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targets/TARGET_Maxim/TARGET_MAX32625/mxc/tmr_utils.c@178:c26431f84b0d, 2017-11-09 (annotated)

Committer:
amithy
Date:
Thu Nov 09 22:14:37 2017 +0000
Revision:
178:c26431f84b0d
Parent:
150:02e0a0aed4ec 
test export

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 150:02e0a0aed4ec 1 /*******************************************************************************
<> 150:02e0a0aed4ec 2 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
<> 150:02e0a0aed4ec 3 *
<> 150:02e0a0aed4ec 4 * Permission is hereby granted, free of charge, to any person obtaining a
<> 150:02e0a0aed4ec 5 * copy of this software and associated documentation files (the "Software"),
<> 150:02e0a0aed4ec 6 * to deal in the Software without restriction, including without limitation
<> 150:02e0a0aed4ec 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
<> 150:02e0a0aed4ec 8 * and/or sell copies of the Software, and to permit persons to whom the
<> 150:02e0a0aed4ec 9 * Software is furnished to do so, subject to the following conditions:
<> 150:02e0a0aed4ec 10 *
<> 150:02e0a0aed4ec 11 * The above copyright notice and this permission notice shall be included
<> 150:02e0a0aed4ec 12 * in all copies or substantial portions of the Software.
<> 150:02e0a0aed4ec 13 *
<> 150:02e0a0aed4ec 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
<> 150:02e0a0aed4ec 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
<> 150:02e0a0aed4ec 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
<> 150:02e0a0aed4ec 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
<> 150:02e0a0aed4ec 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
<> 150:02e0a0aed4ec 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
<> 150:02e0a0aed4ec 20 * OTHER DEALINGS IN THE SOFTWARE.
<> 150:02e0a0aed4ec 21 *
<> 150:02e0a0aed4ec 22 * Except as contained in this notice, the name of Maxim Integrated
<> 150:02e0a0aed4ec 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
<> 150:02e0a0aed4ec 24 * Products, Inc. Branding Policy.
<> 150:02e0a0aed4ec 25 *
<> 150:02e0a0aed4ec 26 * The mere transfer of this software does not imply any licenses
<> 150:02e0a0aed4ec 27 * of trade secrets, proprietary technology, copyrights, patents,
<> 150:02e0a0aed4ec 28 * trademarks, maskwork rights, or any other form of intellectual
<> 150:02e0a0aed4ec 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
<> 150:02e0a0aed4ec 30 * ownership rights.
<> 150:02e0a0aed4ec 31 *
<> 150:02e0a0aed4ec 32 * $Date: 2016-03-11 11:46:37 -0600 (Fri, 11 Mar 2016) $
<> 150:02e0a0aed4ec 33 * $Revision: 21839 $
<> 150:02e0a0aed4ec 34 *
<> 150:02e0a0aed4ec 35 ******************************************************************************/
<> 150:02e0a0aed4ec 36
<> 150:02e0a0aed4ec 37 /**
<> 150:02e0a0aed4ec 38 * @file tmr_utils.c
<> 150:02e0a0aed4ec 39 * @brief Timer utility functions.
