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# Test machine.UART.IRQ_BREAK firing after a break is received.
#
# IMPORTANT: This test requires hardware connections: the UART TX and RX
# pins must be wired together.
try:
from machine import UART
UART.IRQ_BREAK
except (ImportError, AttributeError):
print("SKIP")
raise SystemExit
import time, sys
# Configure pins based on the target.
if "esp32" in sys.platform:
_machine = sys.implementation._machine
if "ESP32S2" in _machine or "ESP32C3" in _machine or "ESP32C6" in _machine:
print("SKIP")
raise SystemExit
# ESP32 needs separate UART instances for the test
recv_uart_id = 1
recv_tx_pin = 14
recv_rx_pin = 5
send_uart_id = 2
send_tx_pin = 4
send_rx_pin = 12
elif "rp2" in sys.platform:
recv_uart_id = 0
send_uart_id = 0
recv_tx_pin = "GPIO0"
recv_rx_pin = "GPIO1"
else:
print("Please add support for this test on this platform.")
raise SystemExit
def irq(u):
print("IRQ_BREAK:", bool(u.irq().flags() & u.IRQ_BREAK), "data:", u.read(1))
# Test that the IRQ is called for each break received.
for bits_per_s in (2400, 9600, 57600):
recv_uart = UART(recv_uart_id, bits_per_s, tx=recv_tx_pin, rx=recv_rx_pin)
if recv_uart_id != send_uart_id:
send_uart = UART(send_uart_id, bits_per_s, tx=send_tx_pin, rx=send_rx_pin)
else:
send_uart = recv_uart
recv_uart.irq(irq, recv_uart.IRQ_BREAK)
print("write", bits_per_s)
for i in range(3):
send_uart.write(str(i))
send_uart.flush()
time.sleep_ms(10)
send_uart.sendbreak()
time.sleep_ms(10)
if "esp32" in sys.platform:
# On esp32 a read is needed to read in the break byte.
recv_uart.read()
print("done")
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