diff options
Diffstat (limited to 'os/hal/ports/NRF5/NRF51822/hal_gpt_lld.c')
| -rw-r--r-- | os/hal/ports/NRF5/NRF51822/hal_gpt_lld.c | 358 |
1 files changed, 0 insertions, 358 deletions
diff --git a/os/hal/ports/NRF5/NRF51822/hal_gpt_lld.c b/os/hal/ports/NRF5/NRF51822/hal_gpt_lld.c deleted file mode 100644 index 3fb14dd..0000000 --- a/os/hal/ports/NRF5/NRF51822/hal_gpt_lld.c +++ /dev/null @@ -1,358 +0,0 @@ -/*
- ChibiOS - 2015 Stephen Caudle
-
- 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 NRF51x22/gpt_lld.c
- * @brief NRF51x22 GPT subsystem low level driver source.
- *
- * @addtogroup GPT
- * @{
- */
-
-#include "hal.h"
-
-#if HAL_USE_GPT || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Driver local definitions. */
-/*===========================================================================*/
-
-#define NRF5_TIMER_PRESCALER_NUM 10
-#define NRF5_TIMER_COMPARE_NUM 4
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-/**
- * @brief GPTD1 driver identifier.
- * @note The driver GPTD1 allocates the complex timer TIM1 when enabled.
- */
-#if NRF5_GPT_USE_TIMER0 || defined(__DOXYGEN__)
-GPTDriver GPTD1;
-#endif
-
-/**
- * @brief GPTD2 driver identifier.
- * @note The driver GPTD2 allocates the timer TIM2 when enabled.
- */
-#if NRF5_GPT_USE_TIMER1 || defined(__DOXYGEN__)
-GPTDriver GPTD2;
-#endif
-
-/**
- * @brief GPTD3 driver identifier.
- * @note The driver GPTD3 allocates the timer TIM3 when enabled.
- */
-#if NRF5_GPT_USE_TIMER2 || defined(__DOXYGEN__)
-GPTDriver GPTD3;
-#endif
-
-/*===========================================================================*/
-/* Driver local variables and types. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-static uint8_t prescaler(uint16_t freq)
-{
- uint8_t i;
- static const gptfreq_t frequencies[] = {
- NRF5_GPT_FREQ_16MHZ,
- NRF5_GPT_FREQ_8MHZ,
- NRF5_GPT_FREQ_4MHZ,
- NRF5_GPT_FREQ_2MHZ,
- NRF5_GPT_FREQ_1MHZ,
- NRF5_GPT_FREQ_500KHZ,
- NRF5_GPT_FREQ_250KHZ,
- NRF5_GPT_FREQ_125KHZ,
- NRF5_GPT_FREQ_62500HZ,
- NRF5_GPT_FREQ_31250HZ,
- };
-
- for (i = 0; i < NRF5_TIMER_PRESCALER_NUM; i++)
- if (freq == frequencies[i])
- return i;
-
- osalDbgAssert(FALSE, "invalid timer frequency");
-
- return 0;
-}
-
-/**
- * @brief Shared IRQ handler.
- *
- * @param[in] gptp pointer to a @p GPTDriver object
- */
-static void gpt_lld_serve_interrupt(GPTDriver *gptp) {
-
- gptp->tim->EVENTS_COMPARE[gptp->cc_int] = 0;
- if (gptp->state == GPT_ONESHOT)
- gptp->state = GPT_READY; /* Back in GPT_READY state. */
- gptp->config->callback(gptp);
-}
-
-/*===========================================================================*/
-/* Driver interrupt handlers. */
-/*===========================================================================*/
-
-#if NRF5_GPT_USE_TIMER0
-/**
- * @brief TIMER0 interrupt handler.
- *
- * @isr
- */
-OSAL_IRQ_HANDLER(Vector60) {
-
- OSAL_IRQ_PROLOGUE();
-
- gpt_lld_serve_interrupt(&GPTD1);
-
- OSAL_IRQ_EPILOGUE();
-}
-#endif /* NRF5_GPT_USE_TIMER0 */
-
-#if NRF5_GPT_USE_TIMER1
-/**
- * @brief TIMER1 interrupt handler.
- *
- * @isr
- */
-OSAL_IRQ_HANDLER(Vector64) {
-
- OSAL_IRQ_PROLOGUE();
-
- gpt_lld_serve_interrupt(&GPTD2);
-
- OSAL_IRQ_EPILOGUE();
-}
-#endif /* NRF5_GPT_USE_TIMER1 */
-
-#if NRF5_GPT_USE_TIMER2
-/**
- * @brief TIMER2 interrupt handler.
- *
- * @isr
- */
-OSAL_IRQ_HANDLER(Vector68) {
-
- OSAL_IRQ_PROLOGUE();
-
- gpt_lld_serve_interrupt(&GPTD3);
-
- OSAL_IRQ_EPILOGUE();
-}
-#endif /* NRF5_GPT_USE_TIMER2 */
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Low level GPT driver initialization.
- *
- * @notapi
- */
-void gpt_lld_init(void) {
-
-#if NRF5_GPT_USE_TIMER0
- /* Driver initialization.*/
- GPTD1.tim = NRF_TIMER0;
- gptObjectInit(&GPTD1);
-#endif
-
-#if NRF5_GPT_USE_TIMER1
- /* Driver initialization.*/
- GPTD2.tim = NRF_TIMER1;
- gptObjectInit(&GPTD2);
-#endif
-
-#if NRF5_GPT_USE_TIMER2
- /* Driver initialization.*/
- GPTD3.tim = NRF_TIMER2;
- gptObjectInit(&GPTD3);
-#endif
-}
-
-/**
- * @brief Configures and activates the GPT peripheral.
