.:madworm:.'s photos with the keyword: serial

Polling date from a device via serial.

It seems to work. Now I only have to make the rest of the code live with it in peace. That doesn't work 100% right now. The LED driver interrupt gets upset sometimes. The entry points of the pin-change ISR are marked with double-pulses, sampling the data is marked by single pulses. Spikes 2-9: sampling the data byte, spike 1: start bit, spike 10: stop bit, spike 11: hmmmm ?!?

With 104µs the average bit time is pretty much on spec. A nice thing when running with a ceramic resonator. I had to tune the bit-delays to get there. The ATtiny85 unfortunately doesn't have a hardware UART.

The little insert is quite annoying. It simply doesn't want to move out of the way.

The question: is the ringing real? In this case it was caused by sin(x)/x interpolation. I was instantly suspicious as this effect only showed up at one zoom setting.

Is it useful? Maybe. I have a couple of existing projects that would benefit from a rotary knob, but not enough code-space is left to add encoder handling. Serial comms is already working, so this is the simpler way to make it work. A little quiz: {1,-1,0,-1,0,0,1,1,0,0,-1,0,-1,1,0}

Is it useful? Maybe. I have a couple of existing projects that would benefit from a rotary knob, but not enough code-space is left to add encoder handling. Serial comms is already working, so this is the simpler way to make it work. A little quiz: {1,-1,0,-1,0,0,1,1,0,0,-1,0,-1,1,0}