https://osmocom.org/https://osmocom.org/favicon.ico?16647414092021-04-06T01:33:15ZOpen Source Mobile CommunicationsSIMtrace 2 - Feature #4042: provide command line interface on CDC-ACM devicehttps://osmocom.org/issues/4042?journal_id=218362021-04-06T01:33:15Zlaforge
<ul><li><strong>Status</strong> changed from <i>New</i> to <i>Rejected</i></li><li><strong>Priority</strong> changed from <i>Normal</i> to <i>Low</i></li></ul><p>the SAM3S has a total of 7 USB endpoints. One is needed for CTRL, leaving 6 EP.</p>
<ul>
<li>three endpoints (IN/OUT/IRQ) are used for card-emulation. IRQ is not strictly neccessary, but useful</li>
<li>if we want to operate CCID in parallel to cardem (for MITM mode), that requires another 3 endpoints (IRQ not needed if we don't need card insert events)</li>
</ul>
<p>So if we want to use the IRQ endpoints, there is simply not sufficient endpoints for a CDC-ACM serial port. I guess we'll keep debug output on the physical DEBUG UART as we do for now.</p>
<p>One could combine (tracer + cdc-acm) or (cardem + cdc-acm) but then once we go for mitm (cardem + ccid), we would have to fall back to the physical DEBUG UART anyway.</p>