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5916 Discussions

altremote IP usage on cyclone IV E

Altera_Forum
Honored Contributor II
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Hi, 

 

I want to use the altremote IP (Altera remote update) on a cyclone IV E system. An FPGA attached SPI flash contains a factory and an application 

image (addresses 0 and 0x80000). 

 

The factory image boots fine. The design uses a qsys component that has several IPs on the avalon bus. One of these is the altremote IP. 

I can read/write all IPs just fine except the altremote core. I would expect that I can readback the bootaddress from address offset 0x10 

after writing 0x80000 to this reg. But I only get back 0 on every register. 

 

The altremote IP is configure with "Add support for writing configuration parameters" and "Add support for Avalon Interface". 

 

What is the problem? Why is read/write to the bootaddress reg not possible? 

 

The IP userguide mentions fmax=20Mhz for Cyclone IV. What's this fmax? Avalon clock in my case? 

 

All IP register addresses are 32bit aligned, except the RECONFIG register (0x1d). Is this by intention? So I nee to do a byte access 

to this unaligned address? 

 

Quartus version is 16.1. 

 

Regards, 

Matthias
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