mirror of https://github.com/ARMmbed/mbed-os.git
- Added code to clear temporary variable on the stack before exiting the
trng_get_bytes; - Removed lp ticker as it does not satisfy the requirements of the lp timer.pull/5144/head
Wu
parent
de2b5264e2
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2eff4c7569
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@ -1,259 +0,0 @@
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/*******************************************************************************
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* Copyright (c) 2010-2017 Analog Devices, Inc.
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*
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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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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Modified versions of the software must be conspicuously marked as such.
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* - This software is licensed solely and exclusively for use with processors
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* manufactured by or for Analog Devices, Inc.
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* - This software may not be combined or merged with other code in any manner
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* that would cause the software to become subject to terms and conditions
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* which differ from those listed here.
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* - Neither the name of Analog Devices, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* - The use of this software may or may not infringe the patent rights of one
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* or more patent holders. This license does not release you from the
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* requirement that you obtain separate licenses from these patent holders
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* to use this software.
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*
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* THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES, INC. AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-
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* INFRINGEMENT, TITLE, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES, INC. OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, DAMAGES ARISING OUT OF
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* CLAIMS OF INTELLECTUAL PROPERTY RIGHTS INFRINGEMENT; PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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******************************************************************************/
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#include <sys/platform.h>
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#include "lp_ticker_api.h"
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#include <drivers/rtc/adi_rtc.h>
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#include <drivers/pwr/adi_pwr.h>
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#include "adi_rtc_def.h"
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#ifdef DEVICE_LOWPOWERTIMER
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// define base LF clock frequncy in Hz
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#define LFCLK_FREQUENCY_HZ 32768
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// RTC prescaler for the LF clock
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#define RTC_PRESCALER 0
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/* time for each tick of the LF clock in us */
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#define TIME_US_PER_TICK ((float)1000000/(float)(LFCLK_FREQUENCY_HZ>>RTC_PRESCALER))
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// The number of RTC clock ticks it takes to set & enable the alarm
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#define TICKS_TO_ENABLE_ALARM 10
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// Mask to limit the value of the RTC value to 27 bits so the converted time in us fits
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// in 32-bits
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#define MAX_TICK_MASK ((1 << 27) - 1)
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static unsigned char rtc1_memory[ADI_RTC_MEMORY_SIZE];
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static ADI_RTC_HANDLE hRTC1_Device;
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/**
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* \defgroup hal_LpTicker Low Power Ticker Functions
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* @{
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*/
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/**
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* Local stream-lined alarm setting function.
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*
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*/
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static int set_rtc_alarm_interrupt(ADI_RTC_HANDLE const hDevice, uint32_t nAlarm)
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{
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ADI_RTC_DEVICE *pDevice = hDevice;
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uint16_t cr0;
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ADI_INT_STATUS_ALLOC();
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// Section to enable interrupts
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// The interrupt used is ADI_RTC_ALARM_INT
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// Set the Alarm interrupt enable and Alarm enable bits in cr0
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cr0 = BITM_RTC_CR0_ALMEN | (1u << BITP_RTC_CR0_ALMINTEN);
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// Set the alarm value
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/* Wait till previously posted write to Alram Register to complete */
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PEND_BEFORE_WRITE(SR1,(BITM_RTC_SR1_WPNDALM0|BITM_RTC_SR1_WPNDALM1))
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ADI_ENTER_CRITICAL_REGION();
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/* Program the alarm count registers. */
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pDevice->pRTCRegs->ALM0 = (uint16_t)nAlarm;
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pDevice->pRTCRegs->ALM1 = (uint16_t)(nAlarm >> 16);
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pDevice->pRTCRegs->ALM2 = 0u;
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ADI_EXIT_CRITICAL_REGION();
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/* Wait till write to Control Register to take effect */
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SYNC_AFTER_WRITE(SR0,(BITM_RTC_SR0_WSYNCALM0|BITM_RTC_SR0_WSYNCALM1))
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// Enable alarm
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/* Wait till previously posted write to Control Register to complete */
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PEND_BEFORE_WRITE(SR1,BITM_RTC_SR1_WPNDALM1|BITM_RTC_SR1_WPNDALM0)
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ADI_ENTER_CRITICAL_REGION();
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/* set RTC alarm and interrupt enable */
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pDevice->pRTCRegs->CR0 |= cr0;
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ADI_EXIT_CRITICAL_REGION();
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/* Wait till write to Control Register to take effect */
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SYNC_AFTER_WRITE(SR0,BITM_RTC_SR0_WSYNCCR0)
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return ADI_RTC_SUCCESS;
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}
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/**
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* Local RTC 1 ISR callback function.
