touch.c

ucosii和ucgui移植到LPC1788上

/************************************************************************************
								 	优龙科技
								 www.ucdragon.cn
								 	By -- yj;
								 	  V1.0

*************************************************************************************/
#include "LPC177x_8x.h"                          /* LPC17xx definitions */
#include "lpc177x_8x_adc.h"
#include "includes.h"
#include "touch.h"
#include "GUI_X.h"
#include "LCDConf.h"

unsigned char tmp=0;
unsigned short x_vaule = 0, y_vaule = 0;            /* Globals used for display */
 /*----------------------------------------------------------------------------
  initialize TOUCH Pins
 *----------------------------------------------------------------------------*/
void touch_init(void){

	 ADC_Init(LPC_ADC, 400000);

	 LPC_IOCON -> P0_12 = IO_Pull_up;		//P0.12 set gpio pullup
	 LPC_GPIO0 -> DIR  &= ~(0x1<<XR);	//P0.12 input
	
	 LPC_IOCON -> P0_23	= IO_No_UD;
	 LPC_GPIO0 -> DIR  &= ~(0x1<<XL);	//P0.23 input

	 LPC_IOCON -> P0_24 = IO_Pull_up;	//P0.24 set gpio pullup
	 LPC_GPIO0 -> DIR  |= (0x1<<YD);	//P0.24 output dir
	 LPC_GPIO0 -> CLR  |= (0x1<<YD);	//P0.24 output 0
	
	 LPC_IOCON -> P0_25 = IO_Pull_up;	//P0.25 set gpio pullup
	 LPC_GPIO0 -> DIR  |= (0x1<<YU);	//P0.25 output dir
	 LPC_GPIO0 -> CLR  |= (0x1<<YU);	//P0.25 output 0
	 GUI_X_Delay(10);

}
 /*----------------------------------------------------------------------------
  config the X  Pins for touch
 *----------------------------------------------------------------------------*/
void config_pins_x(void){

	 LPC_IOCON -> P0_25 = IO_No_UD;		//P0.25 set gpio no pullup and no pulldown
	 LPC_GPIO0 -> DIR  &= ~(0x1<<YU);	//P0.25 input
	
	 LPC_IOCON -> P0_24 = ADC_In;		//P0.24 set gpio pullup
	
	 LPC_IOCON -> P0_23 = IO_Pull_up;	//P0.23 set gpio pullup
	 LPC_GPIO0 -> DIR  |= (0x1<<XL);	//P0.23 output dir
	 LPC_GPIO0 -> CLR  |= (0x1<<XL);	//P0.23 output 0
	
	 LPC_IOCON -> P0_12 = IO_Pull_up;	//P0.12 set gpio pullup
	 LPC_GPIO0 -> DIR  |= (0x1<<XR);	//P0.12 output dir
	 LPC_GPIO0 -> SET  |= (0x1<<XR);	//P0.12 output 1
	 GUI_X_Delay(10);

}

/*----------------------------------------------------------------------------
  config the Y  Pins for touch
 *----------------------------------------------------------------------------*/
void config_pins_y(void){
	 LPC_IOCON -> P0_12 = IO_No_UD;		//P0.12 set gpio no pullup and no pulldown
	 LPC_GPIO0 -> DIR  &= ~(0x1<<XR);	//P0.12 input
	
	 LPC_IOCON -> P0_23 = ADC_In;		//P0.23 set gpio pullup
	
	 LPC_IOCON -> P0_24 = IO_Pull_up;	//P0.24 set gpio pullup
	 LPC_GPIO0 -> DIR  |= (0x1<<YD);	//P0.24 output dir
	 LPC_GPIO0 -> SET  |= (0x1<<YD);	//P0.24 output 1
	
	 LPC_IOCON -> P0_25 = IO_Pull_up;	//P0.25 set gpio pullup
	 LPC_GPIO0 -> DIR  |= (0x1<<YU);	//P0.25 output dir
	 LPC_GPIO0 -> CLR  |= (0x1<<YU);	//P0.25 output 0
	 GUI_X_Delay(10);

}

/*----------------------------------------------------------------------------
  read the x position
 *----------------------------------------------------------------------------*/
 unsigned short read_ch_x(void){

 	uint16_t X_coor,adc_value_x[NUM_samples]=0;
	uint32_t i,num;
 	config_pins_x();
	ADC_ChannelCmd(LPC_ADC, ADC_CHANNEL_1, ENABLE);

	for(num=0;num<NUM_samples;num++){
		ADC_StartCmd(LPC_ADC, ADC_START_NOW);
		//Wait conversion complete
		
		while (!(ADC_ChannelGetStatus(LPC_ADC, ADC_CHANNEL_1, ADC_DATA_DONE)));
		
		for(i=0;i<=100;i++);	
		adc_value_x[num] = ADC_ChannelGetData(LPC_ADC, ADC_CHANNEL_1);
	}
	ADC_ChannelCmd(LPC_ADC, ADC_CHANNEL_1, DISABLE);

	X_coor = (adc_value_x[2]+ adc_value_x[3])*LCD_XSIZE/(2*4096) ;

	return X_coor;

 }

 /*----------------------------------------------------------------------------
  read the y position
 *----------------------------------------------------------------------------*/
 unsigned short read_ch_y(void){

 	uint16_t Y_coor,adc_value_y[NUM_samples]=0;
	uint32_t i,num;
 	config_pins_y();
	ADC_ChannelCmd(LPC_ADC, ADC_CHANNEL_0, ENABLE);

	for(num=0;num<NUM_samples;num++){
		ADC_StartCmd(LPC_ADC, ADC_START_NOW);
		//Wait conversion complete
		while (!(ADC_ChannelGetStatus(LPC_ADC, ADC_CHANNEL_0, ADC_DATA_DONE)));
		
		for(i=0;i<=100;i++);						   //延时，重要！
		adc_value_y[num] = ADC_ChannelGetData(LPC_ADC, ADC_CHANNEL_0);
	}
	ADC_ChannelCmd(LPC_ADC, ADC_CHANNEL_0, DISABLE);

	Y_coor = (adc_value_y[2]+ adc_value_y[3])*LCD_YSIZE/(2*4096) ;

	return Y_coor;

 }