/*******************************************************************************
* Function Name : Read_X
* Description : 读取ADS7843通道X+的ADC值
* Input : None
* Output : None
* Return : ADS7843返回通道X+的ADC值
* Attention : None
*******************************************************************************/
int Read_X(void)
{
int i;
TP_CS(0); //CS作用有待考虑。。。。写指令读数据时候需将CS拉低?
DelayUS(1);
WR_CMD(CHX); /* 通道Y+的选择控制字 */
DelayUS(1);
i=RD_AD();
TP_CS(1);
return i;
}
/*******************************************************************************
* Function Name : Read_Y
* Description : ¶ÁÈ¡ADS7843ͨµÀY+µÄADCÖµ
* Input : None
* Output : None
* Return : ADS7843·µ»ØͨµÀY+µÄADCÖµ
* 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 : Read_X
* Description : Read ADS7843 ADC value of X + channel
* Input : None
* Output : None
* Return : return X + channel ADC value
* Attention : None
*******************************************************************************/
static int Read_X(void)
{
TP_CS(0);
DelayUS(1);
WR_CMD(CHX);
DelayUS(1);
int i = RD_AD();
TP_CS(1);
return i;
}
/*******************************************************************************
* Function Name : TP_Init
* Description : ADS7843端口初始化
* Input : None
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
void TP_Init(void)
{
LPC_GPIO0->FIODIR |= (1<<6); /* P0.6 CS is output */
LPC_GPIO2->FIODIR |= (0<<13); /* P2.13 TP_INT is input */
TP_CS(1);
ADS7843_SPI_Init();
}
//====================================================================================
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);
}
}
/*******************************************************************************
* Function Name : TP_Init
* Description : ADS7843 Port initialization
* Input : None
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
void TSDriver_Initialize(void)
{
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStruct;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOD, ENABLE);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_15 | GPIO_Pin_13 | GPIO_Pin_14;
GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2 ); //sclk 10 13
GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2 ); //mýso 11 14
GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2 ); //mosý 12 15
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
SPI_I2S_DeInit(SPI2 );
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_CPOL_Low SPI_CPOL_High
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //SPI_NSS_Hard //SPI_NSS_Soft
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; //16
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI2, &SPI_InitStructure);
SPI_Cmd(SPI2, ENABLE);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_12; // 3
GPIO_Init(GPIOB, &GPIO_InitStruct); // d
TP_CS(1);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6; //Pin 6 is IRQ
GPIO_Init(GPIOD, &GPIO_InitStruct);
touch_interrupt_init();
}
/*******************************************************************************
* Function Name : TP_Init
* Description : ADS7843¶Ë¿Ú³õʼ»¯
* Input : None
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
void TP_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
/* Configure SPI2 pins: SCK, MISO and MOSI ---------------------------------*/
RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOB|RCC_AHB1Periph_GPIOD, ENABLE);
GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AF;
GPIO_InitStruct.GPIO_Speed=GPIO_Speed_25MHz;
GPIO_InitStruct.GPIO_OType=GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd=GPIO_PuPd_UP;
GPIO_InitStruct.GPIO_Pin=GPIO_Pin_15|GPIO_Pin_13|GPIO_Pin_14;
GPIO_Init(GPIOB,&GPIO_InitStruct);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2); //sclk 10 13
GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2); //mýso 11 14
GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2); //mosý 12 15
/* TP_CS */
GPIO_InitStruct.GPIO_Mode=GPIO_Mode_OUT;
GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_OType=GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd=GPIO_PuPd_UP;
GPIO_InitStruct.GPIO_Pin=GPIO_Pin_12; // 3
GPIO_Init(GPIOB,&GPIO_InitStruct); // d
/* TP_IRQ */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
GPIO_InitStruct.GPIO_Mode=GPIO_Mode_IN;
GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_OType=GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd=GPIO_PuPd_NOPULL;
