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https://git.rwth-aachen.de/acs/public/villas/node/
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93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
/** Timer related helper functions
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*
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* These functions present a simpler interface to Xilinx' Timer Counter driver (XTmrCtr_*)
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @author Daniel Krebs <github@daniel-krebs.net>
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* @copyright 2017, Steffen Vogel
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* @license GNU General Public License (version 3)
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*
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* VILLASfpga
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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#include <xilinx/xtmrctr.h>
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#include "log.hpp"
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#include "fpga/ips/timer.hpp"
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#include "fpga/ips/intc.hpp"
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namespace villas {
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namespace fpga {
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namespace ip {
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// instantiate factory to make available to plugin infrastructure
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static TimerFactory factory;
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bool Timer::init()
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{
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auto logger = getLogger();
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XTmrCtr_Config xtmr_cfg;
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xtmr_cfg.SysClockFreqHz = getFrequency();
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XTmrCtr_CfgInitialize(&xTmr, &xtmr_cfg, getBaseaddr());
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XTmrCtr_InitHw(&xTmr);
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if(dependencies.find("intc") == dependencies.end()) {
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logger->error("No intc");
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return false;
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}
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if(irqs.find("generateout0") == irqs.end()) {
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logger->error("no irq");
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return false;
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}
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intc = reinterpret_cast<InterruptController*>(dependencies["intc"]);
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intc->disableInterrupt(irqs["generateout0"]);
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return true;
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}
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bool Timer::start(uint32_t ticks)
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{
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intc->enableInterrupt(irqs["generateout0"], false);
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XTmrCtr_SetOptions(&xTmr, 0, XTC_EXT_COMPARE_OPTION | XTC_DOWN_COUNT_OPTION);
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XTmrCtr_SetResetValue(&xTmr, 0, ticks);
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XTmrCtr_Start(&xTmr, 0);
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return true;
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}
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bool Timer::wait()
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{
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int count = intc->waitForInterrupt(irqs["generateout0"]);
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intc->disableInterrupt(irqs["generateout0"]);
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return (count == 1);
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}
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uint32_t Timer::remaining()
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{
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return XTmrCtr_GetValue(&xTmr, 0);
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}
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} // namespace ip
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} // namespace fpga
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} // namespace villas
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