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Add driver for LM-75 temperature sensor 

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@3947 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo 2011-09-10 16:20:09 +00:00
parent 7e9dbdb8d6
commit 264a1b97d4
18 changed files with 1125 additions and 321 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
nuttx/ChangeLog
View File

@ -2022,7 +2022,9 @@
* graphics/, include/nuttx/nx: Add new NX interfaces for drawing
circles -- both circular outlines and filled circles.
* graphic/nxglib/nxglib_spitline.c: Add a "fudge factor" that eliminates
some problems for rendering nearly horizontal, wide lines.
some problems for rendering nearly horizontal, wide lines. Hmm...
but I suspect this fudge factor also leads to new problems rendering
very thin, nearly horizontal lines. More tuning is needed.
* drivers/analog, include/nuttx/analog, arch/arch/src/lpcxx: (1) Add
updates to the ADS1255 driver, (2) fix errors from my last merge (sorry),
(3) Add DAC infrastructure, (4) add AD5410 DAC driver, and (5) add
@ -2031,7 +2033,7 @@
'make export' logic. The script now also finds and bundles up all of
the architecture-specific header files as well.
* drivers/arch/arm/src/stm32/stm32_i2c.c: Add a reset to the I2C
initialization logic to prevent spurious interrups when the I2C
initialization logic to prevent spurious interrupts when the I2C
interrupts are enabled (submitted by Uros Platise).
* Scripts/makefiles/documents. Several adjustments, corrections and
typo fixes so that NuttX will build correctly on FreeBSD using the
@ -2064,3 +2066,7 @@
(1) Clocking needs to be based on PCLK1, not HCLK and fast speed settings
need some additional bits; and (2) Correct a hang that will occur on
I2C1 if FSMC is also enabled.
* drivers/sensors/lm75.c and include/nuttx/sensors/lm75.h: Add an LM-75
temperature sensor driver.
* configs/stm3210e-eval/src/up_lm75.c: Add support for the LM-75 on the
STMicro STM3210E-EVAL board.

14
nuttx/TODO
View File

@ -1,12 +1,15 @@
NuttX TODO List (Last updated August 24, 2011)
NuttX TODO List (Last updated September 9, 2011)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This file summarizes known NuttX bugs, limitations, inconsistencies with
standards, things that could be improved, and ideas for enhancements.
nuttx/
(5) Task/Scheduler (sched/)
(1) On-demand paging (sched/)
(1) Memory Managment (mm/)
(1) Signals (sched/, arch/)
(2) Signals (sched/, arch/)
(1) pthreads (sched/)
(1) C++ Support
(5) Binary loaders (binfmt/)
@ -132,6 +135,13 @@ o Signals (sched/, arch/)
Priority: Low, required by standards but not so critical for an
embedded system.
Description: sig_notify() logic does not support SIGEV_THREAD; structure
struct sigevent does not provide required members sigev_notify_function
or sigev_notify_attributes.
Status: Low, there are alternative designs. However, these features
are required by the POSIX standard.
Priority: Low for now
o pthreads (sched/)
^^^^^^^^^^^^^^^^^

81
nuttx/arch/arm/src/stm32/stm32_i2c.c
View File

@ -934,41 +934,55 @@ int stm32_i2c_process(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs, int
/* Check for error status conditions */
if (status & I2C_SR1_BERR)
if ((status & I2C_SR1_ERRORMASK) != 0)
{
/* Bus Error */
if (status & I2C_SR1_BERR)
{
/* Bus Error */
status_errno = EIO;
}
else if (status & I2C_SR1_ARLO)
{
/* Arbitration Lost (master mode) */
status_errno = EIO;
}
else if (status & I2C_SR1_ARLO)
{
/* Arbitration Lost (master mode) */
status_errno = EAGAIN;
}
else if (status & I2C_SR1_AF)
{
/* Acknowledge Failure */
status_errno = EAGAIN;
}
else if (status & I2C_SR1_AF)
{
/* Acknowledge Failure */
status_errno = ENXIO;
}
else if (status & I2C_SR1_OVR)
{
/* Overrun/Underrun */
status_errno = ENXIO;
}
else if (status & I2C_SR1_OVR)
{
/* Overrun/Underrun */
status_errno = EIO;
}
else if (status & I2C_SR1_PECERR)
{
/* PEC Error in reception */
status_errno = EIO;
}
else if (status & I2C_SR1_PECERR)
{
/* PEC Error in reception */
status_errno = EPROTO;
}
else if (status & I2C_SR1_TIMEOUT)
{
/* Timeout or Tlow Error */
status_errno = EPROTO;
}
else if (status & I2C_SR1_TIMEOUT)
{
/* Timeout or Tlow Error */
status_errno = ETIME;
status_errno = ETIME;
}
/* This is not an error and should never happen since SMBus is not enabled */
else if (status & I2C_SR1_SMBALERT)
{
/* SMBus alert is an optional signal with an interrupt line for devices
* that want to trade their ability to master for a pin.
*/
status_errno = EINTR;
}
}
/* This is not an error, but should not happen. The BUSY signal can hang,
@ -982,17 +996,6 @@ int stm32_i2c_process(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs, int
status_errno = EBUSY;
}
/* This is not an error and should never happen since SMBus is not enabled */
else if (status & I2C_SR1_SMBALERT)
{
/* SMBus alert is an optional signal with an interrupt line for devices
* that want to trade their ability to master for a pin.
*/
status_errno = EINTR;
}
/* Re-enable the FSMC */
stm32_i2c_enablefsmc(ahbenr);

