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mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_Maxim/TARGET_MAX32610/sleep.c@507:d4fc7603a669, 2015-04-08 (annotated)

Committer:
mbed_official
Date:
Wed Apr 08 07:45:08 2015 +0100
Revision:
507:d4fc7603a669
Child:
536: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 507:d4fc7603a669 1 /*******************************************************************************
mbed_official 507:d4fc7603a669 2 * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
mbed_official 507:d4fc7603a669 3 *
mbed_official 507:d4fc7603a669 4 * Permission is hereby granted, free of charge, to any person obtaining a
mbed_official 507:d4fc7603a669 5 * copy of this software and associated documentation files (the "Software"),
mbed_official 507:d4fc7603a669 6 * to deal in the Software without restriction, including without limitation
mbed_official 507:d4fc7603a669 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
mbed_official 507:d4fc7603a669 8 * and/or sell copies of the Software, and to permit persons to whom the
mbed_official 507:d4fc7603a669 9 * Software is furnished to do so, subject to the following conditions:
mbed_official 507:d4fc7603a669 10 *
mbed_official 507:d4fc7603a669 11 * The above copyright notice and this permission notice shall be included
mbed_official 507:d4fc7603a669 12 * in all copies or substantial portions of the Software.
mbed_official 507:d4fc7603a669 13 *
mbed_official 507:d4fc7603a669 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
mbed_official 507:d4fc7603a669 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
mbed_official 507:d4fc7603a669 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
mbed_official 507:d4fc7603a669 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
mbed_official 507:d4fc7603a669 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
mbed_official 507:d4fc7603a669 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
mbed_official 507:d4fc7603a669 20 * OTHER DEALINGS IN THE SOFTWARE.
mbed_official 507:d4fc7603a669 21 *
mbed_official 507:d4fc7603a669 22 * Except as contained in this notice, the name of Maxim Integrated
mbed_official 507:d4fc7603a669 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
mbed_official 507:d4fc7603a669 24 * Products, Inc. Branding Policy.
mbed_official 507:d4fc7603a669 25 *
mbed_official 507:d4fc7603a669 26 * The mere transfer of this software does not imply any licenses
mbed_official 507:d4fc7603a669 27 * of trade secrets, proprietary technology, copyrights, patents,
mbed_official 507:d4fc7603a669 28 * trademarks, maskwork rights, or any other form of intellectual
mbed_official 507:d4fc7603a669 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
mbed_official 507:d4fc7603a669 30 * ownership rights.
mbed_official 507:d4fc7603a669 31 *******************************************************************************
mbed_official 507:d4fc7603a669 32 */
mbed_official 507:d4fc7603a669 33
mbed_official 507:d4fc7603a669 34 #include "sleep_api.h"
mbed_official 507:d4fc7603a669 35 #include "us_ticker_api.h"
mbed_official 507:d4fc7603a669 36 #include "cmsis.h"
mbed_official 507:d4fc7603a669 37 #include "pwrman_regs.h"
mbed_official 507:d4fc7603a669 38 #include "pwrseq_regs.h"
mbed_official 507:d4fc7603a669 39 #include "ioman_regs.h"
mbed_official 507:d4fc7603a669 40 #include "rtc_regs.h"
mbed_official 507:d4fc7603a669 41
mbed_official 507:d4fc7603a669 42 #define MIN_DEEP_SLEEP_US 500
mbed_official 507:d4fc7603a669 43
mbed_official 507:d4fc7603a669 44 uint64_t rtc_read_us(void);
mbed_official 507:d4fc7603a669 45 void rtc_set_wakeup(uint64_t wakeupUs);
mbed_official 507:d4fc7603a669 46 void us_ticker_deinit(void);
mbed_official 507:d4fc7603a669 47 void us_ticker_set(timestamp_t timestamp);
mbed_official 507:d4fc7603a669 48
