I am working on a school project. I want to use two Nokia 5110 LCD screens to use as interactive eyes for a robot.
I am using an arduino DUE as microcontroller, just so that the screens run smoothly on 3.3V. I am able to send the same bitmap-data to both of the screens over the chip-select dataline. But I can't figure out how to send seperate data-sets to both screens at the same time.
I am reading in about SPI, note: I am a novice when it comes to electronics. But it seems to me that you can only send data to one slave at the time. I don't know what the speed is that I can write to the LCD screens is while using the SPI-bus, as the refresh-rate has to be similair in both eyes.
Does anybody have a good tutorial about sending different data to multiple slaves with an arduino DUE, as I read that SPI on a DUE works differently than on AVR-based boards. I do have an UNO and a Mega and some level shifting chips, if it is too difficult to work out with an Arduino DUE.
Thanks in advance! :)