FreeDATA/test/README.md

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# TESTS
## TEST_TX.py --> Send string "TEST"
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```
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./TEST_TX.py | ./freedv_data_raw_rx DATAC3 - - | hexdump -C
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```
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Output should be:
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```
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payload bytes_per_modem_frame: 30
00000000 54 45 53 54 00 00 00 00 00 00 00 00 00 00 00 00 |TEST............|
modem bufs processed: 22 output bytes: 30 output_frames: 1
00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |..............|
0000001e
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```
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./TEST_TX.py | ./freedv_data_raw_rx DATAC3 - -
###################### CHECKSUM COMPARISON FREEDV VS CRCENGINE ########
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#https://crccalc.com
teststring = b'TEST'
# freedv crc16 checksum
crctest2 = c_ushort(self.c_lib.freedv_gen_crc16(teststring, len(teststring)))
print("FREEDV2: " + str(crctest2.value) + " = " + hex(crctest2.value))
#Python crc16 checksum
crc_algorithm = crcengine.new('crc16-ccitt-false') #load crc16 library
crctest3 = crc_algorithm(teststring)
print("CRCENGINE: " + str(crctest3) + " = " + hex(crctest3))
#######################################################################