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*
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*/
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static void rtc1_Callback(void *pCBParam, uint32_t nEvent, void *EventArg)
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{
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/* process RTC interrupts (cleared by driver) */
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if (ADI_RTC_ALARM_INT & nEvent) {
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lp_ticker_irq_handler();
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}
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}
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/* HAL lp ticker */
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/** Initialize the low power ticker
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*
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*/
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void lp_ticker_init()
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{
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// open the rtc device
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adi_rtc_Open(1, rtc1_memory, ADI_RTC_MEMORY_SIZE, &hRTC1_Device);
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// set the prescaler value
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adi_rtc_SetPreScale(hRTC1_Device, RTC_PRESCALER);
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// register call back for events
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adi_rtc_RegisterCallback(hRTC1_Device, rtc1_Callback, hRTC1_Device);
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// reset the RTC counter
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adi_rtc_SetCount(hRTC1_Device, 0);
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// set the trim value
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adi_rtc_SetTrim(hRTC1_Device, ADI_RTC_TRIM_INTERVAL_14, ADI_RTC_TRIM_1, ADI_RTC_TRIM_SUB);
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adi_rtc_EnableTrim(hRTC1_Device, true);
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// enable the RTC
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adi_rtc_Enable(hRTC1_Device, true);
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}
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/** Read the current counter
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*
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* @return The current timer's counter value in microseconds
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*/
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uint32_t lp_ticker_read()
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{
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uint32_t count;
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float t;
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// get current count
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adi_rtc_GetCount(hRTC1_Device, &count);
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// Throw away top 5 bits to avoid overflow and convert ticks to us
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count &= MAX_TICK_MASK;
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t = (float)count * TIME_US_PER_TICK;
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return (uint32_t)t;
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}
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/** Set interrupt for specified timestamp
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*
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* @param timestamp The time in microseconds to be set
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*/
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void lp_ticker_set_interrupt(timestamp_t timestamp)
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{
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uint32_t rtcCount, trunc_rtcCount, set_tick, tick_delta, alarm_tick;
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// compute the tick value based on the given alarm time
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set_tick = (uint32_t)((float)(timestamp) / TIME_US_PER_TICK);
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// get current count
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adi_rtc_GetCount(hRTC1_Device, &rtcCount);
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// compute the number of ticks required for the alarm
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trunc_rtcCount = rtcCount & MAX_TICK_MASK;
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// if set_tick is less than the current RTC count, the counter has
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// missed the desired time, so set tick_delta to 0
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if (set_tick >= trunc_rtcCount) {
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tick_delta = set_tick - trunc_rtcCount;
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} else {
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tick_delta = 0;
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}
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// compute the absolute RTC alarm count required
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alarm_tick = rtcCount + tick_delta;
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// check if the desired alarm duration is less than TICKS_TO_ENABLE_ALARM,
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// if so just wait it out rather than setting the alarm
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if (tick_delta <= TICKS_TO_ENABLE_ALARM) {
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// otherwise if the alarm time is less than the current RTC count + the time
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// it takes to enable the alarm, just wait until the desired number of counts
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// has expired rather than using the interrupt, then call the user ISR directly.
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do {
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adi_rtc_GetCount(hRTC1_Device, &rtcCount);
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} while (rtcCount < alarm_tick);
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rtc1_Callback(NULL, ADI_RTC_ALARM_INT, NULL);
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return;
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}
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// set the alarm otherwise
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set_rtc_alarm_interrupt(hRTC1_Device, alarm_tick);
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}
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/** Disable low power ticker interrupt
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*
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*/
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void lp_ticker_disable_interrupt()
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{
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adi_rtc_EnableInterrupts(hRTC1_Device, ADI_RTC_ALARM_INT, false);
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}
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/** Clear the low power ticker interrupt
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*
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*/
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void lp_ticker_clear_interrupt()
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{
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ADI_RTC_DEVICE *pDevice = hRTC1_Device;
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NVIC_ClearPendingIRQ(pDevice->eIRQn);
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return;
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}
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/** Set pending interrupt that should be fired right away.
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*
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* The ticker should be initialized prior calling this function.
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*/
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void lp_ticker_fire_interrupt(void)
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{
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ADI_RTC_DEVICE *pDevice = hRTC1_Device;
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NVIC_SetPendingIRQ(pDevice->eIRQn);
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}
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#endif
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/**@}*/
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@ -110,6 +110,9 @@ int trng_get_bytes(trng_t *obj, uint8_t *output, size_t length, size_t *output_l
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// Save the output
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// Save the output
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output[i] = (uint8_t)(nRandomNum & 0xFF);
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output[i] = (uint8_t)(nRandomNum & 0xFF);
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// Clear the nRandomNum variable for security purposes
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nRandomNum = 0;
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}
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}
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*output_length = length;
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*output_length = length;
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@ -618,7 +618,7 @@
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"supported_toolchains": ["ARM", "GCC_ARM", "IAR"],
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"supported_toolchains": ["ARM", "GCC_ARM", "IAR"],
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"macros": ["__ADUCM4050__", "EV_COG_AD4050LZ"],
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"macros": ["__ADUCM4050__", "EV_COG_AD4050LZ"],
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"extra_labels": ["Analog_Devices", "ADUCM4X50", "ADUCM4050", "EV_COG_AD4050LZ", "FLASH_CMSIS_ALGO"],
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"extra_labels": ["Analog_Devices", "ADUCM4X50", "ADUCM4050", "EV_COG_AD4050LZ", "FLASH_CMSIS_ALGO"],
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"device_has": ["SERIAL", "STDIO_MESSAGES", "TRNG", "SLEEP", "INTERRUPTIN", "LOWPOWERTIMER", "RTC", "SPI", "I2C", "FLASH", "ANALOGIN"],
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"device_has": ["SERIAL", "STDIO_MESSAGES", "TRNG", "SLEEP", "INTERRUPTIN", "RTC", "SPI", "I2C", "FLASH", "ANALOGIN"],
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"device_name": "ADuCM4050",
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"device_name": "ADuCM4050",
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"detect_code": ["0603"],
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"detect_code": ["0603"],
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"release_versions": ["5"]
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"release_versions": ["5"]
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