Nucleo-144 ADC

configs/nucleo-144/include/board.h

@@ -311,6 +311,13 @@
  * USART8: has no remap
  */
 
+/* DMA channels *************************************************************/
+/* ADC */
+
+#define ADC1_DMA_CHAN DMAMAP_ADC1_1
+#define ADC2_DMA_CHAN DMAMAP_ADC2_1
+#define ADC3_DMA_CHAN DMAMAP_ADC3_1
+
 /* SPI
  *
  *

configs/nucleo-144/src/Makefile

@@ -56,6 +56,9 @@ endif
 ifeq ($(CONFIG_SPI),y)
 CSRCS += stm32_spi.c
 endif
+ifeq ($(CONFIG_ADC),y)
+CSRCS += stm32_adc.c
+endif
 
 ifeq ($(HAVE_SDIO),y)
 CSRCS += stm32_sdio.c

configs/nucleo-144/src/nucleo-144.h

@@ -185,5 +185,19 @@ void stm32_dma_alloc_init(void);
 int stm32_dma_alloc_init(void);
 #endif
 
+/****************************************************************************
+ * Name: stm32_adc_initialize
+ *
+ * Description:
+ *   Called at application startup time to initialize the ADC functionality.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_ADC
+int board_adc_initialize(void);
+#endif
+
+
+
 #endif /* __ASSEMBLY__ */
 #endif /* __CONFIGS_NUCLEO_144_SRC_NUCLEO_144_H */

configs/nucleo-144/src/stm32_adc.c

@@ -0,0 +1,188 @@
+/************************************************************************************
+ * configs/nucleo-144/src/stm32_adc.c
+ *
+ *   Copyright (C) 2016 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 <nuttx/config.h>
+
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <nuttx/analog/adc.h>
+#include <arch/board/board.h>
+
+#include "chip.h"
+#include "stm32_gpio.h"
+#include "stm32_adc.h"
+#include "nucleo-144.h"
+
+#ifdef CONFIG_ADC
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/* Configuration ********************************************************************/
+/* Up to 3 ADC interfaces are supported */
+
+#if STM32F7_NADC < 3
+#  undef CONFIG_STM32F7_ADC3
+#endif
+
+#if STM32F7_NADC < 2
+#  undef CONFIG_STM32F7_ADC2
+#endif
+
+#if STM32F7_NADC < 1
+#  undef CONFIG_STM32F7_ADC1
+#endif
+
+#if defined(CONFIG_STM32F7_ADC1) || defined(CONFIG_STM32F7_ADC2) || defined(CONFIG_STM32F7_ADC3)
+#ifndef CONFIG_STM32F7_ADC1
+#  warning "Channel information only available for ADC1"
+#endif
+
+/* The number of ADC channels in the conversion list */
+
+#define ADC1_NCHANNELS 1
+
+/************************************************************************************
+ * Private Data
+ ************************************************************************************/
+/* The Olimex STM32-P405 has a 10 Kohm potentiometer AN_TR connected to PC0
+ * ADC123_IN10
+ */
+
+/* Identifying number of each ADC channel: Variable Resistor.
+ *
+ * {1,  2,  3, 4,  5,  6, 7,  8,  9, 10, 11, 12, 13, 15};
+ */
+
+#ifdef CONFIG_STM32F7_ADC1
+static const uint8_t  g_chanlist[ADC1_NCHANNELS] = {1};
+
+/* Configurations of pins used byte each ADC channels
+ *
+ * {GPIO_ADC1_IN1,  GPIO_ADC1_IN2,  GPIO_ADC1_IN3, GPIO_ADC1_IN4,  GPIO_ADC1_IN5, 
+ *  GPIO_ADC1_IN6,  GPIO_ADC1_IN7,  GPIO_ADC1_IN8,  GPIO_ADC1_IN9, GPIO_ADC1_IN10,
+ *  GPIO_ADC1_IN11, GPIO_ADC1_IN12, GPIO_ADC1_IN13, GPIO_ADC1_IN15};
+ */
+
+static const uint32_t g_pinlist[ADC1_NCHANNELS]  = {GPIO_ADC1_IN0};
+#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)
+{
+  return board_adc_initialize();
+}
+
+/************************************************************************************
+ * Name: stm32_adc_initialize
+ *
+ * Description:
+ *   Called at application startup time to initialize the ADC functionality.
+ *
+ ************************************************************************************/
+
+int board_adc_initialize(void)
+{
+#ifdef CONFIG_STM32F7_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_adc_initialize(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_STM32F7_ADC1 || CONFIG_STM32F7_ADC2 || CONFIG_STM32F7_ADC3 */
+#endif /* CONFIG_ADC */