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Refer to <a class="el" href="group__DAP__Info.html">DAP_Info</a> for more information on how to query the CMSIS-DAP version.</dd></dl> +<p>The <b>DAP_SWD_Sequence Command</b> is used to generate special sequences in SWD mode on the pins SWCLK and SWDIO. For example, for SWD multi-drop target selection (see picture) it is required to put the SWDIO pin to input mode (where it is not driven).</p> +<div class="image"> +<img src="SWD_Sequence.png" alt="SWD_Sequence.png"/> +<div class="caption"> +SWD sequence for multi-drop target selection</div></div> +<ul> +<li>For mode=0 (output: SWDIO is driven), the data for the SWDIO pin are part of the <b>DAP_SWD_Sequence Command</b>.</li> +<li>For mode=1 (input: SWDIO is not driven), the data from the SWDIO pin are captured and returned as part of the <b>DAP_SWD_Sequence Response</b>.</li> +</ul> +<p><b>DAP_SWD_Sequence Command</b>: </p> +<div class="fragment"><div class="line">| BYTE | BYTE **********| BYTE *********| BYTE ******|</div> +<div class="line">> 0x1D | Sequence Count | Sequence Info | SWDIO Data |</div> +<div class="line">|******|****************|<span class="comment">///////////////|++++++++++++|</span></div> +</div><!-- fragment --><ul> +<li><b>Sequence Count</b>: Number of Sequences</li> +<li><b>Sequence Info</b>: Contains number of SWCLK cycles and SWDIO mode<ul> +<li>Bit 5 .. 0: Number of TCK cycles: 1 .. 64 (64 encoded as 0)</li> +<li>Bit 6: reserved</li> +<li>Bit 7: mode: 0=output (SWDIO Data in command), 1=input (SWDIO Data in response)</li> +</ul> +</li> +<li><b>SWDIO Data</b> (only for output mode): Data generated on SWDIO<ul> +<li>One bit for each TCK cycle</li> +<li>LSB transmitted first, padded to BYTE boundary</li> +</ul> +</li> +</ul> +<p><b>DAP_SWD_Sequence Response</b>: </p> +<div class="fragment"><div class="line">| BYTE | BYTE **| BYTE ******|</div> +<div class="line">< 0x1D | Status | SWDIO Data |</div> +<div class="line">|******|********|++++++++++++|</div> +</div><!-- fragment --><ul> +<li><b>SWDIO Data</b> (only for input mode): Data captured from SWDIO<ul> +<li>One bit for each SWCLK cycle for input mode</li> +<li>LSB received first, padded to BYTE boundary</li> +</ul> +</li> +<li><b>Status:</b> <a class="el" href="group__DAP__Response__Status.html">Response Status</a> </li> +</ul> +</div><!-- contents --> +</div><!-- doc-content --> +<!-- start footer part --> +<div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> + <ul> + <li class="footer">Generated on Wed Aug 1 2018 17:12:11 for CMSIS-DAP by Arm Ltd. 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