UART

UART

Availability

Device

Description

The UART class represents UART asynchronous serial ports, of which imps currently provide between two and five, depending on type. The imp002 module has an additional ‘half’ UART that is receive-only; there is no available transmit pin.

Objects representing a given imp’s specific UART buses are automatically instantiated at start-up and are accessed through the following object properties of the hardware object:

imp	UART 1	UART 2	UART 3	UART 4	UART 5	UART 6	UART 7
imp001	uart12	uart1289	uart57
imp002	uart12	uart1289	uart57	uart6E	uartB
imp003	uartDM	uartFG	uartQRPW	uartUVGD	uartWJ
imp004m	uartBCAW	uartFGJH	uartHJ	uartQ
imp005	uart0	uart1	uart2
imp006	uartABCD	uartPQRS	uartXEFGH	uartXJKLM	uartYABCD	uartYEFGH	uartYJKLM
impC001	uartDCAB	uartEVMT	uartNU	uartHJKL	uartPQSR	uartXBADC	uartYABCD

All of the imp005’s UART buses are all accessed via dedicated pins rather than GPIO, hence the slightly different nomenclature.

For more information on every imp modules’ pin-outs, see the imp pin mux.
For more information on the UART bus and its use in imp-based projects, please see UART Explained.

Member Entities

The UART object has the following member methods:

uart.configure() — Configures the UART serial bus

uart.disable() — Disables the UART interface

uart.flags() — Returns event flags set by the previous UART transaction

uart.flush() — Pauses program execution until the UART’s output FIFO has drained

uart.read() — Reads a byte from the serial port

uart.readblob() — Reads a specified number of bytes from the serial port

uart.readstring() — Reads a string of characters from the serial port

uart.setrxfifosize() — Specifies the size of the UART receive FIFO

uart.settxactive() — Configures a pin as a UART-transmit-active indicator

uart.settxfifosize() — Sets the size of the UART transmit FIFO

uart.write() — Sends one or more bytes to the serial port

Availability

Description

Member Entities

See Also