/technologies/test-and-measurement/b/blog/posts/understand-tinyusb-usbtmc-protocolsIn this post, I attempt to understand the flows that the USBTMC class driver follows for: standard SCPI query / response standard SCPI command only *STB? status byte requests service requests triggers For each scenario, I&#39;ll try to figure...en-USTelligent Community 12https://community.element14.com/technologies/test-and-measurement/b/blog/posts/understand-tinyusb-usbtmc-protocolsWed, 04 Oct 2023 20:40:02 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:5296c02a-ea8d-4190-8469-2b363e709aceDAB0<p>Nice update Jan.</p><img src="https://community.element14.com/aggbug?PostID=26960&AppID=13&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/technologies/test-and-measurement/b/blog/posts/understand-tinyusb-usbtmc-protocolsWed, 04 Oct 2023 17:43:29 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:5296c02a-ea8d-4190-8469-2b363e709aceJan Cumps2<p>&nbsp;[mention:bffbb58a51e44afa8e6e976a48255202:e9ed411860ed4f2ba0265705b8793d05]&nbsp;, the TinyUSB example sets SRQ bit (0x40) in the STB when it receives a SCPI command.&nbsp;<a href="https://github.com/hathach/tinyusb/blob/b394ae1786911a89ea3437d7090cda477ca7df6c/examples/device/usbtmc/src/usbtmc_app.c#L219" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">https://github.com/hathach/tinyusb/blob/b394ae1786911a89ea3437d7090cda477ca7df6c/examples/device/usbtmc/src/usbtmc_app.c#L219</a></p> <p><br />I ported this to the firmware</p> <p>Are you aware that this is normal? I start to expect that this is a test case, not default behaviour ...</p><img src="https://community.element14.com/aggbug?PostID=26960&AppID=13&AppType=Weblog&ContentType=0" width="1" height="1">