mirror of https://github.com/ARMmbed/mbed-os.git
startup configuraton of LF oscilator over mbed configuration system.
Andrzej Puzdrowski
parent
d99843745b
commit
be4687540c
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@ -44,6 +44,7 @@
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#include <stdbool.h>
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#include "nrf.h"
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#include "system_nrf51.h"
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#include "nrf5x_lf_clk_helper.h"
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/*lint ++flb "Enter library region" */
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@ -104,31 +105,7 @@ void SystemInit(void)
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*(uint32_t volatile *)0x4006EC14 = 0xC0;
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}
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#define NRF_LF_SRC_XTAL 2
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#define NRF_LF_SRC_SYNTH 3
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#define NRF_LF_SRC_RC 4
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//MBED_CONF_APP_NORDIC_NRF_LF_CLOCK_SRC
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#if MBED_CONF_APP_NORDIC_NRF_LF_CLOCK_SRC == NRF_LF_SRC_SYNTH
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#define CLOCK_LFCLKSRC_SRC_TO_USE (CLOCK_LFCLKSRC_SRC_Synth)
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#warning synhetic clock
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#elif MBED_CONF_APP_NORDIC_NRF_LF_CLOCK_SRC == NRF_LF_SRC_XTAL
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#define CLOCK_LFCLKSRC_SRC_TO_USE (CLOCK_LFCLKSRC_SRC_Xtal)
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#warning crystal clock
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#elif MBED_CONF_APP_NORDIC_NRF_LF_CLOCK_SRC == NRF_LF_SRC_RC // and undefined
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#define CLOCK_LFCLKSRC_SRC_TO_USE (CLOCK_LFCLKSRC_SRC_RC)
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#warning RC clock
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#else
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#error Bad LFCLK configuration. Declare proper source through mbed configuration.
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#endif
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#undef NRF_LF_SRC_XTAL
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#undef NRF_LF_SRC_SYNTH
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#undef NRF_LF_SRC_RC
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// Start the external 32khz crystal oscillator.
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//NRF_CLOCK->LFCLKSRC = (CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos);
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// Start the LF oscilator according to the mbed configuration (over the nrf5x_lf_clk_helper.h file)
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NRF_CLOCK->LFCLKSRC = (CLOCK_LFCLKSRC_SRC_TO_USE << CLOCK_LFCLKSRC_SRC_Pos);
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NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
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NRF_CLOCK->TASKS_LFCLKSTART = 1;
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@ -41,6 +41,7 @@
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#include <stdbool.h>
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#include "nrf.h"
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#include "system_nrf52.h"
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#include "nrf5x_lf_clk_helper.h"
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/*lint ++flb "Enter library region" */
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@ -197,8 +198,8 @@ void SystemInit(void)
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SystemCoreClockUpdate();
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// Start the external 32khz crystal oscillator.
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NRF_CLOCK->LFCLKSRC = (CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos);
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// Start the LF oscilator according to the mbed configuration (over the nrf5x_lf_clk_helper.h file)
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NRF_CLOCK->LFCLKSRC = (CLOCK_LFCLKSRC_SRC_TO_USE << CLOCK_LFCLKSRC_SRC_Pos);
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NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
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NRF_CLOCK->TASKS_LFCLKSTART = 1;
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@ -0,0 +1,66 @@
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/*
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* Copyright (c) 2016 Nordic Semiconductor ASA
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic Semiconductor ASA
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* integrated circuit in a product or a software update for such product, must reproduce
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* the above copyright notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its contributors may be
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* used to endorse or promote products derived from this software without specific prior
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* written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary or object form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef __NRF5X_LF_CLK_HELPER_H_
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#ifndef MBED_CONF_APP_NORDIC_NRF_LF_CLOCK_SRC
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#define MBED_CONF_APP_NORDIC_NRF_LF_CLOCK_SRC (NRF_LF_SRC_XTAL)
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#warning Non of LF clk src configurartion! Sett to LF Xtal.
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#endif
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#define NRF_LF_SRC_XTAL 2
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#define NRF_LF_SRC_SYNTH 3
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#define NRF_LF_SRC_RC 4
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#if MBED_CONF_APP_NORDIC_NRF_LF_CLOCK_SRC == NRF_LF_SRC_SYNTH
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#define CLOCK_LFCLKSRC_SRC_TO_USE (CLOCK_LFCLKSRC_SRC_Synth)
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#elif MBED_CONF_APP_NORDIC_NRF_LF_CLOCK_SRC == NRF_LF_SRC_XTAL
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#define CLOCK_LFCLKSRC_SRC_TO_USE (CLOCK_LFCLKSRC_SRC_Xtal)
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#elif MBED_CONF_APP_NORDIC_NRF_LF_CLOCK_SRC == NRF_LF_SRC_RC
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#define CLOCK_LFCLKSRC_SRC_TO_USE (CLOCK_LFCLKSRC_SRC_RC)
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#else
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#error Bad LFCLK configuration. Declare proper source through mbed configuration.
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#endif
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#undef NRF_LF_SRC_XTAL
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#undef NRF_LF_SRC_SYNTH
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#undef NRF_LF_SRC_RC
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#endif
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