Raspberry Pi

[Robin Hewitt]

I have a buffer of straight lines. Lines currently are 24 bits long max. With the acceleration/deceleration/directions included I can define a straight line, XYZ, in 12 bytes.

I pinched the idea, I won't say where from. It also makes jogging easy but the buffer needs canny attention after you hit pause because unexpected braking has to become unexpected acceleration when you unpause.

I put a tidemark at 800 lines, if the buffer drops below that it gets another 10 lines. Drip feeding from the host may not be the way you want to go.

I use 2 interrupts, one for the stepping, one for the comms.

I have one bug at the mo', if the host misses a byte from the status report it waits forever for it to arrive. I need to add a timeout/retry. I haven't lost any data going the other way, yet, touch wood.

Edit: You step at .05mm? Is that a typo? I step at .005mm.