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@ -5,6 +5,47 @@ |
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#if defined(NRF52_PLATFORM) |
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// noinit variables survive watchdog, soft, pin, and lockup resets (RAM retained).
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// Lost on power-on and System OFF (magic check handles this).
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extern uint32_t _noinit_backup_time __attribute__((section(".noinit"))); |
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extern uint32_t _noinit_backup_magic __attribute__((section(".noinit"))); |
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#define NRF52_BACKUP_MAGIC 0xAA55CC33 |
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#define NRF52_TIME_MIN 1772323200 // 1 Mar 2026
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class NRF52RTCClock : public mesh::RTCClock { |
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uint32_t base_time; |
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uint64_t accumulator; |
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unsigned long prev_millis; |
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public: |
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NRF52RTCClock() { |
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if (_noinit_backup_magic == NRF52_BACKUP_MAGIC && _noinit_backup_time > NRF52_TIME_MIN) { |
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base_time = _noinit_backup_time; |
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} else { |
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base_time = NRF52_TIME_MIN; |
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} |
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accumulator = 0; |
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prev_millis = millis(); |
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} |
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uint32_t getCurrentTime() override { return base_time + accumulator / 1000; } |
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void setCurrentTime(uint32_t time) override { |
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base_time = time; |
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accumulator = 0; |
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prev_millis = millis(); |
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_noinit_backup_time = time; |
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_noinit_backup_magic = NRF52_BACKUP_MAGIC; |
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} |
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void tick() override { |
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unsigned long now = millis(); |
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accumulator += (now - prev_millis); |
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prev_millis = now; |
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uint32_t current = base_time + accumulator / 1000; |
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if (current > NRF52_TIME_MIN && current != _noinit_backup_time) { |
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_noinit_backup_time = current; |
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_noinit_backup_magic = NRF52_BACKUP_MAGIC; |
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} |
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} |
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}; |
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#ifdef NRF52_POWER_MANAGEMENT |
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// Shutdown Reason Codes (stored in GPREGRET before SYSTEMOFF)
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#define SHUTDOWN_REASON_NONE 0x00 |
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Wessel Nieboer
3 months ago
Wessel Nieboer