Problem with SDO Block Transfer (+workaround) #618
Description
Hi, if i try a SDO download with block transfer like in the docs, but without crc, i.e.
FIRMWARE_PATH = '/path/to/firmware.bin'
FILESIZE = os.path.getsize(FIRMWARE_PATH)
with open(FIRMWARE_PATH, 'rb') as infile,
node.sdo['Firmware'].open('wb', size=FILESIZE, block_transfer=True, request_crc_support=False) as outfile:
# Iteratively transfer data without having to read all into memory
while True:
data = infile.read(1024)
if not data:
break
outfile.write(data)
the transfer ends after one or two sub blocks. The last SDO from the client has the invalid payload=DD 00 00 00 00 00 00 00. The transfer is working without the 1024 chunk. Just use data = infile.read() or a chunk size of 7*1024.