Add oscillator control wrappers

This commit is contained in:
George Oikonomou 2015-05-01 15:40:14 +01:00
parent b50ae639b3
commit b7e7d48f0b
3 changed files with 274 additions and 1 deletions

View File

@ -81,7 +81,7 @@ CONTIKI_CPU_SOURCEFILES += clock.c rtimer-arch.c cc26xx-rtc.c uart.c
CONTIKI_CPU_SOURCEFILES += cc26xx-rf.c contiki-watchdog.c
CONTIKI_CPU_SOURCEFILES += putchar.c ieee-addr.c batmon-sensor.c
CONTIKI_CPU_SOURCEFILES += slip-arch.c slip.c cc26xx-uart.c lpm.c
CONTIKI_CPU_SOURCEFILES += gpio-interrupt.c
CONTIKI_CPU_SOURCEFILES += gpio-interrupt.c oscillators.c
DEBUG_IO_SOURCEFILES += dbg-printf.c dbg-snprintf.c dbg-sprintf.c strformat.c

View File

@ -0,0 +1,172 @@
/*
* Copyright (c) 2015, 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 cc26xx-oscillators
* @{
*
* \file
* Implementation of CC26xxware oscillator control wrappers.
*/
/*---------------------------------------------------------------------------*/
#include "ti-lib.h"
#include <stdint.h>
/*---------------------------------------------------------------------------*/
static uint32_t
osc_interface_en(void)
{
uint32_t smph_clk_state;
/* Enable OSC DIG interface to change clock sources */
ti_lib_osc_interface_enable();
/* Save the state of the SMPH clock within AUX */
smph_clk_state = ti_lib_aux_wuc_clock_status(AUX_WUC_SMPH_CLOCK);
/* Make sure the SMPH clock within AUX is enabled */
ti_lib_aux_wuc_clock_enable(AUX_WUC_SMPH_CLOCK);
while(ti_lib_aux_wuc_clock_status(AUX_WUC_SMPH_CLOCK) != AUX_WUC_CLOCK_READY);
return smph_clk_state;
}
/*---------------------------------------------------------------------------*/
static void
osc_interface_dis(uint32_t smph_clk_state)
{
/* If the SMPH clock was off, turn it back off */
if(smph_clk_state == AUX_WUC_CLOCK_OFF) {
ti_lib_aux_wuc_clock_disable(AUX_WUC_SMPH_CLOCK);
}
/* Disable OSC DIG interface */
ti_lib_osc_interface_disable();
}
/*---------------------------------------------------------------------------*/
void
oscillators_select_lf_xosc(void)
{
/* Enable the Osc interface and remember the state of the SMPH clock */
uint32_t smph_clk_state = osc_interface_en();
/* Switch LF clock source to the LF XOSC if required */
if(ti_lib_osc_clock_source_get(OSC_SRC_CLK_LF) != OSC_XOSC_LF) {
ti_lib_osc_clock_source_set(OSC_SRC_CLK_LF, OSC_XOSC_LF);
/* Wait for LF clock source to become XOSC_LF */
while(ti_lib_osc_clock_source_get(OSC_SRC_CLK_LF) != OSC_XOSC_LF) ;
/* Disable the LF clock qualifiers */
ti_lib_ddi_16_bit_field_write(AUX_DDI0_OSC_BASE, DDI_0_OSC_O_CTL0,
DDI_0_OSC_CTL0_BYPASS_XOSC_LF_CLK_QUAL_M |
DDI_0_OSC_CTL0_BYPASS_RCOSC_LF_CLK_QUAL_M,
DDI_0_OSC_CTL0_BYPASS_RCOSC_LF_CLK_QUAL_S,
0x3);
}
/* Restore the SMPH clock and disable the OSC interface */
osc_interface_dis(smph_clk_state);
}
/*---------------------------------------------------------------------------*/
void
oscillators_select_lf_rcosc(void)
{
/* Enable the Osc interface and remember the state of the SMPH clock */
uint32_t smph_clk_state = osc_interface_en();
/* Switch LF clock source to the LF XOSC if required */
if(ti_lib_osc_clock_source_get(OSC_SRC_CLK_LF) != OSC_RCOSC_LF) {
ti_lib_osc_clock_source_set(OSC_SRC_CLK_LF, OSC_RCOSC_LF);
/* Wait for LF clock source to become XOSC_LF */
while(ti_lib_osc_clock_source_get(OSC_SRC_CLK_LF) != OSC_RCOSC_LF) ;
}
/* Restore the SMPH clock and disable the OSC interface */
osc_interface_dis(smph_clk_state);
}
/*---------------------------------------------------------------------------*/
void
oscillators_request_hf_xosc(void)
{
/* Enable the Osc interface and remember the state of the SMPH clock */
uint32_t smph_clk_state = osc_interface_en();
if(ti_lib_osc_clock_source_get(OSC_SRC_CLK_HF) != OSC_XOSC_HF) {
/*
* Request to switch to the crystal to enable radio operation. It takes a
* while for the XTAL to be ready so instead of performing the actual
* switch, we return and we do other stuff while the XOSC is getting ready.
*/
ti_lib_osc_clock_source_set(OSC_SRC_CLK_MF | OSC_SRC_CLK_HF, OSC_XOSC_HF);
}
/* Restore the SMPH clock and disable the OSC interface */
osc_interface_dis(smph_clk_state);
}
/*---------------------------------------------------------------------------*/
void
oscillators_switch_to_hf_xosc(void)
{
/* Enable the Osc interface and remember the state of the SMPH clock */
uint32_t smph_clk_state = osc_interface_en();
if(ti_lib_osc_clock_source_get(OSC_SRC_CLK_HF) != OSC_XOSC_HF) {
/* Switch the HF clock source (cc26xxware executes this from ROM) */
ti_lib_osc_hf_source_switch();
}
/* Restore the SMPH clock and disable the OSC interface */
osc_interface_dis(smph_clk_state);
}
/*---------------------------------------------------------------------------*/
void
oscillators_switch_to_hf_rc(void)
{
/* Enable the Osc interface and remember the state of the SMPH clock */
uint32_t smph_clk_state = osc_interface_en();
/* Set all clock sources to the HF RC Osc */
ti_lib_osc_clock_source_set(OSC_SRC_CLK_MF | OSC_SRC_CLK_HF, OSC_RCOSC_HF);
/* Check to not enable HF RC oscillator if already enabled */
if(ti_lib_osc_clock_source_get(OSC_SRC_CLK_HF) != OSC_RCOSC_HF) {
/* Switch the HF clock source (cc26xxware executes this from ROM) */
ti_lib_osc_hf_source_switch();
}
/* Restore the SMPH clock and disable the OSC interface */
osc_interface_dis(smph_clk_state);
}
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/

