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targets/hal/TARGET_Maxim/TARGET_MAX32610/rtc_api.c@510:d4fc7603a669, 2015-04-08 (annotated)

Committer:
mbed_official
Date:
Wed Apr 08 07:45:08 2015 +0100
Revision:
510:d4fc7603a669
Child:
540:c48d7048ab6e
Synchronized with git revision 158cbeb2927b64c560005dbec6f60463a468c9da



Full URL: https://github.com/mbedmicro/mbed/commit/158cbeb2927b64c560005dbec6f60463a468c9da/



USB - Add macros to alias the endpoint callback functions to support configurability

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 510:d4fc7603a669 1 /*******************************************************************************
mbed_official 510:d4fc7603a669 2 * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
mbed_official 510:d4fc7603a669 3 *
mbed_official 510:d4fc7603a669 4 * Permission is hereby granted, free of charge, to any person obtaining a
mbed_official 510:d4fc7603a669 5 * copy of this software and associated documentation files (the "Software"),
mbed_official 510:d4fc7603a669 6 * to deal in the Software without restriction, including without limitation
mbed_official 510:d4fc7603a669 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
mbed_official 510:d4fc7603a669 8 * and/or sell copies of the Software, and to permit persons to whom the
mbed_official 510:d4fc7603a669 9 * Software is furnished to do so, subject to the following conditions:
mbed_official 510:d4fc7603a669 10 *
mbed_official 510:d4fc7603a669 11 * The above copyright notice and this permission notice shall be included
mbed_official 510:d4fc7603a669 12 * in all copies or substantial portions of the Software.
mbed_official 510:d4fc7603a669 13 *
mbed_official 510:d4fc7603a669 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
mbed_official 510:d4fc7603a669 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
mbed_official 510:d4fc7603a669 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
mbed_official 510:d4fc7603a669 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
mbed_official 510:d4fc7603a669 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
mbed_official 510:d4fc7603a669 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
mbed_official 510:d4fc7603a669 20 * OTHER DEALINGS IN THE SOFTWARE.
mbed_official 510:d4fc7603a669 21 *
mbed_official 510:d4fc7603a669 22 * Except as contained in this notice, the name of Maxim Integrated
mbed_official 510:d4fc7603a669 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
mbed_official 510:d4fc7603a669 24 * Products, Inc. Branding Policy.
mbed_official 510:d4fc7603a669 25 *
mbed_official 510:d4fc7603a669 26 * The mere transfer of this software does not imply any licenses
mbed_official 510:d4fc7603a669 27 * of trade secrets, proprietary technology, copyrights, patents,
mbed_official 510:d4fc7603a669 28 * trademarks, maskwork rights, or any other form of intellectual
mbed_official 510:d4fc7603a669 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
mbed_official 510:d4fc7603a669 30 * ownership rights.
mbed_official 510:d4fc7603a669 31 *******************************************************************************
mbed_official 510:d4fc7603a669 32 */
mbed_official 510:d4fc7603a669 33
mbed_official 510:d4fc7603a669 34 #include "rtc_api.h"
mbed_official 510:d4fc7603a669 35 #include "cmsis.h"
