76 lines
4.5 KiB
HTML
Executable file
76 lines
4.5 KiB
HTML
Executable file
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<title>ttcps: Main Page</title>
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<div id="projectname">ttcps
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</div>
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<div id="projectbrief">Xilinx SDK Drivers API Documentation</div>
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<div id="navrow1" class="tabs">
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<ul class="tablist">
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<li class="current"><a href="index.html"><span>Overview</span></a></li>
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<li><a href="annotated.html"><span>Data Structures</span></a></li>
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<li><a href="globals.html"><span>APIs</span></a></li>
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<li><a href="files.html"><span>File List</span></a></li>
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<div class="header">
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<div class="headertitle">
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<div class="title">ttcps Documentation</div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="textblock"><p>This is the driver for one 16-bit timer counter in the Triple Timer Counter (TTC) module in the Ps block.The TTC module provides three independent timer/counter modules that can each be clocked using either the system clock (pclk) or an externally driven clock (ext_clk). In addition, each counter can independently prescale its selected clock input (divided by 2 to 65536). Counters can be set to decrement or increment.</p>
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<p>Each of the counters can be programmed to generate interrupt pulses: . At a regular, predefined period, that is on a timed interval . When the counter registers overflow . When the count matches any one of the three 'match' registers</p>
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<p>Therefore, up to six different events can trigger a timer interrupt: three match interrupts, an overflow interrupt, an interval interrupt and an event timer interrupt. Note that the overflow interrupt and the interval interrupt are mutually exclusive.</p>
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<p><b>Initialization & Configuration</b></p>
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<p>An <a class="el" href="struct_x_ttc_ps___config.html" title="This typedef contains configuration information for the device. ">XTtcPs_Config</a> structure is used to configure a driver instance. Information in the <a class="el" href="struct_x_ttc_ps___config.html" title="This typedef contains configuration information for the device. ">XTtcPs_Config</a> structure is the hardware properties about the device.</p>
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<p>A driver instance is initialized through XTtcPs_CfgInitialize(InstancePtr, CfgPtr, EffectiveAddr). Where CfgPtr is a pointer to the <a class="el" href="struct_x_ttc_ps___config.html" title="This typedef contains configuration information for the device. ">XTtcPs_Config</a> structure, it can be looked up statically through XTtcPs_LookupConfig(DeviceID), or passed in by the caller. The EffectiveAddr can be the static base address of the device or virtual mapped address if address translation is supported.</p>
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<p><b>Interrupts</b></p>
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<p>Interrupt handler is not provided by the driver, as handling of interrupt is application specific.</p>
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<dl class="section note"><dt>Note</dt><dd>The default setting for a timer/counter is:<ul>
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<li>Overflow Mode</li>
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<li>Internal clock (pclk) selected</li>
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<li>Counter disabled</li>
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<li>All Interrupts disabled</li>
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<li>Output waveforms disabled</li>
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</ul>
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</dd></dl>
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<pre>
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MODIFICATION HISTORY:</pre><pre>Ver Who Date Changes
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----- ------ -------- -----------------------------------------------------
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1.00a drg/jz 01/20/10 First release..
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2.0 adk 12/10/13 Updated as per the New Tcl API's
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3.0 pkp 12/09/14 Added support for Zynq Ultrascale Mp.Also code
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modified for MISRA-C:2012 compliance.
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</pre> </div></div><!-- contents -->
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<li class="footer">Copyright © 2015 Xilinx Inc. All rights reserved.</li>
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