configs/nucleo-l432kc: Add support for the INA226.

configs/nucleo-l432kc/src/Makefile

@@ -60,6 +60,10 @@ ifeq ($(CONFIG_MTD_AT45DB),y)
 CSRCS += stm32_at45db.c
 endif
 
+ifeq ($(CONFIG_SENSORS_INA226),y)
+CSRCS += stm32_ina226.c
+endif
+
 ifeq ($(CONFIG_SENSORS_QENCODER),y)
 CSRCS += stm32_qencoder.c
 endif

configs/nucleo-l432kc/src/nucleo-l432kc.h

@@ -183,6 +183,18 @@ int stm32_dac7571initialize(FAR const char *devpath);
 int stm32_at45dbinitialize(int minor);
 #endif
 
+/****************************************************************************
+ * Name: stm32_ina226initialize
+ *
+ * Description:
+ *   Initialize and register the INA226 driver.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_SENSORS_INA226
+int stm32_ina226initialize(FAR const char *devpath);
+#endif
+
 /****************************************************************************
  * Name: board_timer_driver_initialize
  *

configs/nucleo-l432kc/src/stm32_appinit.c

@@ -212,6 +212,16 @@ int board_app_initialize(uintptr_t arg)
     }
 #endif
 
+#ifdef CONFIG_SENSORS_INA226
+  /* Initialize and register INA226 */
+
+  ret = stm32_ina226initialize("/dev/ina226");
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: stm32_ina226initialize() failed: %d\n", ret);
+    }
+#endif
+
 #ifdef CONFIG_TIMER
   /* Initialize and register the timer driver */
 

configs/nucleo-l432kc/src/stm32_ina226.c

@@ -0,0 +1,133 @@
+/************************************************************************************
+ * configs/nucleo-l432kc/src/stm32_ina226.c
+ *
+ *   Copyright (C) 2018 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 <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/i2c/i2c_master.h>
+#include <nuttx/sensors/ina226.h>
+#include <arch/board/board.h>
+
+#include <chip.h>
+#include <stm32l4.h>
+
+#if defined(CONFIG_I2C) && defined(CONFIG_STM32L4_I2C1) && defined(CONFIG_SENSORS_INA226) 
+
+/************************************************************************************
+ * Preprocessor definitions
+ ************************************************************************************/
+
+#if !defined(CONFIG_INA226_ADDR)
+#  define CONFIG_INA226_ADDR 0x44  /* A0 tied to ground and A1 tied to VS */
+#endif
+
+#if !defined(CONFIG_INA226_SHUNTVAL)
+#  define CONFIG_INA226_SHUNTVAL 5000
+#endif
+
+/************************************************************************************
+ * Private Data
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: stm32_ina226initialize
+ *
+ * Description:
+ *   Initialize and register the INA226 driver.
+ *
+ * Input Parameters:
+ *   devpath - The full path to the driver to register. E.g., "/dev/ina226"
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ************************************************************************************/
+
+int stm32_ina226initialize(FAR const char *devpath)
+{
+  FAR struct i2c_master_s *i2c;
+  int ret;
+
+  sninfo("Initializing INA226\n");
+
+  /* Configure D4(PA5) and D5(PA6) as input floating */
+
+  stm32l4_configgpio(GPIO_I2C1_D4);
+  stm32l4_configgpio(GPIO_I2C1_D5);
+
+  /* Get an instance of the I2C1 interface */
+
+  i2c =  stm32l4_i2cbus_initialize(1);
+  if (!i2c)
+    {
+      return -ENODEV;
+    }
+
+  /* Then initialize and register INA226 */
+
+  int config = INA226_CONFIG_AVG_4 |
+               INA226_CONFIG_VBUSCT_140US |
+               INA226_CONFIG_VSHCT_140US |
+               INA226_CONFIG_MODE_SBCONT;
+
+  ret = ina226_register(devpath, i2c, CONFIG_INA226_ADDR,
+                  CONFIG_INA226_SHUNTVAL, config);
+
+  if (ret < 0)
+    {
+      snerr("ERROR: ina226_register failed: %d\n", ret);
+      goto error;
+    }
+
+  return OK;
+
+error:
+  (void)stm32l4_i2cbus_uninitialize(i2c);
+  return ret;
+}
+
+#endif /* defined(CONFIG_I2C) && defined(CONFIG_STM32_I2C1) && defined(CONFIG_SENSORS_INA226) */