Umar Naeem / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by Umar Naeem

targets/TARGET_WIZNET/TARGET_W7500x/us_ticker.c@165:2dd56e6daeec, 2017-05-23 (annotated)

Committer:
ranaumarnaeem
Date:
Tue May 23 12:54:50 2017 +0000
Revision:
165:2dd56e6daeec
Parent:
149:156823d33999 
jhjg

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 *******************************************************************************
<> 144:ef7eb2e8f9f7 3 * Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
<> 144:ef7eb2e8f9f7 4 * All rights reserved.
<> 144:ef7eb2e8f9f7 5 *
<> 144:ef7eb2e8f9f7 6 * Redistribution and use in source and binary forms, with or without
<> 144:ef7eb2e8f9f7 7 * modification, are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 8 *
<> 144:ef7eb2e8f9f7 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 10 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 12 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 13 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 14 * 3. Neither the name of ARM Limited nor the names of its contributors
<> 144:ef7eb2e8f9f7 15 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 16 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 17 *
<> 144:ef7eb2e8f9f7 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 28 *******************************************************************************
<> 144:ef7eb2e8f9f7 29 */
<> 144:ef7eb2e8f9f7 30
<> 144:ef7eb2e8f9f7 31 #include <stddef.h>
<> 144:ef7eb2e8f9f7 32 #include "us_ticker_api.h"
<> 144:ef7eb2e8f9f7 33 #include "PeripheralNames.h"
<> 144:ef7eb2e8f9f7 34 #include "system_W7500x.h"
<> 144:ef7eb2e8f9f7 35 #include "W7500x_dualtimer.h"
<> 144:ef7eb2e8f9f7 36 #include "W7500x_pwm.h"
<> 144:ef7eb2e8f9f7 37
<> 144:ef7eb2e8f9f7 38 #define TIMER_0 DUALTIMER0_0
<> 144:ef7eb2e8f9f7 39 #define TIMER_1 PWM_CH1
<> 144:ef7eb2e8f9f7 40 #define TIMER_IRQn DUALTIMER0_IRQn
<> 144:ef7eb2e8f9f7 41
<> 144:ef7eb2e8f9f7 42 static PWM_TimerModeInitTypeDef TimerInitType;
<> 144:ef7eb2e8f9f7 43 static DUALTIMER_InitTypDef TimerHandler;
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 static int us_ticker_inited = 0;
<> 144:ef7eb2e8f9f7 46
<> 144:ef7eb2e8f9f7 47
<> 144:ef7eb2e8f9f7 48 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 49 extern "C"{
<> 144:ef7eb2e8f9f7 50 #endif
<> 144:ef7eb2e8f9f7 51
<> 144:ef7eb2e8f9f7 52 void DUALTIMER0_Handler(void)
<> 144:ef7eb2e8f9f7 53 {
<> 144:ef7eb2e8f9f7 54 if(DUALTIMER_GetIntStatus(DUALTIMER0_0))
<> 144:ef7eb2e8f9f7 55 {
<> 144:ef7eb2e8f9f7 56 DUALTIMER_IntClear(DUALTIMER0_0);
<> 144:ef7eb2e8f9f7 57 us_ticker_irq_handler();
<> 144:ef7eb2e8f9f7 58 }
<> 144:ef7eb2e8f9f7 59 }
<> 144:ef7eb2e8f9f7 60
<> 144:ef7eb2e8f9f7 61 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 62 }
<> 144:ef7eb2e8f9f7 63 #endif
<> 144:ef7eb2e8f9f7 64
<> 144:ef7eb2e8f9f7 65 void us_ticker_init(void)
<> 144:ef7eb2e8f9f7 66 {
<> 144:ef7eb2e8f9f7 67 if (us_ticker_inited) return;
