7-segment display MAX72XX SPI Hardware
First of all thanks for a very solid firmware. I have build a CoreXY printer and the goal is to print ABS and nylon with good results. I have the printer connected to a computer overtime so no need for a SD card but would like to have some easy feedback on what's going on with the printer. The common LCD UI is not the best way to get the basic feedback from a distance.
My approach is to use 7-segment displays to show just the different temperatures to start with. There are nice 8 digit 7-segment SPI displays on ebay and by using just two of them I would like to show temp for dual extruders, heat bed and the heated cabinet.
One big goal is to not mess around to much with the firmware. As I see it there are two ways to do this.
1. Write a new UI in the firmware
2. Just sniff the coms and use a second microprocessor to do the 7-segment part
After taking a walk in the firmware code I would not go for writing new UI. Even if a lot of the code is there. It is nested around a lot and for me to make it decent compatible with all of the different configurations would take a while for even a basic codewriter. I'm not :-)
That leaves me with sniffing the TX/RX and by doing that I would gain a higher compatibility for different firmwares and protocols.
If I can add a second microprocessor that sniffs TX/RX it easy to implement some RGB leds for feedback on different states on the printer later on
Is this approach the best one ?
And if so I need help with to start with is a good entry point. Repetier uses a bin protocol. Where to get the more deep info on that ?