On 09/01/16 10:08, Bruce Perens wrote: > There is also Raspberry Pi Zero, which is supposed to cost $5.
Downside with the Pi Zero is zero audio hardware. You'd have to interface an I²S chip yourself. > If you want good battery life you will need to modify David's present > software to be interrupt-driven, to have some sort of hardware squelch > that interrupts when there's a signal to be handled, and to spend most > of its time halted. This is the conventional means of getting battery > efficiency. > > SM1000 currently busy-loops. This makes it run somewhat hotter and it > used more power than otherwise, but mostly nobody cares. The main > economy would come from hardware squelch. From what I've seen, the ADC/DAC drivers seem to operate using DMA and interrupts. That would seem to be most of where the real-time work is being done. I'm slowly moving more things to state machines so one could possibly determine when the CPU can be put to sleep from that. I think power-saving support is a long way off, and even without that, the SM1000 seems to sip power. -- Stuart Longland (aka Redhatter, VK4MSL) I haven't lost my mind... ...it's backed up on a tape somewhere. ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
