/*********************************************************************
*
* GUI_TOUCH_X_ActivateX()4
*
* Function decription:
* Called from GUI, if touch support is enabled.
* Switches on voltage on X-axis,
* prepares measurement for Y-axis.
* Voltage on Y-axis is switched off.
*/
void GUI_TOUCH_X_ActivateX(void) {
U32 v;
_CheckTouch();
if (_HasTouch) {
//
// Setup ADC channel 1(P0.24)
//
v = LPC_ADC->CR;
v &= ~(0xFFul);
v |= (1 << 1);
LPC_ADC->CR = v; //选择通道1
//
// xPlus = ADC0_IN[1]
//设置P0.24引脚为模拟输入引脚，使用引脚功能1
IOCON_CLR_FUNC_MODE_ADMODE_AND_ADD_MASK(P0_24, 1);
//
// yPlus = GPIO out, high, enable input buffer
//
IOCON_CLR_FUNC_MODE_ADMODE_AND_ADD_MASK(P0_12, IOCON_ENABLE_INPUT_BUFFER);
LPC_GPIO0->DIR |= (1uL << 12);
LPC_GPIO0->SET |= (1uL << 12);
//
// xMinus = GPIO in, floating
//
IOCON_CLR_FUNC_MODE_ADMODE_AND_ADD_MASK(P0_23, 0);
LPC_GPIO0->DIR &= ~(1uL << 23);
//
// yMinus = GPIO out, low
//
IOCON_CLR_FUNC_MODE_ADMODE_AND_ADD_MASK(P1_31, 0);
LPC_GPIO1->DIR |= (1uL << 31);
LPC_GPIO1->CLR |= (1uL << 31);
}
}
/*********************************************************************
*
* GUI_TOUCH_X_ActivateX()4
*
* Function decription:
* Called from GUI, if touch support is enabled.
* Switches on voltage on X-axis,
* prepares measurement for Y-axis.
* Voltage on Y-axis is switched off.
*/
void GUI_TOUCH_X_ActivateX(void) {
_CheckTouch();
}
