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139 lines
4.5 KiB
139 lines
4.5 KiB
/**************************************************************************** |
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* |
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* Copyright (C) 2012 PX4 Development Team. All rights reserved. |
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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 PX4 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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* @file px4fmu_adc.c |
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* |
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* Board-specific ADC functions. |
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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 <stdio.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 "stm32_adc.h" |
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#include "px4fmu_internal.h" |
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#define ADC3_NCHANNELS 4 |
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/************************************************************************************ |
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* Private Data |
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************************************************************************************/ |
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/* The PX4FMU board has four ADC channels: ADC323 IN10-13 |
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*/ |
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/* Identifying number of each ADC channel: Variable Resistor. */ |
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#ifdef CONFIG_STM32_ADC3 |
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static const uint8_t g_chanlist[ADC3_NCHANNELS] = {10, 11};// , 12, 13}; ADC12 and 13 are used by MPU on v1.5 boards |
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/* Configurations of pins used byte each ADC channels */ |
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static const uint32_t g_pinlist[ADC3_NCHANNELS] = {GPIO_ADC3_IN10, GPIO_ADC3_IN11}; // ADC12 and 13 are used by MPU on v1.5 boards, GPIO_ADC3_IN12, GPIO_ADC3_IN13}; |
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#endif |
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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: adc_devinit |
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* |
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* Description: |
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* All STM32 architectures must provide the following interface to work with |
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* examples/adc. |
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* |
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************************************************************************************/ |
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int adc_devinit(void) |
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{ |
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static bool initialized = false; |
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struct adc_dev_s *adc[ADC3_NCHANNELS]; |
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int ret; |
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int i; |
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/* Check if we have already initialized */ |
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if (!initialized) { |
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char name[11]; |
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for (i = 0; i < ADC3_NCHANNELS; i++) { |
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stm32_configgpio(g_pinlist[i]); |
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} |
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for (i = 0; i < 1; i++) { |
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/* Configure the pins as analog inputs for the selected channels */ |
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//stm32_configgpio(g_pinlist[i]); |
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/* Call stm32_adcinitialize() to get an instance of the ADC interface */ |
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//multiple channels only supported with dma! |
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adc[i] = stm32_adcinitialize(3, (g_chanlist), 4); |
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if (adc == NULL) { |
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adbg("ERROR: Failed to get ADC interface\n"); |
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return -ENODEV; |
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} |
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/* Register the ADC driver at "/dev/adc0" */ |
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sprintf(name, "/dev/adc%d", i); |
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ret = adc_register(name, adc[i]); |
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if (ret < 0) { |
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adbg("adc_register failed for adc %s: %d\n", name, ret); |
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return ret; |
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} |
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} |
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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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