SPI is somewhat similar but you need a hardware CS for each device. Lcd.print("Hello Gil!") // Print a message to the LCD. Lcd.setCursor(0,0) // Point cursor to row 0 column 0 This actually would allow up to 8 displays. Each display on the I2C buss needs initializing but no additional pins required. the third parameter is how many lines are on your screen the second parameter is how characters per row are on your screen the first parameter is the I2C address (0x27) LiquidCrystal_I2C lcd(0x26,16,2) // set the LCD address to 0x26 for a 16 chars a line and 2 line display LiquidCrystal_I2C lcd(0x27,20,4) // set the LCD address to 0x27 for a 20 chars a line and 4 line display Defining pin numbers is dependent on the library you are using. Same for the SPI except the select (CS) pins. Hi, I am looking for a PCB schematic of Arduino Mega 2560 Rev3 (preferably something I can open in Circuit Maker). Just a hint, all the I2C devices connect on the same two pins. Right now I'm just trying to see if this idea will even work. The SPI pins are also broken out on the ICSP header, which is physically compatible with the Uno, Duemilanove and Diecimila. I thought I would review the examples for the touch screen and go from there. NOTE: I haven't figured out the code part yet, which is why I haven't included it. (I saw on previous forums that there is a way to connect the two have the Uno as the master and the mega as the slave) Should I use the Uno for the Touch screen shield, and the mega for the LED panel? (So that I can fit the touch screen shield onto the mega and still have enough pins for the LED panel)ĭo I have to change the pins in the libraries or can that be done in the sketch/program code? Is it possible to change the pins that the LED panel requires? The shield covers digital pins 9-11, and analog pins A0-A3 - which the LED panel needs. If I put the Touch screen shield onto the Mega, I need to change some of the pins for the LED panel. Connect the device to the Serial1 pins on the Mega (18 and 19) with Tx from the device going to Rx on the Mega and vice versa. If I put the Touch screen shield onto the UNO, there are no pins left for the LED panel. A byte transmitted by the device need to be received by the Arduino and vice versa hence my suggested use of pins in reply 1. I have tested each device and they all work normally. I have downloaded the correct libraries for each device. My project is this: I want to click on a button on a touch screen, and have a pattern run on a LED panel.ġx Adafruit 2.8" TFT Touch Shield for Arduino with Resistive Touch Screen ( Overview | Adafruit 2.8" TFT Touch Shield v2 - Capacitive or Resistive | Adafruit Learning System)ġx Adafruit 32x32 RGB LED matrix panel ( Overview | 32x16 and 32x32 RGB LED Matrix | Adafruit Learning System)ġ large solder-less breadboard, 1 small solder-less breadboard, jumper wires, OM meter and other assorted electronic paraphernalia. I'm a college student and this is my first year dealing with micro controllers and electronics. Hi, I'm hoping I posted this in the right place.
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