Development Platform
The development platform used for this project is a GroundStudio Jade M1 Board, featuring an ATMega 2560. The Board runs at a frequency of 16MHz, but this is enough for this project.
It offers generous resources for a embedded applications and for this project we made use of the ADC, SPI controller and many GPIO pins for buttons and display control.
| Pin | Function | Description |
|---|---|---|
| PD0 | Cursor Left | Moves the cursor to the previous recorded point |
| PD1 | Cursor Right | Moves the cursor to the next recorded point |
| PD2 | Touch IRQ | Pin used for Touchscreen ISR |
| PD3 | Voltage Toggle | Toggles between High Voltage and Low Voltage |
| PE3 | Start Button | Enables the ADC and starts the system |
| PB4 | Display DC | Data/Control Pin for the display |
| PB5 | Display Reset | Pin used for Display Reset |
| PB6 | Display CS | Display Chip Select Pin used to signal SPI communication to the display |
| PB7 | Touchscreen CS | Touchscreen Chip Select Pin used to signal SPI communication with the XPT2046 |
| PF0 | ADC Input | Channel 0 for the board's ADC used as Voltmeter Input |
| PB1 | SPI SCK | Clock Pin for SPI communication |
| PB2 | SPI MOSI | MOSI Pin for SPI communication |
| PB3 | Touchscreen MISO | MISO Pin used by XPT2046 |
Perf Board
For the hardware part, it is recomended to solder the components to a Perf Board. This is a schematic to use for placing the components.
