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_MAX32620C/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
Anna Bridge 186:707f6e361f3e 1 /*******************************************************************************
Anna Bridge 186:707f6e361f3e 2 * Copyright (c) 2016,2018 Maxim Integrated Products, Inc., All Rights Reserved.
Anna Bridge 186:707f6e361f3e 3 *
Anna Bridge 186:707f6e361f3e 4 * Permission is hereby granted, free of charge, to any person obtaining a
Anna Bridge 186:707f6e361f3e 5 * copy of this software and associated documentation files (the "Software"),
Anna Bridge 186:707f6e361f3e 6 * to deal in the Software without restriction, including without limitation
Anna Bridge 186:707f6e361f3e 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
Anna Bridge 186:707f6e361f3e 8 * and/or sell copies of the Software, and to permit persons to whom the
Anna Bridge 186:707f6e361f3e 9 * Software is furnished to do so, subject to the following conditions:
Anna Bridge 186:707f6e361f3e 10 *
Anna Bridge 186:707f6e361f3e 11 * The above copyright notice and this permission notice shall be included
Anna Bridge 186:707f6e361f3e 12 * in all copies or substantial portions of the Software.
Anna Bridge 186:707f6e361f3e 13 *
Anna Bridge 186:707f6e361f3e 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
Anna Bridge 186:707f6e361f3e 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
Anna Bridge 186:707f6e361f3e 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
Anna Bridge 186:707f6e361f3e 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
Anna Bridge 186:707f6e361f3e 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
Anna Bridge 186:707f6e361f3e 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
Anna Bridge 186:707f6e361f3e 20 * OTHER DEALINGS IN THE SOFTWARE.
Anna Bridge 186:707f6e361f3e 21 *
Anna Bridge 186:707f6e361f3e 22 * Except as contained in this notice, the name of Maxim Integrated
Anna Bridge 186:707f6e361f3e 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
Anna Bridge 186:707f6e361f3e 24 * Products, Inc. Branding Policy.
Anna Bridge 186:707f6e361f3e 25 *
Anna Bridge 186:707f6e361f3e 26 * The mere transfer of this software does not imply any licenses
Anna Bridge 186:707f6e361f3e 27 * of trade secrets, proprietary technology, copyrights, patents,
Anna Bridge 186:707f6e361f3e 28 * trademarks, maskwork rights, or any other form of intellectual
Anna Bridge 186:707f6e361f3e 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
Anna Bridge 186:707f6e361f3e 30 * ownership rights.
Anna Bridge 186:707f6e361f3e 31 *******************************************************************************
Anna Bridge 186:707f6e361f3e 32 */
Anna Bridge 186:707f6e361f3e 33
Anna Bridge 186:707f6e361f3e 34 #include <stddef.h>
Anna Bridge 186:707f6e361f3e 35 #include "us_ticker_api.h"
Anna Bridge 186:707f6e361f3e 36 #include "tmr.h"
Anna Bridge 186:707f6e361f3e 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
Anna Bridge 186:707f6e361f3e 43
Anna Bridge 186:707f6e361f3e 44 //******************************************************************************
Anna Bridge 186:707f6e361f3e 45 void us_ticker_init(void)
Anna Bridge 186:707f6e361f3e 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;
Anna Bridge 186:707f6e361f3e 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);
Anna Bridge 186:707f6e361f3e 57
Anna Bridge 186:707f6e361f3e 58 NVIC_SetVector(US_TIMER_IRQn, (uint32_t)us_ticker_irq_handler);
Anna Bridge 186:707f6e361f3e 59 NVIC_EnableIRQ(US_TIMER_IRQn);
Anna Bridge 186:707f6e361f3e 60 }
Anna Bridge 186:707f6e361f3e 61
Anna Bridge 186:707f6e361f3e 62 //******************************************************************************
Anna Bridge 186:707f6e361f3e 63 void us_ticker_free(void)
Anna Bridge 186:707f6e361f3e 64 {
Anna Bridge 186:707f6e361f3e 65 US_TIMER->ctrl = 0;
Anna Bridge 186:707f6e361f3e 66 }
Anna Bridge 186:707f6e361f3e 67
Anna Bridge 186:707f6e361f3e 68 //******************************************************************************
Anna Bridge 186:707f6e361f3e 69 uint32_t us_ticker_read(void)
Anna Bridge 186:707f6e361f3e 70 {
Anna Bridge 186:707f6e361f3e 71 return US_TIMER->count32;
Anna Bridge 186:707f6e361f3e 72 }
Anna Bridge 186:707f6e361f3e 73
Anna Bridge 186:707f6e361f3e 74 //******************************************************************************
Anna Bridge 186:707f6e361f3e 75 void us_ticker_set_interrupt(timestamp_t timestamp)
Anna Bridge 186:707f6e361f3e 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);
Anna Bridge 186:707f6e361f3e 83 }
Anna Bridge 186:707f6e361f3e 84
Anna Bridge 186:707f6e361f3e 85 //******************************************************************************
Anna Bridge 186:707f6e361f3e 86 void us_ticker_fire_interrupt(void)
Anna Bridge 186:707f6e361f3e 87 {
Anna Bridge 186:707f6e361f3e 88 NVIC_SetPendingIRQ(US_TIMER_IRQn);
Anna Bridge 186:707f6e361f3e 89 }
Anna Bridge 186:707f6e361f3e 90
Anna Bridge 186:707f6e361f3e 91 //******************************************************************************
Anna Bridge 186:707f6e361f3e 92 void us_ticker_disable_interrupt(void)
Anna Bridge 186:707f6e361f3e 93 {
Anna Bridge 186:707f6e361f3e 94 US_TIMER->inten = 0;
Anna Bridge 186:707f6e361f3e 95 }
Anna Bridge 186:707f6e361f3e 96
Anna Bridge 186:707f6e361f3e 97 //******************************************************************************
Anna Bridge 186:707f6e361f3e 98 void us_ticker_clear_interrupt(void)
Anna Bridge 186:707f6e361f3e 99 {
Anna Bridge 186:707f6e361f3e 100 US_TIMER->intfl = MXC_F_TMR_INTFL_TIMER0;
Anna Bridge 186:707f6e361f3e 101 }
Anna Bridge 186:707f6e361f3e 102
Anna Bridge 186:707f6e361f3e 103 //******************************************************************************
Anna Bridge 186:707f6e361f3e 104 const ticker_info_t* us_ticker_get_info(void)
Anna Bridge 186:707f6e361f3e 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 };
Anna Bridge 186:707f6e361f3e 110
Anna Bridge 186:707f6e361f3e 111 return &info;
Anna Bridge 186:707f6e361f3e 112 }