--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Mon, Apr 17, 2017 at 11:05 AM, GaCuest gacuest@gmail.com wrote:
El 17 de abril de 2017 a las 8:57:41, Luke Kenneth Casson Leighton (lkcl@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.
l.