Unit DS1307

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Description

The Maxim DS1307 is an I2C interface, battery backed real time clock chip with full BCD clock and calendar and 56 bytes of software accessible NVRAM. The chip supports 12 or 24 hour format and is widely used in low cost RTC devices available from a range of suppliers.

This driver extends the real time clock API to include functions for directly reading and writing the NVRAM which could be used for storing device specific information and configuration or for non volatile storage of keys, passwords or tokens.

Constants

To be documented

Type definitions

To be documented

Public variables

To be documented

Function declarations


Initialization functions

[Expand] 
procedure DS1307Init;
Description: To be documented


DS1307 RTC functions

[Expand] 
function DS1307RTCStart(RTC:PRTCDevice):LongWord;
Description: To be documented


[Expand] 
function DS1307RTCStop(RTC:PRTCDevice):LongWord;
Description: To be documented


[Expand] 
function DS1307RTCGetTime(RTC:PRTCDevice):Int64;
Description: To be documented


[Expand] 
function DS1307RTCSetTime(RTC:PRTCDevice; const Time:Int64):Int64;
Description: To be documented


DS1307 helper functions

[Expand] 
function DS1307ReadRTC(RTC:PRTCDevice; Buffer:Pointer; Size:LongWord):LongWord;
Description: To be documented


[Expand] 
function DS1307WriteRTC(RTC:PRTCDevice; Buffer:Pointer; Size:LongWord):LongWord;
Description: To be documented


[Expand] 
function DS1307ReadNVRAM(RTC:PRTCDevice; Offset:Byte; Buffer:Pointer; Size:LongWord):LongWord;
Description: To be documented


[Expand] 
function DS1307WriteNVRAM(RTC:PRTCDevice; Offset:Byte; Buffer:Pointer; Size:LongWord):LongWord;
Description: To be documented


[Expand] 
function DS1307ReadControl(RTC:PRTCDevice; var Control:Byte):LongWord;
Description: To be documented


[Expand] 
function DS1307WriteControl(RTC:PRTCDevice; Control:Byte):LongWord;
Description: To be documented


[Expand] 
function DS1307DefaultRTCTime(RTC:PRTCDevice; Buffer:Pointer; Size:LongWord):Boolean;
Description: To be documented


[Expand] 
function DS1307FileTimeToRTCTime(RTC:PRTCDevice; const FileTime:Int64; Buffer:Pointer; Size:LongWord):Boolean;
Description: To be documented


[Expand] 
function DS1307RTCTimeToFileTime(RTC:PRTCDevice; Buffer:Pointer; Size:LongWord; var FileTime:Int64):Boolean;
Description: To be documented


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