mbed_official 510:d4fc7603a669 36 #include "rtc_regs.h"
mbed_official 510:d4fc7603a669 37 #include "pwrseq_regs.h"
mbed_official 510:d4fc7603a669 38 #include "clkman_regs.h"
mbed_official 510:d4fc7603a669 39
mbed_official 510:d4fc7603a669 40 static int rtc_inited = 0;
mbed_official 510:d4fc7603a669 41 static volatile uint32_t overflow_cnt = 0;
mbed_official 510:d4fc7603a669 42 static uint32_t overflow_alarm = 0;
mbed_official 510:d4fc7603a669 43
mbed_official 510:d4fc7603a669 44 //******************************************************************************
mbed_official 510:d4fc7603a669 45 static void overflow_handler(void)
mbed_official 510:d4fc7603a669 46 {
mbed_official 510:d4fc7603a669 47 MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_ASYNC_CLR_FLAGS;
mbed_official 510:d4fc7603a669 48 overflow_cnt++;
mbed_official 510:d4fc7603a669 49
mbed_official 510:d4fc7603a669 50 if (overflow_cnt == overflow_alarm) {
mbed_official 510:d4fc7603a669 51 // Enable the comparator interrupt for the alarm
mbed_official 510:d4fc7603a669 52 MXC_RTCTMR->inten |= MXC_F_RTC_INTEN_COMP0;
mbed_official 510:d4fc7603a669 53 }
mbed_official 510:d4fc7603a669 54 }
mbed_official 510:d4fc7603a669 55
mbed_official 510:d4fc7603a669 56 //******************************************************************************
mbed_official 510:d4fc7603a669 57 static void alarm_handler(void)
mbed_official 510:d4fc7603a669 58 {
mbed_official 510:d4fc7603a669 59 MXC_RTCTMR->inten &= ~MXC_F_RTC_INTEN_COMP0;
mbed_official 510:d4fc7603a669 60 MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_ASYNC_CLR_FLAGS;
mbed_official 510:d4fc7603a669 61 }
mbed_official 510:d4fc7603a669 62
mbed_official 510:d4fc7603a669 63 //******************************************************************************
mbed_official 510:d4fc7603a669 64 void rtc_init(void)
mbed_official 510:d4fc7603a669 65 {
mbed_official 510:d4fc7603a669 66 if(rtc_inited) {
mbed_official 510:d4fc7603a669 67 return;
mbed_official 510:d4fc7603a669 68 }
mbed_official 510:d4fc7603a669 69 rtc_inited = 1;
mbed_official 510:d4fc7603a669 70
mbed_official 510:d4fc7603a669 71 // Enable the clock to the synchronizer
mbed_official 510:d4fc7603a669 72 MXC_CLKMAN->clk_ctrl_13_rtc_int_sync = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
mbed_official 510:d4fc7603a669 73
mbed_official 510:d4fc7603a669 74 // Enable the clock to the RTC
mbed_official 510:d4fc7603a669 75 MXC_PWRSEQ->reg0 |= MXC_F_PWRSEQ_REG0_PWR_RTCEN_RUN;
mbed_official 510:d4fc7603a669 76
mbed_official 510:d4fc7603a669 77 // Set the divider from the 4kHz clock
mbed_official 510:d4fc7603a669 78 MXC_RTCTMR->prescale = MXC_E_RTC_PRESCALE_DIV_2_0;
mbed_official 510:d4fc7603a669 79
mbed_official 510:d4fc7603a669 80 // Enable the overflow interrupt
mbed_official 510:d4fc7603a669 81 MXC_RTCTMR->inten |= MXC_F_RTC_FLAGS_OVERFLOW;
mbed_official 510:d4fc7603a669 82
mbed_official 510:d4fc7603a669 83 // Prepare interrupt handlers
mbed_official 510:d4fc7603a669 84 NVIC_SetVector(RTC0_IRQn, (uint32_t)alarm_handler);
mbed_official 510:d4fc7603a669 85 NVIC_EnableIRQ(RTC0_IRQn);
mbed_official 510:d4fc7603a669 86 NVIC_SetVector(RTC3_IRQn, (uint32_t)overflow_handler);
mbed_official 510:d4fc7603a669 87 NVIC_EnableIRQ(RTC3_IRQn);
mbed_official 510:d4fc7603a669 88
mbed_official 510:d4fc7603a669 89 // Enable the RTC
mbed_official 510:d4fc7603a669 90 MXC_RTCTMR->ctrl |= MXC_F_RTC_CTRL_ENABLE;
