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")