110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2020 microDev
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* Copyright (c) 2020 Dan Halbert for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <string.h>
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#ifdef MY_DEBUGUART
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#include "supervisor/serial.h" // dbg_printf()
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#endif
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#include "py/runtime.h"
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#include "common-hal/alarm/SleepMemory.h"
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#define RTC_DATA_ATTR __attribute__((section(".uninitialized")))
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static RTC_DATA_ATTR uint8_t _sleep_mem[SLEEP_MEMORY_LENGTH];
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static RTC_DATA_ATTR uint32_t _sleep_mem_magicnum;
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#define SLEEP_MEMORY_DATA_GUARD 0xad0000af
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#define SLEEP_MEMORY_DATA_GUARD_MASK 0xff0000ff
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static int is_sleep_memory_valid(void) {
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if ((_sleep_mem_magicnum & SLEEP_MEMORY_DATA_GUARD_MASK)
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== SLEEP_MEMORY_DATA_GUARD) {
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return 1;
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}
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return 0;
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}
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static void dumpRAMreg(void) {
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#ifdef MY_DEBUGUART
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int i;
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for(i = 0; i <= 8; ++i) {
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dbg_printf(" RAM%d:%08X", i, (int)(NRF_POWER->RAM[i].POWER));
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if (i==4) dbg_printf("\r\n");
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}
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dbg_printf("\r\n");
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#endif
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}
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static void initialize_sleep_memory(void) {
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memset((uint8_t *)_sleep_mem, 0, SLEEP_MEMORY_LENGTH);
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// also, set RAM[n].POWER register for RAM retention
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// nRF52840 has RAM[0..7].Section[0..1] and RAM[8].Section[0..5]
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// nRF52833 has RAM[0..7].Section[0..1] and RAM[8].Section[0,1]
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dumpRAMreg();
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for(int ram = 0; ram <= 7; ++ram) {
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NRF_POWER->RAM[ram].POWERSET = 0x00030000; // RETENTION for section 0,1
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};
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#ifdef NRF52840
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NRF_POWER->RAM[8].POWERSET = 0x001F0000; // RETENTION for section 0..5
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#endif
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#ifdef NRF52833
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NRF_POWER->RAM[8].POWERSET = 0x00030000; // RETENTION for section 0,1
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#endif
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dumpRAMreg();
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_sleep_mem_magicnum = SLEEP_MEMORY_DATA_GUARD;
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}
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void alarm_sleep_memory_reset(void) {
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if (!is_sleep_memory_valid()) {
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initialize_sleep_memory();
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#ifdef MY_DEBUGUART
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dbg_printf("_sleep_mem[] initialized\r\n");
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#endif
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}
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}
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uint32_t common_hal_alarm_sleep_memory_get_length(alarm_sleep_memory_obj_t *self) {
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return sizeof(_sleep_mem);
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}
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bool common_hal_alarm_sleep_memory_set_bytes(alarm_sleep_memory_obj_t *self, uint32_t start_index, const uint8_t* values, uint32_t len) {
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if (start_index + len > sizeof(_sleep_mem)) {
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return false;
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}
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memcpy((uint8_t *) (_sleep_mem + start_index), values, len);
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return true;
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}
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void common_hal_alarm_sleep_memory_get_bytes(alarm_sleep_memory_obj_t *self, uint32_t start_index, uint8_t* values, uint32_t len) {
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if (start_index + len > sizeof(_sleep_mem)) {
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return;
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}
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memcpy(values, (uint8_t *) (_sleep_mem + start_index), len);
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}
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