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# Test machine.UART.IRQ_RX firing for each character received.
#
# IMPORTANT: This test requires hardware connections: the UART TX and RX
# pins must be wired together.
try:
from machine import UART
UART.IRQ_RX
except (ImportError, AttributeError):
print("SKIP")
raise SystemExit
import time, sys
if "CC3200" in sys.implementation._machine:
# CC3200 doesn't work because it's too slow and has an allocation error in the handler.
print("SKIP")
raise SystemExit
from target_wiring import uart_loopback_args, uart_loopback_kwargs
byte_by_byte = "ItsyBitsy M0" in sys.implementation._machine
def irq(u):
print("IRQ_RX:", bool(u.irq().flags() & u.IRQ_RX), "data:", u.read(1))
text = "1234"
# Test that the IRQ is called for each byte received.
# Use slow baudrates so that the IRQ has time to run.
for bits_per_s in (2400, 9600):
uart = UART(*uart_loopback_args, baudrate=bits_per_s, **uart_loopback_kwargs)
uart.irq(irq, uart.IRQ_RX)
print("write", bits_per_s)
if byte_by_byte:
# slow devices need data to be sent slow
for c in text:
uart.write(c)
uart.flush()
else:
uart.write(text)
uart.flush()
time.sleep_ms(100)
print("done")
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