- Clear the handwriting area at initial startup
- Press the "Open" button to open the previous "Save" screen
- Press the "Save" button to save the current screen to SDRAM
- Press the "Clear" button to clear the handwriting area
- After pressing the color button, the handwriting color changes to this color,
- The default color is black
- EVB: STM32f746g-DISCOVERY
- IDE: keil5 with MXcube
- download keil and compiler project
- load into the STM32f746g-DISCOVERY