Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

what's effect of EPM config controller?

hello , i know that the EPM is very useful when power up,it can put the .sof that stored in the flash into FPGA, but, when i config the EPM with an incompatible config_controller.pof,...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Hello ffone13,

Is it correct that you indicate EPM with the configuration CPLD which is installed on the development kits from Altera? Normally the flash holds the configuration data of the FPGA (hex-file) and the CPLD is configuring the FPGA during power-up with the data in the flash. If you program the CPLD with an invalid configuring routine the FPGA will not work until you configure it with the Programmer from Quartus II. So when you power up your board and the FPGA will not be configured out of the flash the Nios IDE can’t detect a working Nios system because it is not there. After configuring the FPGA with the Programmer of Quartus II the Nios IDE should detect the Nios system well.

I hope this helps,

niosIIuser

BTW: Please complete your topic at http://www.niosforum.com/forum/index.php?a...ct=st&f=2&t=667 (http://www.niosforum.com/forum/index.php?act=st&f=2&t=667)