diff options
Diffstat (limited to 'os/hal/ports/NRF5/LLD/TIMERv1/hal_st_lld.c')
| -rw-r--r-- | os/hal/ports/NRF5/LLD/TIMERv1/hal_st_lld.c | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/os/hal/ports/NRF5/LLD/TIMERv1/hal_st_lld.c b/os/hal/ports/NRF5/LLD/TIMERv1/hal_st_lld.c new file mode 100644 index 0000000..20aa6e0 --- /dev/null +++ b/os/hal/ports/NRF5/LLD/TIMERv1/hal_st_lld.c @@ -0,0 +1,328 @@ +/*
+ ChibiOS - Copyright (C) 2015 Fabio Utzig
+ 2016 Stephane D'Alu
+
+ 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 TIMERv1/hal_st_lld.c
+ * @brief NRF5 ST subsystem low level driver source.
+ *
+ * @addtogroup ST
+ * @{
+ */
+
+#include "hal.h"
+
+#if (OSAL_ST_MODE != OSAL_ST_MODE_NONE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+#if (OSAL_ST_MODE == OSAL_ST_MODE_PERIODIC) || defined(__DOXYGEN__)
+#if NRF5_ST_USE_RTC0 == TRUE
+/**
+ * @brief System Timer vector (RTC0)
+ * @details This interrupt is used for system tick in periodic mode
+ * if selected with NRF5_ST_USE_RTC0
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(Vector6C) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ NRF_RTC0->EVENTS_TICK = 0;
+#if CORTEX_MODEL >= 4
+ (void)NRF_RTC0->EVENTS_TICK;
+#endif
+
+ osalSysLockFromISR();
+ osalOsTimerHandlerI();
+ osalSysUnlockFromISR();
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+#if NRF5_ST_USE_RTC1 == TRUE
+/**
+ * @brief System Timer vector (RTC1)
+ * @details This interrupt is used for system tick in periodic mode
+ * if selected with NRF5_ST_USE_RTC1
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(Vector84) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ NRF_RTC1->EVENTS_TICK = 0;
+#if CORTEX_MODEL >= 4
+ (void)NRF_RTC1->EVENTS_TICK;
+#endif
+
+ osalSysLockFromISR();
+ osalOsTimerHandlerI();
+ osalSysUnlockFromISR();
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+#if NRF5_ST_USE_TIMER0 == TRUE
+/**
+ * @brief System Timer vector. (TIMER0)
+ * @details This interrupt is used for system tick in periodic mode
+ * if selected with NRF5_ST_USE_TIMER0
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(Vector60) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ /* Clear timer compare event */
+ if (NRF_TIMER0->EVENTS_COMPARE[0] != 0) {
+ NRF_TIMER0->EVENTS_COMPARE[0] = 0;
+#if CORTEX_MODEL >= 4
+ (void)NRF_TIMER0->EVENTS_COMPARE[0];
+#endif
+
+ osalSysLockFromISR();
+ osalOsTimerHandlerI();
+ osalSysUnlockFromISR();
+ }
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_PERIODIC */
+
+#if (OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING) || defined(__DOXYGEN__)
+#if NRF5_ST_USE_RTC0 == TRUE
+/**
+ * @brief System Timer vector (RTC0)
+ * @details This interrupt is used for freerunning mode (tick-less)
+ * if selected with NRF5_ST_USE_RTC0
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(Vector6C) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ if (NRF_RTC0->EVENTS_COMPARE[0]) {
+ NRF_RTC0->EVENTS_COMPARE[0] = 0;
+#if CORTEX_MODEL >= 4
+ (void)NRF_RTC0->EVENTS_COMPARE[0];
+#endif
+
+ osalSysLockFromISR();
+ osalOsTimerHandlerI();
+ osalSysUnlockFromISR();
+ }
+
+#if OSAL_ST_RESOLUTION == 16
+ if (NRF_RTC0->EVENTS_COMPARE[1]) {
+ NRF_RTC0->EVENTS_COMPARE[1] = 0;
+#if CORTEX_MODEL >= 4
+ (void)NRF_RTC0->EVENTS_COMPARE[1];
+#endif
+ NRF_RTC0->TASKS_CLEAR = 1;
+ }
+#endif
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+#if NRF5_ST_USE_RTC1 == TRUE
+/**
+ * @brief System Timer vector (RTC1)
+ * @details This interrupt is used for freerunning mode (tick-less)
+ * if selected with NRF5_ST_USE_RTC1
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(Vector84) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ if (NRF_RTC1->EVENTS_COMPARE[0]) {
+ NRF_RTC1->EVENTS_COMPARE[0] = 0;
+#if CORTEX_MODEL >= 4
+ (void)NRF_RTC1->EVENTS_COMPARE[0];
+#endif
+
+ osalSysLockFromISR();
+ osalOsTimerHandlerI();
+ osalSysUnlockFromISR();
+ }
+
+#if OSAL_ST_RESOLUTION == 16
+ if (NRF_RTC1->EVENTS_COMPARE[1]) {
+ NRF_RTC1->EVENTS_COMPARE[1] = 0;
+#if CORTEX_MODEL >= 4
+ (void)NRF_RTC1->EVENTS_COMPARE[1];
+#endif
+ NRF_RTC1->TASKS_CLEAR = 1;
+ }
+#endif
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING */
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level ST driver initialization.
