Luke Kenneth Casson Leighton
lkcl at lkcl.net
Mon Apr 17 13:29:48 BST 2017
crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Mon, Apr 17, 2017 at 11:05 AM, GaCuest <gacuest at gmail.com> wrote:
> El 17 de abril de 2017 a las 8:57:41, Luke Kenneth Casson Leighton
> (lkcl at lkcl.net) escribió:
>> crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
>> On Mon, Apr 17, 2017 at 12:23 AM, GaCuest wrote:
>> > I think the idea that a cell phone can work without EOMA68
>> > (for basic functions) is a very good idea, but is it difficult to do?
>> > I want to say because you have to do many things 2 times to
>> > be able to work with EOMA68 and without EOMA68.
>> > On the other hand, is the STM32F072 capable of handling
>> > the audio with good quality?
>> not really.... :) ok if you're expecting 48khz 24-bit stereo then
>> forget it. 12 to 14-bit 16khz ... no problem. GSM is waaay below
>> that anyway.
> I mean it is difficult in the sense that you have to provide power
> to EOMA68 and to STM32 separately,
not difficult at all: STM32 receives 3.3v regulated power
(permanently), Card slot receives power under the control of the
STM32. exactly like in the laptop.
> so that only the
> STM32 or the EOMA68 can work when you want.
why would the power need to be mutually exclusive? the STM32 is
low-power enough to be left permanently on, and can be suspended to
ultra-low-power sleep state on demand.
> Why not use the STM32F072 for audio on the laptop?
not good enough dynamic range and quality, and it is still necessary
to have a amplifier. i tried doing audio on an STM32F103RBT6 - i
learned that it would not be enough. i *almost* managed it though.
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