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configs/xmc4500-relax/src/xmc4_max6675.c

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+/************************************************************************************
+ * configs/xmc4500-relax/src/xmc4_max6675.c
+ *
+ *   Copyright (C) 2018 Alan Carvalho de Assis. All rights reserved.
+ *   Author: Alan Carvalho de Assis <acassis@gmail.com>
+ *
+ * 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/spi/spi.h>
+#include <nuttx/sensors/max6675.h>
+
+#include "xmc4_spi.h"
+#include "xmc4500-relax.h"
+
+#if defined(CONFIG_SPI) && defined(CONFIG_SENSORS_MAX6675) && defined(CONFIG_XMC4_SPI2)
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+#define MAX6675_SPI_PORTNO 2   /* On SPI2 */
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: xmc4_max6675initialize
+ *
+ * Description:
+ *   Initialize and register the MAX6675 Temperature Sensor driver.
+ *
+ * Input Parameters:
+ *   devpath - The full path to the driver to register. E.g., "/dev/temp0"
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ************************************************************************************/
+
+int xmc4_max6675initialize(FAR const char *devpath)
+{
+  FAR struct spi_dev_s *spi;
+  int ret;
+
+  spi = xmc4_spibus_initialize(MAX6675_SPI_PORTNO);
+
+  if (!spi)
+    {
+      return -ENODEV;
+    }
+
+  /* Then register the barometer sensor */
+
+  ret = max6675_register(devpath, spi);
+  if (ret < 0)
+    {
+      snerr("ERROR: Error registering MAX6675\n");
+    }
+
+  return ret;
+}
+
+#endif /* CONFIG_SPI && CONFIG_SENSORS_MAX6675 */
+