<> 150:02e0a0aed4ec 40 */
<> 150:02e0a0aed4ec 41
<> 150:02e0a0aed4ec 42 /***** Includes *****/
<> 150:02e0a0aed4ec 43 #include <stddef.h>
<> 150:02e0a0aed4ec 44 #include "mxc_assert.h"
<> 150:02e0a0aed4ec 45 #include "tmr.h"
<> 150:02e0a0aed4ec 46 #include "tmr_utils.h"
<> 150:02e0a0aed4ec 47
<> 150:02e0a0aed4ec 48 /***** Definitions *****/
<> 150:02e0a0aed4ec 49
<> 150:02e0a0aed4ec 50 /***** Globals *****/
<> 150:02e0a0aed4ec 51
<> 150:02e0a0aed4ec 52 /***** Functions *****/
<> 150:02e0a0aed4ec 53
<> 150:02e0a0aed4ec 54 /******************************************************************************/
<> 150:02e0a0aed4ec 55 void TMR_Delay(mxc_tmr_regs_t* tmr, unsigned long us)
<> 150:02e0a0aed4ec 56 {
<> 150:02e0a0aed4ec 57 TMR_TO_Start(tmr, us);
<> 150:02e0a0aed4ec 58
<> 150:02e0a0aed4ec 59 while(TMR_TO_Check(tmr) != E_TIME_OUT) {}
<> 150:02e0a0aed4ec 60 }
<> 150:02e0a0aed4ec 61
<> 150:02e0a0aed4ec 62 /******************************************************************************/
<> 150:02e0a0aed4ec 63 void TMR_TO_Start(mxc_tmr_regs_t* tmr, unsigned long us)
<> 150:02e0a0aed4ec 64 {
<> 150:02e0a0aed4ec 65 unsigned clk_shift = 0;
<> 150:02e0a0aed4ec 66 uint64_t max_us;
<> 150:02e0a0aed4ec 67 uint32_t ticks;
<> 150:02e0a0aed4ec 68
<> 150:02e0a0aed4ec 69 // Adjust the clk shift amout by how long the timeout is
<> 150:02e0a0aed4ec 70 // Start with the fastest clock to give the greatest accuracy
<> 150:02e0a0aed4ec 71 do {
<> 150:02e0a0aed4ec 72 max_us = (uint64_t)((0xFFFFFFFFUL / ((uint64_t)SystemCoreClock >> clk_shift++)) * 1000000UL);
<> 150:02e0a0aed4ec 73 } while(us > max_us);
<> 150:02e0a0aed4ec 74
<> 150:02e0a0aed4ec 75 // Calculate the number of timer ticks we need to wait
<> 150:02e0a0aed4ec 76 TMR_Init(tmr, (tmr_prescale_t)clk_shift, NULL);
<> 150:02e0a0aed4ec 77 TMR32_TimeToTicks(tmr, us, TMR_UNIT_MICROSEC, &ticks);
<> 150:02e0a0aed4ec 78
<> 150:02e0a0aed4ec 79 // Initialize the timer in one-shot mode
<> 150:02e0a0aed4ec 80 tmr32_cfg_t cfg;
<> 150:02e0a0aed4ec 81 cfg.mode = TMR32_MODE_ONE_SHOT;
<> 150:02e0a0aed4ec 82 cfg.compareCount = ticks;
<> 150:02e0a0aed4ec 83 TMR32_Stop(tmr);
<> 150:02e0a0aed4ec 84 TMR32_Config(tmr, &cfg);
<> 150:02e0a0aed4ec 85
<> 150:02e0a0aed4ec 86 TMR32_ClearFlag(tmr);
<> 150:02e0a0aed4ec 87 TMR32_Start(tmr);
<> 150:02e0a0aed4ec 88 }
<> 150:02e0a0aed4ec 89
<> 150:02e0a0aed4ec 90 /******************************************************************************/
<> 150:02e0a0aed4ec 91 int TMR_TO_Check(mxc_tmr_regs_t* tmr)
<> 150:02e0a0aed4ec 92 {
<> 150:02e0a0aed4ec 93 if(TMR32_GetFlag(tmr)) {
<> 150:02e0a0aed4ec 94 return E_TIME_OUT;
<> 150:02e0a0aed4ec 95 }
<> 150:02e0a0aed4ec 96 return E_NO_ERROR;
<> 150:02e0a0aed4ec 97 }
<> 150:02e0a0aed4ec 98
<> 150:02e0a0aed4ec 99 /******************************************************************************/
<> 150:02e0a0aed4ec 100 void TMR_TO_Stop(mxc_tmr_regs_t* tmr)
<> 150:02e0a0aed4ec 101 {
<> 150:02e0a0aed4ec 102 TMR32_Stop(tmr);
<> 150:02e0a0aed4ec 103 TMR32_SetCount(tmr, 0x0);
<> 150:02e0a0aed4ec 104 }
<> 150:02e0a0aed4ec 105
