dd20c1355b
Gregory Nutt is the copyright holder for those files and he has submitted the SGA as a result we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
/****************************************************************************
|
|
* apps/graphics/ft80x/ft80x_ramdl.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/ioctl.h>
|
|
#include <stdint.h>
|
|
#include <unistd.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/lcd/ft80x.h>
|
|
|
|
#include "graphics/ft80x.h"
|
|
#include "ft80x.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: ft80x_ramdl_rewind
|
|
*
|
|
* Description:
|
|
* Reset to the start of RAM DL memory
|
|
*
|
|
* Input Parameters:
|
|
* fd - The file descriptor of the FT80x device. Opened by the caller
|
|
* with write access.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success. A negated errno value on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int ft80x_ramdl_rewind(int fd)
|
|
{
|
|
off_t pos;
|
|
|
|
/* Reposition the VFSso that subsequent writes will be to the beginning of
|
|
* the hardware display list.
|
|
*/
|
|
|
|
pos = lseek(fd, 0, SEEK_SET);
|
|
if (pos < 0)
|
|
{
|
|
int errcode = errno;
|
|
ft80x_err("ERROR: lseek failed: %d\n", errcode);
|
|
return -errcode;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: ft80x_ramdl_append
|
|
*
|
|
* Description:
|
|
* Append new display list data to RAM DL
|
|
*
|
|
* Input Parameters:
|
|
* fd - The file descriptor of the FT80x device. Opened by the caller
|
|
* with write access.
|
|
* data - A pointer to the start of the data to be written.
|
|
* len - The number of bytes to be written.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success. A negated errno value on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int ft80x_ramdl_append(int fd, FAR const void *data, size_t len)
|
|
{
|
|
size_t nwritten;
|
|
|
|
DEBUGASSERT(data != NULL && ((uintptr_t)data & 3) == 0 &&
|
|
len > 0 && (len & 3) == 0);
|
|
|
|
/* Write the aligned data directly to the FT80x hardware display list.
|
|
*
|
|
* NOTE: We have inside knowledge that the write will complete in a
|
|
* single operation so that no piecewise writes will ever be necessary.
|
|
*/
|
|
|
|
nwritten = write(fd, data, len);
|
|
if (nwritten < 0)
|
|
{
|
|
int errcode = errno;
|
|
ft80x_err("ERROR: write failed: %d\n", errcode);
|
|
return -errcode;
|
|
}
|
|
|
|
DEBUGASSERT(nwritten == len);
|
|
return OK;
|
|
}
|