UART Terminal

[urish]

Sketch of a code to implement a UART terminal using the RP2040 hardware UART peripheral. The terminal is connected to the user project pins ui_in[3] (12) and uo_out[4], and is running at 115200 baud rate.

import uselect
import sys
from machine import UART, Pin

uart1 = UART(0, baudrate=115200, tx=Pin(12), rx=Pin(13))
poll = uselect.poll()
poll.register(sys.stdin, uselect.POLLIN)

while True:
	if poll.poll(0):
		_ = uart1.write(sys.stdin.buffer.read(1))
	uart_data = uart1.read()
	if uart_data:
		_ = sys.stdout.write(uart_data)

Currently, the terminal does not forward the Ctrl+C character to the UART port. Instead, it stops running. You can change this behavior by calling micropython.kbd_intr(0).

Also, it'd be more efficient to poll() for both stdin and uart1, if possible.

[urish]

Update for SDK v2.0.0 / TT06 DB:

import uselect
import sys
from machine import UART

uart = UART(0, baudrate=115200, tx=tt.pins.ui_in3.raw_pin, rx=tt.pins.uo_out4.raw_pin)
poll = uselect.poll()
poll.register(sys.stdin, uselect.POLLIN)

while True:
	if poll.poll(0):
		_ = uart.write(sys.stdin.buffer.read(1))
	uart_data = uart.read()
	if uart_data:
		_ = sys.stdout.write(uart_data)