altera CRC after configuration

Hi,

i've a board mountig an fpga altera cyclone 4 and uC connected to fpga with 16 i/o pins. In order to program the fpga i've created a software spi, based on SRUNNER, connecting the epcs pins to uC and using the option of dual purpose pins (DCLK,DATA_0,ASDO,flash_nCS).

Now i need to check if the rpd loaded in epcs is correct and i think to use the CRC option in assignments settings; i want also to send a message to micro if an error occured.

Could you give some advises on how implement this mechanism?

Thanks