779197c63e
by this command: git ls-files -z | while IFS= read -rd '' f; do tail -c1 < "$f" | read -r _ || echo >> "$f"; done
132 lines
4.3 KiB
C
132 lines
4.3 KiB
C
/****************************************************************************
|
|
* apps/graphics/ft80x/ft80x_ramdl.c
|
|
*
|
|
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* 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 OWNER 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* 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;
|
|
}
|