MacroRat / MouseCode

Mouse code for the MacroRat

Dependencies:   ITG3200 QEI

mbed-dev/targets/TARGET_ARM_SSG/TARGET_BEETLE/device/apb_timer.c@18:6a4db94011d3, 2017-05-14 (annotated)

Committer:
sahilmgandhi
Date:
Sun May 14 23:18:57 2017 +0000
Revision:
18:6a4db94011d3
Publishing again

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1 /* mbed Microcontroller Library
sahilmgandhi 18:6a4db94011d3 2 * Copyright (c) 2016 ARM Limited
sahilmgandhi 18:6a4db94011d3 3 *
sahilmgandhi 18:6a4db94011d3 4 * Licensed under the Apache License, Version 2.0 (the "License");
sahilmgandhi 18:6a4db94011d3 5 * you may not use this file except in compliance with the License.
sahilmgandhi 18:6a4db94011d3 6 * You may obtain a copy of the License at
sahilmgandhi 18:6a4db94011d3 7 *
sahilmgandhi 18:6a4db94011d3 8 * http://www.apache.org/licenses/LICENSE-2.0
sahilmgandhi 18:6a4db94011d3 9 *
sahilmgandhi 18:6a4db94011d3 10 * Unless required by applicable law or agreed to in writing, software
sahilmgandhi 18:6a4db94011d3 11 * distributed under the License is distributed on an "AS IS" BASIS,
sahilmgandhi 18:6a4db94011d3 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sahilmgandhi 18:6a4db94011d3 13 * See the License for the specific language governing permissions and
sahilmgandhi 18:6a4db94011d3 14 * limitations under the License.
sahilmgandhi 18:6a4db94011d3 15 */
sahilmgandhi 18:6a4db94011d3 16 #include "cmsis.h"
sahilmgandhi 18:6a4db94011d3 17 #include "apb_timer.h"
sahilmgandhi 18:6a4db94011d3 18
sahilmgandhi 18:6a4db94011d3 19 /* Timer Private Data */
sahilmgandhi 18:6a4db94011d3 20 typedef struct {
sahilmgandhi 18:6a4db94011d3 21 /* Timer Definition */
sahilmgandhi 18:6a4db94011d3 22 CMSDK_TIMER_TypeDef *timerN;
sahilmgandhi 18:6a4db94011d3 23 /* Timer IRQn */
sahilmgandhi 18:6a4db94011d3 24 uint32_t timerIRQn;
sahilmgandhi 18:6a4db94011d3 25 /* Timer Reload Value */
sahilmgandhi 18:6a4db94011d3 26 uint32_t timerReload;
sahilmgandhi 18:6a4db94011d3 27 /* Timer state */
sahilmgandhi 18:6a4db94011d3 28 uint32_t state;
sahilmgandhi 18:6a4db94011d3 29 } apb_timer_t;
sahilmgandhi 18:6a4db94011d3 30
sahilmgandhi 18:6a4db94011d3 31 /* Timer state definitions */
sahilmgandhi 18:6a4db94011d3 32 #define TIMER_INITIALIZED (1)
sahilmgandhi 18:6a4db94011d3 33 #define TIMER_ENABLED (1 << 1)
sahilmgandhi 18:6a4db94011d3 34
sahilmgandhi 18:6a4db94011d3 35 /*
sahilmgandhi 18:6a4db94011d3 36 * This Timer is written for MBED OS and keeps count
sahilmgandhi 18:6a4db94011d3 37 * of the ticks. All the elaboration logic is demanded
sahilmgandhi 18:6a4db94011d3 38 * to the upper layers.