36
nuttx/configs/stm3210e-eval/include/board.h
View File

@ -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)
}

4
nuttx/configs/stm3210e-eval/src/Makefile Executable file → Normal file
View File

@ -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)

0
nuttx/configs/stm3210e-eval/src/README.txt Executable file → Normal file
View File

559
nuttx/configs/stm3210e-eval/src/stm3210e-internal.h Executable file → Normal file
View File

@ -1,277 +1,282 @@
/************************************************************************************
* configs/stm3210e_eval/src/stm3210e_internal.h
* arch/arm/src/board/stm3210e_internal.n
*
* Copyright (C) 2009 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.
*
************************************************************************************/
#ifndef __CONFIGS_STM3210E_EVAL_SRC_STM3210E_INTERNAL_H
#define __CONFIGS_STM3210E_EVAL_SRC_STM3210E_INTERNAL_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <stdint.h>
/************************************************************************************
* Definitions
************************************************************************************/
/* How many SPI modules does this chip support? The LM3S6918 supports 2 SPI
* modules (others may support more -- in such case, the following must be
* expanded).
*/
#if STM32_NSPI < 1
# undef CONFIG_STM32_SPI1
# undef CONFIG_STM32_SPI2
#elif STM32_NSPI < 2
# undef CONFIG_STM32_SPI2
#endif
/* STM3210E-EVAL GPIOs **************************************************************/
/* LEDs */
#define GPIO_LED1 (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
GPIO_OUTPUT_CLEAR|GPIO_PORTF|GPIO_PIN6)
#define GPIO_LED2 (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
GPIO_OUTPUT_CLEAR|GPIO_PORTF|GPIO_PIN7)
#define GPIO_LED3 (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
GPIO_OUTPUT_CLEAR|GPIO_PORTF|GPIO_PIN8)
#define GPIO_LED4 (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
GPIO_OUTPUT_CLEAR|GPIO_PORTF|GPIO_PIN9)
/* BUTTONS -- NOTE that some have EXTI interrupts configured */
#define MIN_IRQBUTTON BUTTON_KEY
#define MAX_IRQBUTTON JOYSTICK_UP
#define NUM_IRQBUTTONS (JOYSTICK_UP - BUTTON_KEY + 1)
#define GPIO_BTN_WAKEUP (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_PORTA|GPIO_PIN0)
#define GPIO_BTN_TAMPER (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_PORTC|GPIO_PIN13)
#define GPIO_BTN_KEY (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_EXTI|GPIO_PORTG|GPIO_PIN8)
#define GPIO_JOY_SEL (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_EXTI|GPIO_PORTG|GPIO_PIN7)
#define GPIO_JOY_DOWN (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_EXTI|GPIO_PORTD|GPIO_PIN3)
#define GPIO_JOY_LEFT (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_EXTI|GPIO_PORTG|GPIO_PIN14)
#define GPIO_JOY_RIGHT (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_EXTI|GPIO_PORTG|GPIO_PIN13)
#define GPIO_JOY_UP (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_EXTI|GPIO_PORTG|GPIO_PIN15)
/* SPI FLASH chip select: PA.4 */
#define GPIO_FLASH_CS (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN2)
/* USB Soft Connect Pullup: PB.14 */
#define GPIO_USB_PULLUP (GPIO_OUTPUT|GPIO_CNF_OUTOD|GPIO_MODE_50MHz|\
GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN14)
/************************************************************************************
* Public Types
************************************************************************************/
/* GPIO settings that will be altered when external memory is selected */
struct extmem_save_s
{
uint32_t gpiod_crl;
uint32_t gpiod_crh;
uint32_t gpioe_crl;
uint32_t gpioe_crh;
uint32_t gpiof_crl;
uint32_t gpiof_crh;
uint32_t gpiog_crl;
uint32_t gpiog_crh;
};
/************************************************************************************
* Public data
************************************************************************************/
#ifndef __ASSEMBLY__
/* GPIO configurations common to SRAM and NOR Flash */
#define NCOMMON_CONFIG 37
extern const uint16_t g_commonconfig[NCOMMON_CONFIG];
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: stm32_spiinitialize
*
* Description:
* Called to configure SPI chip select GPIO pins for the STM3210E-EVAL board.
*
************************************************************************************/
extern void weak_function stm32_spiinitialize(void);
/************************************************************************************
* Name: stm32_usbinitialize
*
* Description:
* Called to setup USB-related GPIO pins for the STM3210E-EVAL board.
*
