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Altera_Forum's avatar
Altera_Forum
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12 years ago

Qsys EPCS configuration issue

Hi guys, I'm new to FPGA programming and I've came across a quite challenging noob issue. I'm using an EP2C5 and I'd like to use the EPCS4 in my board to expand its memory. In Qsys I'm add...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

The EPCS controller doesn't map the EPCS chip directly into the memory space, it just provide SPI registers you can use to read/write the EPCS chip. On the 2ks ou see, the first 1k is in fact a bootloader software that the NIOS can use to boot on a software written in the EPCS, and the other 1k is occupied by the SPI master. To access the EPCS contents, you can use the API provided by the EPCS controller driver.