sahilmgandhi 18:6a4db94011d3 39 */
sahilmgandhi 18:6a4db94011d3 40 #define TIMER_MAX_VALUE 0xFFFFFFFF
sahilmgandhi 18:6a4db94011d3 41 #define TIMER_TICKS_US (SystemCoreClock/1000000)
sahilmgandhi 18:6a4db94011d3 42
sahilmgandhi 18:6a4db94011d3 43 /* Timers Array */
sahilmgandhi 18:6a4db94011d3 44 static apb_timer_t Timers[NUM_TIMERS];
sahilmgandhi 18:6a4db94011d3 45
sahilmgandhi 18:6a4db94011d3 46 void Timer_Index_Init(uint32_t timer, uint32_t reload,
sahilmgandhi 18:6a4db94011d3 47 CMSDK_TIMER_TypeDef *TimerN, uint32_t IRQn)
sahilmgandhi 18:6a4db94011d3 48 {
sahilmgandhi 18:6a4db94011d3 49 Timers[timer].timerN = TimerN;
sahilmgandhi 18:6a4db94011d3 50 Timers[timer].timerIRQn = IRQn;
sahilmgandhi 18:6a4db94011d3 51 Timers[timer].timerReload = reload;
sahilmgandhi 18:6a4db94011d3 52 Timers[timer].state = TIMER_INITIALIZED;
sahilmgandhi 18:6a4db94011d3 53 }
sahilmgandhi 18:6a4db94011d3 54
sahilmgandhi 18:6a4db94011d3 55 /*
sahilmgandhi 18:6a4db94011d3 56 * Timer_Initialize(): Initializes an hardware timer
sahilmgandhi 18:6a4db94011d3 57 * timer: timer to be Initialized
sahilmgandhi 18:6a4db94011d3 58 * time_us: timer reload value in us - 0 to reload to timer max value
sahilmgandhi 18:6a4db94011d3 59 * time_us = tick_value / TIMER_TICKS_US
sahilmgandhi 18:6a4db94011d3 60 */
sahilmgandhi 18:6a4db94011d3 61 #define TIMER_INIT(index, reload) Timer_Index_Init(index, reload, CMSDK_TIMER##index, TIMER##index##_IRQn)
sahilmgandhi 18:6a4db94011d3 62 void Timer_Initialize(uint32_t timer, uint32_t time_us)
sahilmgandhi 18:6a4db94011d3 63 {
sahilmgandhi 18:6a4db94011d3 64 uint32_t reload = 0;
sahilmgandhi 18:6a4db94011d3 65
sahilmgandhi 18:6a4db94011d3 66 if (timer < NUM_TIMERS)
sahilmgandhi 18:6a4db94011d3 67 {
sahilmgandhi 18:6a4db94011d3 68 if (time_us == 0)
sahilmgandhi 18:6a4db94011d3 69 reload = TIMER_MAX_VALUE;
sahilmgandhi 18:6a4db94011d3 70 else
sahilmgandhi 18:6a4db94011d3 71 reload = (time_us) * TIMER_TICKS_US;
sahilmgandhi 18:6a4db94011d3 72
sahilmgandhi 18:6a4db94011d3 73 switch(timer) {
sahilmgandhi 18:6a4db94011d3 74 case 0: TIMER_INIT(0, reload);
sahilmgandhi 18:6a4db94011d3 75 break;
sahilmgandhi 18:6a4db94011d3 76 case 1: TIMER_INIT(1, reload);
sahilmgandhi 18:6a4db94011d3 77 break;
sahilmgandhi 18:6a4db94011d3 78 default: break;
sahilmgandhi 18:6a4db94011d3 79 }
sahilmgandhi 18:6a4db94011d3 80 }
sahilmgandhi 18:6a4db94011d3 81 }
sahilmgandhi 18:6a4db94011d3 82
sahilmgandhi 18:6a4db94011d3 83 /*
sahilmgandhi 18:6a4db94011d3 84 * Timer_Enable(): Enables a hardware timer
sahilmgandhi 18:6a4db94011d3 85 * timer: timer to be enabled
sahilmgandhi 18:6a4db94011d3 86 */
sahilmgandhi 18:6a4db94011d3 87 void Timer_Enable(uint32_t timer)
sahilmgandhi 18:6a4db94011d3 88 {
sahilmgandhi 18:6a4db94011d3 89 /* The timer has to be contained in a valid range */
sahilmgandhi 18:6a4db94011d3 90 if (timer < NUM_TIMERS) {
sahilmgandhi 18:6a4db94011d3 91 /* Timer has to be already initialized */
sahilmgandhi 18:6a4db94011d3 92 if (Timers[timer].state == TIMER_INITIALIZED) {
sahilmgandhi 18:6a4db94011d3 93 /* Disable Timer */
sahilmgandhi 18:6a4db94011d3 94 (Timers[timer].timerN)->CTRL = 0x0;
sahilmgandhi 18:6a4db94011d3 95 /* Reload Value */
