mirror of
https://github.com/travisgoodspeed/goodwatch
synced 2024-11-22 16:59:57 +00:00
84 lines
2.4 KiB
Python
Executable File
84 lines
2.4 KiB
Python
Executable File
#!/usr/bin/python2
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## This quick and dirty tool converts a textfile of frequencies and
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## names into a GoodWatch codeplug, for storage in information flash
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## at 0x1800. Use cc430-bsl.py to write the codeplug to flash.
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import sys, argparse;
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def freqbytes(freq):
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"""Converts a frequency to three FREQ bytes. Assumes 26MHz xtal."""
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freqMult = (0x10000 / 1000000.0) / 26.0;
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num=int(freq*1e6*freqMult);
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FREQ2=(num>>16) & 0xFF;
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FREQ1=(num>> 8) & 0xFF;
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FREQ0= num & 0xFF
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return FREQ2, FREQ1, FREQ0;
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def ihexcrc(hexline):
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"""Calculates an Intel Hex CRC of a line."""
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#%print("Calculating CRC of %s."%hexline);
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CRC=0;
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for b in hexline:
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CRC=CRC+ord(b);
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CRC=CRC^0xFF;
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CRC=CRC+1;
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return CRC&0xFF;
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codeplugadr=0x1800;
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def handleline(line):
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"""Handles one line of the file."""
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global codeplugadr;
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if len(line)==0: #Empty line.
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return;
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elif line[0]=='#': #Comment
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return;
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else:
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# This is a real line. First word ought to be the frequency,
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# and the second word ought to be the name (8 characters or
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# less). Further words would be flags, but we ignore them for
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# now.
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LEN=12;
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words=line.split();
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freq=float(words[0]);
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name=words[1];
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namehex=name.encode('hex');
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assert(len(name)<=8);
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while len(namehex)<16:
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namehex='20'+namehex;
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FLAGS=0;
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(FREQ2, FREQ1, FREQ0) = freqbytes(freq);
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line="%02x%04x00%02x%02x%02x%02x%s" %(
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LEN, codeplugadr, FLAGS, FREQ2,FREQ1,FREQ0, namehex
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);
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CRC=ihexcrc(line.decode("hex"));
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codeplugadr=codeplugadr+12;
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return ":%s%02x\n" % (line, CRC);
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def convertcodeplug(infile, outfile):
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"""Converts a codeplug textfile into an intel hex file for flashing."""
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i=open(infile,'r');
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o=open(outfile,'w');
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for line in i:
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ihl=handleline(line.strip());
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if(ihl!=None):
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o.write(ihl);
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o.write(":00000001FF\n");
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i.close();
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o.close();
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if __name__=='__main__':
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parser = argparse.ArgumentParser(description='GoodWatch Codeplug Compiler')
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parser.add_argument('-i','--input', help='Input Textfile');
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parser.add_argument('-o','--output', help='Output Intel Hex File');
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args=parser.parse_args();
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if args.input!=None and args.output!=None:
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convertcodeplug(args.input, args.output);
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