<> 150:02e0a0aed4ec 106 /******************************************************************************/
<> 150:02e0a0aed4ec 107 void TMR_TO_Clear(mxc_tmr_regs_t* tmr)
<> 150:02e0a0aed4ec 108 {
<> 150:02e0a0aed4ec 109 TMR32_ClearFlag(tmr);
<> 150:02e0a0aed4ec 110 TMR32_SetCount(tmr, 0x0);
<> 150:02e0a0aed4ec 111 }
<> 150:02e0a0aed4ec 112
<> 150:02e0a0aed4ec 113 /******************************************************************************/
<> 150:02e0a0aed4ec 114 unsigned TMR_TO_Elapsed(mxc_tmr_regs_t* tmr)
<> 150:02e0a0aed4ec 115 {
<> 150:02e0a0aed4ec 116 uint32_t elapsed;
<> 150:02e0a0aed4ec 117 tmr_unit_t units;
<> 150:02e0a0aed4ec 118
<> 150:02e0a0aed4ec 119 TMR_TicksToTime(tmr, TMR32_GetCount(tmr), &elapsed, &units);
<> 150:02e0a0aed4ec 120
<> 150:02e0a0aed4ec 121 switch(units) {
<> 150:02e0a0aed4ec 122 case TMR_UNIT_NANOSEC:
<> 150:02e0a0aed4ec 123 default:
<> 150:02e0a0aed4ec 124 return (elapsed / 1000);
<> 150:02e0a0aed4ec 125 case TMR_UNIT_MICROSEC:
<> 150:02e0a0aed4ec 126 return (elapsed);
<> 150:02e0a0aed4ec 127 case TMR_UNIT_MILLISEC:
<> 150:02e0a0aed4ec 128 return (elapsed * 1000);
<> 150:02e0a0aed4ec 129 case TMR_UNIT_SEC:
<> 150:02e0a0aed4ec 130 return (elapsed * 1000000);
<> 150:02e0a0aed4ec 131 }
<> 150:02e0a0aed4ec 132 }
<> 150:02e0a0aed4ec 133
<> 150:02e0a0aed4ec 134 /******************************************************************************/
<> 150:02e0a0aed4ec 135 unsigned TMR_TO_Remaining(mxc_tmr_regs_t* tmr)
<> 150:02e0a0aed4ec 136 {
<> 150:02e0a0aed4ec 137 uint32_t remaining_ticks, remaining_time;
<> 150:02e0a0aed4ec 138 tmr_unit_t units;
<> 150:02e0a0aed4ec 139
<> 150:02e0a0aed4ec 140 remaining_ticks = TMR32_GetCompare(tmr) - TMR32_GetCount(tmr);
<> 150:02e0a0aed4ec 141 TMR_TicksToTime(tmr, remaining_ticks, &remaining_time, &units);
<> 150:02e0a0aed4ec 142
<> 150:02e0a0aed4ec 143 switch(units) {
<> 150:02e0a0aed4ec 144 case TMR_UNIT_NANOSEC:
<> 150:02e0a0aed4ec 145 default:
<> 150:02e0a0aed4ec 146 return (remaining_time / 1000);
<> 150:02e0a0aed4ec 147 case TMR_UNIT_MICROSEC:
<> 150:02e0a0aed4ec 148 return (remaining_time);
<> 150:02e0a0aed4ec 149 case TMR_UNIT_MILLISEC:
<> 150:02e0a0aed4ec 150 return (remaining_time * 1000);
<> 150:02e0a0aed4ec 151 case TMR_UNIT_SEC:
<> 150:02e0a0aed4ec 152 return (remaining_time * 1000000);
<> 150:02e0a0aed4ec 153 }
<> 150:02e0a0aed4ec 154 }
<> 150:02e0a0aed4ec 155
<> 150:02e0a0aed4ec 156 /******************************************************************************/
<> 150:02e0a0aed4ec 157 void TMR_SW_Start(mxc_tmr_regs_t* tmr)
<> 150:02e0a0aed4ec 158 {
<> 150:02e0a0aed4ec 159 TMR_TO_Start(tmr, 0xFFFFFFFF);
<> 150:02e0a0aed4ec 160 }
<> 150:02e0a0aed4ec 161
<> 150:02e0a0aed4ec 162 /******************************************************************************/
<> 150:02e0a0aed4ec 163 unsigned TMR_SW_Stop(mxc_tmr_regs_t* tmr)
<> 150:02e0a0aed4ec 164 {
<> 150:02e0a0aed4ec 165 unsigned elapsed = TMR_TO_Elapsed(tmr);
<> 150:02e0a0aed4ec 166 TMR_TO_Stop(tmr);
<> 150:02e0a0aed4ec 167 return elapsed;
<> 150:02e0a0aed4ec 168 }