mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_Maxim/TARGET_MAX32625/us_ticker.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
186:707f6e361f3e 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 150:02e0a0aed4ec 1 /*******************************************************************************
Anna Bridge 186:707f6e361f3e 2 * Copyright (c) 2016,2018 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 */
<> 150:02e0a0aed4ec 33
<> 150:02e0a0aed4ec 34 #include <stddef.h>
<> 150:02e0a0aed4ec 35 #include "us_ticker_api.h"
<> 150:02e0a0aed4ec 36 #include "tmr.h"
<> 150:02e0a0aed4ec 37
Anna Bridge 186:707f6e361f3e 38 #define US_TIMER MXC_TMR0
Anna Bridge 186:707f6e361f3e 39 #define US_TIMER_IRQn TMR0_0_IRQn
Anna Bridge 186:707f6e361f3e 40 #define US_TIMER_PRESCALE TMR_PRESCALE_DIV_2_5
Anna Bridge 186:707f6e361f3e 41 #define US_TIMER_MODE TMR32_MODE_COMPARE
Anna Bridge 186:707f6e361f3e 42 #define US_TIMER_WIDTH 32
<> 150:02e0a0aed4ec 43
<> 150:02e0a0aed4ec 44 //******************************************************************************
<> 150:02e0a0aed4ec 45 void us_ticker_init(void)
<> 150:02e0a0aed4ec 46 {
Anna Bridge 186:707f6e361f3e 47 // Disable and deconfigure
Anna Bridge 186:707f6e361f3e 48 US_TIMER->ctrl = 0;
Anna Bridge 186:707f6e361f3e 49 US_TIMER->term_cnt32 = 0;
Anna Bridge 186:707f6e361f3e 50 US_TIMER->inten = 0;
Anna Bridge 186:707f6e361f3e 51 US_TIMER->intfl = MXC_F_TMR_INTFL_TIMER0;
<> 150:02e0a0aed4ec 52
Anna Bridge 186:707f6e361f3e 53 // Configure and enable
Anna Bridge 186:707f6e361f3e 54 US_TIMER->ctrl = MXC_F_TMR_CTRL_ENABLE0 |
Anna Bridge 186:707f6e361f3e 55 (US_TIMER_MODE << MXC_F_TMR_CTRL_MODE_POS) |
Anna Bridge 186:707f6e361f3e 56 (US_TIMER_PRESCALE << MXC_F_TMR_CTRL_PRESCALE_POS);
<> 150:02e0a0aed4ec 57
Anna Bridge 186:707f6e361f3e 58 NVIC_SetVector(US_TIMER_IRQn, (uint32_t)us_ticker_irq_handler);
<> 150:02e0a0aed4ec 59 NVIC_EnableIRQ(US_TIMER_IRQn);
<> 150:02e0a0aed4ec 60 }
<> 150:02e0a0aed4ec 61
<> 150:02e0a0aed4ec 62 //******************************************************************************
Anna Bridge 186:707f6e361f3e 63 void us_ticker_free(void)
<> 150:02e0a0aed4ec 64 {
Anna Bridge 186:707f6e361f3e 65 US_TIMER->ctrl = 0;
<> 150:02e0a0aed4ec 66 }
<> 150:02e0a0aed4ec 67
<> 150:02e0a0aed4ec 68 //******************************************************************************
<> 150:02e0a0aed4ec 69 uint32_t us_ticker_read(void)
<> 150:02e0a0aed4ec 70 {
Anna Bridge 186:707f6e361f3e 71 return US_TIMER->count32;
<> 150:02e0a0aed4ec 72 }
<> 150:02e0a0aed4ec 73
<> 150:02e0a0aed4ec 74 //******************************************************************************
<> 150:02e0a0aed4ec 75 void us_ticker_set_interrupt(timestamp_t timestamp)
<> 150:02e0a0aed4ec 76 {
Anna Bridge 186:707f6e361f3e 77 US_TIMER->ctrl = 0;
Anna Bridge 186:707f6e361f3e 78 US_TIMER->term_cnt32 = (timestamp) ? timestamp : 1;
Anna Bridge 186:707f6e361f3e 79 US_TIMER->inten = MXC_F_TMR_INTEN_TIMER0;
Anna Bridge 186:707f6e361f3e 80 US_TIMER->ctrl = MXC_F_TMR_CTRL_ENABLE0 |
Anna Bridge 186:707f6e361f3e 81 (US_TIMER_MODE << MXC_F_TMR_CTRL_MODE_POS) |
Anna Bridge 186:707f6e361f3e 82 (US_TIMER_PRESCALE << MXC_F_TMR_CTRL_PRESCALE_POS);
<> 150:02e0a0aed4ec 83 }
<> 150:02e0a0aed4ec 84
AnnaBridge 182:a56a73fd2a6f 85 //******************************************************************************
AnnaBridge 174:b96e65c34a4d 86 void us_ticker_fire_interrupt(void)
AnnaBridge 174:b96e65c34a4d 87 {
Anna Bridge 186:707f6e361f3e 88 NVIC_SetPendingIRQ(US_TIMER_IRQn);
AnnaBridge 174:b96e65c34a4d 89 }
AnnaBridge 174:b96e65c34a4d 90
<> 150:02e0a0aed4ec 91 //******************************************************************************
<> 150:02e0a0aed4ec 92 void us_ticker_disable_interrupt(void)
<> 150:02e0a0aed4ec 93 {
Anna Bridge 186:707f6e361f3e 94 US_TIMER->inten = 0;
<> 150:02e0a0aed4ec 95 }
<> 150:02e0a0aed4ec 96
<> 150:02e0a0aed4ec 97 //******************************************************************************
<> 150:02e0a0aed4ec 98 void us_ticker_clear_interrupt(void)
<> 150:02e0a0aed4ec 99 {
Anna Bridge 186:707f6e361f3e 100 US_TIMER->intfl = MXC_F_TMR_INTFL_TIMER0;
<> 150:02e0a0aed4ec 101 }
<> 150:02e0a0aed4ec 102
<> 150:02e0a0aed4ec 103 //******************************************************************************
Anna Bridge 186:707f6e361f3e 104 const ticker_info_t* us_ticker_get_info(void)
<> 150:02e0a0aed4ec 105 {
Anna Bridge 186:707f6e361f3e 106 static const ticker_info_t info = {
Anna Bridge 186:707f6e361f3e 107 RO_FREQ >> US_TIMER_PRESCALE,
Anna Bridge 186:707f6e361f3e 108 US_TIMER_WIDTH
Anna Bridge 186:707f6e361f3e 109 };
<> 150:02e0a0aed4ec 110
Anna Bridge 186:707f6e361f3e 111 return &info;
<> 150:02e0a0aed4ec 112 }