sahilmgandhi 18:6a4db94011d3 96 (Timers[timer].timerN)->RELOAD = Timers[timer].timerReload;
sahilmgandhi 18:6a4db94011d3 97 /* Enable Interrupt */
sahilmgandhi 18:6a4db94011d3 98 (Timers[timer].timerN)->CTRL = CMSDK_TIMER_CTRL_IRQEN_Msk;
sahilmgandhi 18:6a4db94011d3 99 /* Enable Counter */
sahilmgandhi 18:6a4db94011d3 100 (Timers[timer].timerN)->CTRL |= CMSDK_TIMER_CTRL_EN_Msk;
sahilmgandhi 18:6a4db94011d3 101 /* Change timer state */
sahilmgandhi 18:6a4db94011d3 102 Timers[timer].state |= TIMER_ENABLED;
sahilmgandhi 18:6a4db94011d3 103 }
sahilmgandhi 18:6a4db94011d3 104 }
sahilmgandhi 18:6a4db94011d3 105 }
sahilmgandhi 18:6a4db94011d3 106
sahilmgandhi 18:6a4db94011d3 107 /*
sahilmgandhi 18:6a4db94011d3 108 * Timer_Disable(): Disables a hardware timer
sahilmgandhi 18:6a4db94011d3 109 * timer: timer to be disabled
sahilmgandhi 18:6a4db94011d3 110 */
sahilmgandhi 18:6a4db94011d3 111 void Timer_Disable(uint32_t timer)
sahilmgandhi 18:6a4db94011d3 112 {
sahilmgandhi 18:6a4db94011d3 113 /* The timer has to be contained in a valid range */
sahilmgandhi 18:6a4db94011d3 114 if (timer < NUM_TIMERS) {
sahilmgandhi 18:6a4db94011d3 115 /* Timer has to be already initialized and enabled */
sahilmgandhi 18:6a4db94011d3 116 if (Timers[timer].state == (TIMER_INITIALIZED | TIMER_ENABLED)) {
sahilmgandhi 18:6a4db94011d3 117 /* Disable Timer */
sahilmgandhi 18:6a4db94011d3 118 (Timers[timer].timerN)->CTRL = 0x0;
sahilmgandhi 18:6a4db94011d3 119 /* Change timer state */
sahilmgandhi 18:6a4db94011d3 120 Timers[timer].state = TIMER_INITIALIZED;
sahilmgandhi 18:6a4db94011d3 121 }
sahilmgandhi 18:6a4db94011d3 122 }
sahilmgandhi 18:6a4db94011d3 123 }
sahilmgandhi 18:6a4db94011d3 124
sahilmgandhi 18:6a4db94011d3 125 /*
sahilmgandhi 18:6a4db94011d3 126 * Timer_isEnabled(): verifies if a timer is enabled
sahilmgandhi 18:6a4db94011d3 127 * timer: timer to be verified
sahilmgandhi 18:6a4db94011d3 128 * @return: 0 disabled - 1 enabled
sahilmgandhi 18:6a4db94011d3 129 */
sahilmgandhi 18:6a4db94011d3 130 uint32_t Timer_isEnabled(uint32_t timer)
sahilmgandhi 18:6a4db94011d3 131 {
sahilmgandhi 18:6a4db94011d3 132 /* The timer has to be contained in a valid range */
sahilmgandhi 18:6a4db94011d3 133 if (timer < NUM_TIMERS) {
sahilmgandhi 18:6a4db94011d3 134 /* Timer has to be already initialized and enabled */
sahilmgandhi 18:6a4db94011d3 135 if (Timers[timer].state == (TIMER_INITIALIZED | TIMER_ENABLED))
sahilmgandhi 18:6a4db94011d3 136 return 1;
sahilmgandhi 18:6a4db94011d3 137 } else {
sahilmgandhi 18:6a4db94011d3 138 return 0;
sahilmgandhi 18:6a4db94011d3 139 }
sahilmgandhi 18:6a4db94011d3 140 return 0;
sahilmgandhi 18:6a4db94011d3 141 }
sahilmgandhi 18:6a4db94011d3 142
sahilmgandhi 18:6a4db94011d3 143 /*
sahilmgandhi 18:6a4db94011d3 144 * Timer_Read(): provides timer VALUE
sahilmgandhi 18:6a4db94011d3 145 * timer: timer to be read
sahilmgandhi 18:6a4db94011d3 146 * @return: timer VALUE us
sahilmgandhi 18:6a4db94011d3 147 */
sahilmgandhi 18:6a4db94011d3 148 uint32_t Timer_Read(uint32_t timer)
sahilmgandhi 18:6a4db94011d3 149 {
sahilmgandhi 18:6a4db94011d3 150 uint32_t return_value = 0;
sahilmgandhi 18:6a4db94011d3 151 /* Verify if the Timer is enabled */
