touchpanel.c

ssd1289驱动源码

/*********************************************************************************************************
*
* File                : TouchPanel.c
* Hardware Environment: 
* Build Environment   : RealView MDK-ARM  Version: 4.20
* Version             : V1.0
* By                  : 
*
*                                  (c) Copyright 2005-2011, WaveShare
*                                       http://www.waveshare.net
*                                          All Rights Reserved
*
*********************************************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "TouchPanel.h"
#include "SysTick/systick.h"
#include "LCD/LCD.h"

/* Private variables ---------------------------------------------------------*/
Matrix matrix ;
Coordinate  display ;


Coordinate ScreenSample[3];

Coordinate DisplaySample[3] =   {
                                            { 45, 45 },
											{ 270, 90},
                                            { 100,190}
	                            } ;

/* Private define ------------------------------------------------------------*/
#define THRESHOLD 2


/*******************************************************************************
* Function Name  : ADS7843_SPI_Init
* Description    : 
* Input          : None
* Output         : None
* Return         : None
* Attention		 : None
*******************************************************************************/
static void ADS7843_SPI_Init(void) 
{ 
  SPI_InitTypeDef  SPI_InitStructure;
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
  /* DISABLE SPI2 */ 
  SPI_Cmd(SPI2, DISABLE); 
  /* SPI2 Config -------------------------------------------------------------*/ 
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; 
  SPI_InitStructure.SPI_Mode = SPI_Mode_Master; 
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; 
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; 
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; 
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; 
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64; 
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; 
  SPI_InitStructure.SPI_CRCPolynomial = 7; 
  SPI_Init(SPI2, &SPI_InitStructure); 
  /* Enable SPI2 */ 
  SPI_Cmd(SPI2, ENABLE); 
} 

/*******************************************************************************
* Function Name  : TP_Init
* Description    : 
* Input          : None
* Output         : None
* Return         : None
* Attention		 : None
*******************************************************************************/
void TP_Init(void) 
{ 
  GPIO_InitTypeDef GPIO_InitStruct;
  RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC, ENABLE);

  /* Configure SPI2 pins: SCK, MISO and MOSI ---------------------------------*/ 
	GPIO_InitStruct.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
	GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStruct);

  /* TP_CS */
  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4;
	GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
	GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOC,&GPIO_InitStruct);

  /* TP_IRQ */
  GPIO_InitStruct.GPIO_Pin =  GPIO_Pin_5;
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStruct);
  
  TP_CS(1); 
  ADS7843_SPI_Init(); 
} 


/*******************************************************************************
* Function Name  : DelayUS
* Description    : 
* Input          : - cnt:
* Output         : None
* Return         : None
* Attention		 : None
*******************************************************************************/
static void DelayUS(vu32 cnt)
{
  uint16_t i;
  for(i = 0;i<cnt;i++)
  {
     uint8_t us = 12;
     while (us--)
     {
       ;   
     }
  }
}


/*******************************************************************************
* Function Name  : WR_CMD
* Description    : 
* Input          : - cmd: 
* Output         : None
* Return         : None
* Attention		 : None
*******************************************************************************/
static void WR_CMD (uint8_t cmd)  
{ 
  /* Wait for SPI2 Tx buffer empty */ 
  while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET); 
  /* Send SPI2 data */ 
  SPI_I2S_SendData(SPI2,cmd); 
  /* Wait for SPI2 data reception */ 
  while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET); 
  /* Read SPI2 received data */ 
  SPI_I2S_ReceiveData(SPI2); 
} 



/*******************************************************************************
* Function Name  : RD_AD
* Description    : 
* Input          : None
* Output         : None
* Return         : 
* Attention		 : None
*******************************************************************************/
static int RD_AD(void)  
{ 
  unsigned short buf,temp; 
  /* Wait for SPI2 Tx buffer empty */ 
  while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET); 
  /* Send SPI2 data */ 
  SPI_I2S_SendData(SPI2,0x0000); 
  /* Wait for SPI2 data reception */ 
  while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET); 
  /* Read SPI2 received data */ 
  temp=SPI_I2S_ReceiveData(SPI2); 
  buf=temp<<8; 
  DelayUS(1); 
  while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET); 
  /* Send SPI2 data */ 
  SPI_I2S_SendData(SPI2,0x0000); 
  /* Wait for SPI2 data reception */ 
  while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET); 
  /* Read SPI2 received data */ 
  temp=SPI_I2S_ReceiveData(SPI2); 
  buf |= temp; 
  buf>>=3; 
  buf&=0xfff; 
  return buf; 
} 


/*******************************************************************************
* Function Name  : Read_X
* Description    : Read ADS7843 ADC X 
* Input          : None
* Output         : None
* Return         : 
* Attention		 : None
*******************************************************************************/
int Read_X(void)  
{  
  int i; 
  TP_CS(0); 
  DelayUS(1); 
  WR_CMD(CHX); 
  DelayUS(1); 
  i=RD_AD(); 
  TP_CS(1); 
  return i;    
} 

/*******************************************************************************
* Function Name  : Read_Y
* Description    : Read ADS7843 ADC Y
* Input          : None
* Output         : None
* Return         : 
* Attention		 : None
*******************************************************************************/
int Read_Y(void)  
{  
  int i; 
  TP_CS(0); 
  DelayUS(1); 
  WR_CMD(CHY); 
  DelayUS(1); 
  i=RD_AD(); 
  TP_CS(1); 
  return i;     
} 


/*******************************************************************************
* Function Name  : TP_GetAdXY
* Description    : Read ADS7843
* Input          : None
* Output         : None
* Return         : 
* Attention		 : None
*******************************************************************************/
void TP_GetAdXY(int *x,int *y)  
{ 
  int adx,ady; 
  adx=Read_X(); 
  DelayUS(1); 
  ady=Read_Y(); 
  *x=adx; 
  *y=ady; 
} 

/*******************************************************************************
* Function Name  : TP_DrawPoint