << 20)

mcr p15, 0, r0, c1, c0, 2

 

And then enable the FPU itself: