diff options
Diffstat (limited to 'os/hal/ports/KINETIS/K20x/gpt_lld.c')
| -rw-r--r-- | os/hal/ports/KINETIS/K20x/gpt_lld.c | 372 |
1 files changed, 0 insertions, 372 deletions
diff --git a/os/hal/ports/KINETIS/K20x/gpt_lld.c b/os/hal/ports/KINETIS/K20x/gpt_lld.c deleted file mode 100644 index 09d759b..0000000 --- a/os/hal/ports/KINETIS/K20x/gpt_lld.c +++ /dev/null @@ -1,372 +0,0 @@ -/*
- ChibiOS - Copyright (C) 2014 Derek Mulcahy
-
- 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 KINETIS/gpt_lld.c
- * @brief KINETIS GPT subsystem low level driver source.
- *
- * @addtogroup GPT
- * @{
- */
-
-#include "hal.h"
-
-#if HAL_USE_GPT || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Driver local definitions. */
-/*===========================================================================*/
-
-#define KINETIS_PIT0_HANDLER VectorB8
-#define KINETIS_PIT1_HANDLER VectorBC
-#define KINETIS_PIT2_HANDLER VectorC0
-#define KINETIS_PIT3_HANDLER VectorC4
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-/**
- * @brief GPTD1 driver identifier.
- * @note The driver GPTD1 allocates the complex timer PIT0 when enabled.
- */
-#if KINETIS_GPT_USE_PIT0 || defined(__DOXYGEN__)
-GPTDriver GPTD1;
-#endif
-
-/**
- * @brief GPTD2 driver identifier.
- * @note The driver GPTD2 allocates the timer PIT1 when enabled.
- */
-#if KINETIS_GPT_USE_PIT1 || defined(__DOXYGEN__)
-GPTDriver GPTD2;
-#endif
-
-/**
- * @brief GPTD3 driver identifier.
- * @note The driver GPTD3 allocates the timer PIT2 when enabled.
- */
-#if KINETIS_GPT_USE_PIT2 || defined(__DOXYGEN__)
-GPTDriver GPTD3;
-#endif
-
-/**
- * @brief GPTD4 driver identifier.
- * @note The driver GPTD4 allocates the timer PIT3 when enabled.
- */
-#if KINETIS_GPT_USE_PIT3 || defined(__DOXYGEN__)
-GPTDriver GPTD4;
-#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) {
-
- /* Clear the interrupt */
- gptp->channel->TFLG |= PIT_TCTRL_TIE;
-
- 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 KINETIS_GPT_USE_PIT0
-#if !defined(KINETIS_PIT0_HANDLER)
-#error "KINETIS_PIT0_HANDLER not defined"
-#endif
-/**
- * @brief PIT1 interrupt handler.
- *
- * @isr
- */
-OSAL_IRQ_HANDLER(KINETIS_PIT0_HANDLER) {
-
- OSAL_IRQ_PROLOGUE();
-
- gpt_lld_serve_interrupt(&GPTD1);
-
- OSAL_IRQ_EPILOGUE();
-}
-#endif /* KINETIS_GPT_USE_PIT0 */
-
-#if KINETIS_GPT_USE_PIT1
-#if !defined(KINETIS_PIT1_HANDLER)
-#error "KINETIS_PIT1_HANDLER not defined"
-#endif
-/**
- * @brief PIT1 interrupt handler.
- *
- * @isr
- */
-OSAL_IRQ_HANDLER(KINETIS_PIT1_HANDLER) {
-
- OSAL_IRQ_PROLOGUE();
-
- gpt_lld_serve_interrupt(&GPTD2);
-
- OSAL_IRQ_EPILOGUE();
-}
-#endif /* KINETIS_GPT_USE_PIT1 */
-
-#if KINETIS_GPT_USE_PIT2
-#if !defined(KINETIS_PIT2_HANDLER)
-#error "KINETIS_PIT2_HANDLER not defined"
-#endif
-/**
- * @brief PIT2 interrupt handler.
- *
- * @isr
- */
-OSAL_IRQ_HANDLER(KINETIS_PIT2_HANDLER) {
-
- OSAL_IRQ_PROLOGUE();
-
- gpt_lld_serve_interrupt(&GPTD3);
-
- OSAL_IRQ_EPILOGUE();
-}
-#endif /* KINETIS_GPT_USE_PIT2 */
-
-#if KINETIS_GPT_USE_PIT3
-#if !defined(KINETIS_PIT3_HANDLER)
-#error "KINETIS_PIT3_HANDLER not defined"
-#endif
-/**
- * @brief PIT3 interrupt handler.
- *
- * @isr
- */
-OSAL_IRQ_HANDLER(KINETIS_PIT3_HANDLER) {
-
- OSAL_IRQ_PROLOGUE();
-
- gpt_lld_serve_interrupt(&GPTD4);
-
- OSAL_IRQ_EPILOGUE();
-}
-#endif /* KINETIS_GPT_USE_PIT3 */
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Low level GPT driver initialization.
