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50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
#!/usr/bin/env python
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"""Test File generator.
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This tool generates a hex file, of given size, ending on address
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0xffff.
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USAGE: hen-ihex.py size_in_kilobyte
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The resulting Intel-hex file is output to stdout, use redirection
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to save the data to a file.
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"""
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#return a string with data in intel hex format
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def makeihex(address, data):
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out = []
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start = 0
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while start<len(data):
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end = start + 16
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if end > len(data): end = len(data)
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out.append(_ihexline(address, [ord(x) for x in data[start:end]]))
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start += 16
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address += 16
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out.append(_ihexline(address, [], end=1)) #append no data but an end line
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return ''.join(out)
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def _ihexline(address, buffer, end=0):
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out = []
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if end:
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type = 1
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else:
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type = 0
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out.append( ':%02X%04X%02X' % (len(buffer),address&0xffff,type) )
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sum = len(buffer) + ((address>>8)&255) + (address&255)
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for b in buffer:
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if b == None: b = 0 #substitute nonexistent values with zero
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out.append('%02X' % (b&255) )
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sum += b&255
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out.append('%02X\n' %( (-sum)&255))
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return ''.join(out)
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if __name__ == '__main__':
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import struct, sys
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if len(sys.argv) != 2:
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print __doc__
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sys.exit(1)
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size = int(sys.argv[1]) #in kilo
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startadr = 0x10000 - 1024*size
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data = ''.join([struct.pack(">H", x) for x in range(startadr, startadr+ 1024*size, 2)])
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print makeihex(startadr, data)
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