Diff: touchpanel/fsl_ft5406.cpp

Revision:

0:c107a6f8c368

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/touchpanel/fsl_ft5406.cpp	Wed Apr 11 20:46:55 2018 +0000
@@ -0,0 +1,201 @@
+/*
+ * The Clear BSD License
+ * Copyright (c) 2016, Freescale Semiconductor, Inc.
+ * Copyright 2016-2017 NXP
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted (subject to the limitations in the disclaimer below) provided
+ * that the following conditions are met:
+ *
+ * o Redistributions of source code must retain the above copyright notice, this list
+ *   of conditions and the following disclaimer.
+ *
+ * o Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ *
+ * o Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from this
+ *   software without specific prior written permission.
+ *
+ * NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "fsl_common.h"
+//#include "fsl_debug_console.h"
+#include "fsl_i2c.h"
+#include "fsl_ft5406.h"
+
+typedef struct _ft5406_touch_point
+{
+    uint8_t XH;
+    uint8_t XL;
+    uint8_t YH;
+    uint8_t YL;
+    uint8_t RESERVED[2];
+} ft5406_touch_point_t;
+
+typedef struct _ft5406_touch_data
+{
+    uint8_t GEST_ID;
+    uint8_t TD_STATUS;
+    ft5406_touch_point_t TOUCH[FT5406_MAX_TOUCHES];
+} ft5406_touch_data_t;
+
+#define TOUCH_POINT_GET_EVENT(T) ((touch_event_t)((T).XH >> 6))
+#define TOUCH_POINT_GET_ID(T) ((T).YH >> 4)
+#define TOUCH_POINT_GET_X(T) ((((T).XH & 0x0f) << 8) | (T).XL)
+#define TOUCH_POINT_GET_Y(T) ((((T).YH & 0x0f) << 8) | (T).YL)
+
+status_t FT5406_Init(ft5406_handle_t *handle, I2C_Type *base)
+{
+    i2c_master_transfer_t *xfer = &(handle->xfer);
+    status_t status;
+    uint8_t mode;
+
+    assert(handle);
+    assert(base);
+
+    if (!handle || !base)
+    {
+        return kStatus_InvalidArgument;
+    }
+
+    handle->base = base;
+
+    /* clear transfer structure and buffer */
+    memset(xfer, 0, sizeof(*xfer));
+    memset(handle->touch_buf, 0, FT5406_TOUCH_DATA_LEN);
+
+    /* set device mode to normal operation */
+    mode = 0;
+    xfer->slaveAddress = 0x38;
+    xfer->direction = kI2C_Write;
+    xfer->subaddress = 0;
+    xfer->subaddressSize = 1;
+    xfer->data = &mode;
+    xfer->dataSize = 1;
+    xfer->flags = kI2C_TransferDefaultFlag;
+
+    status = I2C_MasterTransferBlocking(handle->base, &handle->xfer);
+
+    /* prepare transfer structure for reading touch data */
+    xfer->slaveAddress = 0x38;
+    xfer->direction = kI2C_Read;
+    xfer->subaddress = 1;
+    xfer->subaddressSize = 1;
+    xfer->data = handle->touch_buf;
+    xfer->dataSize = FT5406_TOUCH_DATA_LEN;
+    xfer->flags = kI2C_TransferDefaultFlag;
+
+    return status;
+}
+
+status_t FT5406_Denit(ft5406_handle_t *handle)
+{
+    assert(handle);
+
+    if (!handle)
+    {
+        return kStatus_InvalidArgument;
+    }
+
+    handle->base = NULL;
+    return kStatus_Success;
+}
+
+status_t FT5406_ReadTouchData(ft5406_handle_t *handle)
+{
+    assert(handle);
+
+    if (!handle)
+    {
+        return kStatus_InvalidArgument;
+    }
+
+    return I2C_MasterTransferBlocking(handle->base, &handle->xfer);
+}
+
+status_t FT5406_GetSingleTouch(ft5406_handle_t *handle, touch_event_t *touch_event, int *touch_x, int *touch_y)
+{
+    status_t status;
+    touch_event_t touch_event_local;
+
+    status = FT5406_ReadTouchData(handle);
+
+    if (status == kStatus_Success)
+    {
+        ft5406_touch_data_t *touch_data = (ft5406_touch_data_t *)(void *)(handle->touch_buf);
+
+        if (touch_event == NULL)
+        {
+            touch_event = &touch_event_local;
+        }
+        *touch_event = TOUCH_POINT_GET_EVENT(touch_data->TOUCH[0]);
+
+        /* Update coordinates only if there is touch detected */
+        if ((*touch_event == kTouch_Down) || (*touch_event == kTouch_Contact))
+        {
+            if (touch_x)
+            {
+                *touch_x = TOUCH_POINT_GET_X(touch_data->TOUCH[0]);
+            }
+            if (touch_y)
+            {
+                *touch_y = TOUCH_POINT_GET_Y(touch_data->TOUCH[0]);
+            }
+        }
+    }
+
+    return status;
+}
+
+status_t FT5406_GetMultiTouch(ft5406_handle_t *handle, int *touch_count, touch_point_t touch_array[FT5406_MAX_TOUCHES])
+{
+    status_t status;
+
+    status = FT5406_ReadTouchData(handle);
+
+    if (status == kStatus_Success)
+    {
+        ft5406_touch_data_t *touch_data = (ft5406_touch_data_t *)(void *)(handle->touch_buf);
+        int i;
+
+        /* Decode number of touches */
+        if (touch_count)
+        {
+            *touch_count = touch_data->TD_STATUS;
+        }
+
+        /* Decode valid touch points */
+        for (i = 0; i < touch_data->TD_STATUS; i++)
+        {
+            touch_array[i].TOUCH_ID = TOUCH_POINT_GET_ID(touch_data->TOUCH[i]);
+            touch_array[i].TOUCH_EVENT = TOUCH_POINT_GET_EVENT(touch_data->TOUCH[i]);
+            touch_array[i].TOUCH_X = TOUCH_POINT_GET_X(touch_data->TOUCH[i]);
+            touch_array[i].TOUCH_Y = TOUCH_POINT_GET_Y(touch_data->TOUCH[i]);
+        }
+
+        /* Clear vacant elements of touch_array */
+        for (; i < FT5406_MAX_TOUCHES; i++)
+        {
+            touch_array[i].TOUCH_ID = 0;
+            touch_array[i].TOUCH_EVENT = kTouch_Reserved;
+            touch_array[i].TOUCH_X = 0;
+            touch_array[i].TOUCH_Y = 0;
+        }
+    }
+
+    return status;
+}