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| author | Theodore Ateba <tf.ateba@gmail.com> | 2017-08-13 14:18:30 +0000 |
|---|---|---|
| committer | Theodore Ateba <tf.ateba@gmail.com> | 2017-08-13 14:18:30 +0000 |
| commit | 0879845f96744ce1c0548d3abeb55c392ef47c00 (patch) | |
| tree | e5c0cbbe028f7bad6fc023c962bff3c6d463ae5b /os/hal/ports/AVR/TINY/LLD/TIMv1/hal_st_lld.h | |
| parent | cd06f9a246cf6c5d7009712d815dacf1632ffd64 (diff) | |
| download | ChibiOS-0879845f96744ce1c0548d3abeb55c392ef47c00.tar.gz ChibiOS-0879845f96744ce1c0548d3abeb55c392ef47c00.tar.bz2 ChibiOS-0879845f96744ce1c0548d3abeb55c392ef47c00.zip | |
Update the AVR Tiny Architecture.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@10412 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/ports/AVR/TINY/LLD/TIMv1/hal_st_lld.h')
| -rw-r--r-- | os/hal/ports/AVR/TINY/LLD/TIMv1/hal_st_lld.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/os/hal/ports/AVR/TINY/LLD/TIMv1/hal_st_lld.h b/os/hal/ports/AVR/TINY/LLD/TIMv1/hal_st_lld.h new file mode 100644 index 000000000..a5b58e693 --- /dev/null +++ b/os/hal/ports/AVR/TINY/LLD/TIMv1/hal_st_lld.h @@ -0,0 +1,168 @@ +/*
+ ChibiOS - Copyright (C) 2006..2016 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 hal_st_lld.h
+ * @brief ST Driver subsystem low level driver header.
+ * @details This header is designed to be include-able without having to
+ * include other files from the HAL.
+ *
+ * @addtogroup AVR
+ * @{
+ */
+
+#ifndef HAL_ST_LLD_H
+#define HAL_ST_LLD_H
+
+#include <avr/io.h>
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/*
+ * TODO: for models that have many timers,
+ * could add AVR_ST_USE_TIMER
+ */
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+/*
+ * TODO: error checks for valid timer selected
+ */
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void st_lld_init(void);
+#ifdef __cplusplus
+}
+#endif
+
+#if defined(__AVR_ATmega128__) || defined(__AVR_ATmega162__) || \
+ defined(__AVR_ATtiny85__)
+#define TIFR_REG TIFR
+#define TIMSK_REG TIMSK
+#else
+#define TIFR_REG TIFR1
+#define TIMSK_REG TIMSK1
+#endif
+
+/*===========================================================================*/
+/* Driver inline functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Returns the time counter value.
+ *
+ * @return The counter value.
+ *
+ * @notapi
+ */
+static inline systime_t st_lld_get_counter(void) {
+
+ return (systime_t) TCNT1;
+}
+
+/**
+ * @brief Starts the alarm.
+ * @note Makes sure that no spurious alarms are triggered after
+ * this call.
+ *
+ * @param[in] time the time to be set for the first alarm
+ *
+ * @notapi
+ */
+static inline void st_lld_start_alarm(systime_t time) {
+
+ OCR1A = (uint16_t) time;
+
+ /* Reset pending. */
+ TIFR_REG = _BV(OCF1A);
+
+ /* enable interrupt */
+ TIMSK_REG = _BV(OCIE1A);
+}
+
+/**
+ * @brief Stops the alarm interrupt.
+ *
+ * @notapi
+ */
+static inline void st_lld_stop_alarm(void) {
+
+ TIMSK_REG = 0;
+}
+
+/**
+ * @brief Sets the alarm time.
+ *
+ * @param[in] time the time to be set for the next alarm
+ *
+ * @notapi
+ */
+static inline void st_lld_set_alarm(systime_t time) {
+
+ OCR1A = (uint16_t) time;
+}
+
+/**
+ * @brief Returns the current alarm time.
+ *
+ * @return The currently set alarm time.
+ *
+ * @notapi
+ */
+static inline systime_t st_lld_get_alarm(void) {
+
+ return (systime_t) OCR1A;
+}
+
+/**
+ * @brief Determines if the alarm is active.
+ *
+ * @return The alarm status.
+ * @retval false if the alarm is not active.
+ * @retval true is the alarm is active
+ *
+ * @notapi
+ */
+static inline bool st_lld_is_alarm_active(void) {
+
+ return (bool) ((TIMSK_REG & _BV(OCIE1A)) != 0);
+}
+
+#endif /* HAL_ST_LLD_H */
+
+/** @} */
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