View File

@ -0,0 +1,101 @@
/*
* Copyright (c) 2015, 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 cc26xx
* @{
*
* \defgroup cc26xx-oscillators CC26XX oscillator control
*
* Wrapper around those CC26xxware OSC functions that we need in Contiki.
*
* All CC26xxware OSC control requires access to the semaphore module within
* AUX. Thus, in addition to enabling the oscillator interface, we need to
* start the clock to SMPH and restore it to its previous state when we are
* done.
* @{
*
* \file
* Header file for the CC26XX oscillator control
*/
/*---------------------------------------------------------------------------*/
#ifndef OSCILLATORS_H_
#define OSCILLATORS_H_
/*---------------------------------------------------------------------------*/
/**
* \brief Set the LF clock source to be the LF XOSC
*
* This function is only called once as soon as the system starts.
*
* Do not switch the LF clock source to the RC OSC for normal system operation
* See CC26xx Errata (swrz058)
*/
void oscillators_select_lf_xosc(void);
/**
* \brief Set the LF clock source to be the LF RCOSC
*
* This function is only called once, when the systen transitions to a full
* shutdown
*
* Do not switch the LF clock source to the RC OSC for normal system operation
* See CC26xx Errata (swrz058)
*/
void oscillators_select_lf_rcosc(void);
/**
* \brief Requests the HF XOSC as the source for the HF clock, but does not
* perform the actual switch.
*
* This triggers the startup sequence of the HF XOSC and returns so the CPU
* can perform other tasks while the XOSC is starting.
*
* The XOSC is requested as the source for the HF as well as the MF clock.
*/
void oscillators_request_hf_xosc(void);
/**
* \brief Performs the switch to the XOSC
*
* This function must be preceded by a call to oscillators_request_hf_xosc()
*/
void oscillators_switch_to_hf_xosc(void);
/**
* \brief Switches MF and HF clock source to be the HF RC OSC
*/
void oscillators_switch_to_hf_rc(void);
/*---------------------------------------------------------------------------*/
#endif /* OSCILLATORS_H_ */
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/