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import time
from dfatool.lennart.SigrokInterface import SigrokInterface
import sigrok.core as sr
from sigrok.core.classes import *
from util.ByteHelper import ByteHelper
class SigrokAPIInterface(SigrokInterface):
def datafeed_changes(self, device, packet):
"""
Callback type with changes analysis
:param device: device object
:param packet: data (String with binary data)
"""
data = ByteHelper.rawbytes(self.output.receive(packet))
if data:
# only using every second byte,
# because only every second contains the useful information.
for x in data[1::2]:
self.analyzeData(x)
def datafeed_in_all(self, device, packet):
"""
Callback type which writes all data into the array
:param device: device object
:param packet: data (String with binary data)
"""
data = ByteHelper.rawbytes(self.output.receive(packet))
if data:
# only using every second byte,
# because only every second contains the useful information.
self.all_data += data[1::2]
def datafeed_file(self, device, packet):
"""
Callback type which writes all data into a file
:param device: device object
:param packet: data (String with binary data)
"""
data = ByteHelper.rawbytes(self.output.receive(packet))
if data:
# only using every second byte,
# because only every second contains the useful information.
for x in data[1::2]:
self.file.write(str(x) + "\n")
def __init__(
self,
driver="fx2lafw",
sample_rate=100_000,
sample_count=1_000_000,
debug_output=False,
used_datafeed=datafeed_changes,
fake=False,
):
"""
:param driver: Driver that should be used
:param sample_rate: The sample rate of the Logic analyzer
:param sample_count: The sample count of the Logic analyzer
:param debug_output: Should be true if output should be displayed to user
:param used_datafeed: one of the datafeeds above, user later as callback.
:param fake:
"""
super(SigrokAPIInterface, self).__init__(sample_rate, sample_count)
if fake:
raise NotImplementedError("Not implemented!")
self.used_datafeed = used_datafeed
self.debug_output = debug_output
self.session = None
def forceStopMeasure(self):
"""
Force stopping the measurement
:return: None
"""
self.session.stop()
def runMeasure(self):
"""
Start the Measurement and set all settings
"""
context = sr.Context_create()
devs = context.drivers[self.driver].scan()
# print(devs)
if len(devs) == 0:
raise RuntimeError("No device with that driver found!")
sigrokDevice = devs[0]
if len(devs) > 1:
raise Warning(
"Attention! Multiple devices with that driver found! Using ",
sigrokDevice.connection_id(),
)
sigrokDevice.open()
sigrokDevice.config_set(ConfigKey.LIMIT_SAMPLES, self.sample_count)
sigrokDevice.config_set(ConfigKey.SAMPLERATE, self.sample_rate)
enabled_channels = ["D1"]
for channel in sigrokDevice.channels:
channel.enabled = channel.name in enabled_channels
self.session = context.create_session()
self.session.add_device(sigrokDevice)
self.session.start()
self.output = context.output_formats["binary"].create_output(sigrokDevice)
print(context.output_formats)
self.all_data = b""
def datafeed(device, packet):
self.used_datafeed(self, device, packet)
self.session.add_datafeed_callback(datafeed)
time_running = time.time()
self.session.run()
total_time = time.time() - time_running
print(
"Used time: ",
total_time * 1_000_000,
"µs | sample/s: ",
self.sample_count / (total_time),
"Hz ",
)
self.session.stop()
if self.debug_output:
# if self.used_datafeed == self.datafeed_in_change:
if True:
changes = [x / self.sample_rate for x in self.changes]
print(changes)
is_on = self.start == 0xFF
print("0", " - ", changes[0], " # Pin ", "HIGH" if is_on else "LOW")
for x in range(len(changes) - 1):
is_on = not is_on
print(
changes[x],
" - ",
changes[x + 1],
" / ",
changes[x + 1] - changes[x],
" # Pin ",
"HIGH" if is_on else "LOW",
)
elif self.used_datafeed == self.datafeed_in_all:
print(self.all_data)
|
