Changing the GPIF Waveform Descriptors for the EZ-USB FX2/FX2LP (CY7C68013 /CY7C68013A) On the Fly
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Mar 28, 2011
01:10 AM
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Mar 28, 2011
01:10 AM
Question: What should I be aware of when changing the GPIF waveform descriptors in the middle of a GPIF transfer?
Answer:
GPIF waveform locations should not be changed while the GPIF is in the middle of a transfer. The firmware should first check that the GPIF is IDLE (using "if (GPIFTRIG & 0x80)"). A premature abort (GPIFABORT=0xFF) may also help to ensure that the GPIF is at a ground-zero state.
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