Re: Proposed communication protocol between Host and EC for 1.75

2010-05-26 Thread John Watlington
On May 25, 2010, at 10:38 AM, Richard A. Smith wrote: On 05/24/2010 11:03 PM, Mitch Bradley wrote: Another protocol idea is at http://wiki.laptop.org/go/Talk:XO_1.75_HOST_to_EC_Protocol The SPI interface on the CPU is shared with the SPI boot flash. So on boot the CPU has to be master

Re: Proposed communication protocol between Host and EC for 1.75

2010-05-25 Thread Richard A. Smith
On 05/24/2010 11:03 PM, Mitch Bradley wrote: Another protocol idea is at http://wiki.laptop.org/go/Talk:XO_1.75_HOST_to_EC_Protocol The SPI interface on the CPU is shared with the SPI boot flash. So on boot the CPU has to be master and then switch over to slave when the boot it finished. To

Proposed communication protocol between Host and EC for 1.75

2010-05-24 Thread Richard A. Smith
In 1.75 we don't have an LPC bus so we need to create a method for host and EC to communicate. They are connected via a SPI bus.Here's the start of a write up for that interface and a comm protocol. Comments and suggestions welcome. http://wiki.laptop.org/go/XO_1.75_HOST_to_EC_Protocol