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Altera_Forum
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13 years ago

Avalon bus with 2 Avalon_MM_ Slaves fails to work (works fine with 1...)

Hi All, I have designed an Avalon bus with 1 Master and 1 Slave, it works greate. I can do write and read just fine. OK, so I added another Master and another Slave, the first Slave at b...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

I would avoid using chipselect for starters. This is from the spec, pay extra attention to the last sentence:

"When present, a slave port ignores all Avalon-MM signals unless

chipselect is asserted. chipselect must be used in

combination with read or write. The chipselect signal is not

necessary; Altera does not recommend using it."

Have you simulated your system to see what is happening at the fabric level? That's typically where I start when debugging issues that resemble this.