<> 144:ef7eb2e8f9f7 68 us_ticker_inited = 1;
<> 144:ef7eb2e8f9f7 69
<> 144:ef7eb2e8f9f7 70 SystemCoreClockUpdate();
<> 144:ef7eb2e8f9f7 71 TimerInitType.PWM_CHn_PR = (GetSystemClock() / 1000000) -1;
<> 144:ef7eb2e8f9f7 72 TimerInitType.PWM_CHn_LR = 0xFFFFFFFF;
<> 144:ef7eb2e8f9f7 73 TimerInitType.PWM_CHn_PDMR = 1;
<> 144:ef7eb2e8f9f7 74
<> 144:ef7eb2e8f9f7 75 PWM_TimerModeInit(TIMER_1, &TimerInitType);
<> 144:ef7eb2e8f9f7 76 PWM_CHn_Start(TIMER_1);
<> 144:ef7eb2e8f9f7 77 }
<> 144:ef7eb2e8f9f7 78
<> 144:ef7eb2e8f9f7 79
<> 144:ef7eb2e8f9f7 80 uint32_t us_ticker_read()
<> 144:ef7eb2e8f9f7 81 {
<> 144:ef7eb2e8f9f7 82 if (!us_ticker_inited) us_ticker_init();
<> 144:ef7eb2e8f9f7 83 return (TIMER_1->TCR);
<> 144:ef7eb2e8f9f7 84 }
<> 144:ef7eb2e8f9f7 85
<> 144:ef7eb2e8f9f7 86
<> 144:ef7eb2e8f9f7 87 void us_ticker_set_interrupt(timestamp_t timestamp)
<> 144:ef7eb2e8f9f7 88 {
<> 144:ef7eb2e8f9f7 89 int32_t dev = 0;
<> 144:ef7eb2e8f9f7 90
<> 144:ef7eb2e8f9f7 91 if (!us_ticker_inited)
<> 144:ef7eb2e8f9f7 92 {
<> 144:ef7eb2e8f9f7 93 us_ticker_init();
<> 144:ef7eb2e8f9f7 94 }
<> 144:ef7eb2e8f9f7 95
<> 144:ef7eb2e8f9f7 96 dev = (int32_t)(timestamp - us_ticker_read());
<> 144:ef7eb2e8f9f7 97 dev = dev * ((GetSystemClock() / 1000000) / 16);
<> 144:ef7eb2e8f9f7 98
<> 144:ef7eb2e8f9f7 99 if(dev <= 0)
<> 144:ef7eb2e8f9f7 100 {
<> 144:ef7eb2e8f9f7 101 us_ticker_irq_handler();
<> 144:ef7eb2e8f9f7 102 return;
<> 144:ef7eb2e8f9f7 103 }
<> 144:ef7eb2e8f9f7 104
<> 144:ef7eb2e8f9f7 105 DUALTIMER_ClockEnable(TIMER_0);
<> 144:ef7eb2e8f9f7 106 DUALTIMER_Stop(TIMER_0);
<> 144:ef7eb2e8f9f7 107
<> 144:ef7eb2e8f9f7 108 TimerHandler.TimerControl_Mode = DUALTIMER_TimerControl_Periodic;
<> 144:ef7eb2e8f9f7 109 TimerHandler.TimerControl_OneShot = DUALTIMER_TimerControl_OneShot;
<> 144:ef7eb2e8f9f7 110 TimerHandler.TimerControl_Pre = DUALTIMER_TimerControl_Pre_16;
<> 144:ef7eb2e8f9f7 111 TimerHandler.TimerControl_Size = DUALTIMER_TimerControl_Size_32;
<> 144:ef7eb2e8f9f7 112
<> 144:ef7eb2e8f9f7 113 TimerHandler.TimerLoad = (uint32_t)dev;
<> 144:ef7eb2e8f9f7 114
<> 144:ef7eb2e8f9f7 115 DUALTIMER_Init(TIMER_0, &TimerHandler);
<> 144:ef7eb2e8f9f7 116
<> 144:ef7eb2e8f9f7 117 DUALTIMER_IntConfig(TIMER_0, ENABLE);
<> 144:ef7eb2e8f9f7 118
<> 144:ef7eb2e8f9f7 119 NVIC_EnableIRQ(TIMER_IRQn);
<> 144:ef7eb2e8f9f7 120
<> 144:ef7eb2e8f9f7 121 DUALTIMER_Start(TIMER_0);
<> 144:ef7eb2e8f9f7 122
<> 144:ef7eb2e8f9f7 123
<> 144:ef7eb2e8f9f7 124 }
<> 144:ef7eb2e8f9f7 125
<> 144:ef7eb2e8f9f7 126 void us_ticker_disable_interrupt(void)
<> 144:ef7eb2e8f9f7 127 {
<> 144:ef7eb2e8f9f7 128 NVIC_DisableIRQ(TIMER_IRQn);
<> 144:ef7eb2e8f9f7 129
<> 144:ef7eb2e8f9f7 130 DUALTIMER_IntConfig(TIMER_0, DISABLE);
<> 144:ef7eb2e8f9f7 131 }
<> 144:ef7eb2e8f9f7 132
<> 144:ef7eb2e8f9f7 133 void us_ticker_clear_interrupt(void)
<> 144:ef7eb2e8f9f7 134 {
<> 144:ef7eb2e8f9f7 135 DUALTIMER_IntClear(TIMER_0);
<> 144:ef7eb2e8f9f7 136 }