On 6/20/2014 8:28 PM, Manuel Berro Madero wrote: > I think that the work arround to get the bit what i am looking for is to > MOV into the register r3 the register r31 with all states then doing right > and left shifting to get that bit. > > Is it r32 a 32 bits? > > I am in the right way?
There is no r32, but all registers (including r31) are 32-bits. But r31 does not have all 32-bits hooked to direct I/O pins, so some bits may always be zero. If you want bit 16 of r31 to be place in r3.t0, with all other bits cleared, you can do this with a couple instructions. I'd probably do something like: Shifts, taking advantage of the PRU's unsigned zero-extend ========= // Put r31 bit 16 in r3 bit 15 LSR R3, R31, 1 // Zero extend r3 word 0, and shift right so bit 15 is bit 0 LSR R3, R3.w0, 15 Shift and mask ========= // Put r31 bit 16 in r3 bit 1 LSR R3, R31, 16 // Mask r3 (only works with 8-bit or shorter masks) AND R3, R3, 0x01 -- Charles Steinkuehler [email protected] -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