+ *
+ * @notapi
+ */
+void st_lld_init(void) {
+#if OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING
+
+#if NRF5_ST_USE_RTC0 == TRUE
+ /* Using RTC with prescaler */
+ NRF_RTC0->TASKS_STOP = 1;
+ NRF_RTC0->PRESCALER = (NRF5_LFCLK_FREQUENCY / OSAL_ST_FREQUENCY) - 1;
+ NRF_RTC0->EVTENCLR = RTC_EVTENSET_COMPARE0_Msk;
+ NRF_RTC0->EVENTS_COMPARE[0] = 0;
+#if CORTEX_MODEL >= 4
+ (void)NRF_RTC0->EVENTS_COMPARE[0];
+#endif
+ NRF_RTC0->INTENSET = RTC_INTENSET_COMPARE0_Msk;
+#if OSAL_ST_RESOLUTION == 16
+ NRF_RTC0->CC[1] = 0x10000; /* 2^16 */
+ NRF_RTC0->EVENTS_COMPARE[1] = 0;
+#if CORTEX_MODEL >= 4
+ (void)NRF_RTC0->EVENTS_COMPARE[1];
+#endif
+ NRF_RTC0->EVTENSET = RTC_EVTENSET_COMPARE0_Msk;
+ NRF_RTC0->INTENSET = RTC_INTENSET_COMPARE1_Msk;
+#endif
+ NRF_RTC0->TASKS_CLEAR = 1;
+
+ /* Start timer */
+ nvicEnableVector(RTC0_IRQn, NRF5_ST_PRIORITY);
+ NRF_RTC0->TASKS_START = 1;
+#endif /* NRF5_ST_USE_RTC0 == TRUE */
+
+#if NRF5_ST_USE_RTC1 == TRUE
+ /* Using RTC with prescaler */
+ NRF_RTC1->TASKS_STOP = 1;
+ NRF_RTC1->PRESCALER = (NRF5_LFCLK_FREQUENCY / OSAL_ST_FREQUENCY) - 1;
+ NRF_RTC1->EVTENCLR = RTC_EVTENSET_COMPARE0_Msk;
+ NRF_RTC1->EVENTS_COMPARE[0] = 0;
+#if CORTEX_MODEL >= 4
+ (void)NRF_RTC1->EVENTS_COMPARE[0];
+#endif
+ NRF_RTC1->INTENSET = RTC_INTENSET_COMPARE0_Msk;
+#if OSAL_ST_RESOLUTION == 16
+ NRF_RTC1->CC[1] = 0x10000; /* 2^16 */
+ NRF_RTC1->EVENTS_COMPARE[1] = 0;
+#if CORTEX_MODEL >= 4
+ NRF_RTC1->EVENTS_COMPARE[1];
+#endif
+ NRF_RTC1->EVTENSET = RTC_EVTENSET_COMPARE0_Msk;
+ NRF_RTC1->INTENSET = RTC_INTENSET_COMPARE1_Msk;
+#endif
+ NRF_RTC1->TASKS_CLEAR = 1;
+
+ /* Start timer */
+ nvicEnableVector(RTC1_IRQn, NRF5_ST_PRIORITY);
+ NRF_RTC1->TASKS_START = 1;
+#endif /* NRF5_ST_USE_RTC1 == TRUE */
+
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING */
+
+#if OSAL_ST_MODE == OSAL_ST_MODE_PERIODIC
+
+#if NRF5_ST_USE_RTC0 == TRUE
+ /* Using RTC with prescaler */
+ NRF_RTC0->TASKS_STOP = 1;
+ NRF_RTC0->PRESCALER = (NRF5_LFCLK_FREQUENCY / OSAL_ST_FREQUENCY) - 1;
+ NRF_RTC0->INTENSET = RTC_INTENSET_TICK_Msk;
+
+ /* Start timer */
+ nvicEnableVector(RTC0_IRQn, NRF5_ST_PRIORITY);
+ NRF_RTC0->TASKS_START = 1;
+#endif /* NRF5_ST_USE_RTC0 == TRUE */
+
+#if NRF5_ST_USE_RTC1 == TRUE
+ /* Using RTC with prescaler */
+ NRF_RTC1->TASKS_STOP = 1;
+ NRF_RTC1->PRESCALER = (NRF5_LFCLK_FREQUENCY / OSAL_ST_FREQUENCY) - 1;
+ NRF_RTC1->INTENSET = RTC_INTENSET_TICK_Msk;
+
+ /* Start timer */
+ nvicEnableVector(RTC1_IRQn, NRF5_ST_PRIORITY);
+ NRF_RTC1->TASKS_START = 1;
+#endif /* NRF5_ST_USE_RTC1 == TRUE */
+
+#if NRF5_ST_USE_TIMER0 == TRUE
+ NRF_TIMER0->TASKS_CLEAR = 1;
+
+ /*
+ * Using 32-bit mode with prescaler 1/16 configures this
+ * timer with a 1MHz clock, reducing power consumption.
+ */
+ NRF_TIMER0->BITMODE = TIMER_BITMODE_BITMODE_32Bit;
+ NRF_TIMER0->PRESCALER = 4;
+
+ /*
+ * Configure timer 0 compare capture 0 to generate interrupt
+ * and clear timer value when event is generated.
+ */
+ NRF_TIMER0->CC[0] = (1000000 / OSAL_ST_FREQUENCY) - 1;
+ NRF_TIMER0->SHORTS = 1;
+ NRF_TIMER0->INTENSET = TIMER_INTENSET_COMPARE0_Msk;
+
+ /* Start timer */
+ nvicEnableVector(TIMER0_IRQn, NRF5_ST_PRIORITY);
+ NRF_TIMER0->TASKS_START = 1;
+#endif /* NRF5_ST_USE_TIMER0 == TRUE */
+
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_PERIODIC */
+}
+
+#endif /* OSAL_ST_MODE != OSAL_ST_MODE_NONE */
+
+/** @} */
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