Updated STM32 ADC driver
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4189 42af7a65-404d-4744-a932-0658087f49c3
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/************************************************************************************
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* configs/stm3210e-eval/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) 2011 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 <debug.h>
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#include <nuttx/analog/adc.h>
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#include <arch/board/board.h>
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#include "chip.h"
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#include "up_arch.h"
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#include "stm3210e-internal.h"
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#ifdef CONFIG_ADC
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/************************************************************************************
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* Definitions
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************************************************************************************/
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/* Configuration ************************************************************/
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/* Up to 3 ADC interfaces are supported */
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#if STM32_NADC < 3
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# undef CONFIG_STM32_ADC3
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#endif
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#if STM32_NADC < 2
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# undef CONFIG_STM32_ADC2
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#endif
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#if STM32_NADC < 1
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# undef CONFIG_STM32_ADC1
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#endif
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#if defined(CONFIG_STM32_ADC1) || defined(CONFIG_STM32_ADC2) || defined(CONFIG_STM32_ADC3)
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/************************************************************************************
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* Private Functions
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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: stm32_boardinitialize
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*
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* Description:
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* All STM32 architectures must provide the following entry point. This entry point
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* is called early in the intitialization -- after all memory has been configured
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* and mapped but before any devices have been initialized.
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*
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************************************************************************************/
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void adc_devinit(void)
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{
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struct adc_dev_s *adc;
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int ret;
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/* Call stm32_adcinitialize() to get an instance of the ADC interface */
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#warning "Missing Logic"
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/* Register the ADC driver at "/dev/adc0" */
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ret = adc_register("/dev/adc0", adc);
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if (ret < 0)
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{
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adbg("adc_register failed: %d\n", ret);
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}
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}
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#endif /* CONFIG_STM32_ADC || CONFIG_STM32_ADC2 || CONFIG_STM32_ADC3 */
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/************************************************************************************
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* configs/stm3210e-eval/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) 2011 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 <debug.h>
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#include <nuttx/analog/adc.h>
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#include <arch/board/board.h>
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#include "chip.h"
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#include "up_arch.h"
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#include "stm3210e-internal.h"
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#ifdef CONFIG_ADC
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/************************************************************************************
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* Definitions
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************************************************************************************/
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/* Configuration ************************************************************/
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/* Up to 3 ADC interfaces are supported */
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#if STM32_NADC < 3
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# undef CONFIG_STM32_ADC3
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#endif
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#if STM32_NADC < 2
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# undef CONFIG_STM32_ADC2
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#endif
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#if STM32_NADC < 1
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# undef CONFIG_STM32_ADC1
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#endif
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#if defined(CONFIG_STM32_ADC1) || defined(CONFIG_STM32_ADC2) || defined(CONFIG_STM32_ADC3)
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/* The number of ADC channels in the conversion list */
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#define ADC_NCHANNELS 2
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/************************************************************************************
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* Private Data
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************************************************************************************/
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/* Identifying number of each ADC channel */
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static const uint8_t g_chanlist[ADC_NCHANNELS] = {14, 10};
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/* Configurations of pins used byte each ADC channels */
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static const uint32_t g_pinlist[ADC_NCHANNELS] = {GPIO_ADC1_IN14 , GPIO_ADC1_IN10};
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/************************************************************************************
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* Private Functions
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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: stm32_boardinitialize
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*
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* Description:
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* All STM32 architectures must provide the following entry point. This entry point
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* is called early in the intitialization -- after all memory has been configured
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* and mapped but before any devices have been initialized.
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*
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************************************************************************************/
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int adc_devinit(void)
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{
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struct adc_dev_s *adc;
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int ret;
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int i;
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avdbg("Entry\n");
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/* Configure the pins as analog inputs for the selected channels */^M
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for(i = 0; i < ADC_NCHANNELS; i++)
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{
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stm32_configgpio(chanlist[i]);
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}
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/* Call stm32_adcinitialize() to get an instance of the ADC interface */^M
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adc = stm32_adcinitialize(1, g_chanlist, ADC_NCHANNELS);
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/* Register the ADC driver at "/dev/adc0" */
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ret = adc_register("/dev/adc0", adc);
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if (ret < 0)
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{
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adbg("adc_register failed: %d\n", ret);
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}
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return OK;
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}
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#endif /* CONFIG_STM32_ADC || CONFIG_STM32_ADC2 || CONFIG_STM32_ADC3 */
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#endif /* CONFIG_ADC */
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