Simple serial tester ~~~~~~~~~~~~~~~~~~~~~~ Usage: - Create a random file. dd if=/dev/urandom of=binary count=1 bs=4096 - Copy the random file to both nodes. - Start the test receiving node: serialcheck -d /dev/ttyS0 -f binary -m r -l 10 sending node: serialcheck -d /dev/ttyUSB0 -f binary -m t -l 10 Start the receiving side before the sending side. This will transfer the "binary" file 10 times and the other side will expect the file 10 times. Once the program completes both sides should write something similar to | Needed 0 reads 1 writes loops 10 / 10 | cts: 0 dsr: 0 rng: 0 dcd: 0 rx: 0 tx: 40960 frame 0 ovr 0 par: 0 brk: 0 buf_ovrr: 0 and in error case the receive side: Needed 20 reads 0 writes Oh oh, inconsistency at pos 2273 (0x8e1). Original sample: 000008b0: 28 b2 18 c9 ec b5 2c b3 3a a1 29 b1 fc 27 20 7f (.....,.:.)..' . 000008c0: 42 f8 d5 cb d8 52 ec b5 c8 76 d3 4b d2 57 44 6a B....R...v.K.WDj 000008d0: 40 81 6a 82 27 fd 8d 50 84 70 bc 24 6b 3d 88 fd @.j.'..P.p.$k=.. 000008e0: 9f ac 78 a4 76 9b f9 1c 74 2c d6 79 22 60 c5 de ..x.v...t,.y"`.. 000008f0: 02 9c fb 52 21 4b 40 6f 80 69 2e 80 df 12 ba a0 ...R!K@o.i...... 00000900: 75 57 d5 22 33 c0 f3 bc 94 f8 aa 22 9d 02 59 20 uW."3......"..Y Received sample: 000008b0: 28 b2 18 c9 ec b5 2c b3 3a a1 29 b1 fc 27 20 7f (.....,.:.)..' . 000008c0: 42 f8 d5 cb d8 52 ec b5 c8 76 d3 4b d2 57 44 6a B....R...v.K.WDj 000008d0: 40 81 6a 82 27 fd 8d 50 84 70 bc 24 6b 3d 88 fd @.j.'..P.p.$k=.. 000008e0: 9f 00 ac 78 a4 76 9b f9 1c 74 2c d6 79 22 60 c5 ...x.v...t,.y"`. 000008f0: de 02 9c fb 52 21 4b 40 6f 80 69 2e 80 df 12 ba ....R!K@o.i..... 00000900: a0 75 57 d5 22 33 c0 f3 bc 94 f8 aa 22 9d 02 59 .uW."3......"..Y loops 54878 / 4294967295 cts: 0 dsr: 0 rng: 0 dcd: 0 rx: 224792017 tx: 223379456 frame 0 ovr 1 par: 0 brk: 0 buf_ovrr: 0 Problems: ~~~~~~~~~ - Option -m d for duplex does not work It sends data before the receiver is ready. As a workaround invoke it twice (r and t mode). - The sender does not notice that it is no longer synchronized.