Unit PL2303
From Ultibo.org
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Description
The Prolific PL2303 is a USB to serial interface chip used by multiple vendors.
It includes a single serial port with bulk IN and OUT plus interrupt IN endpoints.
Constants
To be documented
Type definitions
To be documented
Public variables
To be documented
Function declarations
Initialization functions
procedure PL2303Init;
Description: To be documented
| Note | None documented |
|---|
PL2303 serial functions
function PL2303SerialDeviceOpen(Serial:PSerialDevice; BaudRate,DataBits,StopBits,Parity,FlowControl,ReceiveDepth,TransmitDepth:LongWord):LongWord;
Description: To be documented
| Note | None documented |
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function PL2303SerialDeviceClose(Serial:PSerialDevice):LongWord;
Description: To be documented
| Note | None documented |
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function PL2303SerialDeviceRead(Serial:PSerialDevice; Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;
Description: To be documented
| Note | None documented |
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function PL2303SerialDeviceWrite(Serial:PSerialDevice; Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;
Description: To be documented
| Note | None documented |
|---|
PL2303 USB functions
function PL2303DriverBind(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;
Description: Bind the PL2303 driver to a USB device if it is suitable
| Device | The USB device to attempt to bind to |
|---|---|
| Interrface | The USB interface to attempt to bind to (or nil for whole device) |
| Return | USB_STATUS_SUCCESS if completed, USB_STATUS_DEVICE_UNSUPPORTED if unsupported or another error code on failure |
function PL2303DriverUnbind(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;
Description: Unbind the PL2303 driver from a USB device
| Device | The USB device to unbind from |
|---|---|
| Interrface | The USB interface to unbind from (or nil for whole device) |
| Return | USB_STATUS_SUCCESS if completed or another error code on failure |
procedure PL2303ReceiveWorker(Request:PUSBRequest);
Description: Called (by a Worker thread) to process a completed USB request from the PL2303 bulk IN endpoint
| Request | The USB request which has completed |
|---|
procedure PL2303ReceiveComplete(Request:PUSBRequest);
Description: Called when a USB request from the PL2303 bulk IN endpoint completes
| Request | The USB request which has completed |
|---|---|
| Note | Request is passed to worker thread for processing to prevent blocking the USB completion |
procedure PL2303TransmitStart(Request:PUSBRequest);
Description: Called to continue transmission of data from the transmit buffer
| Request | The USB transmit request to use |
|---|---|
| Note | Caller must hold the lock on the serial device |
procedure PL2303TransmitWorker(Request:PUSBRequest);
Description: Called (by a Worker thread) to process a completed USB request to the PL2303 bulk OUT endpoint
| Request | The USB request which has completed |
|---|
procedure PL2303TransmitComplete(Request:PUSBRequest);
Description: Called when a USB request to the PL2303 bulk OUT endpoint completes
| Request | The USB request which has completed |
|---|---|
| Note | Request is passed to worker thread for processing to prevent blocking the USB completion |
procedure PL2303InterruptWorker(Request:PUSBRequest);
Description: Called (by a Worker thread) to process a completed USB request to the PL2303 interrupt IN endpoint
| Request | The USB request which has completed |
|---|
procedure PL2303InterruptComplete(Request:PUSBRequest);
Description: Called when a USB request from the PL2303 interrupt IN endpoint completes
| Request | The USB request which has completed |
|---|---|
| Note | Request is passed to worker thread for processing to prevent blocking the USB completion |
PL2303 helper functions
function PL2303CheckDevice(Device:PUSBDevice):LongWord;
Description: Check the Vendor and Device ID against the supported devices
| Device | USB device to check |
|---|---|
| Return | USB_STATUS_SUCCESS if completed or another error code on failure |
function PL2303PatchDevice(Device:PUSBDevice; var Model,Quirks:LongWord):LongWord;
Description: Check the USB device for quirks and model information needed by the driver
| Device | USB device to check |
|---|---|
| Return | USB_STATUS_SUCCESS if completed or another error code on failure |
function PL2303VendorRead(Device:PUSBDevice; Value:Word; Data:PByte):LongWord;
Description: Perform a vendor read request to a PL2303 device
| Note | None documented |
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function PL2303VendorWrite(Device:PUSBDevice; Value,Index:Word):LongWord;
Description: Perform a vendor write request to a PL2303 device
| Note | None documented |
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function PL2303GetLineRequest(Device:PUSBDevice; Data:PByte):LongWord;
Description: Perform a get line request to a PL2303 device
| Note | None documented |
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function PL2303SetLineRequest(Device:PUSBDevice; Data:PByte):LongWord;
Description: Perform a set line request to a PL2303 device
| Note | None documented |
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function PL2303SetControlRequest(Device:PUSBDevice; Value:Word):LongWord;
Description: Perform a set control request to a PL2303 device
| Note | None documented |
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function PL2303EncodeBaudRate(Device:PUSBDevice; BaudRate:LongWord; Data:PByte):LongWord;
Description: Encode a baud rate value into the Line Request buffer for a PL2303 device
| Note | None documented |
|---|
function PL2303GetSupportedRate(BaudRate:LongWord):LongWord;
Description: To be documented
| Note | None documented |
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