diff --git a/configs/stm32f103-minimum/src/Makefile b/configs/stm32f103-minimum/src/Makefile index e23d943f87..4f8b894320 100644 --- a/configs/stm32f103-minimum/src/Makefile +++ b/configs/stm32f103-minimum/src/Makefile @@ -53,6 +53,10 @@ else CSRCS += stm32_userleds.c endif +ifeq ($(CONFIG_ADC),y) +CSRCS += stm32_adc.c +endif + ifeq ($(CONFIG_DEV_GPIO),y) CSRCS += stm32_gpio.c endif diff --git a/configs/stm32f103-minimum/src/stm32_adc.c b/configs/stm32f103-minimum/src/stm32_adc.c new file mode 100644 index 0000000000..e2612f1e43 --- /dev/null +++ b/configs/stm32f103-minimum/src/stm32_adc.c @@ -0,0 +1,154 @@ +/************************************************************************************ + * configs/stm32f103-minimum/src/stm32_adc.c + * + * Copyright (C) 2017 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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_adc.h" +#include "stm32f103_minimum.h" + +#ifdef CONFIG_ADC + +/************************************************************************************ + * Pre-processor Definitions + ************************************************************************************/ + +/* Configuration ********************************************************************/ +/* Up to 2 ADC interfaces are supported */ + +#if STM32_NADC < 2 +# undef CONFIG_STM32_ADC2 +#endif + +#if STM32_NADC < 1 +# undef CONFIG_STM32_ADC1 +#endif + +#if defined(CONFIG_STM32_ADC1) || defined(CONFIG_STM32_ADC2) +#ifndef CONFIG_STM32_ADC1 +# warning "Channel information only available for ADC1" +#endif + +/* The number of ADC channels in the conversion list */ + +#define ADC1_NCHANNELS 1 + +/************************************************************************************ + * Private Data + ************************************************************************************/ + +/* Identifying number of each ADC channel to be used with Variable Resistor (Pontentiometer)*/ + +#ifdef CONFIG_STM32_ADC1 +static const uint8_t g_chanlist[ADC1_NCHANNELS] = {0}; /* ADC12_IN0 */ + +/* Configurations of pins used byte each ADC channels */ + +static const uint32_t g_pinlist[ADC1_NCHANNELS] = {GPIO_ADC12_IN0}; +#endif + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: stm32_adc_setup + * + * Description: + * Initialize ADC and register the ADC driver. + * + ************************************************************************************/ + +int stm32_adc_setup(void) +{ +#ifdef CONFIG_STM32_ADC1 + 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 < ADC1_NCHANNELS; i++) + { + stm32_configgpio(g_pinlist[i]); + } + + /* Call stm32_adcinitialize() to get an instance of the ADC interface */ + + adc = stm32_adcinitialize(1, g_chanlist, ADC1_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/adc0", 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_STM32_ADC1 || CONFIG_STM32_ADC2 || CONFIG_STM32_ADC3 */ +#endif /* CONFIG_ADC */ diff --git a/configs/stm32f103-minimum/src/stm32_bringup.c b/configs/stm32f103-minimum/src/stm32_bringup.c index 293c55e482..f8d2d7f395 100644 --- a/configs/stm32f103-minimum/src/stm32_bringup.c +++ b/configs/stm32f103-minimum/src/stm32_bringup.c @@ -292,6 +292,16 @@ int stm32_bringup(void) } #endif +#ifdef CONFIG_ADC + /* Initialize ADC and register the ADC driver. */ + + ret = stm32_adc_setup(); + if (ret < 0) + { + syslog(LOG_ERR, "ERROR: stm32_adc_setup failed: %d\n", ret); + } +#endif + #if defined(CONFIG_WL_NRF24L01) /* Initialize the NRF24L01 wireless module */ diff --git a/configs/stm32f103-minimum/src/stm32f103_minimum.h b/configs/stm32f103-minimum/src/stm32f103_minimum.h index 88a212972b..6d5c861177 100644 --- a/configs/stm32f103-minimum/src/stm32f103_minimum.h +++ b/configs/stm32f103-minimum/src/stm32f103_minimum.h @@ -187,6 +187,18 @@ int stm32_bringup(void); int stm32_gpio_initialize(void); #endif +/************************************************************************************ + * 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 *