7c9f8ef9eb
apps/graphics/ft80x: Add support for accessing graphics ram. apps/examples/ft80x: Add more primitive graphics demos.
apps/examples/ft80x: Add a couple more demos of primitives. Use new ft80x_dl_create() to simplify.
apps/graphics/ft80x: Add ft80x_dl_create() which simplies writing of very simple display lists.
98 lines
3.6 KiB
C
98 lines
3.6 KiB
C
/****************************************************************************
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* apps/graphics/ft80x/ft80x_ramg.c
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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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/ioctl.h>
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#include <stdint.h>
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#include <assert.h>
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#include <errno.h>
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#include <nuttx/lcd/ft80x.h>
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#include "graphics/ft80x.h"
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#include "ft80x.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ft80x_ramg_write
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*
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* Description:
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* Write to graphics memory
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*
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* Input Parameters:
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* fd - The file descriptor of the FT80x device. Opened by the caller
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* with write access.
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* offset - Offset in graphics memory to write to (dest)
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* data - Pointer to a data to be written (src)
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* nbytes - The number of bytes to write to graphics memory.
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*
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* Returned Value:
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* Zero (OK) on success. A negated errno value on failure.
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*
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****************************************************************************/
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int ft80x_ramg_write(int fd, unsigned int offset, FAR const void *data,
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unsigned int nbytes)
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{
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struct ft80x_relmem_s ramg;
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int ret;
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DEBUGASSERT(data != NULL && nbytes > 0 &&
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(offset + nbytes) < FT80X_RAM_G_SIZE);
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/* Perform the IOCTL to write data to graphics memory */
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ramg.offset = offset;
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ramg.nbytes = nbytes;
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ramg.value = (FAR void *)data; /* Need to discard const qualifier */
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ret = ioctl(fd, FT80X_IOC_PUTRAMG. (unsigned long)((uintptr_t)&ramg));
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if (ret < 0)
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{
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int errcode = errno;
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ft80x_err("ERROR: ioctl(FT80X_IOC_PUTRAMG) failed: %d\n", errcode);
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return -errcode;
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}
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return OK;
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} |