b0a0a39f7a
apps/examples/ft80x: Fix some size calculations. Add option to disable primitive tests... just too boring to have to watch over and over again.
apps/graphics/ft80x: Fix a typo in backlight fade logic; Fix error in formmatted display light debug dump output.
apps/graphics/ft80x: Fix some warnings when debug features are enabled.
133 lines
4.3 KiB
C
133 lines
4.3 KiB
C
/****************************************************************************
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* apps/graphics/ft80x/ft80x_backlight.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_backlight_set
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*
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* Description:
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* Set the backlight intensity via the PWM duty.
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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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* duty - The new backlight duty (as a percentage 0..100)
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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_backlight_set(int fd, uint8_t duty)
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{
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uint16_t duty128;
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int ret;
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DEBUGASSERT(duty <= 100);
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/* 0% corresponds to the value 0, but 100% corresponds to the value 128 */
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duty128 = ((uint16_t)duty << 7) / 100;
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/* Perform the IOCTL to set the backlight duty */
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ret = ft80x_putreg8(fd, FT80X_REG_PWM_DUTY, (uint8_t)duty128);
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if (ret < 0)
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{
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ft80x_err("ERROR: ft80x_putreg8 failed: %d\n", ret);
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}
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return ret;
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}
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/****************************************************************************
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* Name: ft80x_backlight_fade
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*
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* Description:
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* Change the backlight intensity with a controllable fade.
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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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* duty - The terminal duty (as a percentage 0..100)
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* delay - The duration of the fade in milliseconds (10..16700)
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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_backlight_fade(int fd, uint8_t duty, uint16_t delay)
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{
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struct ft80x_fade_s fade;
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int ret;
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DEBUGASSERT(duty <= 100);
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/* Perform the IOCTL to perform the fade */
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fade.duty = duty;
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fade.delay = delay;
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ret = ioctl(fd, FT80X_IOC_FADE, (unsigned long)((uintptr_t)&fade));
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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_FADE) failed: %d\n", errcode);
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ret = -errcode;
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}
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return ret;
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}
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