/* Timer related helper functions * * These functions present a simpler interface to Xilinx' Timer Counter driver (XTmrCtr_*) * * Author: Steffen Vogel <post@steffenvogel.de> * Author: Daniel Krebs <github@daniel-krebs.net> * SPDX-FileCopyrightText: 2017 Steffen Vogel <post@steffenvogel.de> * SPDX-License-Identifier: Apache-2.0 */ #include <cstdint> #include <xilinx/xtmrctr.h> #include <villas/fpga/ips/intc.hpp> #include <villas/fpga/ips/timer.hpp> using namespace villas::fpga::ip; bool Timer::init() { XTmrCtr_Config xtmr_cfg; xtmr_cfg.SysClockFreqHz = getFrequency(); XTmrCtr_CfgInitialize(&xTmr, &xtmr_cfg, getBaseAddr(registerMemory)); XTmrCtr_InitHw(&xTmr); if (irqs.find(irqName) == irqs.end()) { logger->error("IRQ '{}' not found but required", irqName); return false; } // Disable so we don't receive any stray interrupts irqs[irqName].irqController->disableInterrupt(irqs[irqName]); return true; } bool Timer::start(uint32_t ticks) { irqs[irqName].irqController->enableInterrupt(irqs[irqName], false); XTmrCtr_SetOptions(&xTmr, 0, XTC_EXT_COMPARE_OPTION | XTC_DOWN_COUNT_OPTION); XTmrCtr_SetResetValue(&xTmr, 0, ticks); XTmrCtr_Start(&xTmr, 0); return true; } bool Timer::wait() { int count = irqs[irqName].irqController->waitForInterrupt(irqs[irqName]); irqs[irqName].irqController->disableInterrupt(irqs[irqName]); return (count == 1); } uint32_t Timer::remaining() { return XTmrCtr_GetValue(&xTmr, 0); } static char n[] = "timer"; static char d[] = "Xilinx's programmable timer / counter"; static char v[] = "xilinx.com:ip:axi_timer:"; static CorePlugin<Timer, n, d, v> f;