sahilmgandhi 18:6a4db94011d3 152 if (Timer_isEnabled(timer) == 1) {
sahilmgandhi 18:6a4db94011d3 153 return_value = (Timers[timer].timerReload
sahilmgandhi 18:6a4db94011d3 154 - (Timers[timer].timerN)->VALUE)
sahilmgandhi 18:6a4db94011d3 155 / TIMER_TICKS_US;
sahilmgandhi 18:6a4db94011d3 156 }
sahilmgandhi 18:6a4db94011d3 157
sahilmgandhi 18:6a4db94011d3 158 return return_value;
sahilmgandhi 18:6a4db94011d3 159 }
sahilmgandhi 18:6a4db94011d3 160
sahilmgandhi 18:6a4db94011d3 161 /*
sahilmgandhi 18:6a4db94011d3 162 * Timer_SetInterrupt(): sets timer Interrupt
sahilmgandhi 18:6a4db94011d3 163 * timer: timer on which interrupt is set
sahilmgandhi 18:6a4db94011d3 164 * time_us: reloading time in us
sahilmgandhi 18:6a4db94011d3 165 */
sahilmgandhi 18:6a4db94011d3 166 void Timer_SetInterrupt(uint32_t timer, uint32_t time_us)
sahilmgandhi 18:6a4db94011d3 167 {
sahilmgandhi 18:6a4db94011d3 168 uint32_t load_time_us = 0;
sahilmgandhi 18:6a4db94011d3 169 /* Verify if the Timer is enabled */
sahilmgandhi 18:6a4db94011d3 170 if (Timer_isEnabled(timer) == 1) {
sahilmgandhi 18:6a4db94011d3 171 /* Disable Timer */
sahilmgandhi 18:6a4db94011d3 172 Timer_Disable(timer);
sahilmgandhi 18:6a4db94011d3 173 /* Enable Interrupt */
sahilmgandhi 18:6a4db94011d3 174 (Timers[timer].timerN)->CTRL = CMSDK_TIMER_CTRL_IRQEN_Msk;
sahilmgandhi 18:6a4db94011d3 175
sahilmgandhi 18:6a4db94011d3 176 /* Check time us condition */
sahilmgandhi 18:6a4db94011d3 177 if(time_us == TIMER_DEFAULT_RELOAD)
sahilmgandhi 18:6a4db94011d3 178 load_time_us = TIMER_MAX_VALUE;
sahilmgandhi 18:6a4db94011d3 179 else
sahilmgandhi 18:6a4db94011d3 180 load_time_us = time_us * TIMER_TICKS_US;
sahilmgandhi 18:6a4db94011d3 181
sahilmgandhi 18:6a4db94011d3 182 /* Initialize Timer Value */
sahilmgandhi 18:6a4db94011d3 183 Timers[timer].timerReload = load_time_us;
sahilmgandhi 18:6a4db94011d3 184 (Timers[timer].timerN)->RELOAD = Timers[timer].timerReload;
sahilmgandhi 18:6a4db94011d3 185 (Timers[timer].timerN)->VALUE = Timers[timer].timerReload;
sahilmgandhi 18:6a4db94011d3 186 /* Enable Counter */
sahilmgandhi 18:6a4db94011d3 187 (Timers[timer].timerN)->CTRL |= CMSDK_TIMER_CTRL_EN_Msk;
sahilmgandhi 18:6a4db94011d3 188 /* Change timer state */
sahilmgandhi 18:6a4db94011d3 189 Timers[timer].state |= TIMER_ENABLED;
sahilmgandhi 18:6a4db94011d3 190 }
sahilmgandhi 18:6a4db94011d3 191 }
sahilmgandhi 18:6a4db94011d3 192
sahilmgandhi 18:6a4db94011d3 193 /*
sahilmgandhi 18:6a4db94011d3 194 * Timer_DisableInterrupt(): disables timer interrupt
sahilmgandhi 18:6a4db94011d3 195 * timer: timer on which interrupt is disabled
sahilmgandhi 18:6a4db94011d3 196 */
sahilmgandhi 18:6a4db94011d3 197 void Timer_DisableInterrupt(uint32_t timer)
sahilmgandhi 18:6a4db94011d3 198 {
sahilmgandhi 18:6a4db94011d3 199 /* Verify if the Timer is enabled */
sahilmgandhi 18:6a4db94011d3 200 if (Timer_isEnabled(timer) == 1) {
sahilmgandhi 18:6a4db94011d3 201 /* Disable Interrupt */
sahilmgandhi 18:6a4db94011d3 202 (Timers[timer].timerN)->CTRL &= CMSDK_TIMER_CTRL_EN_Msk;
sahilmgandhi 18:6a4db94011d3 203 }
sahilmgandhi 18:6a4db94011d3 204 }
sahilmgandhi 18:6a4db94011d3 205
sahilmgandhi 18:6a4db94011d3 206 /*
