I know this isn't the right forum for this but I can't seem to find a generic PPC mailing list.
I'm trying to get a global timer going on an MPC834x, and the way I learn is to just play with HW, so I've got an Abatron BDI2K hooked up to my processor so I can just manipulate registers without having to deal with writing code. However, I seem to be unable to modify certain registers in the global timers with this set up and I don't understand why. Specifically, if a register has a bit that's a '1' following a reset, I can't change that bit to a '0'. This is happening with the Global Timers Reference Registers (GTRFR1 - 4) and the Global Timers Prescale Registers (GTPSR1 - 4). The reset state of the GTRFRs is 0xFFFF and I can't change it to any other value. The reset state of the GTPSRs is 0x3 and I can't clear the 2 LSB. I can change any other bits in the prescale registers, but not the two which are a '1' at reset. Has anyone else seen this behavior? Bruce _______________________________________________ Linuxppc-embedded mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-embedded
