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tinySA/os/hal/platforms/STM32/gpt_lld.c

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/*
ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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.
*/
/**
* @file STM32/gpt_lld.c
* @brief STM32 GPT subsystem low level driver source.
*
* @addtogroup GPT
* @{
*/
#include "ch.h"
#include "hal.h"
#if HAL_USE_GPT || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/**
* @brief GPTD1 driver identifier.
* @note The driver GPTD1 allocates the complex timer TIM1 when enabled.
*/
#if STM32_GPT_USE_TIM1 || defined(__DOXYGEN__)
GPTDriver GPTD1;
#endif
/**
* @brief GPTD2 driver identifier.
* @note The driver GPTD2 allocates the timer TIM2 when enabled.
*/
#if STM32_GPT_USE_TIM2 || defined(__DOXYGEN__)
GPTDriver GPTD2;
#endif
/**
* @brief GPTD3 driver identifier.
* @note The driver GPTD3 allocates the timer TIM3 when enabled.
*/
#if STM32_GPT_USE_TIM3 || defined(__DOXYGEN__)
GPTDriver GPTD3;
#endif
/**
* @brief GPTD4 driver identifier.
* @note The driver GPTD4 allocates the timer TIM4 when enabled.
*/
#if STM32_GPT_USE_TIM4 || defined(__DOXYGEN__)
GPTDriver GPTD4;
#endif
/**
* @brief GPTD5 driver identifier.
* @note The driver GPTD5 allocates the timer TIM5 when enabled.
*/
#if STM32_GPT_USE_TIM5 || defined(__DOXYGEN__)
GPTDriver GPTD5;
#endif
/**
* @brief GPTD6 driver identifier.
* @note The driver GPTD6 allocates the timer TIM6 when enabled.
*/
#if STM32_GPT_USE_TIM6 || defined(__DOXYGEN__)
GPTDriver GPTD6;
#endif
/**
* @brief GPTD7 driver identifier.
* @note The driver GPTD7 allocates the timer TIM7 when enabled.
*/
#if STM32_GPT_USE_TIM7 || defined(__DOXYGEN__)
GPTDriver GPTD7;
#endif
/**
* @brief GPTD8 driver identifier.
* @note The driver GPTD8 allocates the timer TIM8 when enabled.
*/
#if STM32_GPT_USE_TIM8 || defined(__DOXYGEN__)
GPTDriver GPTD8;
#endif
/**
* @brief GPTD9 driver identifier.
* @note The driver GPTD9 allocates the timer TIM9 when enabled.
*/
#if STM32_GPT_USE_TIM9 || defined(__DOXYGEN__)
GPTDriver GPTD9;
#endif
/**
* @brief GPTD11 driver identifier.
* @note The driver GPTD11 allocates the timer TIM11 when enabled.
*/
#if STM32_GPT_USE_TIM11 || defined(__DOXYGEN__)
GPTDriver GPTD11;
#endif
/**
* @brief GPTD12 driver identifier.
* @note The driver GPTD12 allocates the timer TIM12 when enabled.
*/
#if STM32_GPT_USE_TIM12 || defined(__DOXYGEN__)
GPTDriver GPTD12;
#endif
/**
* @brief GPTD14 driver identifier.
* @note The driver GPTD14 allocates the timer TIM14 when enabled.
*/
#if STM32_GPT_USE_TIM14 || defined(__DOXYGEN__)
GPTDriver GPTD14;
#endif
/*===========================================================================*/
/* Driver local variables and types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/**
* @brief Shared IRQ handler.
