polargraph_arduino/libraries/UTFT/hardware/arm/HW_MX20DX256.h

/**
 *
 * This file is a modified version of the HW_Teensy3.h created by Paul Stoffregen.
 *
 * Teensy 3.x pin definitions created by Dawnmist
 * http://forum.pjrc.com/threads/18002-Teensy-3-0-driving-an-SSD1289-with-utft?p=34719&viewfull=1#post34719
 *
 * This file only supports the B and D ports as defined by Dawnmist for 8-bit and 16-bit display modules.
 * Serial display modules are also supported.
 * 
 * NOTE: This file has only been tested on a Teensy 3.1
 *
**/

// *** Hardware specific functions ***
void UTFT::_hw_special_init()
{
}

void UTFT::LCD_Writ_Bus(char VH,char VL, byte mode)
{
	switch (mode)
	{
	case 1:
		if (display_serial_mode==SERIAL_4PIN)
		{
			if (VH==1)
				sbi(P_SDA, B_SDA);
			else
				cbi(P_SDA, B_SDA);
			pulse_low(P_SCL, B_SCL);
		}
		else
		{
			if (VH==1)
				sbi(P_RS, B_RS);
			else
				cbi(P_RS, B_RS);
		}

		if (VL & 0x80)
			sbi(P_SDA, B_SDA);
		else
			cbi(P_SDA, B_SDA);
		pulse_low(P_SCL, B_SCL);
		if (VL & 0x40)
			sbi(P_SDA, B_SDA);
		else
			cbi(P_SDA, B_SDA);
		pulse_low(P_SCL, B_SCL);
		if (VL & 0x20)
			sbi(P_SDA, B_SDA);
		else
			cbi(P_SDA, B_SDA);
		pulse_low(P_SCL, B_SCL);
		if (VL & 0x10)
			sbi(P_SDA, B_SDA);
		else
			cbi(P_SDA, B_SDA);
		pulse_low(P_SCL, B_SCL);
		if (VL & 0x08)
			sbi(P_SDA, B_SDA);
		else
			cbi(P_SDA, B_SDA);
		pulse_low(P_SCL, B_SCL);
		if (VL & 0x04)
			sbi(P_SDA, B_SDA);
		else
			cbi(P_SDA, B_SDA);
		pulse_low(P_SCL, B_SCL);
		if (VL & 0x02)
			sbi(P_SDA, B_SDA);
		else
			cbi(P_SDA, B_SDA);
		pulse_low(P_SCL, B_SCL);
		if (VL & 0x01)
			sbi(P_SDA, B_SDA);
		else
			cbi(P_SDA, B_SDA);
		pulse_low(P_SCL, B_SCL);
		break;
	case 8:
		*(volatile uint8_t *)(&GPIOD_PDOR) = VH;
		pulse_low(P_WR, B_WR);
		*(volatile uint8_t *)(&GPIOD_PDOR) = VL;
		pulse_low(P_WR, B_WR);
		break;
	case 16:
		*(volatile uint8_t *)(&GPIOD_PDOR) = VH;
  		GPIOB_PCOR = 0x000F000F;							// clear data lines B0-3,B16-19
        GPIOB_PSOR = (0x0F & VL) | ((VL >> 4) << 16);  		// set data lines 0-3,16-19 if set in cl
		pulse_low(P_WR, B_WR);
		break;
	}
}

void UTFT::_set_direction_registers(byte mode)
{
	GPIOD_PDDR |= 0xFF;
	PORTD_PCR0  = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
	PORTD_PCR1  = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
	PORTD_PCR2  = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
	PORTD_PCR3  = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
	PORTD_PCR4  = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
	PORTD_PCR5  = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
	PORTD_PCR6  = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
	PORTD_PCR7  = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);

	if (mode == 16)
    {
		GPIOB_PDDR |= 0x000F000F;
		PORTB_PCR0  = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
		PORTB_PCR1  = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
		PORTB_PCR2  = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
		PORTB_PCR3  = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
		PORTB_PCR16 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
		PORTB_PCR17 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
		PORTB_PCR18 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
		PORTB_PCR19 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
    }
}
void UTFT::_fast_fill_16(int ch, int cl, long pix)
{
	long blocks;

	*(volatile uint8_t *)(&GPIOD_PDOR) = ch;
  	GPIOB_PCOR = 0x000F000F;						// clear data lines B0-3,B16-19
    GPIOB_PSOR = (0x0F & cl) | ((cl >> 4) << 16);  	// set data lines 0-3,16-19 if set in cl

	blocks = pix/16;
	for (int i=0; i<blocks; i++)
	{
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);
	}
	if ((pix % 16) != 0)
		for (int i=0; i<(pix % 16); i++)
		{
			pulse_low(P_WR, B_WR);
		}
}

void UTFT::_fast_fill_8(int ch, long pix)
{
	long blocks;

	*(volatile uint8_t *)(&GPIOD_PDOR) = ch;

	blocks = pix/16;
	for (int i=0; i<blocks; i++)
	{
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
	}
	if ((pix % 16) != 0)
		for (int i=0; i<(pix % 16); i++)
		{
			pulse_low(P_WR, B_WR);pulse_low(P_WR, B_WR);
		}
}