basic_eve_demo.c

#ifdef _MSC_VER
# include <conio.h>
#endif
#include "Eve2_81x.h"
#include "hw_api.h"
#include "MatrixEve2Conf.h"

//MakeScreen_MatrixOrbital draws a blue dot in the center screen, along
//with the text "MATRIX ORBITAL"
void MakeScreen_MatrixOrbital(uint8_t DotSize)
{
	Send_CMD(CMD_DLSTART);                   //Start a new display list
	Send_CMD(VERTEXFORMAT(0));               //setup VERTEX2F to take pixel coordinates
	Send_CMD(CLEAR_COLOR_RGB(0, 0, 0));      //Determine the clear screen color
	Send_CMD(CLEAR(1, 1, 1));	               //Clear the screen and the curren display list
	Send_CMD(COLOR_RGB(26, 26, 192));        // change colour to blue
	Send_CMD(POINT_SIZE(DotSize * 16));      // set point size to DotSize pixels. Points = (pixels x 16)
	Send_CMD(BEGIN(POINTS));                 // start drawing point
	Send_CMD(TAG(1));                        // Tag the blue dot with a touch ID
	Send_CMD(VERTEX2F(Display_Width() / 2, Display_Height() / 2));     // place blue point
	Send_CMD(END());                         // end drawing point
	Send_CMD(COLOR_RGB(255, 255, 255));      //Change color to white for text
	Cmd_Text(Display_Width() / 2, Display_Height() / 2, 30, OPT_CENTER, " MATRIX         ORBITAL"); //Write text in the center of the screen
	Send_CMD(DISPLAY());                     //End the display list
	Send_CMD(CMD_SWAP);                      //Swap commands into RAM
	UpdateFIFO();                            // Trigger the CoProcessor to start processing the FIFO
}


// A calibration screen for the touch digitizer 
void Calibrate(void)
{
	Calibrate_Manual(Display_Width(), Display_Height(), Display_VOffset(), Display_HOffset());
}

// A Clear screen function 
void ClearScreen(void)
{
	Send_CMD(CMD_DLSTART);
	Send_CMD(CLEAR_COLOR_RGB(0, 0, 0));
	Send_CMD(CLEAR(1, 1, 1));
	Send_CMD(DISPLAY());
	Send_CMD(CMD_SWAP);
	UpdateFIFO();                            // Trigger the CoProcessor to start processing commands out of the FIFO
	Wait4CoProFIFOEmpty();                   // wait here until the coprocessor has read and executed every pending command.		
	HAL_Delay(10);
}

int main()
{
	FT81x_Init(DISPLAY_101, BOARD_EVE3, TOUCH_TPN); //Initialize the EVE graphics controller. 
	ClearScreen();	                                //Clear any remnants in the RAM
	if (Display_Touch() == TOUCH_TPR)
	{
		Calibrate();
	}

	MakeScreen_MatrixOrbital(30);                   //Draw the Matrix Orbital Screen
	uint8_t pressed = 0;

	while (1)
	{
#ifdef _MSC_VER
		if (_kbhit())
			break;
#endif
		uint8_t Tag = rd8(REG_TOUCH_TAG + RAM_REG);  //Check for touches
		switch (Tag)
		{
			case 1:
				if (!pressed)
				{
					MakeScreen_MatrixOrbital(120); //Blue dot is 120 when touched
					pressed = 1;
				}
				break;
			default:
				if (pressed)
				{
					pressed = 0;
					MakeScreen_MatrixOrbital(30); //Blue dot size is 30 when not touched
				}
				break;
		}		
	}
	HAL_Close();
}