1 files changed, 180 insertions, 0 deletions

diff --git a/lib/chibios-contrib/ext/mcux-sdk/components/ft5406/fsl_ft5406.c b/lib/chibios-contrib/ext/mcux-sdk/components/ft5406/fsl_ft5406.c
new file mode 100644
index 000000000..da1695f4e
--- /dev/null
+++ b/lib/chibios-contrib/ext/mcux-sdk/components/ft5406/fsl_ft5406.c
@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 2016, Freescale Semiconductor, Inc.
+ * Copyright 2016-2019 NXP
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "fsl_common.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;
+
+        /* Check for valid number of touches - otherwise ignore touch information */
+        if (touch_data->TD_STATUS > FT5406_MAX_TOUCHES)
+        {
+            touch_data->TD_STATUS = 0;
+        }
+
+        /* 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;
+}