sahilmgandhi 18:6a4db94011d3 207 * Timer_ClearInterrupt(): clear timer interrupt
sahilmgandhi 18:6a4db94011d3 208 * timer: timer on which interrupt needs to be cleared
sahilmgandhi 18:6a4db94011d3 209 */
sahilmgandhi 18:6a4db94011d3 210 void Timer_ClearInterrupt(uint32_t timer)
sahilmgandhi 18:6a4db94011d3 211 {
sahilmgandhi 18:6a4db94011d3 212 /* Verify if the Timer is enabled */
sahilmgandhi 18:6a4db94011d3 213 if (Timer_isEnabled(timer) == 1) {
sahilmgandhi 18:6a4db94011d3 214 /* Clear Interrupt */
sahilmgandhi 18:6a4db94011d3 215 (Timers[timer].timerN)->INTCLEAR = CMSDK_TIMER_INTCLEAR_Msk;
sahilmgandhi 18:6a4db94011d3 216 }
sahilmgandhi 18:6a4db94011d3 217 }
sahilmgandhi 18:6a4db94011d3 218
sahilmgandhi 18:6a4db94011d3 219 /*
sahilmgandhi 18:6a4db94011d3 220 * Timer_GetIRQn(): returns IRQn of a Timer
sahilmgandhi 18:6a4db94011d3 221 * timer: timer on which IRQn is defined - 0 if it is not defined
sahilmgandhi 18:6a4db94011d3 222 */
sahilmgandhi 18:6a4db94011d3 223 uint32_t Timer_GetIRQn(uint32_t timer)
sahilmgandhi 18:6a4db94011d3 224 {
sahilmgandhi 18:6a4db94011d3 225 /* Verify if the Timer is enabled */
sahilmgandhi 18:6a4db94011d3 226 if (Timer_isEnabled(timer) == 1) {
sahilmgandhi 18:6a4db94011d3 227 return Timers[timer].timerIRQn;
sahilmgandhi 18:6a4db94011d3 228 }
sahilmgandhi 18:6a4db94011d3 229 return 0;
sahilmgandhi 18:6a4db94011d3 230 }
sahilmgandhi 18:6a4db94011d3 231
sahilmgandhi 18:6a4db94011d3 232 /*
sahilmgandhi 18:6a4db94011d3 233 * Timer_GetTicksUS(): returns the number of Ticks per us
sahilmgandhi 18:6a4db94011d3 234 * timer: timer associated with the Ticks per us
sahilmgandhi 18:6a4db94011d3 235 * @return: Ticks per us - 0 if the timer is disables
sahilmgandhi 18:6a4db94011d3 236 */
sahilmgandhi 18:6a4db94011d3 237 uint32_t Timer_GetTicksUS(uint32_t timer)
sahilmgandhi 18:6a4db94011d3 238 {
sahilmgandhi 18:6a4db94011d3 239 /* Verify if the Timer is enabled */
sahilmgandhi 18:6a4db94011d3 240 if (Timer_isEnabled(timer) == 1) {
sahilmgandhi 18:6a4db94011d3 241 return TIMER_TICKS_US;
sahilmgandhi 18:6a4db94011d3 242 }
sahilmgandhi 18:6a4db94011d3 243 return 0;
sahilmgandhi 18:6a4db94011d3 244 }
sahilmgandhi 18:6a4db94011d3 245
sahilmgandhi 18:6a4db94011d3 246 /*
sahilmgandhi 18:6a4db94011d3 247 * Timer_GetReloadValue(): returns the load value of the selected
sahilmgandhi 18:6a4db94011d3 248 * timer.
sahilmgandhi 18:6a4db94011d3 249 * timer: timer associated with the Ticks per us
sahilmgandhi 18:6a4db94011d3 250 * @return: reload value of the selected singletimer
sahilmgandhi 18:6a4db94011d3 251 */
sahilmgandhi 18:6a4db94011d3 252 uint32_t Timer_GetReloadValue(uint32_t timer)
sahilmgandhi 18:6a4db94011d3 253 {
sahilmgandhi 18:6a4db94011d3 254 /* Verify if the Timer is enabled */
sahilmgandhi 18:6a4db94011d3 255 if (Timer_isEnabled(timer) == 1) {
sahilmgandhi 18:6a4db94011d3 256 if (timer == TIMER1)
sahilmgandhi 18:6a4db94011d3 257 return Timers[timer].timerReload / TIMER_TICKS_US;
sahilmgandhi 18:6a4db94011d3 258 else
sahilmgandhi 18:6a4db94011d3 259 return Timers[timer].timerReload / TIMER_TICKS_US;
sahilmgandhi 18:6a4db94011d3 260 }
sahilmgandhi 18:6a4db94011d3 261 return 0;
sahilmgandhi 18:6a4db94011d3 262 }