110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
/****************************************************************************
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* boards/arm/stm32/olimex-stm32-e407/src/stm32_dac.c
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*
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* Copyright (C) 2019 Acutronics Robotics All rights reserved.
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* Authors: Acutronics Robotics (Juan Flores) <juan@erlerobotics.com>
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* Base on the work of: Juha Niskanen <juha.niskanen@haltian.com>
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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 <errno.h>
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#include <debug.h>
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#include <nuttx/board.h>
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#include <nuttx/analog/dac.h>
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#include "stm32_dac.h"
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#include "olimex-stm32-e407.h"
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#include <arch/board/board.h>
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#if defined(CONFIG_DAC)
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static struct dac_dev_s *g_dac;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_dac_setup
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*
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* Description:
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* Initialize and register the DAC0 of the microcontroller.
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*
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* Input parameters:
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* devpath - The full path to the driver to register. E.g., "/dev/dac0"
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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 stm32_dac_setup(void)
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{
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static bool initialized = false;
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if (!initialized)
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{
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int ret;
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g_dac = stm32_dacinitialize(1);
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if (g_dac == NULL)
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{
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aerr("ERROR: Failed to get DAC interface\n");
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return -ENODEV;
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}
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/* Register the DAC driver at "/dev/dac0" */
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ret = dac_register("/dev/dac0", g_dac);
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if (ret < 0)
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{
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aerr("ERROR: dac_register failed: %d\n", ret);
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return ret;
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}
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initialized = true;
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}
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return OK;
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}
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#endif
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