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Last commit 20 Feb 2019 by 
mbed official
targets/hal/TARGET_Maxim/TARGET_MAX32600/sleep.c@621:9c82b0f79f3d, 2015-09-11 (annotated)
- Committer:
- mbed_official
- Date:
- Fri Sep 11 09:30:09 2015 +0100
- Revision:
- 621:9c82b0f79f3d
- Parent:
- 536:c48d7048ab6e
Synchronized with git revision 6c1d63e069ab9bd86de92e8296ca783681257538
Full URL: https://github.com/mbedmicro/mbed/commit/6c1d63e069ab9bd86de92e8296ca783681257538/
ignore target files not supported by the yotta module
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| mbed_official | 514:7668256dbe61 | 1 | /******************************************************************************* |
| mbed_official | 514:7668256dbe61 | 2 | * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved. |
| mbed_official | 514:7668256dbe61 | 3 | * |
| mbed_official | 514:7668256dbe61 | 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| mbed_official | 514:7668256dbe61 | 5 | * copy of this software and associated documentation files (the "Software"), |
| mbed_official | 514:7668256dbe61 | 6 | * to deal in the Software without restriction, including without limitation |
| mbed_official | 514:7668256dbe61 | 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| mbed_official | 514:7668256dbe61 | 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| mbed_official | 514:7668256dbe61 | 9 | * Software is furnished to do so, subject to the following conditions: |
| mbed_official | 514:7668256dbe61 | 10 | * |
| mbed_official | 514:7668256dbe61 | 11 | * The above copyright notice and this permission notice shall be included |
| mbed_official | 514:7668256dbe61 | 12 | * in all copies or substantial portions of the Software. |
| mbed_official | 514:7668256dbe61 | 13 | * |
| mbed_official | 514:7668256dbe61 | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| mbed_official | 514:7668256dbe61 | 15 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| mbed_official | 514:7668256dbe61 | 16 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| mbed_official | 514:7668256dbe61 | 17 | * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES |
| mbed_official | 514:7668256dbe61 | 18 | * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| mbed_official | 514:7668256dbe61 | 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| mbed_official | 514:7668256dbe61 | 20 | * OTHER DEALINGS IN THE SOFTWARE. |
| mbed_official | 514:7668256dbe61 | 21 | * |
| mbed_official | 514:7668256dbe61 | 22 | * Except as contained in this notice, the name of Maxim Integrated |
| mbed_official | 514:7668256dbe61 | 23 | * Products, Inc. shall not be used except as stated in the Maxim Integrated |
| mbed_official | 514:7668256dbe61 | 24 | * Products, Inc. Branding Policy. |
| mbed_official | 514:7668256dbe61 | 25 | * |
| mbed_official | 514:7668256dbe61 | 26 | * The mere transfer of this software does not imply any licenses |
| mbed_official | 514:7668256dbe61 | 27 | * of trade secrets, proprietary technology, copyrights, patents, |
| mbed_official | 514:7668256dbe61 | 28 | * trademarks, maskwork rights, or any other form of intellectual |
| mbed_official | 514:7668256dbe61 | 29 | * property whatsoever. Maxim Integrated Products, Inc. retains all |
| mbed_official | 514:7668256dbe61 | 30 | * ownership rights. |
