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Altera_Forum's avatar
Altera_Forum
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15 years ago

SPI doesn't work at all

Hi, I need collect data from PIC18F4550 by SPI connection. The PIC is the Master running with Polarity = 0 and Phase = 1. The FPGA uses Altera IP SPI (3 wires Serial). All wires [SCK, MIS...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Are you sure that the clock on the FPGA's SPI interface isn't too fast for the PIC controller?

Try to put a signaltap probe on the SPI interface to see what the signals look like.