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https://git.rwth-aachen.de/acs/public/villas/node/
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60 lines
1.6 KiB
C++
60 lines
1.6 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 <post@steffenvogel.de>
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* Author: Daniel Krebs <github@daniel-krebs.net>
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* SPDX-FileCopyrightText: 2017 Steffen Vogel <post@steffenvogel.de>
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <cstdint>
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#include <xilinx/xtmrctr.h>
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#include <villas/fpga/ips/intc.hpp>
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#include <villas/fpga/ips/timer.hpp>
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using namespace villas::fpga::ip;
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bool Timer::init() {
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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(registerMemory));
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XTmrCtr_InitHw(&xTmr);
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if (irqs.find(irqName) == irqs.end()) {
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logger->error("IRQ '{}' not found but required", irqName);
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return false;
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}
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// Disable so we don't receive any stray interrupts
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irqs[irqName].irqController->disableInterrupt(irqs[irqName]);
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return true;
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}
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bool Timer::start(uint32_t ticks) {
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irqs[irqName].irqController->enableInterrupt(irqs[irqName], 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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int count = irqs[irqName].irqController->waitForInterrupt(irqs[irqName]);
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irqs[irqName].irqController->disableInterrupt(irqs[irqName]);
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return (count == 1);
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}
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uint32_t Timer::remaining() { return XTmrCtr_GetValue(&xTmr, 0); }
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static char n[] = "timer";
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static char d[] = "Xilinx's programmable timer / counter";
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static char v[] = "xilinx.com:ip:axi_timer:";
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static CorePlugin<Timer, n, d, v> f;
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