| mbed_official | 514:7668256dbe61 | 31 | ******************************************************************************* |
| mbed_official | 514:7668256dbe61 | 32 | */ |
| mbed_official | 536:c48d7048ab6e | 33 | |
| mbed_official | 514:7668256dbe61 | 34 | #include "sleep_api.h" |
| mbed_official | 514:7668256dbe61 | 35 | #include "cmsis.h" |
| mbed_official | 514:7668256dbe61 | 36 | #include "pwrman_regs.h" |
| mbed_official | 514:7668256dbe61 | 37 | #include "pwrseq_regs.h" |
| mbed_official | 514:7668256dbe61 | 38 | #include "ioman_regs.h" |
| mbed_official | 514:7668256dbe61 | 39 | #include "rtc_regs.h" |
| mbed_official | 514:7668256dbe61 | 40 | |
| mbed_official | 514:7668256dbe61 | 41 | static mxc_uart_regs_t *stdio_uart = (mxc_uart_regs_t*)STDIO_UART; |
| mbed_official | 514:7668256dbe61 | 42 | |
| mbed_official | 514:7668256dbe61 | 43 | // Normal wait mode |
| mbed_official | 514:7668256dbe61 | 44 | void sleep(void) |
| mbed_official | 514:7668256dbe61 | 45 | { |
| mbed_official | 514:7668256dbe61 | 46 | // Normal sleep mode for ARM core |
| mbed_official | 514:7668256dbe61 | 47 | SCB->SCR = 0; |
| mbed_official | 514:7668256dbe61 | 48 | |
| mbed_official | 514:7668256dbe61 | 49 | __DSB(); |
| mbed_official | 514:7668256dbe61 | 50 | __WFI(); |
| mbed_official | 514:7668256dbe61 | 51 | } |
| mbed_official | 514:7668256dbe61 | 52 | |
| mbed_official | 514:7668256dbe61 | 53 | // Work-around for issue of clearing power sequencer I/O flag |
| mbed_official | 514:7668256dbe61 | 54 | static void clearAllGPIOWUD(void) |
| mbed_official | 514:7668256dbe61 | 55 | { |
| mbed_official | 514:7668256dbe61 | 56 | uint32_t wud_req0 = MXC_IOMAN->wud_req0; |
| mbed_official | 514:7668256dbe61 | 57 | uint32_t wud_req1 = MXC_IOMAN->wud_req1; |
| mbed_official | 514:7668256dbe61 | 58 | |
| mbed_official | 514:7668256dbe61 | 59 | // I/O must be a wakeup detect to clear |
| mbed_official | 514:7668256dbe61 | 60 | MXC_IOMAN->wud_req0 = 0xffffffff; |
| mbed_official | 514:7668256dbe61 | 61 | MXC_IOMAN->wud_req1 = 0xffffffff; |
| mbed_official | 514:7668256dbe61 | 62 | |
| mbed_official | 514:7668256dbe61 | 63 | // Clear all WUDs |
| mbed_official | 514:7668256dbe61 | 64 | 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 | 514:7668256dbe61 | 65 | MXC_PWRMAN->wud_pulse0 = 1; |
| mbed_official | 514:7668256dbe61 | 66 | |
| mbed_official | 514:7668256dbe61 | 67 | // Restore WUD requests |
| mbed_official | 514:7668256dbe61 | 68 | MXC_IOMAN->wud_req0 = wud_req0; |
| mbed_official | 514:7668256dbe61 | 69 | MXC_IOMAN->wud_req1 = wud_req1; |
| mbed_official | 514:7668256dbe61 | 70 | } |
| mbed_official | 514:7668256dbe61 | 71 | |
| mbed_official | 514:7668256dbe61 | 72 | // Low-power stop mode |
| mbed_official | 514:7668256dbe61 | 73 | void deepsleep(void) |
| mbed_official | 514:7668256dbe61 | 74 | { |
| mbed_official | 514:7668256dbe61 | 75 | __disable_irq(); |
| mbed_official | 514:7668256dbe61 | 76 | |
| mbed_official | 514:7668256dbe61 | 77 | // Wait for all STDIO characters to be sent. The UART clock will stop. |
| mbed_official | 514:7668256dbe61 | 78 | while (stdio_uart->status & MXC_F_UART_STATUS_TX_BUSY); |
| mbed_official | 514:7668256dbe61 | 79 | |
| mbed_official | 514:7668256dbe61 | 80 | // Prepare for LP1 |
| mbed_official | 514:7668256dbe61 | 81 | uint32_t reg0 = MXC_PWRSEQ->reg0; |
| mbed_official | 514:7668256dbe61 | 82 | reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_SVM3EN_SLP; // disable VDD3 SVM during sleep mode |