mbed_official 507:d4fc7603a669 49 static mxc_uart_regs_t *stdio_uart = (mxc_uart_regs_t*)STDIO_UART;
mbed_official 507:d4fc7603a669 50
mbed_official 507:d4fc7603a669 51 // Normal wait mode
mbed_official 507:d4fc7603a669 52 void sleep(void)
mbed_official 507:d4fc7603a669 53 {
mbed_official 507:d4fc7603a669 54 // Normal sleep mode for ARM core
mbed_official 507:d4fc7603a669 55 SCB->SCR = 0;
mbed_official 507:d4fc7603a669 56
mbed_official 507:d4fc7603a669 57 __DSB();
mbed_official 507:d4fc7603a669 58 __WFI();
mbed_official 507:d4fc7603a669 59 }
mbed_official 507:d4fc7603a669 60
mbed_official 507:d4fc7603a669 61 // Work-around for issue of clearing power sequencer I/O flag
mbed_official 507:d4fc7603a669 62 static void clearAllGPIOWUD(void)
mbed_official 507:d4fc7603a669 63 {
mbed_official 507:d4fc7603a669 64 uint32_t wud_req0 = MXC_IOMAN->wud_req0;
mbed_official 507:d4fc7603a669 65 uint32_t wud_req1 = MXC_IOMAN->wud_req1;
mbed_official 507:d4fc7603a669 66
mbed_official 507:d4fc7603a669 67 // I/O must be a wakeup detect to clear
mbed_official 507:d4fc7603a669 68 MXC_IOMAN->wud_req0 = 0xffffffff;
mbed_official 507:d4fc7603a669 69 MXC_IOMAN->wud_req1 = 0xffffffff;
mbed_official 507:d4fc7603a669 70
mbed_official 507:d4fc7603a669 71 // Clear all WUDs
mbed_official 507:d4fc7603a669 72 MXC_PWRMAN->wud_ctrl = (MXC_E_PWRMAN_PAD_MODE_CLEAR_SET << MXC_F_PWRMAN_WUD_CTRL_PAD_MODE_POS) | MXC_F_PWRMAN_WUD_CTRL_CLEAR_ALL;
mbed_official 507:d4fc7603a669 73 MXC_PWRMAN->wud_pulse0 = 1;
mbed_official 507:d4fc7603a669 74
mbed_official 507:d4fc7603a669 75 // Restore WUD requests
mbed_official 507:d4fc7603a669 76 MXC_IOMAN->wud_req0 = wud_req0;
mbed_official 507:d4fc7603a669 77 MXC_IOMAN->wud_req1 = wud_req1;
mbed_official 507:d4fc7603a669 78 }
mbed_official 507:d4fc7603a669 79
mbed_official 507:d4fc7603a669 80 // Low-power stop mode
mbed_official 507:d4fc7603a669 81 void deepsleep(void)
mbed_official 507:d4fc7603a669 82 {
mbed_official 507:d4fc7603a669 83 uint64_t sleepStartRtcUs;
mbed_official 507:d4fc7603a669 84 uint32_t sleepStartTickerUs;
mbed_official 507:d4fc7603a669 85 int32_t sleepDurationUs;
mbed_official 507:d4fc7603a669 86 uint64_t sleepEndRtcUs;
mbed_official 507:d4fc7603a669 87 uint64_t elapsedUs;
mbed_official 507:d4fc7603a669 88
mbed_official 507:d4fc7603a669 89 __disable_irq();
mbed_official 507:d4fc7603a669 90
mbed_official 507:d4fc7603a669 91 // Wait for all STDIO characters to be sent. The UART clock will stop.
mbed_official 507:d4fc7603a669 92 while (stdio_uart->status & MXC_F_UART_STATUS_TX_BUSY);
mbed_official 507:d4fc7603a669 93
mbed_official 507:d4fc7603a669 94 // Record the current times
mbed_official 507:d4fc7603a669 95 sleepStartRtcUs = rtc_read_us();
mbed_official 507:d4fc7603a669 96 sleepStartTickerUs = us_ticker_read();
mbed_official 507:d4fc7603a669 97
mbed_official 507:d4fc7603a669 98 // Get the next mbed timer expiration
mbed_official 507:d4fc7603a669 99 timestamp_t next_event = 0;
mbed_official 507:d4fc7603a669 100 us_ticker_get_next_timestamp(&next_event);
mbed_official 507:d4fc7603a669 101 sleepDurationUs = next_event - sleepStartTickerUs;
mbed_official 507:d4fc7603a669 102
mbed_official 507:d4fc7603a669 103 if (sleepDurationUs < MIN_DEEP_SLEEP_US) {
mbed_official 507:d4fc7603a669 104 /* The next wakeup is too soon. */
mbed_official 507:d4fc7603a669 105 __enable_irq();
mbed_official 507:d4fc7603a669 106 return;
mbed_official 507:d4fc7603a669 107 }
mbed_official 507:d4fc7603a669 108
mbed_official 507:d4fc7603a669 109 // Disable the us_ticker. It won't be clocked in DeepSleep
mbed_official 507:d4fc7603a669 110 us_ticker_deinit();
mbed_official 507:d4fc7603a669 111
mbed_official 507:d4fc7603a669 112 // Prepare to wakeup from the RTC
mbed_official 507:d4fc7603a669 113 rtc_set_wakeup(sleepStartRtcUs + sleepDurationUs);
mbed_official 507:d4fc7603a669 114
mbed_official 507:d4fc7603a669 115 // Prepare for LP1
