111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/****************************************************************************
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* boards/arm/samv7/same70-qmtech/src/sam_dac.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <stdint.h>
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#include <stdbool.h>
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#include <debug.h>
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#include <errno.h>
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#include <arch/board/board.h>
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#include "arm_arch.h"
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#include "chip.h"
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#include "sam_dac.h"
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#include "same70-qmtech.h"
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#if defined(CONFIG_SAMV7_DAC0) || defined(CONFIG_SAMV7_DAC1)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sam_dacdev_initialize
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*
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* Description:
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* Called to configure DAC peripheral module and register DAC device driver
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****************************************************************************/
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int sam_dacdev_initialize(void)
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{
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static bool initialized = false;
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struct dac_dev_s *dac;
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int ret;
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/* Check if we have already initialized */
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if (!initialized)
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{
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#ifdef CONFIG_SAMV7_DAC0
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/* Get an instance of the DAC0 interface */
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dac = sam_dac_initialize(0);
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if (dac == NULL)
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{
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aerr("ERROR: Failed to get DAC0 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", 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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#endif
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#ifdef CONFIG_SAMV7_DAC1
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/* Get an instance of the DAC1 interface */
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dac = sam_dac_initialize(1);
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if (dac == NULL)
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{
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aerr("ERROR: Failed to get DAC1 interface\n");
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return -ENODEV;
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}
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/* Register the DAC driver at "/dev/dac1" */
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ret = dac_register("/dev/dac1", 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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#endif
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/* Now we are initialized */
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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 /* CONFIG_SAMV7_DAC0 || CONFIG_SAMV7_DAC1 */
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