circuitpython/tests/pyb/can.py

310 lines
6.6 KiB
Python

try:
from pyb import CAN
except ImportError:
print('SKIP')
raise SystemExit
from array import array
import micropython
import pyb
# test we can correctly create by id or name
for bus in (-1, 0, 1, 2, 3, "YA", "YB", "YC"):
try:
CAN(bus, CAN.LOOPBACK)
print("CAN", bus)
except ValueError:
print("ValueError", bus)
CAN(1).deinit()
CAN.initfilterbanks(14)
can = CAN(1)
print(can)
# Test state when de-init'd
print(can.state() == can.STOPPED)
can.init(CAN.LOOPBACK)
print(can)
print(can.any(0))
# Test state when freshly created
print(can.state() == can.ERROR_ACTIVE)
# Test that restart can be called
can.restart()
# Test info returns a sensible value
print(can.info())
# Catch all filter
can.setfilter(0, CAN.MASK16, 0, (0, 0, 0, 0))
can.send('abcd', 123, timeout=5000)
print(can.any(0), can.info())
print(can.recv(0))
can.send('abcd', -1, timeout=5000)
print(can.recv(0))
can.send('abcd', 0x7FF + 1, timeout=5000)
print(can.recv(0))
# Test too long message
try:
can.send('abcdefghi', 0x7FF, timeout=5000)
except ValueError:
print('passed')
else:
print('failed')
# Test that recv can work without allocating memory on the heap
buf = bytearray(10)
l = [0, 0, 0, memoryview(buf)]
l2 = None
micropython.heap_lock()
can.send('', 42)
l2 = can.recv(0, l)
assert l is l2
print(l, len(l[3]), buf)
can.send('1234', 42)
l2 = can.recv(0, l)
assert l is l2
print(l, len(l[3]), buf)
can.send('01234567', 42)
l2 = can.recv(0, l)
assert l is l2
print(l, len(l[3]), buf)
can.send('abc', 42)
l2 = can.recv(0, l)
assert l is l2
print(l, len(l[3]), buf)
micropython.heap_unlock()
# Test that recv can work with different arrays behind the memoryview
can.send('abc', 1)
print(bytes(can.recv(0, [0, 0, 0, memoryview(array('B', range(8)))])[3]))
can.send('def', 1)
print(bytes(can.recv(0, [0, 0, 0, memoryview(array('b', range(8)))])[3]))
# Test for non-list passed as second arg to recv
can.send('abc', 1)
try:
can.recv(0, 1)
except TypeError:
print('TypeError')
# Test for too-short-list passed as second arg to recv
can.send('abc', 1)
try:
can.recv(0, [0, 0, 0])
except ValueError:
print('ValueError')
# Test for non-memoryview passed as 4th element to recv
can.send('abc', 1)
try:
can.recv(0, [0, 0, 0, 0])
except TypeError:
print('TypeError')
# Test for read-only-memoryview passed as 4th element to recv
can.send('abc', 1)
try:
can.recv(0, [0, 0, 0, memoryview(bytes(8))])
except ValueError:
print('ValueError')
# Test for bad-typecode-memoryview passed as 4th element to recv
can.send('abc', 1)
try:
can.recv(0, [0, 0, 0, memoryview(array('i', range(8)))])
except ValueError:
print('ValueError')
del can
# Testing extended IDs
can = CAN(1, CAN.LOOPBACK, extframe = True)
# Catch all filter
can.setfilter(0, CAN.MASK32, 0, (0, 0))
print(can)
try:
can.send('abcde', 0x7FF + 1, timeout=5000)
except ValueError:
print('failed')
else:
r = can.recv(0)
if r[0] == 0x7FF+1 and r[3] == b'abcde':
print('passed')
else:
print('failed, wrong data received')
# Test filters
for n in [0, 8, 16, 24]:
filter_id = 0b00001000 << n
filter_mask = 0b00011100 << n
id_ok = 0b00001010 << n
id_fail = 0b00011010 << n
can.clearfilter(0)
