Nothing appreciable has changed since the referenced post on 07Nov2011. The PDM microphone built-in to the evaluation board seems very poor. As such, it discredited the board as a viable demo platform.
In case someone had discovered a magic way of making it work, I just did a quick web search on the PDM microphone. However, this seems to only return the discussions on this very mailing list. My past experience with STMicro is that they want committed orders of at least 500K parts per annum (or is it six months?) before tech support will even talk to you. (This isn't necessarily a slight against STMicro; it is just the nature of the modern era of mobile phone market driven electronics.) I haven't expended the effort to try to run the newer, lower-bit-rate versions of Codec2 on the STM32F4 because: a) The Codec2 source code is under development and is, understandably, a moving target. b) The extra codebooks in the newer versions would take a lot more ROM, but thankfully, the STM32F4 has that. However, if the PC CPU utilization is any guide, the newer versions might be ~3X as intensive, and there isn't the headroom in the STM32F4 for this. It seemed to me to make more sense to focus on a PC-based solution. As much as I would prefer an embedded solution, a PC solution is largely "just software". It is comparatively easy to develop for, and the greatest number of users can give it a try. If enough people find a PC-based approach of utility, this provides a path for an optimized embedded solution to follow. Hence, I focused on the tools and source code that I published on the Google code site. 2012/3/4 Ronan Paixão <[email protected]>: > Any news on using the STM32F4 with codec2? I just got my hands on a board > and would love to try it with something awesome like codec2. I believe it > would make a great short-range HT with one of those small 433MHz data radios > like the RFM22 from Hope RF. > --------------8<--------------8<------------- > Ronan Paixão ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
