11-19-2009 03:07 AM - edited 11-19-2009 02:10 PM
In my design, I have one microblaze processor and one PLB46 bus, for using the DCR interface, I add one PLB46 to DCR bridge IP to the EDK system. two problems emerge after I add this IP:
1: Once I add this IP to the design, the block diagram will not be generated. If I remove this IP, then the block diagram can be generated again
2: I assigned the address to the PLB46 to DCR bridge and connect it to the SPLB, but the address is not mapped to the microblaze processor's address space. (The DCR interface in the PLB46 bus are included.)
The EDK I used is 11.3, and the bus connection can be found in the following fig, what's wrong with it?
11-19-2009 02:13 PM
The picture should display correctly now, the forum doesn't support insert picture directly, I have to upload it somewhere.
11-20-2009 01:36 PM
Can anybody who is using the EDK try this IP to find out why it can not mapped to the microblaze's address space? I am wondering whether that's a bug.
11-21-2009 05:08 AM
Try the following-> go to 'Addresses' tab in the 'System assembly' window and click on 'Generate addresses' button (upper right corner of the tab).
11-21-2009 09:04 AM
12-04-2009 09:56 AM
The issue is that the C_BASEADDR on plbv46_dcr_bridge IP is a BRIDGE type address. So, from a software perspective, these addresses are "invisible". The real addresses are those of peripherals on the other side of the bridge (whatever that might be - tft, etc...).
The XPS address map will show all real addresses as part of address map, but does not show bridge type addreses. This should only be a visual issue as it looks like the batch tools like libgen/platgen still work correctly.
This is a known issue and a defect has been filed to fix this in the future.
12-04-2009 09:59 AM
So to clarify a bit further, you will need to manually update the address info in the GUI, or in the MHS, and should be able to build without any errors.