| mbed_official | 514:7668256dbe61 | 83 | reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_SVM1EN_SLP; // disable VREG18 SVM during sleep mode |
| mbed_official | 514:7668256dbe61 | 84 | if (reg0 & MXC_F_PWRSEQ_REG0_PWR_RTCEN_RUN) { // if real-time clock enabled during run |
| mbed_official | 514:7668256dbe61 | 85 | reg0 |= MXC_F_PWRSEQ_REG0_PWR_RTCEN_SLP; // enable real-time clock during sleep mode |
| mbed_official | 514:7668256dbe61 | 86 | } else { |
| mbed_official | 514:7668256dbe61 | 87 | reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_RTCEN_SLP; // disable real-time clock during sleep mode |
| mbed_official | 514:7668256dbe61 | 88 | } |
| mbed_official | 514:7668256dbe61 | 89 | reg0 |= MXC_F_PWRSEQ_REG0_PWR_CHZYEN_SLP; // enable CHZY regulator during sleep mode |
| mbed_official | 514:7668256dbe61 | 90 | reg0 |= MXC_F_PWRSEQ_REG0_PWR_LP1; // go into LP1 |
| mbed_official | 514:7668256dbe61 | 91 | reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_FIRST_BOOT; // clear first boot flag |
| mbed_official | 514:7668256dbe61 | 92 | MXC_PWRSEQ->reg0 = reg0; |
| mbed_official | 514:7668256dbe61 | 93 | |
| mbed_official | 514:7668256dbe61 | 94 | MXC_PWRSEQ->reg3 = (MXC_PWRSEQ->reg3 & ~MXC_F_PWRSEQ_REG3_PWR_ROSEL_QUICK) | (3 << MXC_F_PWRSEQ_REG3_PWR_ROSEL_QUICK_POS); |
| mbed_official | 514:7668256dbe61 | 95 | |
| mbed_official | 514:7668256dbe61 | 96 | // Deep sleep for ARM core |
| mbed_official | 514:7668256dbe61 | 97 | SCB->SCR = SCB_SCR_SLEEPDEEP_Msk; |
| mbed_official | 514:7668256dbe61 | 98 | |
| mbed_official | 514:7668256dbe61 | 99 | // clear latches for wakeup detect |
| mbed_official | 514:7668256dbe61 | 100 | MXC_PWRSEQ->flags = MXC_PWRSEQ->flags; |
| mbed_official | 514:7668256dbe61 | 101 | if (MXC_PWRSEQ->flags & MXC_F_PWRSEQ_FLAGS_PWR_IO_WAKEUP) { |
| mbed_official | 514:7668256dbe61 | 102 | // attempt work-around for I/O flag clearing issue |
| mbed_official | 514:7668256dbe61 | 103 | clearAllGPIOWUD(); |
| mbed_official | 514:7668256dbe61 | 104 | MXC_PWRSEQ->flags = MXC_F_PWRSEQ_FLAGS_PWR_IO_WAKEUP; |
| mbed_official | 514:7668256dbe61 | 105 | } |
| mbed_official | 514:7668256dbe61 | 106 | |
| mbed_official | 514:7668256dbe61 | 107 | // Wait for pending RTC transaction |
| mbed_official | 514:7668256dbe61 | 108 | while (MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_PENDING); |
| mbed_official | 514:7668256dbe61 | 109 | |
| mbed_official | 514:7668256dbe61 | 110 | // Ensure that the event register is clear |
| mbed_official | 514:7668256dbe61 | 111 | __SEV(); // set event |
| mbed_official | 514:7668256dbe61 | 112 | __WFE(); // clear event |
| mbed_official | 514:7668256dbe61 | 113 | |
| mbed_official | 514:7668256dbe61 | 114 | // Enter LP1 |
| mbed_official | 514:7668256dbe61 | 115 | __WFE(); |
| mbed_official | 514:7668256dbe61 | 116 | // Woke up from LP1 |
| mbed_official | 514:7668256dbe61 | 117 | |
| mbed_official | 514:7668256dbe61 | 118 | // The RTC timer does not update until the next tick |
| mbed_official | 536:c48d7048ab6e | 119 | uint32_t temp = MXC_RTCTMR->timer; |
| mbed_official | 536:c48d7048ab6e | 120 | while (MXC_RTCTMR->timer == temp); |
| mbed_official | 514:7668256dbe61 | 121 | |
| mbed_official | 514:7668256dbe61 | 122 | __enable_irq(); |
| mbed_official | 514:7668256dbe61 | 123 | } |
