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