Difference between revisions of "Unit UART"

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<pre style="border: 0; padding-bottom:0px;">function UARTSerialDeviceProperties(Serial:PSerialDevice; Properties:PSerialProperties):LongWord;</pre>
 
<pre style="border: 0; padding-bottom:0px;">function UARTSerialDeviceProperties(Serial:PSerialDevice; Properties:PSerialProperties):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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'''UART helper functions'''
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<pre style="border: 0; padding-bottom:0px;">function UARTGetCount:LongWord; inline;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current UART count</div>
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<pre style="border: 0; padding-bottom:0px;">function UARTDeviceGetDefault:PUARTDevice; inline;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current default UART device</div>
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<pre style="border: 0; padding-bottom:0px;">function UARTDeviceSetDefault(UART:PUARTDevice):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Set the current default UART device</div>
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<pre style="border: 0; padding-bottom:0px;">function UARTDeviceCheck(UART:PUARTDevice):PUARTDevice;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Check if the supplied UART is in the UART table</div>
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<pre style="border: 0; padding-bottom:0px;">procedure UARTLog(Level:LongWord;UART:PUARTDevice; const AText:String);</pre>
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<pre style="border: 0; padding-bottom:0px;">procedure UARTLogInfo(UART:PUARTDevice; const AText:String); inline;</pre>
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<pre style="border: 0; padding-bottom:0px;">procedure UARTLogError(UART:PUARTDevice; const AText:String); inline;</pre>
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<pre style="border: 0; padding-bottom:0px;">procedure UARTLogDebug(UART:PUARTDevice; const AText:String); inline;</pre>
 
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Revision as of 03:47, 9 September 2016

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Description

UART (Universal Asynchronous Receiver Transmitter) devices represent the industry standard serial communications devices that are available on almost every system.

This unit implements the framework for UART devices and provides a standardized API to allow driver specific implementation to be abstracted. All UART devices are also represented as a serial device and this unit handles the relationship between the two devices.

Each UART device returns a set of properties that describe the capabilities of the device and includes a set of flags that indicate what features are supported.

Reads and writes to UART devices are unbuffered and simply pass raw data to and from the caller unless the serial interface is used instead which includes buffering of transmitted and received data. Both reads and writes allow for non blocking so that a caller can avoid waiting for received data to be available or the device to be ready to transmit.

Constants

To be documented

Type definitions

To be documented

Public variables

To be documented

Function declarations


Initialization functions 

procedure UARTInit;
Description: Initialize the UART unit and UART device table
Note Called only during system startup


UART functions 

function UARTDeviceOpen(UART:PUARTDevice; BaudRate,DataBits,StopBits,Parity,FlowControl:LongWord):LongWord;
Description: To be documented
Note To be documented 


function UARTDeviceClose(UART:PUARTDevice):LongWord;
Description: To be documented
Note To be documented 


function UARTDeviceRead(UART:PUARTDevice; Buffer:Pointer; Size,Flags:LongWord;var Count:LongWord):LongWord;
Description: To be documented
Note To be documented 


function UARTDeviceWrite(UART:PUARTDevice; Buffer:Pointer; Size,Flags:LongWord;var Count:LongWord):LongWord;
Description: To be documented
Note To be documented 


function UARTDeviceStatus(UART:PUARTDevice):LongWord;
Description: To be documented
Note To be documented 


function UARTDeviceProperties(UART:PUARTDevice; Properties:PUARTProperties):LongWord;
Description: To be documented
Note To be documented 


function UARTDeviceCreate:PUARTDevice;
Description: Create a new UART entry
Return Pointer to new UART entry or nil if UART could not be created 


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


function UARTDeviceDestroy(UART:PUARTDevice):LongWord;
Description: Destroy an existing UART entry
Note To be documented 


function UARTDeviceRegister(UART:PUARTDevice):LongWord;
Description: Register a new UART in the UART table
Note To be documented 


function UARTDeviceDeregister(UART:PUARTDevice):LongWord;
Description: Deregister a UART from the UART table
Note To be documented 


function UARTDeviceFind(UARTId:LongWord):PUARTDevice;
Description: To be documented
Note To be documented 


function UARTDeviceFindByName(const Name:String):PUARTDevice; inline;
Description: To be documented
Note To be documented 


function UARTDeviceFindByDescription(const Description:String):PUARTDevice; inline;
Description: To be documented
Note To be documented 


function UARTDeviceEnumerate(Callback:TUARTEnumerate; Data:Pointer):LongWord;
Description: To be documented
Note To be documented 


function UARTDeviceNotification(UART:PUARTDevice; Callback:TUARTNotification; Data:Pointer; Notification,Flags:LongWord):LongWord;
Description: To be documented
Note To be documented


UART serial functions 

function UARTSerialDeviceOpen(Serial:PSerialDevice; BaudRate,DataBits,StopBits,Parity,FlowControl,ReceiveDepth,TransmitDepth:LongWord):LongWord;
Description: To be documented
Note To be documented 


function UARTSerialDeviceClose(Serial:PSerialDevice):LongWord;
Description: To be documented
Note To be documented 


function UARTSerialDeviceRead(Serial:PSerialDevice; Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;
Description: To be documented
Note To be documented 


function UARTSerialDeviceWrite(Serial:PSerialDevice; Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;
Description: To be documented
Note To be documented 


function UARTSerialDeviceStatus(Serial:PSerialDevice):LongWord;
Description: To be documented
Note To be documented 


function UARTSerialDeviceProperties(Serial:PSerialDevice; Properties:PSerialProperties):LongWord;
Description: To be documented
Note To be documented


UART helper functions 

function UARTGetCount:LongWord; inline;
Description: Get the current UART count
Note To be documented 


function UARTDeviceGetDefault:PUARTDevice; inline;
Description: Get the current default UART device
Note To be documented 


function UARTDeviceSetDefault(UART:PUARTDevice):LongWord;
Description: Set the current default UART device
Note To be documented 


function UARTDeviceCheck(UART:PUARTDevice):PUARTDevice;
Description: Check if the supplied UART is in the UART table
Note To be documented 


procedure UARTLog(Level:LongWord;UART:PUARTDevice; const AText:String);
Description: To be documented
Note To be documented 


procedure UARTLogInfo(UART:PUARTDevice; const AText:String); inline;
Description: To be documented
Note To be documented 


procedure UARTLogError(UART:PUARTDevice; const AText:String); inline;
Description: To be documented
Note To be documented 


procedure UARTLogDebug(UART:PUARTDevice; const AText:String); inline;
Description: To be documented
Note To be documented


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