How can I use GPIF II of FX3 to drive LTC2358?

[Anonymous]

Hi everyone

The following is my design using GPIF II Designer,

but this does not seem to work, how can I modify it?

Or only use the GPIF II connect FPGA to achieve it?

[Anonymous]

Hi,

Make sure the busy signal is set to active high polarity.

The LD_DATA_COUNT is recommended to be called in CNV_On stage.

Make sure the DMA Channel socket and the gpif thread number are matched. (For example, in your project if the dma channel from GPIF to USB used PIB_SOCKET_0, then in the settings of IN_DATA action, thread 0 should be selected and vice versa)

Please debug with the help of a oscilloscope in order to make sure the state machine transition takes place as expected.

Regards,

-Madhu Sudhan

[Anonymous]

I will test it again , Thank you. Madhu Sudhan.

I want to ask again a question, how do I transfer strings by SDI in GPIF II?