110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/* lpc_18xx_port.c
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*
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* Copyright (C) 2006-2023 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#include "board.h"
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#include "otp_18xx_43xx.h" /* For RNG */
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#include "timer_18xx_43xx.h"
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static uint32_t mTimeInit = 0;
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#define TIMER_SCALER 1000000
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static void init_time(void)
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{
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if(mTimeInit == 0) {
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uint32_t timerFreq;
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/* Set current time for RTC 2:00:00PM, 2012-10-05 */
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RTC_TIME_T FullTime;
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Chip_RTC_Init(LPC_RTC);
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FullTime.time[RTC_TIMETYPE_SECOND] = 0;
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FullTime.time[RTC_TIMETYPE_MINUTE] = 0;
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FullTime.time[RTC_TIMETYPE_HOUR] = 14;
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FullTime.time[RTC_TIMETYPE_DAYOFMONTH] = 5;
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FullTime.time[RTC_TIMETYPE_DAYOFWEEK] = 5;
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FullTime.time[RTC_TIMETYPE_DAYOFYEAR] = 279;
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FullTime.time[RTC_TIMETYPE_MONTH] = 10;
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FullTime.time[RTC_TIMETYPE_YEAR] = 2012;
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Chip_RTC_SetFullTime(LPC_RTC, &FullTime);
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/* Enable RTC (starts increase the tick counter and second counter register) */
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Chip_RTC_Enable(LPC_RTC, ENABLE);
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/* Enable timer 1 clock and reset it */
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Chip_TIMER_Init(LPC_TIMER2);
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Chip_RGU_TriggerReset(RGU_TIMER2_RST);
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while (Chip_RGU_InReset(RGU_TIMER2_RST)) {}
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/* Get timer peripheral clock rate */
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timerFreq = Chip_Clock_GetRate(CLK_MX_TIMER2);
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/* Timer setup */
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Chip_TIMER_Reset(LPC_TIMER2);
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Chip_TIMER_PrescaleSet(LPC_TIMER2, timerFreq/TIMER_SCALER);
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Chip_TIMER_Enable(LPC_TIMER2);
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mTimeInit = 1;
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}
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}
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double current_time()
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{
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//RTC_TIME_T FullTime;
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uint32_t timerMs;
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init_time();
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timerMs = Chip_TIMER_ReadCount(LPC_TIMER2);
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//Chip_RTC_GetFullTime(LPC_RTC, &FullTime);
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//(double)FullTime.time[RTC_TIMETYPE_SECOND]
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return (double)timerMs/TIMER_SCALER;
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}
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/* Memory location of the generated random numbers (for total of 128 bits) */
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static volatile uint32_t* mRandData = (uint32_t*)0x40045050;
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static uint32_t mRandInit = 0;
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static uint32_t mRandIndex = 0;
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uint32_t rand_gen(void)
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{
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uint32_t rand = 0;
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uint32_t status = LPC_OK;
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if(mRandIndex == 0) {
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if(mRandInit == 0) {
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Chip_OTP_Init();
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mRandInit = 1;
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}
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status = Chip_OTP_GenRand();
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}
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if(status == LPC_OK) {
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rand = mRandData[mRandIndex];
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}
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else {
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printf("GenRand Failed 0x%x\n", status);
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}
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if(++mRandIndex > 4) {
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mRandIndex = 0;
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}
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return rand;
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}
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