mbed_official 510:d4fc7603a669 91 }
mbed_official 510:d4fc7603a669 92
mbed_official 510:d4fc7603a669 93 //******************************************************************************
mbed_official 510:d4fc7603a669 94 void rtc_free(void)
mbed_official 510:d4fc7603a669 95 {
mbed_official 510:d4fc7603a669 96 if (MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_ENABLE) {
mbed_official 510:d4fc7603a669 97 // Clear and disable RTC
mbed_official 510:d4fc7603a669 98 MXC_RTCTMR->ctrl |= MXC_F_RTC_CTRL_CLEAR;
mbed_official 510:d4fc7603a669 99 MXC_RTCTMR->ctrl &= ~MXC_F_RTC_CTRL_ENABLE;
mbed_official 510:d4fc7603a669 100
mbed_official 510:d4fc7603a669 101 // Wait for pending transactions
mbed_official 510:d4fc7603a669 102 while(MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_PENDING);
mbed_official 510:d4fc7603a669 103 }
mbed_official 510:d4fc7603a669 104
mbed_official 510:d4fc7603a669 105 // Disable the clock to the RTC
mbed_official 510:d4fc7603a669 106 MXC_PWRSEQ->reg0 &= ~(MXC_F_PWRSEQ_REG0_PWR_RTCEN_RUN | MXC_F_PWRSEQ_REG0_PWR_RTCEN_SLP);
mbed_official 510:d4fc7603a669 107
mbed_official 510:d4fc7603a669 108 // Disable the clock to the synchronizer
mbed_official 510:d4fc7603a669 109 MXC_CLKMAN->clk_ctrl_13_rtc_int_sync = MXC_E_CLKMAN_CLK_SCALE_DISABLED;
mbed_official 510:d4fc7603a669 110 }
mbed_official 510:d4fc7603a669 111
mbed_official 510:d4fc7603a669 112 //******************************************************************************
mbed_official 510:d4fc7603a669 113 int rtc_isenabled(void)
mbed_official 510:d4fc7603a669 114 {
mbed_official 510:d4fc7603a669 115 return (MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_ENABLE);
mbed_official 510:d4fc7603a669 116 }
mbed_official 510:d4fc7603a669 117
mbed_official 510:d4fc7603a669 118 //******************************************************************************
mbed_official 510:d4fc7603a669 119 time_t rtc_read(void)
mbed_official 510:d4fc7603a669 120 {
mbed_official 510:d4fc7603a669 121 unsigned int shift_amt;
mbed_official 510:d4fc7603a669 122 uint32_t ovf_cnt_1, ovf_cnt_2, timer_cnt;
mbed_official 510:d4fc7603a669 123
mbed_official 510:d4fc7603a669 124 // Account for a change in the default prescaler
mbed_official 510:d4fc7603a669 125 shift_amt = MXC_E_RTC_PRESCALE_DIV_2_12 - MXC_RTCTMR->prescale;
mbed_official 510:d4fc7603a669 126
mbed_official 510:d4fc7603a669 127 // Ensure coherency between overflow_cnt and timer
mbed_official 510:d4fc7603a669 128 do {
mbed_official 510:d4fc7603a669 129 ovf_cnt_1 = overflow_cnt;
mbed_official 510:d4fc7603a669 130 timer_cnt = MXC_RTCTMR->timer;
mbed_official 510:d4fc7603a669 131 ovf_cnt_2 = overflow_cnt;
mbed_official 510:d4fc7603a669 132 } while (ovf_cnt_1 != ovf_cnt_2);
mbed_official 510:d4fc7603a669 133
mbed_official 510:d4fc7603a669 134 return (timer_cnt >> shift_amt) + (ovf_cnt_1 << (32 - shift_amt));
mbed_official 510:d4fc7603a669 135 }
mbed_official 510:d4fc7603a669 136
mbed_official 510:d4fc7603a669 137 //******************************************************************************
mbed_official 510:d4fc7603a669 138 uint64_t rtc_read_us(void)
mbed_official 510:d4fc7603a669 139 {
mbed_official 510:d4fc7603a669 140 unsigned int shift_amt;
mbed_official 510:d4fc7603a669 141 uint32_t ovf_cnt_1, ovf_cnt_2, timer_cnt;
