/**************************************************************************** * boards/arm/stm32h7/nucleo-h743zi/src/stm32_adc.c * * Copyright (C) 2016, 2019 Gregory Nutt. All rights reserved. * Authors: Gregory Nutt * David Sidrane * * 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 "chip.h" #include "stm32_gpio.h" #include "stm32_adc.h" #include "nucleo-h743zi.h" #ifdef CONFIG_ADC /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Configuration ************************************************************/ /* Up to 3 ADC interfaces are supported */ #if defined(CONFIG_STM32H7_ADC1) || defined(CONFIG_STM32H7_ADC2) || defined(CONFIG_STM32H7_ADC3) #ifndef CONFIG_STM32H7_ADC1 # warning "Channel information only available for ADC1" #endif /* The number of ADC channels in the conversion list */ #define ADC1_NCHANNELS 5 #define ADC3_NCHANNELS 1 /**************************************************************************** * Private Data ****************************************************************************/ #ifdef CONFIG_STM32H7_ADC1 /* Identifying number of each ADC channel: Variable Resistor. * * ADC1: {5, 10, 12, 13, 15}; */ static const uint8_t g_adc1_chanlist[ADC1_NCHANNELS] = {5, 10, 12, 13, 15}; /* Configurations of pins used by each ADC channels * * ADC1: {GPIO_ADC12_INP5, GPIO_ADC123_INP10, GPIO_ADC123_INP12, GPIO_ADC12_INP13, * GPIO_ADC12_INP15}; */ static const uint32_t g_adc1_pinlist[ADC1_NCHANNELS] = {GPIO_ADC12_INP5, \ GPIO_ADC123_INP10, \ GPIO_ADC123_INP12, \ GPIO_ADC12_INP13, \ GPIO_ADC12_INP15}; #endif #ifdef CONFIG_STM32H7_ADC3 /* Identifying number of each ADC channel: Variable Resistor. * * ADC3: {6,}; */ static const uint8_t g_adc3_chanlist[ADC1_NCHANNELS] = {6}; /* Configurations of pins used by each ADC channels * * * ADC3: {GPIO_ADC3_INP6} */ static const uint32_t g_adc3_pinlist[ADC3_NCHANNELS] = {GPIO_ADC3_INP6}; #endif /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: stm32_adc_setup * * Description: * Initialize ADC and register the ADC driver. * ****************************************************************************/ int stm32_adc_setup(void) { #if defined(CONFIG_STM32H7_ADC1) || defined(CONFIG_STM32H7_ADC3) static bool initialized = false; struct adc_dev_s *adc; int ret; int i; char devname[] = "/dev/adc0"; /* Check if we have already initialized */ if (!initialized) { #endif #if defined(CONFIG_STM32H7_ADC1) /* Configure the pins as analog inputs for the selected channels */ for (i = 0; i < ADC1_NCHANNELS; i++) { if (g_adc1_pinlist[i] != 0) { stm32_configgpio(g_adc1_pinlist[i]); } } /* Call stm32_adcinitialize() to get an instance of the ADC interface */ adc = stm32h7_adc_initialize(1, g_adc1_chanlist, ADC1_NCHANNELS); if (adc == NULL) { aerr("ERROR: Failed to get ADC1 interface\n"); return -ENODEV; } /* Register the ADC driver at "/dev/adc0" */ ret = adc_register(devname, adc); if (ret < 0) { aerr("ERROR: adc_register(%s) failed: %d\n", devname, ret); return ret; } devname[8]++; #endif #if defined(CONFIG_STM32H7_ADC3) /* Configure the pins as analog inputs for the selected channels */ for (i = 0; i < ADC3_NCHANNELS; i++) { if (g_adc3_pinlist[i] != 0) { stm32_configgpio(g_adc3_pinlist[i]); } } /* Call stm32_adcinitialize() to get an instance of the ADC interface */ adc = stm32h7_adc_initialize(3, g_adc3_chanlist, ADC3_NCHANNELS); if (adc == NULL) { aerr("ERROR: Failed to get ADC3 interface\n"); return -ENODEV; } /* Register the ADC driver at "/dev/adc0 or 1" */ ret = adc_register(devname, adc); if (ret < 0) { aerr("ERROR: adc_register(%s) failed: %d\n", devname, ret); return ret; } #endif #if defined(CONFIG_STM32H7_ADC1) || defined(CONFIG_STM32H7_ADC3) /* Now we are initialized */ initialized = true; } return OK; #else return -ENOSYS; #endif } #endif /* CONFIG_STM32H7_ADC1 || CONFIG_STM32H7_ADC2 || CONFIG_STM32H7_ADC3 */ #endif /* CONFIG_ADC */