diff --git a/configs/stm32f746g-disco/src/Makefile b/configs/stm32f746g-disco/src/Makefile index 313c89275e8..12dadaf672c 100644 --- a/configs/stm32f746g-disco/src/Makefile +++ b/configs/stm32f746g-disco/src/Makefile @@ -52,6 +52,10 @@ ifeq ($(CONFIG_LIB_BOARDCTL),y) CSRCS += stm32_appinitialize.c endif +ifeq ($(CONFIG_ADC),y) +CSRCS += stm32_adc.c +endif + ifeq ($(CONFIG_ARCH_FPU),y) CSRCS += stm32_ostest.c endif diff --git a/configs/stm32f746g-disco/src/stm32_adc.c b/configs/stm32f746g-disco/src/stm32_adc.c new file mode 100644 index 00000000000..46dfb1c5885 --- /dev/null +++ b/configs/stm32f746g-disco/src/stm32_adc.c @@ -0,0 +1,165 @@ +/**************************************************************************** + * configs/stm32f334-disco/src/stm32_adc.c + * + * Copyright (C) 2017 Gregory Nutt. All rights reserved. + * Author: Ivan Ucherdzhiev + * + * 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_gpio.h" +#include "stm32_adc.h" + +#ifndef CONFIG_STM32F7_ADC3 +# error "Only ADC3 channels are availiable on the arduino header of the board" +#endif + +#if defined(CONFIG_ADC) && defined(CONFIG_STM32F7_ADC3) + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/* Configuration ************************************************************/ + +/* If DMA support is not enabled, then only a single channel + * can be sampled. Otherwise, data overruns would occur. + */ + +#ifdef ADC_HAVE_DMA +# define ADC3_NCHANNELS 6 +#else +# define ADC3_NCHANNELS 1 +#endif + +/* The number of ADC channels in the conversion list */ +/* TODO DMA */ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/* Identifying number of each ADC channel (even if NCHANNELS is less ) */ + +static const uint8_t g_chanlist[6] = +{ + 0, + 4, + 5, + 6, + 7, + 8 +}; + +/* Configurations of pins used by each ADC channel */ + +static const uint32_t g_pinlist[6] = +{ + GPIO_ADC3_IN0, /* PA0/A0 */ + GPIO_ADC3_IN4, /* PF/A1 */ + GPIO_ADC3_IN5, /* PF7/A3 */ + GPIO_ADC3_IN6, /* PF8/A0 */ + GPIO_ADC3_IN7, /* PF9/A1 */ + GPIO_ADC3_IN8 /* PF10/A3 */ +}; + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: stm32_adc_setup + * + * Description: + * Initialize ADC and register the ADC driver. + * + ****************************************************************************/ + + int stm32_adc_setup(void) + { + #ifdef CONFIG_STM32F7_ADC3 + static bool initialized = false; + 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 < ADC3_NCHANNELS; i++) + { + stm32_configgpio(g_pinlist[i]); + } + + /* Call stm32_adcinitialize() to get an instance of the ADC interface */ + + adc = stm32_adc_initialize(3, g_chanlist, ADC3_NCHANNELS); + if (adc == NULL) + { + aerr("ERROR: Failed to get ADC interface\n"); + return -ENODEV; + } + + /* Register the ADC driver at "/dev/adc0" */ + + ret = adc_register("/dev/adc3", adc); + if (ret < 0) + { + aerr("ERROR: adc_register failed: %d\n", ret); + return ret; + } + + /* Now we are initialized */ + + initialized = true; + } + + return OK; + #else + return -ENOSYS; + #endif + } + +#endif /* (CONFIG_ADC) && (CONFIG_STM32F7_ADC3) */ diff --git a/configs/stm32f746g-disco/src/stm32f746g-disco.h b/configs/stm32f746g-disco/src/stm32f746g-disco.h index 76974ec315b..ed043cff14b 100644 --- a/configs/stm32f746g-disco/src/stm32f746g-disco.h +++ b/configs/stm32f746g-disco/src/stm32f746g-disco.h @@ -1,7 +1,7 @@ /**************************************************************************************************** * configs/stm32f746g-disco/src/stm32f746g-disco.h * - * Copyright (C) 2015 Gregory Nutt. All rights reserved. + * Copyright (C) 2015, 2017 Gregory Nutt. All rights reserved. * Authors: Gregory Nutt * * Redistribution and use in source and binary forms, with or without @@ -120,6 +120,18 @@ int stm32_bringup(void); +/**************************************************************************************************** + * Name: stm32_adc_setup + * + * Description: + * Initialize ADC and register the ADC driver. + * + ****************************************************************************************************/ + +#ifdef CONFIG_ADC +int stm32_adc_setup(void); +#endif + /**************************************************************************************************** * Name: stm32_spidev_initialize * @@ -143,5 +155,5 @@ void arch_sporadic_initialize(void); #endif #endif /* __ASSEMBLY__ */ -#endif /* __CONFIGS_STM32F746G_DISCO_SRC_STM32F746G_DISCO_H */ +#endif /* __CONFIGS_STM32F746G_DISCO_SRC_STM32F746G_DISCO_H */