can.setfilter(0, pyb.CAN.MASK32, 0, (filter_id, filter_mask))
can.send('ok', id_ok, timeout=3)
if can.any(0):
msg = can.recv(0)
print((hex(filter_id), hex(filter_mask), hex(msg[0]), msg[3]))
can.send("fail", id_fail, timeout=3)
if can.any(0):
msg = can.recv(0)
print((hex(filter_id), hex(filter_mask), hex(msg[0]), msg[3]))
del can
# Test RxCallbacks
can = CAN(1, CAN.LOOPBACK)
can.setfilter(0, CAN.LIST16, 0, (1, 2, 3, 4))
can.setfilter(1, CAN.LIST16, 1, (5, 6, 7, 8))
def cb0(bus, reason):
print('cb0')
if reason == 0:
print('pending')
if reason == 1:
print('full')
if reason == 2:
print('overflow')
def cb1(bus, reason):
print('cb1')
if reason == 0:
print('pending')
if reason == 1:
print('full')
if reason == 2:
print('overflow')
def cb0a(bus, reason):
print('cb0a')
if reason == 0:
print('pending')
if reason == 1:
print('full')
if reason == 2:
print('overflow')
def cb1a(bus, reason):
print('cb1a')
if reason == 0:
print('pending')
if reason == 1:
print('full')
if reason == 2:
print('overflow')
can.rxcallback(0, cb0)
can.rxcallback(1, cb1)
can.send('11111111',1, timeout=5000)
can.send('22222222',2, timeout=5000)
can.send('33333333',3, timeout=5000)
can.rxcallback(0, cb0a)
can.send('44444444',4, timeout=5000)
can.send('55555555',5, timeout=5000)
can.send('66666666',6, timeout=5000)
can.send('77777777',7, timeout=5000)
can.rxcallback(1, cb1a)
can.send('88888888',8, timeout=5000)
print(can.recv(0))
print(can.recv(0))
print(can.recv(0))
print(can.recv(1))
print(can.recv(1))
print(can.recv(1))
can.send('11111111',1, timeout=5000)
can.send('55555555',5, timeout=5000)
print(can.recv(0))
print(can.recv(1))
del can
# Testing asynchronous send
can = CAN(1, CAN.LOOPBACK)
can.setfilter(0, CAN.MASK16, 0, (0, 0, 0, 0))
while can.any(0):
can.recv(0)
can.send('abcde', 1, timeout=0)
print(can.any(0))
while not can.any(0):
pass
print(can.recv(0))
try:
can.send('abcde', 2, timeout=0)
can.send('abcde', 3, timeout=0)
can.send('abcde', 4, timeout=0)
can.send('abcde', 5, timeout=0)
except OSError as e:
if str(e) == '16':
print('passed')
else:
print('failed')
pyb.delay(500)
while can.any(0):
print(can.recv(0))
# Testing rtr messages
bus1 = CAN(1, CAN.LOOPBACK)
bus2 = CAN(2, CAN.LOOPBACK, extframe = True)
while bus1.any(0):
bus1.recv(0)
while bus2.any(0):
bus2.recv(0)
bus1.setfilter(0, CAN.LIST16, 0, (1, 2, 3, 4))
bus1.setfilter(1, CAN.LIST16, 0, (5, 6, 7, 8), rtr=(True, True, True, True))
bus1.setfilter(2, CAN.MASK16, 0, (64, 64, 32, 32), rtr=(False, True))
bus2.setfilter(0, CAN.LIST32, 0, (1, 2), rtr=(True, True))
bus2.setfilter(1, CAN.LIST32, 0, (3, 4), rtr=(True, False))
bus2.setfilter(2, CAN.MASK32, 0, (16, 16), rtr=(False,))
bus2.setfilter(2, CAN.MASK32, 0, (32, 32), rtr=(True,))
bus1.send('',1,rtr=True)
print(bus1.any(0))
bus1.send('',5,rtr=True)
print(bus1.recv(0))
bus1.send('',6,rtr=True)
print(bus1.recv(0))
bus1.send('',7,rtr=True)
print(bus1.recv(0))
bus1.send('',16,rtr=True)
print(bus1.any(0))
bus1.send('',32,rtr=True)
print(bus1.recv(0))
bus2.send('',1,rtr=True)
print(bus2.recv(0))
bus2.send('',2,rtr=True)
print(bus2.recv(0))
bus2.send('',3,rtr=True)
print(bus2.recv(0))
bus2.send('',4,rtr=True)
print(bus2.any(0))