- *
- * @notapi
- */
-void gpt_lld_init(void) {
-
-#if KINETIS_GPT_USE_PIT0
- /* Driver initialization.*/
- GPTD1.channel = &PIT->CHANNEL[0];
- gptObjectInit(&GPTD1);
-#endif
-
-#if KINETIS_GPT_USE_PIT1
- /* Driver initialization.*/
- GPTD2.channel = &PIT->CHANNEL[1];
- gptObjectInit(&GPTD2);
-#endif
-
-#if KINETIS_GPT_USE_PIT2
- /* Driver initialization.*/
- GPTD3.channel = &PIT->CHANNEL[2];
- gptObjectInit(&GPTD3);
-#endif
-
-#if KINETIS_GPT_USE_PIT3
- /* Driver initialization.*/
- GPTD4.channel = &PIT->CHANNEL[3];
- gptObjectInit(&GPTD4);
-#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.*/
- SIM->SCGC6 |= SIM_SCGC6_PIT;
- gptp->clock = KINETIS_SYSCLK_FREQUENCY;
-
-#if KINETIS_GPT_USE_PIT0
- if (&GPTD1 == gptp) {
- nvicEnableVector(PITChannel0_IRQn, KINETIS_GPT_PIT0_IRQ_PRIORITY);
- }
-#endif
-#if KINETIS_GPT_USE_PIT1
- if (&GPTD2 == gptp) {
- nvicEnableVector(PITChannel1_IRQn, KINETIS_GPT_PIT1_IRQ_PRIORITY);
- }
-#endif
-#if KINETIS_GPT_USE_PIT2
- if (&GPTD3 == gptp) {
- nvicEnableVector(PITChannel2_IRQn, KINETIS_GPT_PIT2_IRQ_PRIORITY);
- }
-#endif
-#if KINETIS_GPT_USE_PIT3
- if (&GPTD4 == gptp) {
- nvicEnableVector(PITChannel3_IRQn, KINETIS_GPT_PIT3_IRQ_PRIORITY);
- }
-#endif
-
- }
-
- /* Prescaler value calculation.*/
- psc = (uint16_t)((gptp->clock / gptp->config->frequency) - 1);
- osalDbgAssert(((uint32_t)(psc + 1) * gptp->config->frequency) == gptp->clock,
- "invalid frequency");
-
- /* Enable the PIT */
- PIT->MCR = 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) {
- SIM->SCGC6 &= ~SIM_SCGC6_PIT;
-
- /* Disable the channel */
- gptp->channel->TCTRL = 0;
-
- /* Clear pending interrupts */
- gptp->channel->TFLG |= PIT_TFLG_TIF;
-
-#if KINETIS_GPT_USE_PIT0
- if (&GPTD1 == gptp) {
- nvicDisableVector(PITChannel0_IRQn);
- }
-#endif
-#if KINETIS_GPT_USE_PIT1
- if (&GPTD2 == gptp) {
- nvicDisableVector(PITChannel1_IRQn);
- }
-#endif
-#if KINETIS_GPT_USE_PIT2
- if (&GPTD3 == gptp) {
- nvicDisableVector(PITChannel2_IRQn);
- }
-#endif
-#if KINETIS_GPT_USE_PIT3
- if (&GPTD4 == gptp) {
- nvicDisableVector(PITChannel3_IRQn);
- }
-#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) {
-
- /* Clear pending interrupts */
- gptp->channel->TFLG |= PIT_TFLG_TIF;
-
- /* Set the interval */
- gptp->channel->LDVAL = (gptp->clock / gptp->config->frequency) * interval;
-
- /* Start the timer */
- gptp->channel->TCTRL |= PIT_TCTRL_TIE | PIT_TCTRL_TEN;
-}
-
-/**
- * @brief Stops the timer.
- *
- * @param[in] gptp pointer to the @p GPTDriver object
- *
- * @notapi
- */
-void gpt_lld_stop_timer(GPTDriver *gptp) {
-
- /* Stop the timer */
- gptp->channel->TCTRL = 0;
-}
-
-/**
- * @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) {
- struct PIT_CHANNEL *channel = gptp->channel;
-
- /* Disable timer and disable interrupts */
- channel->TCTRL = 0;
-
- /* Clear the interrupt flag */
- channel->TFLG |= PIT_TFLG_TIF;
-
- /* Set the interval */
- channel->LDVAL = (gptp->clock / gptp->config->frequency) * interval;
-
- /* Enable Timer but keep interrupts disabled */
- channel->TCTRL = PIT_TCTRL_TEN;
-
- /* Wait for the interrupt flag to be set */
- while (!(channel->TFLG & PIT_TFLG_TIF))
- ;
-
- /* Disable timer and disable interrupts */
- channel->TCTRL = 0;
-}
-
-#endif /* HAL_USE_GPT */
-
-/** @} */
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