contiki/cpu/cc26xx-cc13xx/dev/soc-rtc.c
Jonas Olsson 01e36532c2 Add support for the CC13xx CPU
This commit:

* Moves all cpu files from cpu/cc26xx to cpu/cc26xx-cc13xx
* Bumps the CC26xxware submodule to the latest TI release
* Adds CC13xxware as a submodule
* Adds support for sub-ghz mode / IEEE 802.15.4g
* Splits the driver into multiple files for clarity. We now have the following structure:
  * A common module that handles access to the RF core, interrupts etc
  * A module that takes care of BLE functionality
  * A netstack radio driver for IEEE mode (2.4GHz)
  * A netstack radio driver for PROP mode (sub-ghz - multiple bands)

This commit also adds tick suppression functionality, applicable to all chips of the CC26xx and CC13xx families. Instead waking up on every clock tick simply to increment our software counter, we now only wake up just in time to service the next scheduled etimer. ContikiMAC-triggered wakeups are unaffected.

Laslty, this commit also applies a number of minor changes:
* Addition of missing includes
* Removal of stub functions
* Removal of a woraround for a CC26xxware bug that has now been fixed
2015-08-23 19:54:42 +01:00

168 lines
5.9 KiB
C

/*
* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup cc13xx-cc26xx-rtc
* @{
*
* \file
* Implementation of the CC13xx/CC26xx AON RTC driver
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "sys/energest.h"
#include "rtimer.h"
#include "lpm.h"
#include "ti-lib.h"
#include <stdint.h>
#include <stdbool.h>
/*---------------------------------------------------------------------------*/
#define soc_rtc_isr(...) AONRTCIntHandler(__VA_ARGS__)
/*---------------------------------------------------------------------------*/
/* Prototype of a function in clock.c. Called every time the handler fires */
void clock_update(void);
/*---------------------------------------------------------------------------*/
#define COMPARE_INCREMENT (RTIMER_SECOND / CLOCK_SECOND)
#define MULTIPLE_512_MASK 0xFFFFFE00
/*---------------------------------------------------------------------------*/
/*
* Used to test timer wraparounds.
*
* Set to 0xFFFFFFFA to test AON RTC second counter wraparound
* Set to 0xFFFA to test AON RTC 16.16 format wraparound
*/
#ifdef SOC_RTC_CONF_START_TICK_COUNT
#define SOC_RTC_START_TICK_COUNT SOC_RTC_CONF_START_TICK_COUNT
#else
#define SOC_RTC_START_TICK_COUNT 0
#endif
/*---------------------------------------------------------------------------*/
void
soc_rtc_init(void)
{
bool interrupts_disabled;
uint32_t next;
/* Disable and clear interrupts */
interrupts_disabled = ti_lib_int_master_disable();
ti_lib_aon_rtc_disable();
ti_lib_aon_rtc_event_clear(AON_RTC_CH0);
ti_lib_aon_rtc_event_clear(AON_RTC_CH1);
/* Setup the wakeup event */
ti_lib_aon_event_mcu_wake_up_set(AON_EVENT_MCU_WU0, AON_EVENT_RTC_CH0);
ti_lib_aon_event_mcu_wake_up_set(AON_EVENT_MCU_WU1, AON_EVENT_RTC_CH1);
ti_lib_aon_rtc_combined_event_config(AON_RTC_CH0 | AON_RTC_CH1);
HWREG(AON_RTC_BASE + AON_RTC_O_SEC) = SOC_RTC_START_TICK_COUNT;
next = ti_lib_aon_rtc_current_compare_value_get() + COMPARE_INCREMENT;
/* Configure channel 1 to start generating clock ticks. First tick at 512 */
ti_lib_aon_rtc_compare_value_set(AON_RTC_CH1, next);
/* Enable channel 1 and the RTC */
ti_lib_aon_rtc_channel_enable(AON_RTC_CH1);
ti_lib_aon_rtc_enable();
ti_lib_int_enable(INT_AON_RTC);
/* Re-enable interrupts */
if(!interrupts_disabled) {
ti_lib_int_master_enable();
}
}
/*---------------------------------------------------------------------------*/
rtimer_clock_t
soc_rtc_get_next_trigger()
{
rtimer_clock_t ch1 = ti_lib_aon_rtc_compare_value_get(AON_RTC_CH1);
if(HWREG(AON_RTC_BASE + AON_RTC_O_CHCTL) & AON_RTC_CHCTL_CH0_EN) {
rtimer_clock_t ch0 = ti_lib_aon_rtc_compare_value_get(AON_RTC_CH0);
return RTIMER_CLOCK_LT(ch0, ch1) ? ch0 : ch1;
}
return ch1;
}
/*---------------------------------------------------------------------------*/
void
soc_rtc_schedule_one_shot(uint32_t channel, uint32_t ticks)
{
if((channel != AON_RTC_CH0) && (channel != AON_RTC_CH1)) {
return;
}
/* Set the channel to fire a one-shot compare event at time==ticks */
ti_lib_aon_rtc_compare_value_set(channel, ticks);
ti_lib_aon_rtc_channel_enable(channel);
}
/*---------------------------------------------------------------------------*/
/* The AON RTC interrupt handler */
void
soc_rtc_isr(void)
{
uint32_t now, next;
ENERGEST_ON(ENERGEST_TYPE_IRQ);
now = ti_lib_aon_rtc_current_compare_value_get();
/* Adjust the s/w tick counter irrespective of which event trigger this */
clock_update();
if(ti_lib_aon_rtc_event_get(AON_RTC_CH1)) {
HWREG(AON_RTC_BASE + AON_RTC_O_EVFLAGS) = AON_RTC_EVFLAGS_CH1;
/*
* We need to keep ticking while we are awake, so we schedule the next
* event on the next 512 tick boundary. If we drop to deep sleep before it
* happens, lpm_drop() will reschedule us in the 'distant' future
*/
next = (now + COMPARE_INCREMENT) & MULTIPLE_512_MASK;
ti_lib_aon_rtc_compare_value_set(AON_RTC_CH1, next);
}
if(ti_lib_aon_rtc_event_get(AON_RTC_CH0)) {
ti_lib_aon_rtc_channel_disable(AON_RTC_CH0);
HWREG(AON_RTC_BASE + AON_RTC_O_EVFLAGS) = AON_RTC_EVFLAGS_CH0;
rtimer_run_next();
}
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
}
/*---------------------------------------------------------------------------*/
/** @} */