Add diagnostics_rx_error_summarizer.py for rx error confirmation

[Kanazawanaoaki]

I would like to add a program based on an existing program by @kosuke55 to jsk_robot in order to check which device is causing the error when the rx error occurs as reported by #1671 and #794

When executed without arguments, only devices with errors are displayed and the results are saved to a csv file. The --unsave argument eliminates saving to the csv file, and --show_all_ports outputs the results of all ports to stdout.

$ rosrun jsk_pr2_startup diagnostics_rx_error_summarizer.py
0
[Devices with errors]
1679040592 : /Motors/EtherCAT Device #00 (WG014) RX Error Port 0: 103
--------------------------------------------
1
[Devices with errors]
1679040593 : /Motors/EtherCAT Device #00 (WG014) RX Error Port 0: 103
--------------------------------------------
2
[Devices with errors]
1679040594 : /Motors/EtherCAT Device #00 (WG014) RX Error Port 0: 103
--------------------------------------------
3
[Devices with errors]
1679040595 : /Motors/EtherCAT Device #00 (WG014) RX Error Port 0: 103
--------------------------------------------

[708yamaguchi]

Thanks for the nice script.
I am able to use this script with pr1012 today and there seems no problems.

It would be helpful if you could give a timestamp or number of attempts in the stdout of this script.

[708yamaguchi]

@Kanazawanaoaki
I think that timestamps and graph drawing functions are important to know when packet drops occur.
So it would be great if we could output csv or draw graphs by default.

[nakane11]

I think only timestamps are written into csv now.

Suggested change

	self.values.append(v.value)
	self.values.append(v.value)

I would appreciate it if the timestamp is displayed on stdout, too.

[Kanazawanaoaki]

Thanks for your comments. I have updated the default to save to a csv file, to save more than just the timestamp in the csv, and to display the timestamp in the stdout as well.