37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
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/**
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* @file backup_ram.cpp
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* @brief Non-volatile backup-RAM registers support
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*
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* @date Dec 19, 2017
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*/
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#ifndef BACKUP_RAM_H_
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#define BACKUP_RAM_H_
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#include "main.h"
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#include "efiGpio.h"
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typedef enum {
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/**
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* IAC Stepper motor position, 16-bit (stored in BKP0R 0..15)
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* Used in stepper.cpp
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*/
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BACKUP_STEPPER_POS,
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/**
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* Ignition switch counter, 8-bit (stored in BKP0R 16..23)
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* The counter stores the number of times the ignition switch is turned on. Used for prime injection pulse.
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* We need a protection against 'fake' ignition switch on and off (i.e. no engine started), to avoid repeated prime pulses.
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* So we check and update the ignition switch counter in non-volatile backup-RAM.
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* See startPrimeInjectionPulse() in controllers/trigger/main_trigger_callback.cpp
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*/
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BACKUP_IGNITION_SWITCH_COUNTER,
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} backup_ram_e;
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// load data from backup-power RTC registers (non-volatile memory)
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uint32_t backupRamLoad(backup_ram_e idx);
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// use backup-power RTC registers (non-volatile memory) to store the data
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void backupRamSave(backup_ram_e idx, uint32_t value);
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#endif /* BACKUP_RAM_H_ */
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