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-</script> -<div id="doc-content"> -<!-- window showing the filter options --> -<div id="MSearchSelectWindow" - onmouseover="return searchBox.OnSearchSelectShow()" - onmouseout="return searchBox.OnSearchSelectHide()" - onkeydown="return searchBox.OnSearchSelectKey(event)"> -<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Groups</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Pages</a></div> - -<!-- iframe showing the search results (closed by default) --> -<div id="MSearchResultsWindow"> -<iframe src="javascript:void(0)" frameborder="0" - name="MSearchResults" id="MSearchResults"> -</iframe> -</div> - -<div class="header"> - <div class="headertitle"> -<div class="title">DAP_TI_Info<div class="ingroups"><a class="el" href="group__DAP__TestInput__gr.html">Test Input Commands</a></div></div> </div> -</div><!--header--> -<div class="contents"> - -<p>Get information about Test Input channel parameters of the CMSIS-DAP Debug Unit. -<a href="#details">More...</a></p> -<p>Get information about Test Input channel parameters of the CMSIS-DAP Debug Unit. </p> -<p>The <b>DAP_TI_Info Command</b> provides information about additional Test Inputs that are possible to capture with the CMSIS-DAP Debug Unit.</p> -<p><b>DAP_TI_Info Request:</b> </p> -<div class="fragment"><div class="line">| BYTE | BYTE | BYTE ***|</div> -<div class="line">> 0x1D | ID | Channel |</div> -<div class="line">|******|******|*********|</div> -</div><!-- fragment --><ul> -<li><b>ID:</b> Request Identifier to obtain information in the Response:<ul> -<li><b>0x00</b> = Get general Test Input channel parameters (<b>Channel</b> value not used).</li> -<li><b>0x01</b> = Get parameters of a specific Test Input <b>Channel</b>.</li> -<li><b>0x02</b> = Get possible data capturing frequencies.</li> -</ul> -</li> -<li><b>Channel:</b> channel number.</li> -</ul> -<p><b>DAP_TI_Info Response for <b>ID=0x00</b>: Get general Test Input channel parameters</b> </p> -<div class="fragment"><div class="line">| BYTE | BYTE ****|</div> -<div class="line">< 0x1D | Channels |</div> -<div class="line">|******|**********|</div> -</div><!-- fragment --><ul> -<li><b>Channels:</b> number of channels available in the Debug Unit.</li> -</ul> -<p><b>DAP_TI_Info Response for <b>ID=0x01</b>: Get parameters of a specific Channel</b> </p> -<div class="fragment"><div class="line">| BYTE | BYTE ***| BYTE ******| BYTE ***| LWORD ***| LWORD *****| BYTE ****| FLOAT *| FLOAT *|</div> -<div class="line">< 0x1D | Channel | Attributes | NumBits | IdString | UnitString | Compress | MinVal | MaxVal |</div> -<div class="line">|******|*********|************|*********|**********|************|**********|++++++++|++++++++|</div> -</div><!-- fragment --><ul> -<li><b>Channel:</b> channel number that information belongs to.</li> -<li><b>Attributes:</b> attributes of the data channel<ul> -<li>Bit 0..1: DataSize: number of bytes recorded (0=BYTE, 1=SHORT, 2=WORD)</li> -<li>Bit 2..3: NumRanges: channel data provides additional range bits (see below)</li> -<li>Bit 4: DT_TimeStamp: 1= channel provides time stamp based on Test Domain Timer</li> -</ul> -</li> -<li><b>NumBits:</b> resolution of the channel in bits</li> -<li><b>IdString:</b> is a up to 8 character 8-bit US ASCII string that identifies the channel</li> -<li><b>UnitString:</b> is a up to 8 character 8-bit US ASCII string that identifies the measurement unit of the channel (V, mA, kHz)</li> -<li><b>Compress:</b> describes the difference communication that is optionally available (see below)</li> -<li><b>MinVal:</b> minimum data value (= 0) represents the <b>MinVal</b>. Repeated for each range.</li> -<li><b>MaxVal:</b> maximum data value result represents the <b>MaxVal</b>. Repeated for each range.</li> -</ul> -<dl class="section note"><dt>Note</dt><dd><b>NoRanges:</b> specifies if the channel data has data ranges; possible values are:<ul> -<li>0 = 1 range (1 MinVal/MaxVal value pair in the response).</li> -<li>1 = 2 ranges (2 MinVal/MaxVal value pairs are provided in the response)</li> -<li>2 = 4 ranges (4 MinVal/MaxVal value pairs are provided in the response)</li> -</ul> -</dd> -<dd> -<b>Compress</b> specifies a method for data differences by this channel.<ul> -<li>0 = no data differences can be communicated. Only <b>Contiguous Value Format</b> is transmitted in <a class="el" href="group__DAP__TI__TransferBlock.html">DAP_TI_TransferBlock</a> Response.</li> -<li>1 = data differences are transmitted when a single bit is different.</li> -<li>2 = new data are transmitted when a value has a significant difference. The least significant 3-bits are ignored. This is useful for A/D values.