Hi, I'm try to understand which can be the best way to interface all of the following element to the smoothie in order to have a custom LCD display.
SPI LCD: Graphic ST7565 Negative LCD (128x64) with RGB backlight
Encoder Pushbutton: EC11E153440D Alps
External SD Card: External SD Card board v1.1 from RepRapworld (or similar)
The configuration is very similar to RepRapDiscount Full Graphic Smart Controller and Panucatt Viki2, but using different hardware; I have all these material already, so I can test to interface it and subsequentely integrates all the elements in a dedicated panel.
What I understand is that I can split the SPI channel 1 used on the onboard microSD to the external SD, the first doubt is, which is the best idea:
1. Maintain the internal SD and add the external as second with a different CS pin
2. Use the external adaptor as main SD interface replacing the microSD (the reason for this is that I want to enclose the board into the structure of my printer, so the microsd will have difficult reach)
In case of first option, there is some "conflict" between the two cards, or anyway, sharing the same SPI can represent a performance problem when playing gcodes from SD? do you have some suggestion for the best architecture?
I think it is be possible to use as stand alone on SPI channel 0, but I don't figure out how to connect all the pins (apart backlit); is this configuration correct?
VDD -> 3.3V
GND -> GND
SID -> MOSI
/CS -> SSEL1
SCLK -> SCK1
/RST -> ??? (reset pin?)
A0 -> ??? (address pin?)
I think this is easy by interfacing to spare IO pins and configuring it in smoothieware
Thank you very much for the help,