*
* @param[in] gptp pointer to a @p GPTDriver object
*/
static void gpt_lld_serve_interrupt(GPTDriver *gptp) {
gptp->tim->SR = 0;
if (gptp->state == GPT_ONESHOT) {
gptp->state = GPT_READY; /* Back in GPT_READY state. */
gpt_lld_stop_timer(gptp); /* Timer automatically stopped. */
}
gptp->config->callback(gptp);
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
#if STM32_GPT_USE_TIM1
#if !defined(STM32_TIM1_UP_HANDLER)
#error "STM32_TIM1_UP_HANDLER not defined"
#endif
/**
* @brief TIM2 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(STM32_TIM1_UP_HANDLER) {
CH_IRQ_PROLOGUE();
gpt_lld_serve_interrupt(&GPTD1);
CH_IRQ_EPILOGUE();
}
#endif /* STM32_GPT_USE_TIM1 */
#if STM32_GPT_USE_TIM2
#if !defined(STM32_TIM2_HANDLER)
#error "STM32_TIM2_HANDLER not defined"
#endif
/**
* @brief TIM2 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(STM32_TIM2_HANDLER) {
CH_IRQ_PROLOGUE();
gpt_lld_serve_interrupt(&GPTD2);
CH_IRQ_EPILOGUE();
}
#endif /* STM32_GPT_USE_TIM2 */
#if STM32_GPT_USE_TIM3
#if !defined(STM32_TIM3_HANDLER)
#error "STM32_TIM3_HANDLER not defined"
#endif
/**
* @brief TIM3 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(STM32_TIM3_HANDLER) {
CH_IRQ_PROLOGUE();
gpt_lld_serve_interrupt(&GPTD3);
CH_IRQ_EPILOGUE();
}
#endif /* STM32_GPT_USE_TIM3 */
#if STM32_GPT_USE_TIM4
#if !defined(STM32_TIM4_HANDLER)
#error "STM32_TIM4_HANDLER not defined"
#endif
/**
* @brief TIM4 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(STM32_TIM4_HANDLER) {
CH_IRQ_PROLOGUE();
gpt_lld_serve_interrupt(&GPTD4);
CH_IRQ_EPILOGUE();
}
#endif /* STM32_GPT_USE_TIM4 */
#if STM32_GPT_USE_TIM5
#if !defined(STM32_TIM5_HANDLER)
#error "STM32_TIM5_HANDLER not defined"
#endif
/**
* @brief TIM5 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(STM32_TIM5_HANDLER) {
CH_IRQ_PROLOGUE();
gpt_lld_serve_interrupt(&GPTD5);
CH_IRQ_EPILOGUE();
}
#endif /* STM32_GPT_USE_TIM5 */
#if STM32_GPT_USE_TIM6
#if !defined(STM32_TIM6_HANDLER)
#error "STM32_TIM6_HANDLER not defined"
#endif
/**
* @brief TIM6 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(STM32_TIM6_HANDLER) {
CH_IRQ_PROLOGUE();
gpt_lld_serve_interrupt(&GPTD6);
CH_IRQ_EPILOGUE();
}
#endif /* STM32_GPT_USE_TIM6 */
#if STM32_GPT_USE_TIM7
#if !defined(STM32_TIM7_HANDLER)
#error "STM32_TIM7_HANDLER not defined"
#endif
/**
* @brief TIM7 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(STM32_TIM7_HANDLER) {
CH_IRQ_PROLOGUE();
gpt_lld_serve_interrupt(&GPTD7);
CH_IRQ_EPILOGUE();
}
#endif /* STM32_GPT_USE_TIM7 */
#if STM32_GPT_USE_TIM8
#if !defined(STM32_TIM8_UP_HANDLER)
#error "STM32_TIM8_UP_HANDLER not defined"
#endif
/**
* @brief TIM8 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(STM32_TIM8_UP_HANDLER) {
CH_IRQ_PROLOGUE();
gpt_lld_serve_interrupt(&GPTD8);
CH_IRQ_EPILOGUE();
}
#endif /* STM32_GPT_USE_TIM8 */
#if STM32_GPT_USE_TIM9
#if !defined(STM32_TIM9_HANDLER)
#error "STM32_TIM9_HANDLER not defined"
#endif
/**
* @brief TIM9 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(STM32_TIM9_HANDLER) {
CH_IRQ_PROLOGUE();
gpt_lld_serve_interrupt(&GPTD9);
CH_IRQ_EPILOGUE();
}
#endif /* STM32_GPT_USE_TIM9 */
#if STM32_GPT_USE_TIM11
#if !defined(STM32_TIM11_HANDLER)
#error "STM32_TIM11_HANDLER not defined"
#endif
/**
* @brief TIM11 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(STM32_TIM11_HANDLER) {
CH_IRQ_PROLOGUE();
gpt_lld_serve_interrupt(&GPTD11);
CH_IRQ_EPILOGUE();
}
#endif /* STM32_GPT_USE_TIM11 */
#if STM32_GPT_USE_TIM12
#if !defined(STM32_TIM12_HANDLER)
#error "STM32_TIM12_HANDLER not defined"
#endif
/**
* @brief TIM12 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(STM32_TIM12_HANDLER) {
CH_IRQ_PROLOGUE();
gpt_lld_serve_interrupt(&GPTD12);
CH_IRQ_EPILOGUE();
}
#endif /* STM32_GPT_USE_TIM12 */
#if STM32_GPT_USE_TIM14
#if !defined(STM32_TIM14_HANDLER)
#error "STM32_TIM14_HANDLER not defined"
#endif
/**
* @brief TIM14 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(STM32_TIM14_HANDLER) {
CH_IRQ_PROLOGUE();
gpt_lld_serve_interrupt(&GPTD14);
CH_IRQ_EPILOGUE();
}
#endif /* STM32_GPT_USE_TIM14 */
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level GPT driver initialization.
