108 lines
3.6 KiB
C
108 lines
3.6 KiB
C
/****************************************************************************
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* drivers/input/uinput.c
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <debug.h>
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#include <errno.h>
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#include <stdio.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/input/touchscreen.h>
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#include <nuttx/input/uinput.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define UINPUT_NAME_SIZE 32
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static ssize_t uinput_touch_write(FAR struct touch_lowerhalf_s *lower,
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FAR const char *buffer, size_t buflen);
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: uinput_touch_write
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****************************************************************************/
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static ssize_t uinput_touch_write(FAR struct touch_lowerhalf_s *lower,
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FAR const char *buffer, size_t buflen)
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{
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FAR const struct touch_sample_s *sample;
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sample = (FAR const struct touch_sample_s *)buffer;
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if (sample == NULL)
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{
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return -EINVAL;
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}
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touch_event(lower->priv, sample);
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return buflen;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: uinput_touch_initialize
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*
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* Description:
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* Initialized the uinput touchscreen device
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*
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* Input Parameters:
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* name: Touchscreen devices name
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* maxpoint: Maximum number of touch points supported.
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* buff_nums: Number of the touch points structure.
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*
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* Returned Value:
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* Zero is returned on success. Otherwise, a negated errno value is
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* returned to indicate the nature of the failure.
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*
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****************************************************************************/
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int uinput_touch_initialize(FAR const char *name, int maxpoint, int buffnums)
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{
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char devname[UINPUT_NAME_SIZE];
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FAR struct touch_lowerhalf_s *lower;
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lower = kmm_malloc(sizeof(struct touch_lowerhalf_s));
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if (!lower)
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{
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return -ENOMEM;
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}
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/* Regiest Touchscreen device */
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lower->write = uinput_touch_write;
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lower->maxpoint = maxpoint;
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snprintf(devname, UINPUT_NAME_SIZE, "/dev/%s", name);
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return touch_register(lower, devname, buffnums);
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}
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