static void codec_send(rt_uint16_t s_data)
{
rt_sem_take(&spi1_lock, RT_WAITING_FOREVER);
/* SPI1 configure */
rt_hw_spi1_baud_rate(SPI_BaudRatePrescaler_64);/* 72M/64=1.125M */
codec_reset_csb();
SPI_WriteByte((s_data >> 8) & 0xFF);
SPI_WriteByte(s_data & 0xFF);
codec_set_csb();
rt_sem_release(&spi1_lock);
}
static void rtgui_touch_calculate()
{
if (touch != RT_NULL)
{
rt_sem_take(&spi1_lock, RT_WAITING_FOREVER);
/* SPI1 configure */
rt_hw_spi1_baud_rate(SPI_BaudRatePrescaler_64);/* 72M/64=1.125M */
//读取触摸值
{
rt_uint16_t tmpx[10];
rt_uint16_t tmpy[10];
unsigned int i;
for(i=0; i<10; i++)
{
CS_0();
WriteDataTo7843(TOUCH_MSR_X); /* read X */
tmpx[i] = SPI_WriteByte(0x00)<<4; /* read MSB bit[11:8] */
tmpx[i] |= ((SPI_WriteByte(TOUCH_MSR_Y)>>4)&0x0F ); /* read LSB bit[7:0] */
tmpy[i] = SPI_WriteByte(0x00)<<4; /* read MSB bit[11:8] */
tmpy[i] |= ((SPI_WriteByte(0x00)>>4)&0x0F ); /* read LSB bit[7:0] */
WriteDataTo7843( 1<<7 ); /* 打开中断 */
CS_1();
}
//去最高值与最低值,再取平均值
{
rt_uint32_t min_x = 0xFFFF,min_y = 0xFFFF;
rt_uint32_t max_x = 0,max_y = 0;
rt_uint32_t total_x = 0;
rt_uint32_t total_y = 0;
unsigned int i;
for(i=0;i<10;i++)
{
if( tmpx[i] < min_x )
{
min_x = tmpx[i];
}
if( tmpx[i] > max_x )
{
max_x = tmpx[i];
}
total_x += tmpx[i];
if( tmpy[i] < min_y )
{
min_y = tmpy[i];
}
if( tmpy[i] > max_y )
{
max_y = tmpy[i];
}
total_y += tmpy[i];
}
total_x = total_x - min_x - max_x;
total_y = total_y - min_y - max_y;
touch->x = total_x / 8;
touch->y = total_y / 8;
}//去最高值与最低值,再取平均值
}//读取触摸值
rt_sem_release(&spi1_lock);
/* if it's not in calibration status */
if (touch->calibrating != RT_TRUE)
{
if (touch->max_x > touch->min_x)
{
touch->x = (touch->x - touch->min_x) * X_WIDTH/(touch->max_x - touch->min_x);
}
else
{
touch->x = (touch->min_x - touch->x) * X_WIDTH/(touch->min_x - touch->max_x);
}
if (touch->max_y > touch->min_y)
{
touch->y = (touch->y - touch->min_y) * Y_WIDTH /(touch->max_y - touch->min_y);
}
else
{
touch->y = (touch->min_y - touch->y) * Y_WIDTH /(touch->min_y - touch->max_y);
}
}
}
static void rtgui_touch_calculate()
{
if (touch != RT_NULL)
{
rt_sem_take(&spi1_lock, RT_WAITING_FOREVER);
/* SPI1 configure */
rt_hw_spi1_baud_rate(SPI_BaudRatePrescaler_64);/* 72M/64=1.125M */
//读取触摸值
{
rt_uint16_t tmpx[10];
rt_uint16_t tmpy[10];
unsigned int i;
/* From the datasheet:
* When the very first CLK after the control byte comes in, the
* DOUT of ADS7843 is not valid. So we could only get 7bits from
* the first SPI_WriteByte. And the got the following 5 bits from
* another SPI_WriteByte.(aligned MSB)
*/
for(i=0; i<10; i++)
{
CS_0();
WriteDataTo7843(TOUCH_MSR_X);
tmpx[i] = (SPI_WriteByte(0x00) & 0x7F) << 5;
tmpx[i] |= (SPI_WriteByte(TOUCH_MSR_Y) >> 3) & 0x1F;
tmpy[i] = (SPI_WriteByte(0x00) & 0x7F) << 5;
tmpy[i] |= (SPI_WriteByte(0x00) >> 3) & 0x1F;
WriteDataTo7843( 1<<7 ); /* 打开中断 */
CS_1();
}
//去最高值与最低值,再取平均值
{
rt_uint32_t min_x = 0xFFFF,min_y = 0xFFFF;
rt_uint32_t max_x = 0,max_y = 0;
rt_uint32_t total_x = 0;
rt_uint32_t total_y = 0;
unsigned int i;
for(i=0;i<10;i++)
{
if( tmpx[i] < min_x )
{
min_x = tmpx[i];
}
if( tmpx[i] > max_x )
{
max_x = tmpx[i];
}
total_x += tmpx[i];
if( tmpy[i] < min_y )
{
min_y = tmpy[i];
}
if( tmpy[i] > max_y )
{
max_y = tmpy[i];
}
total_y += tmpy[i];
}
total_x = total_x - min_x - max_x;
total_y = total_y - min_y - max_y;
touch->x = total_x / 8;
touch->y = total_y / 8;
}//去最高值与最低值,再取平均值
}//读取触摸值
rt_sem_release(&spi1_lock);
/* if it's not in calibration status */
if (touch->calibrating != RT_TRUE)
{
if (touch->max_x > touch->min_x)
{
touch->x = (touch->x - touch->min_x) * X_WIDTH/(touch->max_x - touch->min_x);
}
else if (touch->max_x < touch->min_x)
{
touch->x = (touch->min_x - touch->x) * X_WIDTH/(touch->min_x - touch->max_x);
}
if (touch->max_y > touch->min_y)
{
touch->y = (touch->y - touch->min_y) * Y_WIDTH /(touch->max_y - touch->min_y);
}
else if (touch->max_y < touch->min_y)
{
touch->y = (touch->min_y - touch->y) * Y_WIDTH /(touch->min_y - touch->max_y);
}
// normalize the data
if (touch->x & 0x8000)
touch->x = 0;
else if (touch->x > X_WIDTH)
touch->x = X_WIDTH - 1;
if (touch->y & 0x8000)
touch->y = 0;
else if (touch->y > Y_WIDTH)
touch->y = Y_WIDTH - 1;
}
}