mbed_official 510:d4fc7603a669 142 uint64_t currentUs;
mbed_official 510:d4fc7603a669 143
mbed_official 510:d4fc7603a669 144 // Account for a change in the default prescaler
mbed_official 510:d4fc7603a669 145 shift_amt = MXC_E_RTC_PRESCALE_DIV_2_12 - MXC_RTCTMR->prescale;
mbed_official 510:d4fc7603a669 146
mbed_official 510:d4fc7603a669 147 // Ensure coherency between overflow_cnt and timer
mbed_official 510:d4fc7603a669 148 do {
mbed_official 510:d4fc7603a669 149 ovf_cnt_1 = overflow_cnt;
mbed_official 510:d4fc7603a669 150 timer_cnt = MXC_RTCTMR->timer;
mbed_official 510:d4fc7603a669 151 ovf_cnt_2 = overflow_cnt;
mbed_official 510:d4fc7603a669 152 } while (ovf_cnt_1 != ovf_cnt_2);
mbed_official 510:d4fc7603a669 153
mbed_official 510:d4fc7603a669 154 currentUs = (((uint64_t)timer_cnt * 1000000) >> shift_amt) + (((uint64_t)ovf_cnt_1 * 1000000) << (32 - shift_amt));
mbed_official 510:d4fc7603a669 155
mbed_official 510:d4fc7603a669 156 return currentUs;
mbed_official 510:d4fc7603a669 157 }
mbed_official 510:d4fc7603a669 158
mbed_official 510:d4fc7603a669 159 //******************************************************************************
mbed_official 510:d4fc7603a669 160 void rtc_write(time_t t)
mbed_official 510:d4fc7603a669 161 {
mbed_official 510:d4fc7603a669 162 // Account for a change in the default prescaler
mbed_official 510:d4fc7603a669 163 unsigned int shift_amt = MXC_E_RTC_PRESCALE_DIV_2_12 - MXC_RTCTMR->prescale;
mbed_official 510:d4fc7603a669 164
mbed_official 510:d4fc7603a669 165 MXC_RTCTMR->ctrl &= ~MXC_F_RTC_CTRL_ENABLE; // disable the timer while updating
mbed_official 510:d4fc7603a669 166 MXC_RTCTMR->timer = t << shift_amt;
mbed_official 510:d4fc7603a669 167 overflow_cnt = t >> (32 - shift_amt);
mbed_official 510:d4fc7603a669 168 MXC_RTCTMR->ctrl |= MXC_F_RTC_CTRL_ENABLE; // enable the timer while updating
mbed_official 510:d4fc7603a669 169 }
mbed_official 510:d4fc7603a669 170
mbed_official 510:d4fc7603a669 171 //******************************************************************************
mbed_official 510:d4fc7603a669 172 void rtc_set_wakeup(uint64_t wakeupUs)
mbed_official 510:d4fc7603a669 173 {
mbed_official 510:d4fc7603a669 174 // Account for a change in the default prescaler
mbed_official 510:d4fc7603a669 175 unsigned int shift_amt = MXC_E_RTC_PRESCALE_DIV_2_12 - MXC_RTCTMR->prescale;
mbed_official 510:d4fc7603a669 176
mbed_official 510:d4fc7603a669 177 // Disable the alarm while it is prepared
mbed_official 510:d4fc7603a669 178 MXC_RTCTMR->inten &= ~MXC_F_RTC_INTEN_COMP0;
mbed_official 510:d4fc7603a669 179 MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_COMP0; // clear interrupt
mbed_official 510:d4fc7603a669 180
mbed_official 510:d4fc7603a669 181 overflow_alarm = (wakeupUs >> (32 - shift_amt)) / 1000000;
mbed_official 510:d4fc7603a669 182
mbed_official 510:d4fc7603a669 183 if (overflow_alarm == overflow_cnt) {
mbed_official 510:d4fc7603a669 184 MXC_RTCTMR->comp[0] = (wakeupUs << shift_amt) / 1000000;
mbed_official 510:d4fc7603a669 185 MXC_RTCTMR->inten |= MXC_F_RTC_INTEN_COMP0;
mbed_official 510:d4fc7603a669 186 }
mbed_official 510:d4fc7603a669 187
mbed_official 510:d4fc7603a669 188 // Enable wakeup from RTC
mbed_official 510:d4fc7603a669 189 MXC_PWRSEQ->msk_flags &= ~(MXC_F_PWRSEQ_MSK_FLAGS_RTC_ROLLOVER | MXC_F_PWRSEQ_MSK_FLAGS_RTC_CMPR0);
mbed_official 510:d4fc7603a669 190 }