</li> -<li>3 = new data are transmitted when a value has a significant dynamic difference. Only the uppermost 8-bits are considered. This is useful for dynamic A/D values such as the currency consumption of a device.</li> -</ul> -</dd> -<dd> -<b>Data Value Scaling</b>: the information <b>NoBits</b>, <b>MinVal</b>, <b>MaxVal</b> is used to convert the binary data value into a floating data value for displaying purposes. If both <b>MinVal</b> and <b>MinMax</b> are 0 no scaling formula is provided and raw data may be displayed instead. Scaling considers the <b>NoBits</b> value, for example at 12-bit resolution the maximum data value is 0x3FF.</dd> -<dd> -<b>Data Ranges</b>: the information <b>NoRanges</b>, <b>NoBits</b> allows scaled data value based on range information. The range information is provided in the upper data bits. For example a data channel with NoBits=12 and NRanges=2 provides in bit 0..11 the data value and in bit 12..13 the range value.</dd></dl> -<p><b>Example 1</b>: parameters for a channel that supports voltage measurement </p> -<div class="fragment"><div class="line">IdString = <span class="stringliteral">'U0'</span> <span class="comment">// Voltage symbol for U0 input</span></div> -<div class="line">UnitString = <span class="charliteral">'V'</span>; <span class="comment">// ASCII character to denote voltage</span></div> -<div class="line">NoBits = 10; <span class="comment">// 10 bit A/D resolution</span></div> -<div class="line">NoRanges = 0; <span class="comment">// no ranges are supported</span></div> -<div class="line">Compress = 2; <span class="comment">// data differences may be communicated</span></div> -<div class="line">MinVal = 2.5; <span class="comment">// A/D result = 0x000 represents 2.5V</span></div> -<div class="line">MaxVal = 6.0; <span class="comment">// A/D result = 0x3FF represents 6.0V</span></div> -</div><!-- fragment --><p><b>Example 2</b>: parameters for a channel that supports current measurement with two ranges </p> -<div class="fragment"><div class="line">IdString = <span class="charliteral">'I'</span>; <span class="comment">// Current symbol for I input</span></div> -<div class="line">UnitString = <span class="stringliteral">'mA'</span>; <span class="comment">// ASCII character to denote milli Ampere</span></div> -<div class="line">NoBits = 12; <span class="comment">// 12 bit A/D resolution (bit 0 .. 11 of data values contain A/D result)</span></div> -<div class="line">NoRanges = 1; <span class="comment">// 2 ranges are supported (bit 12 of data values contains range)</span></div> -<div class="line">Compress = 3; <span class="comment">// dynamic data differences may be communicated</span></div> -<div class="line">MinVal[0] = 0; <span class="comment">// A/D result = 0x000 in range 0 represents 0.0mA</span></div> -<div class="line">MaxVal[0] = 1.0; <span class="comment">// A/D result = 0xFFF in range 0 represents 1.0mA</span></div> -<div class="line">MinVal[1] = 4.0; <span class="comment">// A/D result = 0x000 in range 0 represents 4.0mA</span></div> -<div class="line">MaxVal[1] = 20.0; <span class="comment">// A/D result = 0xFFF in range 0 represents 20.0mA</span></div> -</div><!-- fragment --><p>For a channel that reports <b>MinVal = MaxVal = 0</b> the formula needs to be provided by the debugger as the debug unit is using perhaps an external shunt resistor.</p> -<p><b>DAP_TI_Info Response for <b>ID=0x02</b>: Get possible data capturing frequencies for recording of a specific channel</b> </p> -<div class="fragment"><div class="line">| BYTE | BYTE ***| BYTE ********|DWORD ++++|</div> -<div class="line">< 0x1D | Channel | NoSelections |Frequency |</div> -<div class="line">|******|*********|**************|++++++++++| </div> -</div><!-- fragment --><ul> -<li><b>Channel:</b> channel number that information belongs to.<ul> -<li>Channel = 0..0xF: information of the selected channel</li> -<li>Channel = 0xFF: information for common channel data capturing</li> -</ul> -</li> -<li><b>NoSelections:</b> number of possible capture frequencies<ul> -<li>NoSelections = 0: channel does not support data recording</li> -<li>NoSelections = 1..15: channel allows selection of individual data capture frequencies.</li> -<li>NoSelections = 0xFF: channel allows selection of a common data capture frequency.</li> -</ul> -</li> -<li><b>Frequency:</b> capture frequencies (repeated as indicated by NoSelection = 1..15)<ul> -<li>Frequency[0] capture frequency for CapSelect=0 (see DAP_TI_Capture)</li> -<li>Frequency[1] capture frequency for CapSelect=1 (see DAP_TI_Capture)</li> -<li>Frequency[n] capture frequency for CapSelect=n (see DAP_TI_Capture) </li> -</ul> -</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 Thu Nov 16 2017 17:06:00 for CMSIS-DAP by ARM Ltd. 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