/**************************************************************************** * configs/nucleo-f303re/src/stm32_adc.c * * Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. * Copyright (C) 2015 Omni Hoverboards Inc. All rights reserved. * Authors: Gregory Nutt * Paul Alexander Patience * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include "stm32.h" #if defined(CONFIG_ADC) && \ (defined(CONFIG_STM32_ADC1) || defined(CONFIG_STM32_ADC2) || \ defined(CONFIG_STM32_ADC3) || defined(CONFIG_STM32_ADC4)) /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Configuration ************************************************************/ #if defined(CONFIG_STM32_ADC1) && !defined(CONFIG_STM32_ADC2) && \ !defined(CONFIG_STM32_ADC3) && !defined(CONFIG_STM32_ADC4) # define ADC_PORT 1 #elif defined(CONFIG_STM32_ADC2) && !defined(CONFIG_STM32_ADC1) && \ !defined(CONFIG_STM32_ADC3) && !defined(CONFIG_STM32_ADC4) # define ADC_PORT 2 #elif defined(CONFIG_STM32_ADC3) && !defined(CONFIG_STM32_ADC1) && \ !defined(CONFIG_STM32_ADC2) && !defined(CONFIG_STM32_ADC4) # define ADC_PORT 3 #elif defined(CONFIG_STM32_ADC4) && !defined(CONFIG_STM32_ADC1) && \ !defined(CONFIG_STM32_ADC2) && !defined(CONFIG_STM32_ADC3) # define ADC_PORT 4 #else # error "Choose only one of ADC1, ADC2, ADC3, ADC4" #endif /* The number of ADC channels in the conversion list */ #if defined(CONFIG_STM32_ADC1) && defined(ADC1_HAVE_DMA) # define ADC_NCHANNELS 4 #elif defined(CONFIG_STM32_ADC2) && defined(ADC2_HAVE_DMA) # define ADC_NCHANNELS 3 #elif defined(CONFIG_STM32_ADC3) && defined(ADC3_HAVE_DMA) # define ADC_NCHANNELS 1 #elif defined(CONFIG_STM32_ADC4) && defined(ADC4_HAVE_DMA) # define ADC_NCHANNELS 1 #else # define ADC_NCHANNELS 1 #endif /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /**************************************************************************** * Private Data ****************************************************************************/ #if defined(CONFIG_STM32_ADC1) /* Identifying number of each ADC channel */ static const uint8_t g_chanlist[ADC_NCHANNELS] = { 1, #ifdef ADC1_HAVE_DMA 2, 6, 7, #endif }; /* Configurations of pins used by each ADC channel */ static const uint32_t g_pinlist[ADC_NCHANNELS] = { GPIO_ADC1_IN1, #ifdef ADC1_HAVE_DMA GPIO_ADC1_IN2, GPIO_ADC12_IN6, GPIO_ADC12_IN7, #endif }; #elif defined(CONFIG_STM32_ADC2) /* Identifying number of each ADC channel */ static const uint8_t g_chanlist[ADC_NCHANNELS] = { 1, #ifdef ADC2_HAVE_DMA 6, 7, #endif }; /* Configurations of pins used by each ADC channel */ static const uint32_t g_pinlist[ADC_NCHANNELS] = { GPIO_ADC2_IN1, #ifdef ADC2_HAVE_DMA GPIO_ADC12_IN6, GPIO_ADC12_IN7, #endif }; #elif defined(CONFIG_STM32_ADC3) /* Identifying number of each ADC channel */ static const uint8_t g_chanlist[ADC_NCHANNELS] = { 12, }; /* Configurations of pins used by each ADC channel */ static const uint32_t g_pinlist[ADC_NCHANNELS] = { GPIO_ADC3_IN12, }; #elif defined(CONFIG_STM32_ADC4) /* Identifying number of each ADC channel */ static const uint8_t g_chanlist[ADC_NCHANNELS] = { 3, }; /* Configurations of pins used by each ADC channel */ static const uint32_t g_pinlist[ADC_NCHANNELS] = { GPIO_ADC4_IN3, }; #endif /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: board_adc_setup * * Description: * All STM32 architectures must provide the following interface to work * with examples/adc. * ****************************************************************************/ int board_adc_setup(void) { static bool initialized = false; FAR struct adc_dev_s *adc; int ret; int i; /* Check if we have already initialized */ if (!initialized) { /* Configure the pins as analog inputs for the selected channels */ for (i = 0; i < ADC_NCHANNELS; i++) { stm32_configgpio(g_pinlist[i]); } /* Call stm32_adcinitialize() to get an instance of the ADC interface */ adc = stm32_adcinitialize(ADC_PORT, g_chanlist, ADC_NCHANNELS); if (adc == NULL) { adbg("ERROR: Failed to get ADC interface\n"); return -ENODEV; } /* Register the ADC driver at "/dev/adc0" */ ret = adc_register("/dev/adc0", adc); if (ret < 0) { adbg("adc_register failed: %d\n", ret); return ret; } /* Now we are initialized */ initialized = true; } return OK; } #endif /* CONFIG_ADC && (CONFIG_STM32_ADC1 || CONFIG_STM32_ADC2 || * CONFIG_STM32_ADC3 || CONFIG_STM32_ADC4) */