static unsigned short XPT2046_ReadCMD(void)
{
unsigned short buf=0,temp;
unsigned char i;
TP_DIN(0);
TP_DCLK(1);
for(i=0;i<12;i++)
{
TP_DCLK(0);
temp= (TP_DOUT) ? 1:0;
buf|=(temp<<(11-i));
TP_DCLK(1);
}
buf&=0x0fff;
return(buf);
}
//====================================================================================
static void WR_CMD (unsigned char cmd)
{
unsigned char buf;
unsigned char i;
TP_CS(1);
TP_DIN(0);
TP_DCLK(0);
TP_CS(0);
for(i=0;i<8;i++)
{
buf=(cmd>>(7-i))&0x1;
TP_DIN(buf);
Delayus(5);
TP_DCLK(1);
Delayus(5);
TP_DCLK(0);
}
}
/*
*********************************************************************************************************
* 函 数 名: XPT2046_WriteCMD
* 功能说明: 写命令
* 形 参：CHX 0x90 //通道Y+的选择控制字 CHY 0xd0 //通道X+的选择控制字
* 返 回 值: 无
*********************************************************************************************************
*/
static void XPT2046_WriteCMD(unsigned char cmd)
{
unsigned char buf;
unsigned char i;
// TP_CS(1);
TP_DIN(0);
TP_DCLK(0);
// TP_CS(0);
for(i=0;i<8;i++)
{
buf=(cmd>>(7-i))&0x1;
TP_DIN(buf);
//Delayus(5);
DelayUS(5);
TP_DCLK(1);
//Delayus(5);
DelayUS(5);
TP_DCLK(0);
}
}
//====================================================================================
static unsigned short RD_AD(void)
{
unsigned short buf=0,temp;
unsigned char i;
TP_DIN(0);
TP_DCLK(1);
for(i=0;i<12;i++)
{
Delayus(5);
TP_DCLK(0);
Delayus(5);
temp= (TP_DOUT) ? 1:0;
buf|=(temp<<(11-i));
Delayus(5);
TP_DCLK(1);
}
TP_CS(1);
buf&=0x0fff;
return(buf);
}
//====================================================================================
void TSC_Init(void)
{
/* Enable SPI1 and GPIO clocks */
RCC->AHB1ENR |=((1UL << 0) | /* Enable GPIOA clock */
(1UL << 1) | /* Enable GPIOB clock */
(1UL << 2)); /* Enable GPIOC clock */
//PA.15 as CS OUTPUT
GPIOA->MODER &= ~0xC0000000; /* Clear Bits */
GPIOA->MODER |= 0x40000000; /* Alternate Function mode */
GPIOA->OSPEEDR &= ~0xC0000000; /* Clear Bits */
GPIOA->OSPEEDR |= 0x80000000; /* 50 MHz Fast speed */
GPIOA->AFR[0] &= ~0x00000000; /* Clear Bits */
GPIOA->AFR[0] |= 0x00000000; /* Alternate Function mode AF12 */
GPIOA->AFR[1] &= ~0xF0000000; /* Clear Bits */
GPIOA->AFR[1] |= 0x00000000; /* Alternate Function mode AF12 */
//PB.15 as IRQ[I], PB.04 as SCK[O], PB.05 as MISO[I], PB.01 as MOSI[O]
GPIOB->MODER &= ~0xC0000F0C; /* Clear Bits */
GPIOB->MODER |= 0x00000104; /* Alternate Function mode */
GPIOB->OSPEEDR &= ~0xC0000F0C; /* Clear Bits */
GPIOB->OSPEEDR |= 0x80000A08; /* 50 MHz Fast speed */
GPIOB->AFR[0] &= ~0x00FF00F0; /* Clear Bits */
GPIOB->AFR[0] |= 0x00000000; /* Alternate Function mode AF12 */
GPIOB->AFR[1] &= ~0xF0000000; /* Clear Bits */
GPIOB->AFR[1] |= 0x00000000; /* Alternate Function mode AF12 */
//PC.2 as BUSY[I]
GPIOC->MODER &= ~0x00000030; /* Clear Bits */
GPIOC->MODER |= 0x00000000; /* Alternate Function mode */
GPIOC->OSPEEDR &= ~0x00000030; /* Clear Bits */
GPIOC->OSPEEDR |= 0x00000020; /* 50 MHz Fast speed */
GPIOC->AFR[0] &= ~0x00000F00; /* Clear Bits */
GPIOC->AFR[0] |= 0x00000000; /* Alternate Function mode AF12 */
GPIOC->AFR[1] &= ~0x00000000; /* Clear Bits */
GPIOC->AFR[1] |= 0x00000000; /* Alternate Function mode AF12 */
TP_CS(1);
TP_DCLK(0);
TP_DIN(0);
}