Mouse code for the MacroRat
mbed-dev/targets/TARGET_ARM_SSG/TARGET_BEETLE/device/apb_dualtimer.c
- Committer:
- sahilmgandhi
- Date:
- 2017-05-14
- Revision:
- 18:6a4db94011d3
File content as of revision 18:6a4db94011d3:
/* mbed Microcontroller Library * Copyright (c) 2016 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "cmsis.h" #include "apb_dualtimer.h" /* DualTimer Private Data */ typedef struct { /* DualTimer 1 Definition */ CMSDK_DUALTIMER_SINGLE_TypeDef *dualtimer1; /* DualTimer 2 Definition */ CMSDK_DUALTIMER_SINGLE_TypeDef *dualtimer2; /* Dual Timer IRQn */ uint32_t dualtimerIRQn; /* DualTimer 1 Reload Value */ uint32_t dualtimer1Reload; /* DualTimer 2 Reload Value */ uint32_t dualtimer2Reload; /* Timer state */ uint32_t state; } apb_dualtimer_t; /* Timer state definitions */ #define DUALTIMER_INITIALIZED (1) #define DUALTIMER_ENABLED (1 << 1) /* * This Timer is written for MBED OS and keeps count * of the ticks. All the elaboration logic is demanded * to the upper layers. */ #define DUALTIMER_MAX_VALUE 0xFFFFFFFF #define DUALTIMER_TICKS_US (SystemCoreClock/1000000) /* Dual Timers Array */ static apb_dualtimer_t DualTimers[NUM_DUALTIMERS]; /* * DualTimer_Initialize(): Initializes a hardware timer * timer: timer to be Initialized * time_us: timer reload value in us - 0 to reload to timer max value * time_us = ticks_value / TIMER_TICK_US */ void DualTimer_Initialize(uint32_t timer, uint32_t time_us) { uint32_t reload = 0; if (timer < NUM_DUALTIMERS) { if (time_us == 0) reload = DUALTIMER_MAX_VALUE; else reload = (time_us) * DUALTIMER_TICKS_US; switch(timer) { case 0: DualTimers[timer].dualtimer1 = CMSDK_DUALTIMER1; DualTimers[timer].dualtimer2 = CMSDK_DUALTIMER2; DualTimers[timer].dualtimerIRQn = DUALTIMER_IRQn; DualTimers[timer].dualtimer1Reload = reload; DualTimers[timer].dualtimer2Reload = reload; DualTimers[timer].state = DUALTIMER_INITIALIZED; default: break; } } } /* * DualTimer_ReturnMode(): returns the correct mode for Dual Timer Control * mode: mode set by user * @return: mode for TimeControl register */ uint32_t DualTimer_ReturnMode(timerenable_t mode) { uint32_t return_mode = 0; /* Check Interrupt Enable */ if (((mode & DUALTIMER_INT) >> DUALTIMER_INT_MASK) == 1) return_mode |= CMSDK_DUALTIMER_CTRL_INTEN_Msk; /* Check 32 bit Counter */ if (((mode & DUALTIMER_COUNT_32) >> DUALTIMER_COUNT_32_MASK) == 1) return_mode |= CMSDK_DUALTIMER_CTRL_SIZE_Msk; /* Check Periodic Mode */ if (((mode & DUALTIMER_PERIODIC) >> DUALTIMER_PERIODIC_MASK) == 1) return_mode |= CMSDK_DUALTIMER_CTRL_MODE_Msk; /* Check OneShot Mode */ if (((mode & DUALTIMER_ONESHOT) >> DUALTIMER_ONESHOT_MASK) == 1) return_mode |= CMSDK_DUALTIMER_CTRL_ONESHOOT_Msk; return return_mode; } /* * DualTimer_Enable(): Enables a hardware timer * timer: timer to be enabled * mode: enable mode */ void DualTimer_Enable(uint32_t timer, timerenable_t mode) { uint32_t dualtimerControl = 0; /* The timer has to be contained in a valid range */ if (timer < NUM_DUALTIMERS) { /* Timer has to be already initialized */ if (DualTimers[timer].state == DUALTIMER_INITIALIZED) { /* Disable Timer */ (DualTimers[timer].dualtimer1)->TimerControl = 0x0; (DualTimers[timer].dualtimer2)->TimerControl = 0x0; /* Reload Value */ (DualTimers[timer].dualtimer1)->TimerLoad = DualTimers[timer].dualtimer1Reload; (DualTimers[timer].dualtimer2)->TimerLoad = DualTimers[timer].dualtimer2Reload; /* Set up Dual Timer Control */ dualtimerControl = DualTimer_ReturnMode(mode); (DualTimers[timer].dualtimer1)->TimerControl = dualtimerControl; (DualTimers[timer].dualtimer2)->TimerControl = dualtimerControl; /* Enable Counter */ (DualTimers[timer].dualtimer1)->TimerControl |= CMSDK_DUALTIMER_CTRL_EN_Msk; (DualTimers[timer].dualtimer2)->TimerControl |= CMSDK_DUALTIMER_CTRL_EN_Msk; /* Change timer state */ DualTimers[timer].state |= DUALTIMER_ENABLED; } } } /* * DualTimer_Disable(): Disables a hardware timer * timer: timer to be disabled * dis_timer: 0 both - 1 dual timer 1 - 2 dual timer 2 */ void DualTimer_Disable(uint32_t timer, uint32_t dis_timer) { /* The timer has to be contained in a valid range */ if (timer < NUM_DUALTIMERS) { /* Timer has to be already initialized and enabled */ if (DualTimers[timer].state == (DUALTIMER_INITIALIZED | DUALTIMER_ENABLED)) { /* Disable Timer */ switch (dis_timer) { case 0: (DualTimers[timer].dualtimer1)->TimerControl = 0x0; (DualTimers[timer].dualtimer2)->TimerControl = 0x0; break; case 1: (DualTimers[timer].dualtimer1)->TimerControl = 0x0; break; case 2: (DualTimers[timer].dualtimer2)->TimerControl = 0x0; break; default: break; } /* Change timer state */ DualTimers[timer].state = DUALTIMER_INITIALIZED; } } } /* * DualTimer_isEnabled(): verifies if a timer is enabled * timer: timer to be verified * @return: 0 disabled - 1 enabled */ uint32_t DualTimer_isEnabled(uint32_t timer) { /* The timer has to be contained in a valid range */ if (timer < NUM_DUALTIMERS) { /* Timer has to be already initialized and enabled */ if (DualTimers[timer].state == (DUALTIMER_INITIALIZED | DUALTIMER_ENABLED)) return 1; } else { return 0; } return 0; } /* * DualTimer_Read_1(): provides single timer 1 VALUE * timer: timer to be read * @return: timer VALUE */ uint32_t DualTimer_Read_1(uint32_t timer) { uint32_t return_value = 0; /* Verify if the Timer is enabled */ if (DualTimer_isEnabled(timer) == 1) { return_value = (DualTimers[timer].dualtimer1Reload - (DualTimers[timer].dualtimer1)->TimerValue) / DUALTIMER_TICKS_US; } return return_value; } /* * DualTimer_Read_2(): provides single timer 2 VALUE * timer: timer to be read * @return: timer VALUE */ uint32_t DualTimer_Read_2(uint32_t timer) { uint32_t return_value = 0; /* Verify if the Timer is enabled */ if (DualTimer_isEnabled(timer) == 1) { return_value = (DualTimers[timer].dualtimer2Reload - (DualTimers[timer].dualtimer2)->TimerValue) / DUALTIMER_TICKS_US; } return return_value; } /* * DualTimer_SetInterrupt_1(): sets timer 1 Interrupt * timer: timer on which interrupt is set * time_us: reloading value us * mode: enable mode */ void DualTimer_SetInterrupt_1(uint32_t timer, uint32_t time_us, timerenable_t mode) { uint32_t dualtimerControl = 0; uint32_t load_time_us = 0; /* Verify if the Timer is enabled */ if (DualTimer_isEnabled(timer) == 1) { /* Disable Timer */ DualTimer_Disable(timer, SINGLETIMER1); /* Set up Dual Timer Control */ dualtimerControl = DualTimer_ReturnMode(mode); (DualTimers[timer].dualtimer1)->TimerControl = CMSDK_DUALTIMER_CTRL_INTEN_Msk | dualtimerControl; /* Check time us condition */ if(time_us == DUALTIMER_DEFAULT_RELOAD) load_time_us = DUALTIMER_MAX_VALUE; else load_time_us = time_us * DUALTIMER_TICKS_US; /* Reload Value */ DualTimers[timer].dualtimer1Reload = load_time_us; (DualTimers[timer].dualtimer1)->TimerLoad = DualTimers[timer].dualtimer1Reload; /* Enable Counter */ (DualTimers[timer].dualtimer1)->TimerControl |= CMSDK_DUALTIMER_CTRL_EN_Msk; /* Change timer state */ DualTimers[timer].state |= DUALTIMER_ENABLED; } } /* * DualTimer_SetInterrupt_2(): sets timer 2 Interrupt * timer: timer on which interrupt is set * time_us: reloading value us * mode: enable mode */ void DualTimer_SetInterrupt_2(uint32_t timer, uint32_t time_us, timerenable_t mode) { uint32_t dualtimerControl = 0; uint32_t load_time_us = 0; /* Verify if the Timer is enabled */ if (DualTimer_isEnabled(timer) == 1) { /* Disable Timer */ DualTimer_Disable(timer, SINGLETIMER2); /* Set up Dual Timer Control */ dualtimerControl = DualTimer_ReturnMode(mode); (DualTimers[timer].dualtimer2)->TimerControl = CMSDK_DUALTIMER_CTRL_INTEN_Msk | dualtimerControl; /* Check time us condition */ if(time_us == DUALTIMER_DEFAULT_RELOAD) load_time_us = DUALTIMER_MAX_VALUE; else load_time_us = time_us * DUALTIMER_TICKS_US; /* Reload Value */ DualTimers[timer].dualtimer2Reload = load_time_us; (DualTimers[timer].dualtimer2)->TimerLoad = DualTimers[timer].dualtimer2Reload; /* Enable Counter */ (DualTimers[timer].dualtimer2)->TimerControl |= CMSDK_DUALTIMER_CTRL_EN_Msk; /* Change timer state */ DualTimers[timer].state |= DUALTIMER_ENABLED; } } /* * DualTimer_DisableInterrupt(): disables timer interrupts * dualimer: dualtimer on which interrupt is disabled * single_timer: single timer in the dualtimer on which * interrupt is disabled */ void DualTimer_DisableInterrupt(uint32_t dualtimer, uint32_t single_timer) { /* Verify if the Timer is enabled */ if (DualTimer_isEnabled(dualtimer) == 1) { switch(single_timer) { case SINGLETIMER1: /* Disable Interrupt for single timer 1 */ (DualTimers[dualtimer].dualtimer1)->TimerControl &= CMSDK_DUALTIMER_CTRL_EN_Msk; break; case SINGLETIMER2: /* Disable Interrupt for single timer 2 */ (DualTimers[dualtimer].dualtimer2)->TimerControl &= CMSDK_DUALTIMER_CTRL_EN_Msk; break; case ALL_SINGLETIMERS: /* Disable Interrupt for single timer 1 */ (DualTimers[dualtimer].dualtimer1)->TimerControl &= CMSDK_DUALTIMER_CTRL_EN_Msk; /* Disable Interrupt for single timer 2 */ (DualTimers[dualtimer].dualtimer2)->TimerControl &= CMSDK_DUALTIMER_CTRL_EN_Msk; break; default: break; } } } /* * DualTimer_ClearInterrupt(): clear timer interrupt * timer: timer on which interrupt needs to be cleared */ void DualTimer_ClearInterrupt(uint32_t timer) { /* Verify if the Timer is enabled */ if (DualTimer_isEnabled(timer) == 1) { /* Clear Interrupt */ (DualTimers[timer].dualtimer1)->TimerIntClr = CMSDK_DUALTIMER_INTCLR_Msk; (DualTimers[timer].dualtimer2)->TimerIntClr = CMSDK_DUALTIMER_INTCLR_Msk; } } /* * DualTimer_GetIRQn(): returns IRQn of a DualTimer * timer: timer on which IRQn is defined - 0 if it is not defined */ uint32_t DualTimer_GetIRQn(uint32_t timer) { /* Verify if the Timer is enabled */ if (DualTimer_isEnabled(timer) == 1) { return DualTimers[timer].dualtimerIRQn; } return 0; } /* * DualTimer_GetIRQInfo(): provides the single timer who caused * the interrupt. * dualtimer: dualtimer that triggered the IRQ * @return: a single timer - 0 if it is not defined */ uint32_t DualTimer_GetIRQInfo(uint32_t timer) { /* Verify if the Timer is enabled */ if (DualTimer_isEnabled(timer) == 1) { if((DualTimers[timer].dualtimer1)->TimerRIS) return SINGLETIMER1; else return SINGLETIMER2; } return 0; } /* * DualTimer_GetTicksUS(): returns the Ticks per us * timer: timer associated with the Ticks per us * @return: Ticks per us - 0 if the timer is disables */ uint32_t DualTimer_GetTicksUS(uint32_t timer) { /* Verify if the Timer is enabled */ if (DualTimer_isEnabled(timer) == 1) { return DUALTIMER_TICKS_US; } return 0; } /* * DualTimer_GetReloadValue(): returns the load value of the selected * singletimer. * timer: timer associated with the Ticks per us * singletimer: selected singletimer * @return: reload value of the selected singletimer - 0 if timer is disabled */ uint32_t DualTimer_GetReloadValue(uint32_t timer, uint32_t singletimer) { /* Verify if the Timer is enabled */ if (DualTimer_isEnabled(timer) == 1) { if (singletimer == SINGLETIMER1) return DualTimers[timer].dualtimer1Reload / DUALTIMER_TICKS_US; else return DualTimers[timer].dualtimer2Reload / DUALTIMER_TICKS_US; } return 0; }