Component: UART Software (Timer) (Comms: Interface)
| Author | MatrixTSL |
| Version | 1.0 (Release) |
| Category | Comms: Interface |
Contents
UART Software (Timer) component
Creates a reliable software UART that can be driven using a timer interrupt setup by the user. The timer interrupt must be interrupting at the required baud rate. e.g 9600Hz.
Examples
Simple example showing how to enable a timer interrupt at the desired baud rate then receive a string. If anything is received then it will be echoed back out and displayed on a LCD
Downloadable macro reference
SendString
Sends an string to the transmit buffer
Parameters
- <- STRING Data
- This parameter may be returned back to the caller
Return value
- This call does not return a value
ReceiveArray
Gets an array of values from the receive buffer.
Returns number of values received.
Parameters
- UINT Values
- UINT NumValues
- UINT Timeout
- Time in milliseconds to wait for data
Return value
SendArray
Sends an array of values to the transmit buffer
Parameters
- UINT Values
- UINT NumValues
Return value
- This call does not return a value
UART_Timer_Process
Called as part of a timer interrupt at the specific UART baud rate.
Parameters
- This macro has no parameters
Return value
- This call does not return a value
ReceiveValue
Gets a single value from the receive buffer
Parameters
- UINT Timeout
- Time in milliseconds to wait for data
Return value
SendValue
Sends a single value to the transmit buffer
Parameters
- UINT Value
Return value
- This call does not return a value
CheckBuffer
Returns the number of values in the transmit or receive buffer
Parameters
- BOOL Buffer
- 0=Transmit / 1=Receive
Return value
ReceiveString
Gets a string from the receive buffer
Parameters
- UINT MaxChars
- UINT Timeout
- Time in milliseconds to wait for data
Return value
Initialise
Initialises the UART component pins ready to send and receive data
Parameters
- This macro has no parameters
Return value
- This call does not return a value
Simulation macro reference
This component does not contain any simulation macros
Property reference
Data Bits
This property is of type Fixed list of ints and can be referenced with the variable name DataBits.
Sets the number of data bits in a single packet, 7-bits provides values 0-127, 8-bits provides values 0-255 and 9-bits provides values 0-511.
9-bit data is often used for 8-bit plus a parity bit which is used for error detection.
Stop Bits
This property is of type Fixed list of ints and can be referenced with the variable name StopBits.
Number of stop bits at the end of each packet. Used to adjust the minimum spacing between packets.
Use TX
This property is of type True or false and can be referenced with the variable name UseTx.
Allows the Transmit pin to be enabled / disabled
Use RX
This property is of type True or false and can be referenced with the variable name UseRx.
Allows the Receive pin to be enabled / disabled
Transmit Pin
This property is of type Single digital pin and can be referenced with the variable name TXPin.
Pin assigned to transmitting data
Transmit Buffer Size
This property is of type Unsigned integer and can be referenced with the variable name TXBufferSize.
Number of bytes that can be stored in the outgoing transmit buffer
Receive Pin
This property is of type Single digital pin and can be referenced with the variable name RXPin.
Pin assigned to receiving data
Receive Buffer Size
This property is of type Unsigned integer and can be referenced with the variable name RXBufferSize.
Number of bytes that can be stored in the incoming receive buffer
Injector
This property is of type Fixed list of ints and can be referenced with the variable name Injector.
Points to an Injector component on the panel to provide a means to connect the simulation data to something useful such as another instance of Flowcode or real world hardware.