- *
- * @param[in] gptp pointer to the @p GPTDriver object
- *
- * @notapi
- */
-void gpt_lld_start(GPTDriver *gptp) {
-
- NRF_TIMER_Type *tim = gptp->tim;
-
- if (gptp->state == GPT_STOP) {
- osalDbgAssert(gptp->cc_int < NRF5_TIMER_COMPARE_NUM,
- "invalid capture/compare index");
-
- tim->INTENSET = TIMER_INTENSET_COMPARE0_Msk << gptp->cc_int;
-#if NRF5_GPT_USE_TIMER0
- if (&GPTD1 == gptp)
- nvicEnableVector(TIMER0_IRQn, NRF5_GPT_TIMER0_IRQ_PRIORITY);
-#endif
-#if NRF5_GPT_USE_TIMER1
- if (&GPTD2 == gptp)
- nvicEnableVector(TIMER1_IRQn, NRF5_GPT_TIMER1_IRQ_PRIORITY);
-#endif
-#if NRF5_GPT_USE_TIMER2
- if (&GPTD3 == gptp)
- nvicEnableVector(TIMER2_IRQn, NRF5_GPT_TIMER2_IRQ_PRIORITY);
-#endif
- }
-
- /* Prescaler value calculation.*/
- tim->PRESCALER = prescaler(gptp->config->frequency);
-
- /* Timer configuration.*/
- tim->MODE = TIMER_MODE_MODE_Timer << TIMER_MODE_MODE_Pos;
-
- switch (gptp->config->resolution) {
-
- case 8:
- tim->BITMODE = TIMER_BITMODE_BITMODE_08Bit << TIMER_BITMODE_BITMODE_Pos;
- break;
-
- case 16:
- tim->BITMODE = TIMER_BITMODE_BITMODE_16Bit << TIMER_BITMODE_BITMODE_Pos;
- break;
-
-#if NRF5_GPT_USE_TIMER0
- case 24:
- tim->BITMODE = TIMER_BITMODE_BITMODE_24Bit << TIMER_BITMODE_BITMODE_Pos;
- break;
-
- case 32:
- tim->BITMODE = TIMER_BITMODE_BITMODE_32Bit << TIMER_BITMODE_BITMODE_Pos;
- break;
-#endif
-
- default:
- osalDbgAssert(FALSE, "invalid timer resolution");
- break;
- };
-}
-
-/**
- * @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->TASKS_SHUTDOWN = 1;
-
-#if NRF5_GPT_USE_TIMER0
- if (&GPTD1 == gptp)
- nvicDisableVector(TIMER0_IRQn);
-#endif
-#if NRF5_GPT_USE_TIMER1
- if (&GPTD2 == gptp)
- nvicDisableVector(TIMER1_IRQn);
-#endif
-#if NRF5_GPT_USE_TIMER2
- if (&GPTD3 == gptp)
- nvicDisableVector(TIMER2_IRQn);
-#endif
- gptp->tim->INTENCLR = TIMER_INTENSET_COMPARE0_Msk << gptp->cc_int;
- }
-}
-
-/**
- * @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) {
-
- NRF_TIMER_Type *tim = gptp->tim;
-
- tim->TASKS_CLEAR = 1;
- tim->CC[gptp->cc_int] = (uint32_t)(interval - 1); /* Time constant. */
- if (gptp->state == GPT_ONESHOT)
- gptp->tim->SHORTS = TIMER_SHORTS_COMPARE0_STOP_Msk << gptp->cc_int;
- else if (gptp->state == GPT_CONTINUOUS)
- gptp->tim->SHORTS = TIMER_SHORTS_COMPARE0_CLEAR_Msk << gptp->cc_int;
- tim->TASKS_START = 1;
-}
-
-/**
- * @brief Stops the timer.
- *
- * @param[in] gptp pointer to the @p GPTDriver object
- *
- * @notapi
- */
-void gpt_lld_stop_timer(GPTDriver *gptp) {
-
- gptp->tim->TASKS_STOP = 1;
-}
-
-/**
- * @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) {
-
- NRF_TIMER_Type *tim = gptp->tim;
-
- tim->INTENCLR = (1UL << gptp->cc_int) << TIMER_INTENSET_COMPARE0_Pos;
- tim->TASKS_CLEAR = 1;
- tim->CC[gptp->cc_int] = (uint32_t)(interval - 1); /* Time constant. */
- tim->TASKS_START = 1;
- while (!(tim->INTENSET & (TIMER_INTENSET_COMPARE0_Msk << gptp->cc_int)))
- ;
- tim->INTENSET = TIMER_INTENSET_COMPARE0_Msk << gptp->cc_int;
-}
-
-/**
- * @brief Returns the counter value of GPT peripheral.
- * @pre The GPT unit must be running in continuous mode.
- * @note The nature of the counter is not defined, it may count upward
- * or downward, it could be continuously running or not.
- *
- * @param[in] gptp pointer to a @p GPTDriver object
- * @return The current counter value.
- *
- * @notapi
- */
-gptcnt_t gpt_lld_get_counter(GPTDriver *gptp) {
-
- gptp->tim->TASKS_CAPTURE[gptp->cc_get] = 1;
- return gptp->tim->CC[gptp->cc_get];
-}
-
-#endif /* HAL_USE_GPT */
-
-/** @} */
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