Neato XV-11: Difference between revisions
| Line 430: | Line 430: | ||
for t in range(10): | for t in range(10): | ||
data_list.append( data2*t + (data2*t+1<<8) ) | data_list.append( data2*t + (data2*t+1<<8) ) | ||
# compute the checksum on 32 bits | # compute the checksum on 32 bits | ||
chk32 = 0 | chk32 = 0 | ||
for d in data_list: | for d in data_list: | ||
chk32 = (chk32 << 1) + d | chk32 = (chk32 << 1) + d | ||
# return a value wrapped around on 15bits, and truncated to still fit into 15 bits | # return a value wrapped around on 15bits, and truncated to still fit into 15 bits | ||
checksum = (chk32 & 0x7FFF) + ( chk32 >> 15 ) # wrap around to fit into 15 bits | checksum = (chk32 & 0x7FFF) + ( chk32 >> 15 ) # wrap around to fit into 15 bits | ||