We used a quite fancy digital oscilloscope in reverse engineering laboratory. Outside lab, I should find better way to recover my poor learning skills. Honestly, I am not a hardware guy, thus there were always tons of trial errors whenever playing with Beagle Bone. Fortunately, now I found out how to connect USB to TTL serial cable and how to display frequency on the alternative oscilloscope.
Make stable connections with BBB
Fist thing first, we need to connect BBB to PC with regular USB cable.
There is a trick. When BBB is connected to PC, 4 blue LEDs will be blinking simultaneously. As soon as it stops blinking, make USB to TTL cable plugged into serial debug slot. First slot is GND, fourth is TX and firth is RX. Safe option is to push reset button in any unusual cases.
Base terminal application
I have been using the Screen for Raspberry Pi but Minicom is much better for BBB since it can modify some communication options like hardware flow control.
Just make same configuration on Minicom by using
minicom -s option then save setup as dfl. Serial device location can be found inside
PC based digital oscilloscope
Only thing that I needed to know it how to recap my hands-on exercises. There were bunch of USB digital oscilloscope, but I chose Hantek since it was most cost-effective product in market. If I have enough budget, I would buy the Analog Discovery 2 USB Oscilloscope. Alternatively, I believe Hantek PC Based USB Digital Storage Oscilloscope 6022BE seems to be enough for my purpose. This article was quite helpful: Top 7 PC-based USB oscilloscopes of 2017: for hobbyists, makers, and pros