GPIO_InitStruct.GPIO_Pin=GPIO_Pin_6;
GPIO_Init(GPIOD,&GPIO_InitStruct);
/**/
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOD, EXTI_PinSource6);
EXTI_InitStructure.EXTI_Line = EXTI_Line6;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/**/
TP_CS(1);
ADS7843_SPI_Init();
}
/*******************************************************************************
* Function Name : TP_Init
* Description :
* Input : None
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
void TP_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(Open_SPI_SCK_GPIO_CLK | Open_SPI_MISO_GPIO_CLK | Open_SPI_MOSI_GPIO_CLK,ENABLE);
RCC_AHB1PeriphClockCmd(Open_TP_CS_CLK | Open_TP_IRQ_CLK,ENABLE);
Open_SPI_CLK_INIT(Open_RCC_SPI,ENABLE);
GPIO_PinAFConfig(Open_SPI_SCK_GPIO_PORT, Open_SPI_SCK_SOURCE, Open_GPIO_AF_SPI);
GPIO_PinAFConfig(Open_SPI_MISO_GPIO_PORT, Open_SPI_MISO_SOURCE, Open_GPIO_AF_SPI);
GPIO_PinAFConfig(Open_SPI_MOSI_GPIO_PORT, Open_SPI_MOSI_SOURCE, Open_GPIO_AF_SPI);
GPIO_InitStructure.GPIO_Pin = Open_SPI_SCK_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(Open_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = Open_SPI_MISO_PIN;
GPIO_Init(Open_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = Open_SPI_MOSI_PIN;
GPIO_Init(Open_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);
/* TP_CS */
GPIO_InitStructure.GPIO_Pin = Open_TP_CS_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(Open_TP_CS_PORT, &GPIO_InitStructure);
/*TP_IRQ */
GPIO_InitStructure.GPIO_Pin = Open_TP_IRQ_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN ;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(Open_TP_IRQ_PORT, &GPIO_InitStructure);
TP_CS(1);
ADS7843_SPI_Init();
}
//读取触摸屏Y返回值
u16 TouchReadY(void)
{
u16 y=0;
TP_CS();
SpiDelay(10);
SPI_WriteByte(0xD0);
SpiDelay(10);
y=SPI_WriteByte(0x00);
y<<=8;
y+=SPI_WriteByte(0x00);
SpiDelay(10);
TP_DCS();
y = y>>3;
return (y);
}
//读取触摸屏X返回值
u16 TouchReadX(void)
{
u16 x=0;
TP_CS();
SpiDelay(10);
SPI_WriteByte(0x90);
SpiDelay(10);
x=SPI_WriteByte(0x00);
x<<=8;
x+=SPI_WriteByte(0x00);
SpiDelay(10);
TP_DCS();
x = x>>3;
return (x);
}
u16 TPReadY(SPI_TypeDef* SPIx)
{
u16 y=0;
TP_CS();
SpiDelay(10);
SPI_ReadWrite(SPIx, 0xD0);
// SPI_ReadWrite(0x90);
SpiDelay(10);
y=SPI_ReadWrite(SPIx, 0x00);
y<<=8;
y+=SPI_ReadWrite(SPIx, 0x00);
SpiDelay(10);
TP_DCS();
y = y>>3;
return (y);
}
u16 TPReadX(SPI_TypeDef* SPIx)
{
u16 x=0;
TP_CS();
SpiDelay(10);
SPI_ReadWrite(SPIx, 0x90);
// SPI_ReadWrite(0xd0);
SpiDelay(10);
x=SPI_ReadWrite(SPIx, 0x00);
x<<=8;
x+=SPI_ReadWrite(SPIx, 0x00);
SpiDelay(10);
TP_DCS();
x = x>>3;
return (x);
}
//====================================================================================
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);
}
//====================================================================================
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);
}
/**
* @brief Configure GPIO
* @param None
* @retval None
*/
static void TSC_GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
/* Configure SPI1 pins: SCK, MISO and MOSI ---------------------------------*/
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStruct);
#if 0
/* TP_CS pc6*/
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStruct);
/* TP_IRQ Pc4*/
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStruct);
#endif
/* TP_CS */
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStruct);
/* TP_IRQ */
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_13 ;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IPU ;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStruct);
TP_CS(1);
}
/*******************************************************************************
* Function Name : TP_Init
* Description : ADS7843端口初始化，触摸屏通信
* Input : None
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
void TP_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB , ENABLE);
/* Configure SPI2 pins: SCK, MISO and MOSI ---------------------------------*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* TP_CS */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* TP_IRQ */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU ;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
TP_CS(1); //x ? GPIO_SetBits(GPIOB,GPIO_Pin_5): GPIO_ResetBits(GPIOB,GPIO_Pin_5)片选端的初始化
ADS7843_SPI_Init();
//TP_CS(0);
}
