Fixed for Teensy's, added SPI.transaction (where applicable)

[sumotoy]

The current master doesn't compile with Teensy's, I have added some addition for compile with Teensy's and support for SPI Transactions for processor that support this. I also corrected some tiny warnings. Compliments for this marvellous hardware tiny thing!

[sumotoy]

Tested with Teensy and works. Some example need just small adds for compatibility with Teensy.
The SPI Transaction works with UNO et all 8 bit ones, DUE, Teensy, and recently ESP8266, if SPI transactions are not supported it will automatically avoid the related code and use the standard one.
http://dorkbotpdx.org/blog/paul/spi_transactions_in_arduino

[ArduCAM]

Dear Max,
Thanks for your point out the bugs and help us to fix it and support the Teensy.
I didn't have tried the Teensy, I think I will buy one for try.
What else can I do for you, do you need some samples for our camera modules?

Best Regards,
Lee

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From: max mc costa
Date: 2015-11-27 09:22
To: ArduCAM/Arduino
Subject: Re: [Arduino] Fixed for Teensy's, added SPI.transaction (where applicable) (#7)
Tested with Teensy and works. Some example need just small adds for compatibility with Teensy
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Reply to this email directly or view it on GitHub.

[sumotoy]

Thanks Lee, I'm actually write some more examples for Teensy and some TFT/OLED libraries I already shared in my github.
The only question is about the SPI speed, there's no way to rise up from 8Mhz?

[ArduCAM]

You can rise the SPI speed to 8MHz, but we do face the compatibility problem for Arduino DUE.
The SPI timing is strange on DUE board, we can't make it work even at 4MHz, if we rise ArduCAM's hardware SPI speed to support 8MHz.

From: max mc costa
Date: 2015-11-29 23:49
To: ArduCAM/Arduino
CC: Lee
Subject: Re: [Arduino] Fixed for Teensy's, added SPI.transaction (where applicable) (#7)
Thanks Lee, I'm actually write some more examples for Teensy and some TFT/OLED libraries I already shared in my github.
The only question is about the SPI speed, there's no way to rise up from 8Mhz?
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Reply to this email directly or view it on GitHub.

[utacc]

Lee, was there ever an official version of the software released that included transactions?