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targets/TARGET_Maxim/TARGET_MAX32625/mxc/tmr_utils.c
- Committer:
- amithy
- Date:
- 2017-11-09
- Revision:
- 178:c26431f84b0d
- Parent:
- 150:02e0a0aed4ec
File content as of revision 178:c26431f84b0d:
/******************************************************************************* * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name of Maxim Integrated * Products, Inc. shall not be used except as stated in the Maxim Integrated * Products, Inc. Branding Policy. * * The mere transfer of this software does not imply any licenses * of trade secrets, proprietary technology, copyrights, patents, * trademarks, maskwork rights, or any other form of intellectual * property whatsoever. Maxim Integrated Products, Inc. retains all * ownership rights. * * $Date: 2016-03-11 11:46:37 -0600 (Fri, 11 Mar 2016) $ * $Revision: 21839 $ * ******************************************************************************/ /** * @file tmr_utils.c * @brief Timer utility functions. */ /***** Includes *****/ #include <stddef.h> #include "mxc_assert.h" #include "tmr.h" #include "tmr_utils.h" /***** Definitions *****/ /***** Globals *****/ /***** Functions *****/ /******************************************************************************/ void TMR_Delay(mxc_tmr_regs_t* tmr, unsigned long us) { TMR_TO_Start(tmr, us); while(TMR_TO_Check(tmr) != E_TIME_OUT) {} } /******************************************************************************/ void TMR_TO_Start(mxc_tmr_regs_t* tmr, unsigned long us) { unsigned clk_shift = 0; uint64_t max_us; uint32_t ticks; // Adjust the clk shift amout by how long the timeout is // Start with the fastest clock to give the greatest accuracy do { max_us = (uint64_t)((0xFFFFFFFFUL / ((uint64_t)SystemCoreClock >> clk_shift++)) * 1000000UL); } while(us > max_us); // Calculate the number of timer ticks we need to wait TMR_Init(tmr, (tmr_prescale_t)clk_shift, NULL); TMR32_TimeToTicks(tmr, us, TMR_UNIT_MICROSEC, &ticks); // Initialize the timer in one-shot mode tmr32_cfg_t cfg; cfg.mode = TMR32_MODE_ONE_SHOT; cfg.compareCount = ticks; TMR32_Stop(tmr); TMR32_Config(tmr, &cfg); TMR32_ClearFlag(tmr); TMR32_Start(tmr); } /******************************************************************************/ int TMR_TO_Check(mxc_tmr_regs_t* tmr) { if(TMR32_GetFlag(tmr)) { return E_TIME_OUT; } return E_NO_ERROR; } /******************************************************************************/ void TMR_TO_Stop(mxc_tmr_regs_t* tmr) { TMR32_Stop(tmr); TMR32_SetCount(tmr, 0x0); } /******************************************************************************/ void TMR_TO_Clear(mxc_tmr_regs_t* tmr) { TMR32_ClearFlag(tmr); TMR32_SetCount(tmr, 0x0); } /******************************************************************************/ unsigned TMR_TO_Elapsed(mxc_tmr_regs_t* tmr) { uint32_t elapsed; tmr_unit_t units; TMR_TicksToTime(tmr, TMR32_GetCount(tmr), &elapsed, &units); switch(units) { case TMR_UNIT_NANOSEC: default: return (elapsed / 1000); case TMR_UNIT_MICROSEC: return (elapsed); case TMR_UNIT_MILLISEC: return (elapsed * 1000); case TMR_UNIT_SEC: return (elapsed * 1000000); } } /******************************************************************************/ unsigned TMR_TO_Remaining(mxc_tmr_regs_t* tmr) { uint32_t remaining_ticks, remaining_time; tmr_unit_t units; remaining_ticks = TMR32_GetCompare(tmr) - TMR32_GetCount(tmr); TMR_TicksToTime(tmr, remaining_ticks, &remaining_time, &units); switch(units) { case TMR_UNIT_NANOSEC: default: return (remaining_time / 1000); case TMR_UNIT_MICROSEC: return (remaining_time); case TMR_UNIT_MILLISEC: return (remaining_time * 1000); case TMR_UNIT_SEC: return (remaining_time * 1000000); } } /******************************************************************************/ void TMR_SW_Start(mxc_tmr_regs_t* tmr) { TMR_TO_Start(tmr, 0xFFFFFFFF); } /******************************************************************************/ unsigned TMR_SW_Stop(mxc_tmr_regs_t* tmr) { unsigned elapsed = TMR_TO_Elapsed(tmr); TMR_TO_Stop(tmr); return elapsed; }