source: rtems/bsps/powerpc/mvme5500/README.VME

Last change on this file was eb36d11, checked in by Sebastian Huber <sebastian.huber@…>, on Apr 25, 2018 at 1:06:08 PM

bsps: Move documentation, etc. files to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

  • Property mode set to 100644
File size: 896 bytes
Line 
1README.VME: written by S. Kate Feng <feng1@bnl.gov> , 7/22/04
2
3
4Some VME modules(e.g. Oms58 motor controller) might require a PCI sync
5command following the out_xx() function (e.g. out_be16()) if mvme5500 is
6used as the SBC.  The mechanism is a hardware hook to help software
7synchronize between the CPU and PCI activities. The PCI sync is
8implemented in pci/pci_interface.c. For more example of the usage,one
9can reference the drvOMS58.cc file that is posted in synAppRTEMS of
10http://www.nsls.bnl.gov/organization/UserScience/Detectors/Software/Default.htm.
11
12
13In spite of the PCI sync overhead for the Oms58 motor controller, I do
14not see the runtime performance of RTEMS-mvme5500 being compromised as
15compared with that of RTEMS-mvme2307.  For example, it takes the same
16time to run motor_init() of synAppRTEMS for 48 motor initializations
17running either RTEMS-mvme2307 or RTEMS-mvme5500.
18
19 
Note: See TracBrowser for help on using the repository browser.