105 lines
4.2 KiB
C
105 lines
4.2 KiB
C
/****************************************************************************
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* config/mirtoo/src/up_adc.c
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* arch/arm/src/board/up_adc.c
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*
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* Copyright (C) 2012 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 <stdbool.h>
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#include <errno.h>
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#include <debug.h>
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#include "pic32mx-internal.h"
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#include "mirtoo-internal.h"
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#ifdef CONFIG_PIC32MX_ADC
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* The Mirtoo features a PGA117 amplifier/multipexer that can be configured to
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* bring any analog signal from PORT0,.. PORT7 to pin 19 of the PIC32MX:
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*
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* --- ------------------------------------------------ ----------------------------
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* PIN PIC32 SIGNAL(s) BOARD SIGNAL/USAGE
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* --- ------------------------------------------------ ----------------------------
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* 19 PGED3/VREF+/CVREF+/AN0/C3INC/RPA0/CTED1/PMD7/RA0 AIN PGA117 Vout
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--- ------------------------------------------------ ----------------------------
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*
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* The PGA117 driver can be enabled by setting the following the nsh
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* configuration:
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*
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* CONFIG_ADC=y : Enable support for analog input devices
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* CONFIG_PIC32MX_ADC=y : Enable support the PIC32 ADC driver
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* CONFIG_SPI_OWNBUS=n : The PGA117 is *not* the only device on the bus
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* CONFIG_ADC_PGA11X=y : Enable support for the PGA117
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*
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* When CONFIG_PIC32MX_ADC=y is defined, the Mirtoo boot up logic will automatically
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* configure pin 18 (AN0) as an analog input.
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*/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pic32mx_adcinitialize
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*
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* Description:
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* Perform architecture specific ADC initialization
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*
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****************************************************************************/
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#if 0 /* Not used */
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int pic32mx_adcinitialize(void)
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{
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/* Configure the pin 19 as an analog input */
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#warning "Missing logic"
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/* Initialize the PGA117 amplifier multiplexer */
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#warning "Missing logic"
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/* Register the ADC device driver */
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#warning "Missing logic"
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return OK;
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}
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#endif
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#endif /* CONFIG_PIC32MX_ADC */ |