Add driver for LM-75 temperature sensor

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3947 42af7a65-404d-4744-a932-0658087f49c3

configs/stm3210e-eval/include/board.h

@@ -255,6 +255,42 @@ EXTERN xcpt_t up_irqbutton(int id, xcpt_t irqhandler);
 EXTERN void stm3210e_lcdclear(uint16_t color);
 #endif
 
+/************************************************************************************
+ * Name: stm32_lm75initialize
+ *
+ * Description:
+ *   Initialize and register the LM-75 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.
+ *
+ ************************************************************************************/
+
+#if defined(CONFIG_I2C) && defined(CONFIG_I2C_LM75) && defined(CONFIG_STM32_I2C1)
+EXTERN int stm32_lm75initialize(FAR const char *devpath);
+#endif
+
+/************************************************************************************
+ * Name: stm32_lm75attach
+ *
+ * Description:
+ *   Attach the LM-75 interrupt handler
+ *
+ * Input parameters:
+ *   irqhandler - the LM-75 interrupt handler
+ *
+ * Returned Value:
+ *   The previous LM-75 interrupt handler
+ *
+ ************************************************************************************/
+
+#if defined(CONFIG_I2C) && defined(CONFIG_I2C_LM75) && defined(CONFIG_STM32_I2C1)
+EXTERN xcpt_t stm32_lm75attach(xcpt_t irqhandler);
+#endif
+
 #undef EXTERN
 #if defined(__cplusplus)
 }

configs/stm3210e-eval/src/Makefile

@@ -56,6 +56,10 @@ ifeq ($(CONFIG_USBSTRG),y)
 CSRCS		+= up_usbstrg.c
 endif
 
+ifeq ($(CONFIG_I2C_LM75),y)
+CSRCS		+= up_lm75.c
+endif
+
 COBJS		= $(CSRCS:.c=$(OBJEXT))
 
 SRCS		= $(ASRCS) $(CSRCS)

configs/stm3210e-eval/src/up_lm75.c

@@ -0,0 +1,128 @@
+/************************************************************************************
+ * configs/stm3210e-eval/src/up_lm75.c
+ * arch/arm/src/board/up_lm75.c
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 <nuttx/i2c.h>
+#include <nuttx/sensors/lm75.h>
+
+#include "stm32.h"
+#include "stm32_i2c.h"
+#include "stm3210e-internal.h"
+
+#if defined(CONFIG_I2C) && defined(CONFIG_I2C_LM75) && defined(CONFIG_STM32_I2C1)
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: stm32_lm75initialize
+ *
+ * Description:
+ *   Initialize and register the LM-75 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 stm32_lm75initialize(FAR const char *devpath)
+{
+  FAR struct i2c_dev_s *i2c;
+  int ret;
+
+  /* Configure PB.5 as Input pull-up.  This pin can be used as a temperature
+   * sensor interrupt (not fully implemented).
+   */
+
+  stm32_configgpio(GPIO_LM75_OSINT);
+
+  /* Get an instance of the I2C1 interface */
+
+  i2c =  up_i2cinitialize(1);
+  if (!i2c)
+    {
+      return -ENODEV;
+    }
+
+  /* Then register the temperature sensor */
+
+  ret = lm75_register(devpath, i2c, 0x48);
+  if (ret < 0)
+    {
+      (void)up_i2cuninitialize(i2c);
+    }
+  return ret;
+}
+
+/************************************************************************************
+ * Name: stm32_lm75attach
+ *
+ * Description:
+ *   Attach the LM-75 interrupt handler
+ *
+ * Input parameters:
+ *   irqhandler - the LM-75 interrupt handler
+ *
+ * Returned Value:
+ *   The previous LM-75 interrupt handler
+ *
+ ************************************************************************************/
+
+xcpt_t stm32_lm75attach(xcpt_t irqhandler)
+{
+  return stm32_gpiosetevent(GPIO_LM75_OSINT, true, true, true, irqhandler);
+}
+
+#endif /* CONFIG_I2C && CONFIG_I2C_LM75 && CONFIG_STM32_I2C1 */