129 lines
4.4 KiB
C
129 lines
4.4 KiB
C
/************************************************************************************
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* configs/stm3210e-eval/src/up_lm75.c
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* arch/arm/src/board/up_lm75.c
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include <errno.h>
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#include <nuttx/i2c.h>
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#include <nuttx/sensors/lm75.h>
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#include "stm32.h"
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#include "stm32_i2c.h"
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#include "stm3210e-internal.h"
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#if defined(CONFIG_I2C) && defined(CONFIG_I2C_LM75) && defined(CONFIG_STM32_I2C1)
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/************************************************************************************
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* Definitions
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************************************************************************************/
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/************************************************************************************
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* Private Functions
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************************************************************************************/
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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/************************************************************************************
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* Name: stm32_lm75initialize
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*
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* Description:
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* Initialize and register the LM-75 Temperature Sensor driver.
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*
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* Input parameters:
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* devpath - The full path to the driver to register. E.g., "/dev/temp0"
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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************************************************************************************/
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int stm32_lm75initialize(FAR const char *devpath)
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{
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FAR struct i2c_dev_s *i2c;
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int ret;
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/* Configure PB.5 as Input pull-up. This pin can be used as a temperature
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* sensor interrupt (not fully implemented).
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*/
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stm32_configgpio(GPIO_LM75_OSINT);
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/* Get an instance of the I2C1 interface */
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i2c = up_i2cinitialize(1);
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if (!i2c)
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{
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return -ENODEV;
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}
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/* Then register the temperature sensor */
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ret = lm75_register(devpath, i2c, 0x48);
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if (ret < 0)
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{
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(void)up_i2cuninitialize(i2c);
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}
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return ret;
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}
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/************************************************************************************
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* Name: stm32_lm75attach
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*
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* Description:
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* Attach the LM-75 interrupt handler
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*
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* Input parameters:
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* irqhandler - the LM-75 interrupt handler
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*
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* Returned Value:
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* The previous LM-75 interrupt handler
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*
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************************************************************************************/
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xcpt_t stm32_lm75attach(xcpt_t irqhandler)
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{
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return stm32_gpiosetevent(GPIO_LM75_OSINT, true, true, true, irqhandler);
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}
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#endif /* CONFIG_I2C && CONFIG_I2C_LM75 && CONFIG_STM32_I2C1 */
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