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Getting an Idea related to Transmission on TX Port When Sending RX-Related Commands in PULPissimo's SPI Peripheral #410

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kasunb-accelr opened this issue Apr 2, 2024 · 1 comment
Open

Getting an Idea related to Transmission on TX Port When Sending RX-Related Commands in PULPissimo's SPI Peripheral #410

kasunb-accelr opened this issue Apr 2, 2024 · 1 comment

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@kasunb-accelr
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kasunb-accelr commented Apr 2, 2024 •
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I am recently developing VIPs and a reusable UVM verification environment for PULP uDMA peripheral IPs.

While I was developing, I encountered an unexpected behavior with the SPI peripheral in PULPissimo. Specifically, when sending commands exclusively related to RX (receive), the TX (transmit) port unexpectedly transmits the word-size. This behavior is puzzling, and I'm wondering if there's a specific reason behind it.

Any insights regarding this behavior would be greatly appreciated. Thank you!
@bluewww
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bluewww commented Apr 8, 2024 •
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Can you maybe explain in more detail what

  1. you are observing and
  2. you are expecting?

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@bluewww @kasunb-accelr