ddi_touch_panel.c

处理按下和弹起sigmatel36XX,37XX硬件处理。

#include "ddi_touch_panel.h"
#include <drivers\ddi_icoll.h>
#include <os\os_eoi_api.h>
#include <registers\regs.h>
#include <registers\hw_irq.h>
#include <registers\regspinctrl.h>
#include <registers\regslradc.h>
#include <os\os_msg_api.h>
#include <components\ui_messages.h>
#include <hw\hw_gpio.h>
#ifdef DEBUG
#define DEBUG_TOUCH
#endif

extern int abs(int);
int Touch_Down_X;
int Touch_Down_Y;

void ddi_touch_Handler(void* pData);


RtStatus_t ddi_touch_Init(uint16_t uDisplayWidth, uint16_t uDisplayHeight, TX_QUEUE *pTouchEventQueue)
{
    if (hw_lradc_GetTouchDetectPresent())
    {
//	g_uTouchScreen_Width = uDisplayWidth;
//	g_uTouchScreen_Height = uDisplayHeight;
	g_pUI_Touch_Queue = pTouchEventQueue;
	ddi_icoll_RegisterIrqHandler(VECTOR_IRQ_TOUCH_DETECT,
		&ddi_touch_Handler,
		(void*) NULL,
		IRQ_HANDLER_DEFERRED,
		ICOLL_PRIORITY_LEVEL_0);
	hw_icoll_EnableVector((ICOLL_IRQ_enums_t)(VECTOR_IRQ_TOUCH_DETECT), TRUE);
	hw_lradc_EnableTouchDetectInterrupt(TRUE);
	hw_lradc_EnableTouchDetect(TRUE);
	return SUCCESS;
    }
    else
	return ERROR_HW_LRADC_CH_NOT_PRESENT;
}


void ddi_touch_Handler(void* pData)
{
    static bool bTouchedLast;
    bool bTouched;
    int32_t VRef;
    int32_t Xx, Yy;
    int32_t X, Y;
    uint32_t uXYPos;
    os_msg_struct_t uiTouchMsg;
    int32_t nTemp = 0;

    bTouched = hw_lradc_GetTouchDetect();
    if (bTouched == bTouchedLast)
	goto End;
    
    if (!bTouched )
    {
    		{
	BUILD_NONALLOCATED_MSG(&uiTouchMsg, OS_MSG_UI_GROUP, MSG_UI_TOUCH_PANEL_RAW_UP, (Touch_Down_Y << 16)|Touch_Down_X);
	if (tx_queue_send(g_pUI_Touch_Queue, &uiTouchMsg, TX_NO_WAIT) == TX_SUCCESS)
	{
	    bTouchedLast = FALSE;
	}
    		}
    }
    else
    {
	hw_lradc_EnableTouchDetect(FALSE);
	tx_thread_sleep(1);
	BF_SET(LRADC_CTRL3, FORCE_PWD40UA_PWUP);
	BF_SET(LRADC_CTRL3, FORCE_ANALOG_PWUP);

	// get Y value
	hw_lradc_EnableTouchDetectYDrive(TRUE);
	hw_lradc_ConfigureChannel(LRADC_CH3, TRUE, FALSE, 0);
	hw_lradc_ConfigureChannel(LRADC_CH2, TRUE, FALSE, 0);
	
	BF_CLR(LRADC_CTRL1, LRADC2_IRQ);
	BF_CLR(LRADC_CTRL1, LRADC3_IRQ);
	hw_lradc_SetDelayTrigger(LRADC_DELAY_TRIGGER2, (1 << LRADC_CH2)|(1 << LRADC_CH3), 1 << LRADC_DELAY_TRIGGER2, 0, 2);
	hw_lradc_SetDelayTriggerKick(LRADC_DELAY_TRIGGER2, TRUE);
	nTemp = 0;
	while (1)
	{
	    while (!hw_lradc_GetInterruptFlag(LRADC_CH3))
	    {
	    };
	    BF_CLR(LRADC_CTRL1, LRADC2_IRQ);
	    BF_CLR(LRADC_CTRL1, LRADC3_IRQ);

	    VRef = hw_lradc_GetAccumValue(LRADC_CH3);
	    Yy = hw_lradc_GetAccumValue(LRADC_CH2);
	    if (abs(Yy - nTemp) < 5)
		break;
	    nTemp = Yy;
	};
	Yy = (Yy << 12) / VRef;
	Touch_Down_Y=Yy;
	hw_lradc_SetDelayTriggerKick(LRADC_DELAY_TRIGGER2, FALSE);
	hw_lradc_EnableTouchDetectYDrive(FALSE);

	// get X value
	hw_lradc_EnableTouchDetectXDrive(TRUE);	
	hw_lradc_ConfigureChannel(LRADC_CH2, TRUE, FALSE, 0);
	hw_lradc_ConfigureChannel(LRADC_CH3, TRUE, FALSE, 0);
	
	BF_CLR(LRADC_CTRL1, LRADC2_IRQ);
	BF_CLR(LRADC_CTRL1, LRADC3_IRQ);
	hw_lradc_SetDelayTrigger(LRADC_DELAY_TRIGGER2, (1 << LRADC_CH2)|(1 << LRADC_CH3), 1 << LRADC_DELAY_TRIGGER2, 0, 2);
	hw_lradc_SetDelayTriggerKick(LRADC_DELAY_TRIGGER2, TRUE);
	nTemp = 0;
	while (1)
	{
	    while (!hw_lradc_GetInterruptFlag(LRADC_CH3))
	    {
	    };
	    BF_CLR(LRADC_CTRL1, LRADC2_IRQ);
	    BF_CLR(LRADC_CTRL1, LRADC3_IRQ);
	    
	    VRef = hw_lradc_GetAccumValue(LRADC_CH2);
	    Xx = hw_lradc_GetAccumValue(LRADC_CH3);
	    if (abs(Xx - nTemp) < 5)
		break;
	    nTemp = Xx;
	};
	Xx = (Xx << 12) / VRef;
	Touch_Down_X=Xx;
	hw_lradc_SetDelayTriggerKick(LRADC_DELAY_TRIGGER2, FALSE);
	hw_lradc_EnableTouchDetectXDrive(FALSE);
	
	BF_CLR(LRADC_CTRL3, FORCE_PWD40UA_PWUP);
	BF_CLR(LRADC_CTRL3, FORCE_ANALOG_PWUP);
	hw_lradc_EnableTouchDetect(TRUE);
	tx_thread_sleep(1);

	if (hw_lradc_GetTouchDetect())
	{
	    uXYPos = (Touch_Down_Y << 16)|Touch_Down_X;
		    BUILD_NONALLOCATED_MSG(&uiTouchMsg, OS_MSG_UI_GROUP, MSG_UI_TOUCH_PANEL_RAW_DOWN, uXYPos);
		    if (tx_queue_send(g_pUI_Touch_Queue, &uiTouchMsg, TX_NO_WAIT) == TX_SUCCESS)
		    {
			bTouchedLast = TRUE;
		    }
	}
    }

End:
    hw_lradc_ClearTouchDetectInterruptFlag();
    hw_icoll_EnableVector((ICOLL_IRQ_enums_t)(VECTOR_IRQ_TOUCH_DETECT), TRUE);
}