ltv.c

Lido PXA270平台开发板的最新BSP,包括源代码

#include "xllp_gpio.h"

/*
CS   GPIO100
CLK  GPIO101
SDI  GPIO102
RST  GPIO103
*/
volatile XLLP_GPIO_T *pGPIORegs;
extern void usWait(unsigned usVal);

/*拉低CS，使得SPI有效*/
void enable_CS()
{
	pGPIORegs->GPSR3 &= ~XLLP_BIT_4;
	pGPIORegs->GPCR3 |= XLLP_BIT_4;
	return;
}

/*拉高CS，使得SPI有效*/
void disable_CS()
{
	pGPIORegs->GPSR3 |= XLLP_BIT_4;
	return;
}
 
void clk_HIGH()
{
	pGPIORegs->GPSR3 |= XLLP_BIT_5;
	return;
}
 
void clk_LOW()
{
	pGPIORegs->GPSR3 &= ~XLLP_BIT_5;
	pGPIORegs->GPCR3 |= XLLP_BIT_5;
	return;
}
 
void sdi_HIGH()
{
	pGPIORegs->GPSR3 |= XLLP_BIT_6;
	return;
}
 
void sdi_LOW()
{
	pGPIORegs->GPSR3 &= ~XLLP_BIT_6;
	pGPIORegs->GPCR3 |= XLLP_BIT_6;
	return;
}

void spi_WRITE(int mode, unsigned short data)
{
    unsigned long tmp;
    int i;
    
    if (mode) //addr
     	tmp = (0x74)<<16 | data;
    else     //instruction
     	tmp = (0x76)<<16 | data;

	enable_CS(); 
	usWait(10);
    
    //write 
    for(i = 0 ; i < 24; i++)
    {
		usWait(10);
		clk_LOW();
		usWait(20);
		if(tmp&0x800000)
			sdi_HIGH();
		else
			sdi_LOW();
		usWait(10);
		tmp <<=1;
		clk_HIGH();
    } 
    disable_CS();
}

void ltv_LCD_reset()
{
    /*set reset pin low width >= 3 us*/
    pGPIORegs->GPSR3 &= ~XLLP_BIT_7;
    pGPIORegs->GPCR3 |= XLLP_BIT_7;	
    usWait(10);
    pGPIORegs->GPSR3 |= XLLP_BIT_7;	
}

void ltv_GPIO_init()
{
	/* set gpio output level */
	// spi cs pin: 100 high
	pGPIORegs->GPSR3 |= XLLP_BIT_4;
	// spi clk pin: 101 low
	pGPIORegs->GPSR3 &= ~XLLP_BIT_5;
	pGPIORegs->GPCR3 |= XLLP_BIT_5;
	// spi data pin: 102 low
	pGPIORegs->GPSR3 &= ~XLLP_BIT_6;
	pGPIORegs->GPCR3 |= XLLP_BIT_6;
    // lcd reset pin: 103 high
    pGPIORegs->GPSR3 |= XLLP_BIT_7;

	/* set gpio direction: output*/
	pGPIORegs->GPDR3 |= XLLP_BIT_4 | XLLP_BIT_5 | XLLP_BIT_6 | XLLP_BIT_7;
}

void ltv_LCD_init(	volatile XLLP_GPIO_T *p_GPIORegs)
{
	pGPIORegs = p_GPIORegs;
    	
	ltv_GPIO_init();

	usWait(5000);

	ltv_LCD_reset();

	spi_WRITE(1,0x09);
	spi_WRITE(0,0x0000);

	usWait(10000);

	spi_WRITE(1,0x09);
	spi_WRITE(0,0x4000);

	spi_WRITE(1,0x0a);
	spi_WRITE(0,0x2000);

	usWait(10);
	spi_WRITE(1,0x09);
	spi_WRITE(0,0x4055);

	usWait(50000);

	//something setting
	/*set interface mode syn mode:0x409d, de mode:0x609d*/
	spi_WRITE(1,0x01);
	spi_WRITE(0,0x409d);

	/*set data format RGB*/
	spi_WRITE(1,0x02);
	spi_WRITE(0,0x0204);

	spi_WRITE(1,0x03);
	spi_WRITE(0,0x100);

	spi_WRITE(1,0x04);
	spi_WRITE(0,0x3000);

	spi_WRITE(1,0x05);
	spi_WRITE(0,0x4003);

	spi_WRITE(1,0x06);
	spi_WRITE(0,0x0022);

	spi_WRITE(1,0x07);
	spi_WRITE(0,0x0021);

	spi_WRITE(1,0x08);
	spi_WRITE(0,0x0c00);

	spi_WRITE(1,0x10);
	spi_WRITE(0,0x0103);

	spi_WRITE(1,0x11);
	spi_WRITE(0,0x0301);

	spi_WRITE(1,0x12);
	spi_WRITE(0,0x1f0f);

	spi_WRITE(1,0x13);
	spi_WRITE(0,0x1f0f);

	spi_WRITE(1,0x14);
	spi_WRITE(0,0x0707);

	spi_WRITE(1,0x15);
	spi_WRITE(0,0x0307);

	spi_WRITE(1,0x16);
	spi_WRITE(0,0x0707);

	spi_WRITE(1,0x17);
	spi_WRITE(0,0x0000);

	spi_WRITE(1,0x18);
	spi_WRITE(0,0x0004);

	spi_WRITE(1,0x19);
	spi_WRITE(0,0x0000);

	usWait(12000); 

	spi_WRITE(1,0x09);
	spi_WRITE(0,0x4a55);

	spi_WRITE(1,0x05);
	spi_WRITE(0,0x5003); 
	usWait(100);

 	return;
}