/******************************************************************************* * Copyright (C) 2022 Maxim Integrated Products, Inc., All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name of Maxim Integrated * Products, Inc. shall not be used except as stated in the Maxim Integrated * Products, Inc. Branding Policy. * * The mere transfer of this software does not imply any licenses * of trade secrets, proprietary technology, copyrights, patents, * trademarks, maskwork rights, or any other form of intellectual * property whatsoever. Maxim Integrated Products, Inc. retains all * ownership rights. ******************************************************************************* */ #if DEVICE_LPTICKER #include <stdio.h> #include <string.h> #include "rtc_api.h" #include "lp_ticker_api.h" #include "rtc.h" #include "lp.h" #include "mxc_sys.h" #if 0 #define LP_TIMER_RATE_HZ 4096 #define LP_TIMER_WIDTH 32 /* Converts a time in milleseconds to the equivalent RSSA register value. */ #define MSEC_TO_RSSA(x) (0 - ((x * 4096) / 1000)) static uint32_t g_nb_irq_tick = 0; //****************************************************************************** void lp_ticker_init(void) { MXC_GCR->clk_ctrl |= MXC_F_GCR_CLK_CTRL_X32K_EN; while(MXC_RTC_DisableInt(MXC_RTC_INT_EN_SHORT) == E_BUSY) { ; } NVIC_SetVector(RTC_IRQn, (uint32_t)lp_ticker_irq_handler); NVIC_EnableIRQ(RTC_IRQn); while(MXC_RTC_Start() == E_BUSY) { ; } MXC_LP_EnableRTCAlarmWakeup(); MXC_RTC->rssa = 0; } //****************************************************************************** void lp_ticker_free(void) { while(MXC_RTC_DisableInt(MXC_RTC_INT_EN_SHORT) == E_BUSY) { ; } } //****************************************************************************** uint32_t lp_ticker_read(void) { uint32_t tick; tick = g_nb_irq_tick + g_nb_irq_tick - (0-MXC_RTC->rssa); return tick; } //****************************************************************************** void lp_ticker_set_interrupt(timestamp_t timestamp) { while(MXC_RTC_DisableInt(MXC_RTC_INT_EN_SHORT) == E_BUSY) { ; } g_nb_irq_tick = timestamp ? timestamp : 1; while(MXC_RTC_SetSubsecondAlarm(0-g_nb_irq_tick) == E_BUSY) { ; } while(MXC_RTC_EnableInt(MXC_RTC_INT_EN_SHORT) == E_BUSY) { ; } while(MXC_RTC_Start() == E_BUSY) { ; } } //****************************************************************************** void lp_ticker_disable_interrupt(void) { while(MXC_RTC_DisableInt(MXC_RTC_INT_EN_SHORT) == E_BUSY) { ; } NVIC_DisableIRQ(RTC_IRQn); } //****************************************************************************** void lp_ticker_clear_interrupt(void) { MXC_RTC->ctrl &= ~(MXC_F_RTC_CTRL_ALSF); MXC_RTC->ctrl &= ~(MXC_F_RTC_CTRL_ALDF); } //****************************************************************************** void lp_ticker_fire_interrupt(void) { MXC_RTC->ctrl |= MXC_F_RTC_CTRL_ALSF; NVIC_SetPendingIRQ(RTC_IRQn); } //****************************************************************************** const ticker_info_t *lp_ticker_get_info(void) { static const ticker_info_t info = { LP_TIMER_RATE_HZ, LP_TIMER_WIDTH }; return &info; } #else #include "tmr.h" #if MBED_CONF_TARGET_LP_TICKER_TIMER == 0 #define LP_TIMER MXC_TMR4 #define LP_TIMER_IRQn TMR4_IRQn #elif MBED_CONF_TARGET_LP_TICKER_TIMER == 1 #define LP_TIMER MXC_TMR5 #define LP_TIMER_IRQn TMR5_IRQn #else #error "Invalid low power timer selected" #endif #define LP_TIMER_PRESCALE TMR_PRES_8 #define LP_TIMER_FREQ (ERTCO_FREQ >> 3) #define LP_TIMER_WIDTH 32 //****************************************************************************** void lp_ticker_init(void) { mxc_tmr_cfg_t cfg; unsigned int count; cfg.pres = LP_TIMER_PRESCALE; cfg.mode = TMR_MODE_COMPARE; cfg.bitMode = TMR_BIT_MODE_32; cfg.clock = MXC_TMR_32K_CLK; cfg.cmp_cnt = 0;//MXC_TMR_GetCompare(LP_TIMER); cfg.pol = 0; // Disable and deconfigure MXC_TMR_Shutdown(LP_TIMER); MXC_TMR_ClearFlags(LP_TIMER); count = MXC_TMR_GetCount(LP_TIMER); // Configure and enable MXC_TMR_Init(LP_TIMER, &cfg, 0); MXC_TMR_EnableWakeup(LP_TIMER, &cfg); MXC_TMR_SetCount(LP_TIMER, count); // Enable interrupts MXC_TMR_EnableInt(LP_TIMER); NVIC_SetVector(LP_TIMER_IRQn, (uint32_t)lp_ticker_irq_handler); NVIC_EnableIRQ(LP_TIMER_IRQn); #if MBED_CONF_TARGET_LP_TICKER_TIMER == 0 MXC_GCR->pm |= MXC_F_GCR_PM_LPTMR0_WE; #elif MBED_CONF_TARGET_LP_TICKER_TIMER == 1 MXC_GCR->pm |= MXC_F_GCR_PM_LPTMR1_WE; #endif MXC_PWRSEQ->lpcn |= MXC_F_PWRSEQ_LPCN_ERTCO_EN; MXC_LP_EnableTimerWakeup(LP_TIMER); MXC_TMR_Start(LP_TIMER); } //****************************************************************************** void lp_ticker_free(void) { MXC_TMR_Shutdown(LP_TIMER); } //****************************************************************************** uint32_t lp_ticker_read(void) { uint32_t cnt; // read cnt register twice cnt = LP_TIMER->cnt; cnt = LP_TIMER->cnt; //cnt = MXC_TMR_GetCount(LP_TIMER); return cnt; } //****************************************************************************** void lp_ticker_set_interrupt(timestamp_t timestamp) { //MXC_TMR_SetCompare(LP_TIMER, (timestamp) ? timestamp : 1); LP_TIMER->cmp = timestamp ? timestamp : 1; } //****************************************************************************** void lp_ticker_disable_interrupt(void) { NVIC_DisableIRQ(LP_TIMER_IRQn); } //****************************************************************************** void lp_ticker_clear_interrupt(void) { MXC_TMR_ClearFlags(LP_TIMER); } //****************************************************************************** void lp_ticker_fire_interrupt(void) { NVIC_SetPendingIRQ(LP_TIMER_IRQn); } //****************************************************************************** const ticker_info_t *lp_ticker_get_info(void) { static const ticker_info_t info = { LP_TIMER_FREQ, LP_TIMER_WIDTH }; return &info; } #endif #endif // DEVICE_LPTICKER