Unit RTC

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Description


The RTC unit provides the device interface for real time clock modules to be registered with Ultibo core. Each RTC module requires a driver that communicates with the specific hardware to implement the device interface although many devices may use the same chip and will be covered by a single driver.

This unit registers the RTCGetTime and RTCSetTime functions with the Platform unit to enable hardware independent access to a real time clock module.

Constants



RTC specific constants RTC_*
RTC_NAME_PREFIX = 'RTC'; Name prefix for RTC Devices


RTC device type constants RTC_TYPE_*
RTC_TYPE_NONE = 0;  


RTC device state constants RTC_STATE_*
RTC_STATE_DISABLED = 0;  
RTC_STATE_ENABLED = 1;  


RTC device flag constants RTC_FLAG_*
RTC_FLAG_NONE = $00000000;  
RTC_FLAG_ALARM = $00000001; Device supports one or more alarms
RTC_FLAG_WATCHDOG = $00000002; Device has a watchdog timer function


RTC logging constants RTC_LOG_*
RTC_LOG_LEVEL_DEBUG = LOG_LEVEL_DEBUG; RTC debugging messages
RTC_LOG_LEVEL_INFO = LOG_LEVEL_INFO; RTC informational messages, such as a device being attached or detached
RTC_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR; RTC error messages
RTC_LOG_LEVEL_NONE = LOG_LEVEL_NONE; No RTC messages


Type definitions


To be documented

Public variables


To be documented

Function declarations



Initialization functions

procedure RTCInit;
Description: To be documented
Note None documented


RTC functions

function RTCDeviceStart(RTC:PRTCDevice):LongWord;
Description: To be documented
Note None documented


function RTCDeviceStop(RTC:PRTCDevice):LongWord;
Description: To be documented
Note None documented


function RTCDeviceGetTime(RTC:PRTCDevice):Int64;
Description: To be documented
Note None documented


function RTCDeviceSetTime(RTC:PRTCDevice; const Time:Int64):Int64;
Description: To be documented
Note None documented


function RTCDeviceProperties(RTC:PRTCDevice; Properties:PRTCProperties):LongWord;
Description: To be documented
Note None documented


function RTCDeviceCreate:PRTCDevice;
Description: Create a new RTC entry
Return Pointer to new RTC entry or nil if RTC could not be created


function RTCDeviceCreateEx(Size:LongWord):PRTCDevice;
Description: Create a new RTC entry
Size Size in bytes to allocate for new RTC (Including the RTC entry)
Return Pointer to new RTC entry or nil if RTC could not be created


function RTCDeviceDestroy(RTC:PRTCDevice):LongWord;
Description: Destroy an existing RTC entry
Note None documented


function RTCDeviceRegister(RTC:PRTCDevice):LongWord;
Description: Register a new RTC in the RTC table
Note None documented


function RTCDeviceDeregister(RTC:PRTCDevice):LongWord;
Description: Deregister a RTC from the RTC table
Note None documented


function RTCDeviceFind(RTCId:LongWord):PRTCDevice;
Description: To be documented
Note None documented


function RTCDeviceFindByName(const Name:String):PRTCDevice; inline;
Description: To be documented
Note None documented


function RTCDeviceFindByDescription(const Description:String):PRTCDevice; inline;
Description: To be documented
Note None documented


function RTCDeviceEnumerate(Callback:TRTCEnumerate; Data:Pointer):LongWord;
Description: To be documented
Note None documented


function RTCDeviceNotification(RTC:PRTCDevice; Callback:TRTCNotification; Data:Pointer; Notification,Flags:LongWord):LongWord;
Description: To be documented
Note None documented


RTL RTC functions

function SysRTCAvailable:Boolean;
Description: Check if an RTC device is available
Note None documented


function SysRTCGetTime:Int64;
Description: Get the current time from a RTC device
Note Returned time is 100 nanosecond ticks since 1 January 1601


function SysRTCSetTime(const Time:Int64):Int64;
Description: Set the current time for a RTC device
Time The time to be set
Return The device time after setting (or 0 on failure)
Note Time and returned time is 100 nanosecond ticks since 1 January 1601


RTC helper functions

function RTCGetCount:LongWord; inline;
Description: Get the current RTC count
Note None documented


function RTCDeviceGetDefault:PRTCDevice; inline;
Description: Get the current default RTC device
Note None documented


function RTCDeviceSetDefault(RTC:PRTCDevice):LongWord;
Description: Set the current default RTC device
Note None documented


function RTCDeviceCheck(RTC:PRTCDevice):PRTCDevice;
Description: Check if the supplied RTC is in the RTC table
Note None documented


function RTCTimeIsValid(const Time:TSystemTime):Boolean;
Description: To be documented
Note None documented


function RTCSystemTimeToFileTime(const SystemTime:TSystemTime; var FileTime:Int64):Boolean;
Description: System time is assumed to be UTC and returned file time is UTC
Note None documented


function RTCFileTimeToSystemTime(const FileTime:Int64; var SystemTime:TSystemTime):Boolean;
Description: File time is assumed to be UTC and returned system time is UTC
Note None documented


procedure RTCLog(Level:LongWord; RTC:PRTCDevice; const AText:String);
Description: To be documented
Note None documented


procedure RTCLogInfo(RTC:PRTCDevice; const AText:String); inline;
Description: To be documented
Note None documented


procedure RTCLogError(RTC:PRTCDevice; const AText:String); inline;
Description: To be documented
Note None documented


procedure RTCLogDebug(RTC:PRTCDevice; const AText:String); inline;
Description: To be documented
Note None documented


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