************************************************************************************/
extern void weak_function stm32_usbinitialize(void);
/************************************************************************************
* Name: stm32_extcontextsave
*
* Description:
* Save current GPIOs that will used by external memory configurations
*
************************************************************************************/
#ifdef CONFIG_STM32_FSMC
extern void stm32_extcontextsave(struct extmem_save_s *save);
/************************************************************************************
* Name: stm32_extcontextrestore
*
* Description:
* Restore GPIOs that were used by external memory configurations
*
************************************************************************************/
extern void stm32_extcontextrestore(struct extmem_save_s *restore);
/************************************************************************************
* Name: stm32_extmemgpios
*
* Description:
* Initialize GPIOs for NOR or SRAM
*
************************************************************************************/
extern void stm32_extmemgpios(const uint16_t *gpios, int ngpios);
/************************************************************************************
* Name: stm32_enablefsmc
*
* Description:
* enable clocking to the FSMC module
*
************************************************************************************/
extern void stm32_enablefsmc(void);
/************************************************************************************
* Name: stm32_disablefsmc
*
* Description:
* enable clocking to the FSMC module
*
************************************************************************************/
extern void stm32_disablefsmc(void);
/************************************************************************************
* Name: stm32_selectnor
*
* Description:
* Initialize to access NOR flash
*
************************************************************************************/
extern void stm32_selectnor(void);
/************************************************************************************
* Name: stm32_deselectnor
*
* Description:
* Disable NOR FLASH
*
************************************************************************************/
extern void stm32_deselectnor(void);
/************************************************************************************
* Name: stm32_selectsram
*
* Description:
* Initialize to access external SRAM
*
************************************************************************************/
extern void stm32_selectsram(void);
/************************************************************************************
* Name: stm32_deselectsram
*
* Description:
* Disable external SRAM
*
************************************************************************************/
extern void stm32_deselectsram(void);
/************************************************************************************
* Name: stm32_selectlcd
*
* Description:
* Initialize to the LCD
*
************************************************************************************/
extern void stm32_selectlcd(void);
/************************************************************************************
* Name: stm32_deselectlcd
*
* Description:
* Disable the LCD
*
************************************************************************************/
extern void stm32_deselectlcd(void);
#endif /* CONFIG_STM32_FSMC */
#endif /* __ASSEMBLY__ */
#endif /* __CONFIGS_STM3210E_EVAL_SRC_STM3210E_INTERNAL_H */
/************************************************************************************
* configs/stm3210e_eval/src/stm3210e_internal.h
* arch/arm/src/board/stm3210e_internal.n
*
* Copyright (C) 2009 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.
*
************************************************************************************/
#ifndef __CONFIGS_STM3210E_EVAL_SRC_STM3210E_INTERNAL_H
#define __CONFIGS_STM3210E_EVAL_SRC_STM3210E_INTERNAL_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <stdint.h>
/************************************************************************************
* Definitions
************************************************************************************/
/* How many SPI modules does this chip support? The LM3S6918 supports 2 SPI
* modules (others may support more -- in such case, the following must be
* expanded).
*/
#if STM32_NSPI < 1
# undef CONFIG_STM32_SPI1
# undef CONFIG_STM32_SPI2
#elif STM32_NSPI < 2
# undef CONFIG_STM32_SPI2
#endif
/* STM3210E-EVAL GPIOs **************************************************************/
/* LEDs */
