mirror of https://github.com/rusefi/rusefi.git
75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/**
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* @file backup_ram.h
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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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#pragma once
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#include "efi_gpio.h"
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#include "error_handling.h"
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enum class backup_ram_e {
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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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StepperPosition,
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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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IgnCounter,
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/* The number of stored backup variables */
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BACKUP_RAM_NUM,
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};
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#define LAST_BACKUP_RAM_ENUM backup_ram_e::BACKUP_RAM_NUM
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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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// make sure that all changes are saved before we shutdown the MCU
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void backupRamFlush(void);
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// These use very specific values to avoid interpreting random garbage memory as a real value
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enum class ErrorCookie : uint32_t {
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None = 0,
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FirmwareError = 0xcafebabe,
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HardFault = 0xdeadbeef,
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};
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#if EFI_PROD_CODE
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struct BackupSramData {
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// Error handling/recovery/reporting information
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struct {
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ErrorCookie Cookie;
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critical_msg_t ErrorString;
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critical_msg_t hardFile;
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int hardLine;
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int check;
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critical_msg_t rawMsg;
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port_extctx FaultCtx;
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uint32_t FaultType;
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uint32_t FaultAddress;
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uint32_t Csfr;
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uint32_t BootCount;
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uint32_t BootCountCookie;
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} Err;
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};
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BackupSramData* getBackupSram();
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#endif // EFI_PROD_CODE
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