4 ms·

I did use JTAG from time to time during that period of my career, but it was not as often useful as one might hope, usually as you say due to timing issues. I g

I did use JTAG from time to time during that period of my career, but it was not as often useful as one might hope, usually as you say due to timing issues. I got really comfortable hooking up a serial port and streaming logs out at 9600 bps, or just clipping an LED or scope to a spare output and watching what it did. Then, sometimes it just didn't feel like it was worth the trouble of setting up the JTAG, when I knew I could turn it around in a minute with a simpler test.

PaulHoule 2y ago
That was where I was heading with my display controller, except the 9600 bps wasn't good enough, the serial connection wasn't so reliable so I was trying to make a really simple protocol like HLDC [1] but life got in the way. If I ever get back to the project (putting an LED sign on the side of my car such that you might see some hearts and stars and stuff if you looked at it the right way) I might try testing the display controller in an emulator or put the strip on a pendulum or something so I can get a picture of it doing its thing. [1] https://en.wikipedia.org/wiki/High-Level_Data_Link_Control https://en.wikipedia.org/wiki/High-Level_Data_Link_Control