*
* @notapi
*/
void gpt_lld_init(void) {
#if STM32_GPT_USE_TIM1
/* Driver initialization.*/
GPTD1.tim = STM32_TIM1;
gptObjectInit(&GPTD1);
#endif
#if STM32_GPT_USE_TIM2
/* Driver initialization.*/
GPTD2.tim = STM32_TIM2;
gptObjectInit(&GPTD2);
#endif
#if STM32_GPT_USE_TIM3
/* Driver initialization.*/
GPTD3.tim = STM32_TIM3;
gptObjectInit(&GPTD3);
#endif
#if STM32_GPT_USE_TIM4
/* Driver initialization.*/
GPTD4.tim = STM32_TIM4;
gptObjectInit(&GPTD4);
#endif
#if STM32_GPT_USE_TIM5
/* Driver initialization.*/
GPTD5.tim = STM32_TIM5;
gptObjectInit(&GPTD5);
#endif
#if STM32_GPT_USE_TIM6
/* Driver initialization.*/
GPTD6.tim = STM32_TIM6;
gptObjectInit(&GPTD6);
#endif
#if STM32_GPT_USE_TIM7
/* Driver initialization.*/
GPTD7.tim = STM32_TIM7;
gptObjectInit(&GPTD7);
#endif
#if STM32_GPT_USE_TIM8
/* Driver initialization.*/
GPTD8.tim = STM32_TIM8;
gptObjectInit(&GPTD8);
#endif
#if STM32_GPT_USE_TIM9
/* Driver initialization.*/
GPTD9.tim = STM32_TIM9;
gptObjectInit(&GPTD9);
#endif
#if STM32_GPT_USE_TIM11
/* Driver initialization.*/
GPTD11.tim = STM32_TIM11;
gptObjectInit(&GPTD11);
#endif
#if STM32_GPT_USE_TIM12
/* Driver initialization.*/
GPTD12.tim = STM32_TIM12;
gptObjectInit(&GPTD12);
#endif
#if STM32_GPT_USE_TIM14
/* Driver initialization.*/
GPTD14.tim = STM32_TIM14;
gptObjectInit(&GPTD14);
#endif
}
/**
* @brief Configures and activates the GPT peripheral.
*
* @param[in] gptp pointer to the @p GPTDriver object
*
* @notapi
*/
void gpt_lld_start(GPTDriver *gptp) {
uint16_t psc;
if (gptp->state == GPT_STOP) {
/* Clock activation.*/
#if STM32_GPT_USE_TIM1
if (&GPTD1 == gptp) {
rccEnableTIM1(FALSE);
rccResetTIM1();
nvicEnableVector(STM32_TIM1_UP_NUMBER,
CORTEX_PRIORITY_MASK(STM32_GPT_TIM1_IRQ_PRIORITY));
gptp->clock = STM32_TIMCLK2;
}
#endif
#if STM32_GPT_USE_TIM2
if (&GPTD2 == gptp) {
rccEnableTIM2(FALSE);
rccResetTIM2();
nvicEnableVector(STM32_TIM2_NUMBER,
CORTEX_PRIORITY_MASK(STM32_GPT_TIM2_IRQ_PRIORITY));
gptp->clock = STM32_TIMCLK1;
}
#endif
#if STM32_GPT_USE_TIM3
if (&GPTD3 == gptp) {
rccEnableTIM3(FALSE);
rccResetTIM3();
nvicEnableVector(STM32_TIM3_NUMBER,
CORTEX_PRIORITY_MASK(STM32_GPT_TIM3_IRQ_PRIORITY));
gptp->clock = STM32_TIMCLK1;
}
#endif
#if STM32_GPT_USE_TIM4
if (&GPTD4 == gptp) {
rccEnableTIM4(FALSE);
rccResetTIM4();
