求帮忙:触摸屏的移植

jimmjimm

刚刚接手一个项目,需要移植触摸屏驱动,用的是uCGUI+uCOS_V1.3, 我搞了2天都没搞定,特来求教大大,下面是更改过的代码,我还是第一次接触这个啊,求大大帮忙

触摸芯片是xpt2046 链接SPI1 SCK (PA5)SPI1 MISO(PA6) SPI1 MOSI(PA7) Touch_int PG10 Touch_CS PG9

void Touch_GPIO_Init(void) 

{ 

GPIO_InitTypeDef  GPIO_InitStructure;

SPI_InitTypeDef   SPI_InitStructure;

/* ????GPIO?±?? */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOG |

RCC_APB2Periph_AFIO, ENABLE);

/* ???? SPI1 ???è?±?? */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1,ENABLE);

/* ???? PA5??PA6??PA7 ?????????ì?????????? SCK, MISO and MOSI */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_Init(GPIOA,&GPIO_InitStructure);

/* ??????·?????±???×???????????????????SPI1???°???è??????????????*/

/* ???? PG7 ???????ì?????????? TP_CS  */

XPT2046_CS_1();

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_Init(GPIOG,&GPIO_InitStructure);

#if 1

/* ????????°ì·¨????????EEPROM MMA???????????????? */

// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;

// GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

// GPIO_Init(GPIOB, &GPIO_InitStructure);

#else

    EXTI_InitTypeDef  EXTI_InitStructure;

/* ???? PG6 ??????????????????????±????? */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

GPIO_Init(GPIOG, &GPIO_InitStructure);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOG, GPIO_PinSource10);

    /* ???????????????? */

    EXTI_InitStructure.EXTI_Line = EXTI_Line6;

    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

    EXTI_Init(&EXTI_InitStructure);

#endif

/* ???? SPI1?¤×÷???? */

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; /* ?í?????????? */

/*

SPI_BaudRatePrescaler_64 ????SCK?±????????1M

TSC2046 ??SCK?±???????ó????????????????×???200ns??????400ns????????2.5M

???¨?÷????????

SPI_BaudRatePrescaler_64 ?±??SCK?±???????? 1.116M

SPI_BaudRatePrescaler_32 ?±??SCK?±???????? 2.232M

*/

SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;

SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;

SPI_InitStructure.SPI_CRCPolynomial = 7;

SPI_Init(SPI1,&SPI_InitStructure);

/* ???? SPI1 */

SPI_Cmd(SPI1,ENABLE);  

}

#define T_DATA     GPIOA

#define DCLK_0   T_DATA->BRR  = GPIO_Pin_5

#define DCLK_1   T_DATA->BSRR = GPIO_Pin_5

#define TCS_0      GPIOG->BRR  = GPIO_Pin_9

#define TCS_1      GPIOG->BSRR = GPIO_Pin_9

#define DIN_0     T_DATA->BRR  = GPIO_Pin_6

#define DIN_1     T_DATA->BSRR = GPIO_Pin_6

#define DOUT    (T_DATA->IDR  & GPIO_Pin_7)

正点原子

回复【楼主位】jimmjimm:
---------------------------------
单独测试触摸屏(不搞GUI,就读X,Y坐标),成功了么?

jimmjimm

回复【2楼】正点原子:
---------------------------------
不成功,按上去只有Touch_int有反应,我是看GPIOA和GPIOG的即时数值的....我连怎么找到并反应x,y的值都不知道.........55555求救啊

问题有一个大概的方向了....WriteCharTo7843 跟ReadFromCharFrom7843 似乎不能得到正确的值,不过这两个我完全没有看懂在做什么........完全不清楚num是怎么写和怎么读的...

void WriteCharTo7843(u8 num)          //SPI??????

{

u8 count=0;

DCLK_0;

for(count=0;count<8;count++)

{

if((num&0x80)==0x00)

DIN_0;

else

DIN_1;

num<<=1;                //?????????§

DCLK_0;                 //?????????§

delays(1);

DCLK_1; 

}

}

//**********************************************************

u16 ReadFromCharFrom7843(void)             //SPI ??????

{

u8 count=0;

u16 Num=0;

for(count=0;count<12;count++)

{

Num<<=1;

DCLK_1;

delays(1);

DCLK_0;

if(DOUT!=0) 

Num++;

}

return(Num);

}

int  GUI_TOUCH_X_MeasureX(void) 

{

unsigned int TX[5];

unsigned char i = 0;

u16 min,temp; //????????·¨???ò

u8 k = 0;

TCS_0;

for (i = 0;i <5 ;i++) {

WriteCharTo7843(0xD0);        //??????×? 10010000 ??????·?·?????X×?±ê ?ê??????????×???

DCLK_1; 

delays(1);

DCLK_0; 

TX=ReadFromCharFrom7843();

}

TCS_1;

for(i = 0;i < 5;i++) {  

min = i;  

for(k = i+1;k != 5;k++){

if(TX[min] > TX[k])  

   min = k;

    }   

temp=TX;    

TX=TX[min];   

TX[min]=temp;

}

  return TX[2];

}

int  GUI_TOUCH_X_MeasureY(void) 

{

int TY[5];

unsigned char i = 0;

u16 min,temp; //????????·¨???ò

u8 k = 0;

TCS_0;

for (i = 0;i <5 ;i++) {

WriteCharTo7843(0x90);        //??????×? 10010000 ??????·?·?????Y×?±ê ?ê??????????×???

DCLK_1; 

delays(1);

DCLK_0; 

TY=ReadFromCharFrom7843();

  }

TCS_1;

for(i = 0;i < 5;i++) {  

min = i;  

for(k = i+1;k != 5;k++){

if(TY[min] > TY[k])  

   min = k;

    }   

temp=TY;    

TY=TY[min];   

TY[min]=temp;

}

  return TY[2];

}

正点原子

回复【3楼】jimmjimm:
---------------------------------
研究下XPT2406的手册吧.还搞了2天,居然都不知道在呢么读XPT2046,你这跑题跑远了啊...

jimmjimm

回复【4楼】正点原子:

回复【3楼】jimmjimm:
---------------------------------
研究下XPT2406的手册吧.还搞了2天,居然都不知道在呢么读XPT2046,你这跑题跑远了啊...

---------------------------------
找到一点问题,GUI_TOUCH_X_MeasureX,GUI_TOUCH_X_MeasureY里面的TX和TY都是FFF可是ReadFromCharFrom7843返回的值却不是,我把TX重新定义成u16也一样,
这是为什么呢