TMiletusRaspberryUART
Out of the box, the Raspberry Pi is also equipped with the good old serial port, or called UART.
For serial communications, the baud rate, the bit count and parity can all be set via properties of TMiletusRaspberryUART. Below is a list of available properties and methods for TMiletusRaspberryUART.
Properties for TMiletusRaspberryUART
| Property |
Description |
| BaudRate: Integer |
Set the baud rate |
| PortNum: TMiletusRaspberryUARTPortNum |
Select the UART port. Possible values are miniUART, firstPL011 and devUSB |
| Parity: TMiletusRaspberryUARTParity |
Select the parity. Accepted values are upNone, upOdd, upEven, upMark and upSpace. The default values is upNone |
| BitCount: Integer |
Number of bits in the communication |
| StopBit: TMiletusRaspberryUARTStopBit |
Select the number of stop bits. Accepted values are sb1 (1), sb1andHalf (1.5) and sb2 (2). |
| USBDevice: string |
The USB device path to connect to. When PortNum is set to devUSB. For example: /dev/ttyUSB0 |
Methods for TMiletusRaspberryUART
| Property |
Description |
| Open |
Open the connection |
| Close |
Close the connection |
| WriteBuffer(ABuffer: TBytes; ALength: Integer): TJSPromise |
Write a buffer of data |
| ReadBuffer(var ABuffer: TBytes; ALength: Integer): TJSPromise |
Read a buffer of data |
| CanRead(ATimeout: Integer): TJSPromise |
Check if data can be read from the port. Resolves to a Boolean |
| CanWrite(ATimeout: Integer): TJSPromise |
Check if data can be written to the port. Resolves to a Boolean |
| EnableRTSToggle(AValue: Boolean) |
Enable/disable RTS driven communication |
| WaitingData: TJSPromise |
Check the number of bytes waiting for reading. Resolves to an Integer |
| SendingData: TJSPromise |
Check the number of bytes waiting for sending. Resolves to an Integer |
| ModemStatus: TJSPromise |
Check the modem status code. Resolves to an Integer |
| SetRTS(AValue: Boolean): TJSPromise |
Set the value of the RTS signal |
| GetCTS: TJSPromise |
Get the value of the CTS signal |
| SetDTR(AValue: Boolean) |
Set the value of the DTR signal |
| GetDSR: TJSPromise |
Get the value of the DSR signal |
Events for TMiletusRaspberryUART
| Event |
Description |
| OnOpen |
Event triggered when the connection is opened |
| OnClose |
Event triggered when the connection is closed |