mbed_official 507:d4fc7603a669 116 uint32_t reg0 = MXC_PWRSEQ->reg0;
mbed_official 507:d4fc7603a669 117 reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_SVM3EN_SLP; // disable VDD3 SVM during sleep mode
mbed_official 507:d4fc7603a669 118 reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_SVM1EN_SLP; // disable VREG18 SVM during sleep mode
mbed_official 507:d4fc7603a669 119 if (reg0 & MXC_F_PWRSEQ_REG0_PWR_RTCEN_RUN) { // if real-time clock enabled during run
mbed_official 507:d4fc7603a669 120 reg0 |= MXC_F_PWRSEQ_REG0_PWR_RTCEN_SLP; // enable real-time clock during sleep mode
mbed_official 507:d4fc7603a669 121 } else {
mbed_official 507:d4fc7603a669 122 reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_RTCEN_SLP; // disable real-time clock during sleep mode
mbed_official 507:d4fc7603a669 123 }
mbed_official 507:d4fc7603a669 124 reg0 |= MXC_F_PWRSEQ_REG0_PWR_CHZYEN_SLP; // enable CHZY regulator during sleep mode
mbed_official 507:d4fc7603a669 125 reg0 |= MXC_F_PWRSEQ_REG0_PWR_LP1; // go into LP1
mbed_official 507:d4fc7603a669 126 reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_FIRST_BOOT; // clear first boot flag
mbed_official 507:d4fc7603a669 127 MXC_PWRSEQ->reg0 = reg0;
mbed_official 507:d4fc7603a669 128
mbed_official 507:d4fc7603a669 129 MXC_PWRSEQ->reg3 = (MXC_PWRSEQ->reg3 & ~MXC_F_PWRSEQ_REG3_PWR_ROSEL_QUICK) | (3 << MXC_F_PWRSEQ_REG3_PWR_ROSEL_QUICK_POS);
mbed_official 507:d4fc7603a669 130
mbed_official 507:d4fc7603a669 131 // Deep sleep for ARM core
mbed_official 507:d4fc7603a669 132 SCB->SCR = SCB_SCR_SLEEPDEEP_Msk;
mbed_official 507:d4fc7603a669 133
mbed_official 507:d4fc7603a669 134 // clear latches for wakeup detect
mbed_official 507:d4fc7603a669 135 MXC_PWRSEQ->flags = MXC_PWRSEQ->flags;
mbed_official 507:d4fc7603a669 136 if (MXC_PWRSEQ->flags & MXC_F_PWRSEQ_FLAGS_PWR_IO_WAKEUP) {
mbed_official 507:d4fc7603a669 137 // attempt work-around for I/O flag clearing issue
mbed_official 507:d4fc7603a669 138 clearAllGPIOWUD();
mbed_official 507:d4fc7603a669 139 MXC_PWRSEQ->flags = MXC_F_PWRSEQ_FLAGS_PWR_IO_WAKEUP;
mbed_official 507:d4fc7603a669 140 }
mbed_official 507:d4fc7603a669 141
mbed_official 507:d4fc7603a669 142 // Wait for pending RTC transaction
mbed_official 507:d4fc7603a669 143 while (MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_PENDING);
mbed_official 507:d4fc7603a669 144
mbed_official 507:d4fc7603a669 145 // Ensure that the event register is clear
mbed_official 507:d4fc7603a669 146 __SEV(); // set event
mbed_official 507:d4fc7603a669 147 __WFE(); // clear event
mbed_official 507:d4fc7603a669 148
mbed_official 507:d4fc7603a669 149 // Enter LP1
mbed_official 507:d4fc7603a669 150 __WFE();
mbed_official 507:d4fc7603a669 151 // Woke up from LP1
mbed_official 507:d4fc7603a669 152
mbed_official 507:d4fc7603a669 153 // The RTC timer does not update until the next tick
mbed_official 507:d4fc7603a669 154 uint64_t tempUs = rtc_read_us();
mbed_official 507:d4fc7603a669 155 do {
mbed_official 507:d4fc7603a669 156 sleepEndRtcUs = rtc_read_us();
mbed_official 507:d4fc7603a669 157 } while(sleepEndRtcUs == tempUs);
mbed_official 507:d4fc7603a669 158
mbed_official 507:d4fc7603a669 159 // Get the elapsed time from the RTC. Wakeup could have been from some other event.
mbed_official 507:d4fc7603a669 160 elapsedUs = sleepEndRtcUs - sleepStartRtcUs;
mbed_official 507:d4fc7603a669 161
mbed_official 507:d4fc7603a669 162 // Update the us_ticker. It was not clocked during DeepSleep
mbed_official 507:d4fc7603a669 163 us_ticker_init();
mbed_official 507:d4fc7603a669 164 us_ticker_set(sleepStartTickerUs + elapsedUs);
mbed_official 507:d4fc7603a669 165 us_ticker_get_next_timestamp(&next_event);
mbed_official 507:d4fc7603a669 166 us_ticker_set_interrupt(next_event);
mbed_official 507:d4fc7603a669 167
mbed_official 507:d4fc7603a669 168 __enable_irq();
mbed_official 507:d4fc7603a669 169 }