litex/misoclib/tools/litescope/software/dump/sigrok.py

151 lines
4.2 KiB
Python

import os
import math
import shutil
import zipfile
import re
from collections import OrderedDict
from misoclib.tools.litescope.software.dump import *
class SigrokDump(Dump):
def __init__(self, init_dump=None, samplerate=50000000):
Dump.__init__(self)
if init_dump:
self.vars = init_dump.vars
self.samplerate = samplerate
def write_version(self):
f = open("version", "w")
f.write("1")
f.close()
def write_metadata(self, name):
f = open("metadata", "w")
r = """
[global]
sigrok version = 0.2.0
[device 1]
driver = litescope
capturefile = logic-1
unitsize = 1
total probes = {}
samplerate = {} KHz
""".format(
len(self.vars),
self.samplerate//1000,
)
for i, var in enumerate(self.vars):
r += "probe{} = {}\n".format(i+1, var.name)
f.write(r)
f.close()
def write_data(self):
# XXX are probes limited to 1 bit?
data_bits = math.ceil(len(self.vars)/8)*8
data_len = 0
for var in self.vars:
data_len = max(data_len, len(var))
datas = []
for i in range(data_len):
data = 0
for j, var in enumerate(reversed(self.vars)):
data = data << 1
try:
data |= var.values[i] % 2
except:
pass
datas.append(data)
f = open("logic-1", "wb")
for data in datas:
f.write(data.to_bytes(data_bits//8, "big"))
f.close()
def zip(self, name):
f = zipfile.ZipFile(name + ".sr", "w")
os.chdir(name)
f.write("version")
f.write("metadata")
f.write("logic-1")
os.chdir("..")
f.close()
def write(self, filename):
name, ext = os.path.splitext(filename)
if os.path.exists(name):
shutil.rmtree(name)
os.makedirs(name)
os.chdir(name)
self.write_version()
self.write_metadata(name)
self.write_data()
os.chdir("..")
self.zip(name)
shutil.rmtree(name)
def unzip(self, filename, name):
f = open(filename, "rb")
z = zipfile.ZipFile(f)
if os.path.exists(name):
shutil.rmtree(name)
os.makedirs(name)
for file in z.namelist():
z.extract(file, name)
f.close()
def read_metadata(self):
probes = OrderedDict()
f = open("metadata", "r")
for l in f:
m = re.search("probe([0-9]+) = (\w+)", l, re.I)
if m is not None:
index = int(m.group(1))
name = m.group(2)
probes[name] = index
m = re.search("samplerate = ([0-9]+) kHz", l, re.I)
if m is not None:
self.samplerate = int(m.group(1))*1000
m = re.search("samplerate = ([0-9]+) mHz", l, re.I)
if m is not None:
self.samplerate = int(m.group(1))*1000000
f.close()
return probes
def read_data(self, name, nprobes):
datas = []
f = open("logic-1", "rb")
while True:
data = f.read(math.ceil(nprobes/8))
if data == bytes('', "utf-8"):
break
data = int.from_bytes(data, "big")
datas.append(data)
f.close()
return datas
def read(self, filename):
self.vars = []
name, ext = os.path.splitext(filename)
self.unzip(filename, name)
os.chdir(name)
probes = self.read_metadata()
datas = self.read_data(name, len(probes.keys()))
os.chdir("..")
shutil.rmtree(name)
for k, v in probes.items():
probe_data = []
for data in datas:
probe_data.append((data >> (v-1)) & 0x1)
self.add(Var(k, 1, probe_data))
if __name__ == '__main__':
dump = SigrokDump()
dump.add(Var("foo1", 1, [0, 1, 0, 1, 0, 1]))
dump.add(Var("foo2", 2, [1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0]))
ramp = [i%128 for i in range(1024)]
dump.add(Var("ramp", 16, ramp))
dump.write("dump.sr")
dump.read("dump.sr")
dump.write("dump_copy.sr")