QM2000 Coldfire D/A driver programming method - PIO or DMA?

[phoenixlaser]

Hello,

I am wondering if anyone knows what style of driver is used for the QM2000's Coldfire D/A driver (that sends data to the AD669AR's and the TLC7225C's) , whether it uses PIO (Programmed I/O) or DMA (Direct Memory Access) ?

There is a significant difference in performance, such that DMA is much more efficient (and harder to code) than PIO - particularly if the Coldfire is using other devices at the same time (eg: IDE CDROM drive) .

Thanks in advance,


PhoenixLaser

[pangolinlaser]

Hello Phonex and welcome to the Pangolin Forum of LaserFreak.

As you may know, Pangolin is well known for fast and almost unlimited support to our customers, and we even provide support and advice outside of our normal user base, on various ColdFire forums. In fact, if you look closely, you will find articles and even an official Motorola application note that I wrote.

However, the question that you raise is not generic in nature, but specific to our QM2000 board, and so we consider that this is confidential and we would not discuss such a topic in a public forum. Nevertheless, if you would care to write to me with a private email, I am sure we could go further on this topic. Please send email to lasers@pangolin.com


William Benner
Pangolin Laser Systems