nvicEnableVector(STM32_TIM4_NUMBER,
CORTEX_PRIORITY_MASK(STM32_GPT_TIM4_IRQ_PRIORITY));
gptp->clock = STM32_TIMCLK1;
}
#endif
#if STM32_GPT_USE_TIM5
if (&GPTD5 == gptp) {
rccEnableTIM5(FALSE);
rccResetTIM5();
nvicEnableVector(STM32_TIM5_NUMBER,
CORTEX_PRIORITY_MASK(STM32_GPT_TIM5_IRQ_PRIORITY));
gptp->clock = STM32_TIMCLK1;
}
#endif
#if STM32_GPT_USE_TIM6
if (&GPTD6 == gptp) {
rccEnableTIM6(FALSE);
rccResetTIM6();
nvicEnableVector(STM32_TIM6_NUMBER,
CORTEX_PRIORITY_MASK(STM32_GPT_TIM6_IRQ_PRIORITY));
gptp->clock = STM32_TIMCLK1;
}
#endif
#if STM32_GPT_USE_TIM7
if (&GPTD7 == gptp) {
rccEnableTIM7(FALSE);
rccResetTIM7();
nvicEnableVector(STM32_TIM7_NUMBER,
CORTEX_PRIORITY_MASK(STM32_GPT_TIM7_IRQ_PRIORITY));
gptp->clock = STM32_TIMCLK1;
}
#endif
#if STM32_GPT_USE_TIM8
if (&GPTD8 == gptp) {
rccEnableTIM8(FALSE);
rccResetTIM8();
nvicEnableVector(STM32_TIM8_UP_NUMBER,
CORTEX_PRIORITY_MASK(STM32_GPT_TIM8_IRQ_PRIORITY));
gptp->clock = STM32_TIMCLK2;
}
#endif
#if STM32_GPT_USE_TIM9
if (&GPTD9 == gptp) {
rccEnableTIM9(FALSE);
rccResetTIM9();
nvicEnableVector(STM32_TIM9_NUMBER,
CORTEX_PRIORITY_MASK(STM32_GPT_TIM9_IRQ_PRIORITY));
gptp->clock = STM32_TIMCLK2;
}
#endif
#if STM32_GPT_USE_TIM11
if (&GPTD11 == gptp) {
rccEnableTIM11(FALSE);
rccResetTIM11();
nvicEnableVector(STM32_TIM11_NUMBER,
CORTEX_PRIORITY_MASK(STM32_GPT_TIM11_IRQ_PRIORITY));
gptp->clock = STM32_TIMCLK2;
}
#endif
#if STM32_GPT_USE_TIM12
if (&GPTD12 == gptp) {
rccEnableTIM12(FALSE);
rccResetTIM12();
nvicEnableVector(STM32_TIM12_NUMBER,
CORTEX_PRIORITY_MASK(STM32_GPT_TIM12_IRQ_PRIORITY));
gptp->clock = STM32_TIMCLK1;
}
#endif
#if STM32_GPT_USE_TIM14
if (&GPTD14 == gptp) {
rccEnableTIM14(FALSE);
rccResetTIM14();
nvicEnableVector(STM32_TIM14_NUMBER,
CORTEX_PRIORITY_MASK(STM32_GPT_TIM14_IRQ_PRIORITY));
gptp->clock = STM32_TIMCLK1;
}
#endif
}
/* Prescaler value calculation.*/
psc = (uint16_t)((gptp->clock / gptp->config->frequency) - 1);
chDbgAssert(((uint32_t)(psc + 1) * gptp->config->frequency) == gptp->clock,
"gpt_lld_start(), #1", "invalid frequency");
/* Timer configuration.*/
gptp->tim->CR1 = 0; /* Initially stopped. */
gptp->tim->CR2 = TIM_CR2_CCDS; /* DMA on UE (if any). */
gptp->tim->PSC = psc; /* Prescaler value. */
gptp->tim->DIER = 0;
}
/**
* @brief Deactivates the GPT peripheral.
