5 commits

Author	SHA1	Message	Date
Gregory Nutt	0ff5a0c791	Correct port direction for Arduino MISO signal	2013-07-02 12:37:20 -06:00
Gregory Nutt	bdf96a93db	Revise how delays are calculated in SPI bit bang driver so that we may get a little better frequency resolution	2013-07-01 20:55:36 -06:00
Gregory Nutt	652c33a53a	clean up of SPI bit bang logic	2013-07-01 17:49:43 -06:00
Gregory Nutt	e1dab23711	Add a general bit-bang SPI lower-half driver and implement the bit-bang driver for the Arduino ITEAD TFT shield	2013-07-01 16:50:16 -06:00
Gregory Nutt	8b68ea2f94	Add a general bit-bang SPI upper-half driver	2013-07-01 12:23:26 -06:00