[chbot] nordic nRF

[Mark Atherton]

Mr B,

The issue is stand alone, ready to use USB / OTG code examples with 
pre-written drivers for MIDI. Also need to consider power and cost constraints.

'Shield onto it' -- never heard that before, beats the hell out of 
having to bother interfacing peripherals !

Mark A, from England, via America.



At 03:49 p.m. 21/05/2013, you wrote:
>Would that be Mark A for American?
>I think you'd have more success with articles than I would with Verilog...
>
>I showed one of these last month ... and there was a comment from 
>someone about its compatibility.
>http://nz.element14.com/freescale-semiconductor/frdm-kl25z/kl25z-freedom-board-arm-dev-board/dp/219186101
>
>It's certainly low power, ARM, in your price range, and the spec 
>sheets suggest a USB host.
>What they don't say is it comes with CooCox IDE, and is supported by mbed.org.
>While its accelerometer isn't calibrated, at least you can plug your 
>shield onto it.
>
>Mark B  .... the other one
>
>
>Mark Atherton wrote:
>>Hi Volker,
>>
>>Ahhah I see the confusion.
>>
>>Both wireless chip types (nRF24L01+ and nRF24LE1) have 
>>transceivers. Last night, the small unit was programmed as RX only, 
>>and the USB Host end as TX only. Since they use enhanced-shockwave 
>>they really should be called PRX and PTX.
>>
>>ARM, yes gorgeous, but is there a readily available USB Host 
>>example that runs using a free toochain, Single chip, Consumes less 
>>than 40mA at 3v3, and Costs less than NZ$10 ?
>>
>>Actually that was Mark B's yourduino.com. Tis I here, Mark A.
>>
>>I suggest we are now Mark A and Mark B otherwise I will have to 
>>start to write articles from Shed Magazine, and he will have to 
>>learn some Verilog :)
>>
>>-Mark A
>>
>>At 02:35 p.m. 21/05/2013, you wrote:
>>>On Tue 21 May 2013 06:15:00 NZST +1200, Mark Atherton wrote:
>>>
>>>Thanks!!
>>>
>>> > If I were to do it all over again I would only buy from 
>>> <http://www.canton-electronics.com/>http://www.canton-electronics.com/
>>> > who also have the nRF24LE1 programmer along with low cost modules on
>>> > 0.1" headers.
>>>
>>>Agreed, good supplier. ebay doesn't seem to cut it most of the time.
>>>
>>>I won't be getting into PIC anything because the effort is far better
>>>spent on getting into ARM, and PIC sucks for all but the 32bit from
>>>MPOV. dspic sounds good but should be replacable with a bigger arm.
>>>
>>>You gave the distinct impression yesterday that one chip is the receiver
>>>and the other the transmitter, so I'm being very confused, but Mark A's
>>>yourduino.com suggests this is not so, and either chip can be used at
>>>either end, but the LE1 has a 8051 included. Now things are looking
>>>clearer.
>>>
>>> > version. SDCC is open and free. Not the highest level of
>>> > optimization, but the price is right and easy to use. The only thing
>>> > that drove me nuts was having to put all of the interrupt handlers
>>> > in the main module.
>>>
>>>Code size is secondary until you run out of space, but for very low
>>>power using the 8051 might be useful, at the cost of fiddling with
>>>another completely different tool chain.
>>>
>>> > Some kind soul has created an SDK
>>> > http://www.diyembedded.com/lib/nrf24le1/nrf24le1_sdk_v1.0.zip he has
>>>
>>>Just looking at the files it looks very good indeed.
>>>
>>>What programmers are available that run on Linux, do you know?
>>>
>>> > Part also has ADC, PWM, UART, GPIO on board - the trick is to find a
>>> > module with required features available.
>>>
>>>You mean a module that connects the QFN pins to some PCB copper?
>>>
>>> > Nordic also do a UHF version that covers 433 / 868 / 920MHz with
>>> > +10dBm TX, but lower data rate. With good RF engineering, this could
>>> > get you kilometres of range...
>>>
>>>Hmmm....
>>>
>>>Thanks Mark for the pointer to these chips, they could be very useful
>>>for something sometime.
>>>
>>>Volker
>>>
>>>--
>>>Volker Kuhlmann
>>>http://volker.dnsalias.net/     Please do not CC list postings to me.
>>>
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>>
>>
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