*
* @param[in] gptp pointer to the @p GPTDriver object
*
* @notapi
*/
void gpt_lld_stop(GPTDriver *gptp) {
if (gptp->state == GPT_READY) {
gptp->tim->CR1 = 0; /* Timer disabled. */
gptp->tim->DIER = 0; /* All IRQs disabled. */
gptp->tim->SR = 0; /* Clear eventual pending IRQs. */
#if STM32_GPT_USE_TIM1
if (&GPTD1 == gptp) {
nvicDisableVector(STM32_TIM1_UP_NUMBER);
rccDisableTIM1(FALSE);
}
#endif
#if STM32_GPT_USE_TIM2
if (&GPTD2 == gptp) {
nvicDisableVector(STM32_TIM2_NUMBER);
rccDisableTIM2(FALSE);
}
#endif
#if STM32_GPT_USE_TIM3
if (&GPTD3 == gptp) {
nvicDisableVector(STM32_TIM3_NUMBER);
rccDisableTIM3(FALSE);
}
#endif
#if STM32_GPT_USE_TIM4
if (&GPTD4 == gptp) {
nvicDisableVector(STM32_TIM4_NUMBER);
rccDisableTIM4(FALSE);
}
#endif
#if STM32_GPT_USE_TIM5
if (&GPTD5 == gptp) {
nvicDisableVector(STM32_TIM5_NUMBER);
rccDisableTIM5(FALSE);
}
#endif
#if STM32_GPT_USE_TIM6
if (&GPTD6 == gptp) {
nvicDisableVector(STM32_TIM6_NUMBER);
rccDisableTIM6(FALSE);
}
#endif
#if STM32_GPT_USE_TIM7
if (&GPTD7 == gptp) {
nvicDisableVector(STM32_TIM7_NUMBER);
rccDisableTIM7(FALSE);
}
#endif
#if STM32_GPT_USE_TIM8
if (&GPTD8 == gptp) {
nvicDisableVector(STM32_TIM8_UP_NUMBER);
rccDisableTIM8(FALSE);
}
#endif
#if STM32_GPT_USE_TIM9
if (&GPTD9 == gptp) {
nvicDisableVector(STM32_TIM9_NUMBER);
rccDisableTIM9(FALSE);
}
#endif
#if STM32_GPT_USE_TIM11
if (&GPTD11 == gptp) {
nvicDisableVector(STM32_TIM11_NUMBER);
rccDisableTIM11(FALSE);
}
#endif
#if STM32_GPT_USE_TIM12
if (&GPTD12 == gptp) {
nvicDisableVector(STM32_TIM12_NUMBER);
rccDisableTIM12(FALSE);
}
#endif
#if STM32_GPT_USE_TIM14
if (&GPTD14 == gptp) {
nvicDisableVector(STM32_TIM14_NUMBER);
rccDisableTIM14(FALSE);
}
#endif
}
}
/**
* @brief Starts the timer in continuous mode.
*
* @param[in] gptp pointer to the @p GPTDriver object
* @param[in] interval period in ticks
*
* @notapi
*/
void gpt_lld_start_timer(GPTDriver *gptp, gptcnt_t interval) {
gptp->tim->ARR = interval - 1; /* Time constant. */
gptp->tim->EGR = TIM_EGR_UG; /* Update event. */
gptp->tim->CNT = 0; /* Reset counter. */
/* NOTE: After generating the UG event it takes several clock cycles before
SR bit 0 goes to 1. This is because the clearing of CNT has been inserted
before the clearing of SR, to give it some time.*/
gptp->tim->SR = 0; /* Clear pending IRQs (if any). */
gptp->tim->DIER = TIM_DIER_UIE; /* Update Event IRQ enabled. */
gptp->tim->CR1 = TIM_CR1_URS | TIM_CR1_CEN;
}
/**
* @brief Stops the timer.
*
* @param[in] gptp pointer to the @p GPTDriver object
*
* @notapi
*/
void gpt_lld_stop_timer(GPTDriver *gptp) {
gptp->tim->CR1 = 0; /* Initially stopped. */
gptp->tim->SR = 0; /* Clear pending IRQs (if any). */
gptp->tim->DIER = 0; /* Interrupts disabled. */
}
/**
* @brief Starts the timer in one shot mode and waits for completion.
* @details This function specifically polls the timer waiting for completion
* in order to not have extra delays caused by interrupt servicing,
* this function is only recommended for short delays.
*
* @param[in] gptp pointer to the @p GPTDriver object
* @param[in] interval time interval in ticks
*
* @notapi
*/
void gpt_lld_polled_delay(GPTDriver *gptp, gptcnt_t interval) {
gptp->tim->ARR = interval - 1; /* Time constant. */
gptp->tim->EGR = TIM_EGR_UG; /* Update event. */
gptp->tim->SR = 0; /* Clear pending IRQs (if any). */
gptp->tim->CR1 = TIM_CR1_OPM | TIM_CR1_URS | TIM_CR1_CEN;
while (!(gptp->tim->SR & TIM_SR_UIF))
;
}
#endif /* HAL_USE_GPT */
/** @} */
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