#define GPIO_LED1 (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
GPIO_OUTPUT_CLEAR|GPIO_PORTF|GPIO_PIN6)
#define GPIO_LED2 (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
GPIO_OUTPUT_CLEAR|GPIO_PORTF|GPIO_PIN7)
#define GPIO_LED3 (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
GPIO_OUTPUT_CLEAR|GPIO_PORTF|GPIO_PIN8)
#define GPIO_LED4 (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
GPIO_OUTPUT_CLEAR|GPIO_PORTF|GPIO_PIN9)
/* BUTTONS -- NOTE that some have EXTI interrupts configured */
#define MIN_IRQBUTTON BUTTON_KEY
#define MAX_IRQBUTTON JOYSTICK_UP
#define NUM_IRQBUTTONS (JOYSTICK_UP - BUTTON_KEY + 1)
#define GPIO_BTN_WAKEUP (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_PORTA|GPIO_PIN0)
#define GPIO_BTN_TAMPER (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_PORTC|GPIO_PIN13)
#define GPIO_BTN_KEY (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_EXTI|GPIO_PORTG|GPIO_PIN8)
#define GPIO_JOY_SEL (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_EXTI|GPIO_PORTG|GPIO_PIN7)
#define GPIO_JOY_DOWN (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_EXTI|GPIO_PORTD|GPIO_PIN3)
#define GPIO_JOY_LEFT (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_EXTI|GPIO_PORTG|GPIO_PIN14)
#define GPIO_JOY_RIGHT (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_EXTI|GPIO_PORTG|GPIO_PIN13)
#define GPIO_JOY_UP (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_MODE_INPUT|\
GPIO_EXTI|GPIO_PORTG|GPIO_PIN15)
/* SPI FLASH chip select: PA.4 */
#define GPIO_FLASH_CS (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN2)
/* USB Soft Connect Pullup: PB.14 */
#define GPIO_USB_PULLUP (GPIO_OUTPUT|GPIO_CNF_OUTOD|GPIO_MODE_50MHz|\
GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN14)
/* LM-75 Temperature Sensor: PB.5 */
#define GPIO_LM75_OSINT (GPIO_INPUT|GPIO_CNF_INPULLUP|GPIO_MODE_10MHz|\
GPIO_EXTI|GPIO_PORTB|GPIO_PIN5)
/************************************************************************************
* Public Types
************************************************************************************/
/* GPIO settings that will be altered when external memory is selected */
struct extmem_save_s
{
uint32_t gpiod_crl;
uint32_t gpiod_crh;
uint32_t gpioe_crl;
uint32_t gpioe_crh;
uint32_t gpiof_crl;
uint32_t gpiof_crh;
uint32_t gpiog_crl;
uint32_t gpiog_crh;
};
/************************************************************************************
* Public data
************************************************************************************/
#ifndef __ASSEMBLY__
/* GPIO configurations common to SRAM and NOR Flash */
#define NCOMMON_CONFIG 37
extern const uint16_t g_commonconfig[NCOMMON_CONFIG];
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: stm32_spiinitialize
*
* Description:
* Called to configure SPI chip select GPIO pins for the STM3210E-EVAL board.
*
************************************************************************************/
extern void weak_function stm32_spiinitialize(void);
/************************************************************************************
* Name: stm32_usbinitialize
*
* Description:
* Called to setup USB-related GPIO pins for the STM3210E-EVAL board.
*
************************************************************************************/
extern void weak_function stm32_usbinitialize(void);
/************************************************************************************
* Name: stm32_extcontextsave
*
* Description:
* Save current GPIOs that will used by external memory configurations
*
************************************************************************************/
#ifdef CONFIG_STM32_FSMC
extern void stm32_extcontextsave(struct extmem_save_s *save);
/************************************************************************************
* Name: stm32_extcontextrestore
*
* Description:
* Restore GPIOs that were used by external memory configurations
*
************************************************************************************/
extern void stm32_extcontextrestore(struct extmem_save_s *restore);
/************************************************************************************
* Name: stm32_extmemgpios
*
* Description:
* Initialize GPIOs for NOR or SRAM
*
************************************************************************************/
extern void stm32_extmemgpios(const uint16_t *gpios, int ngpios);
/************************************************************************************
* Name: stm32_enablefsmc
*
* Description:
* enable clocking to the FSMC module
*
************************************************************************************/
extern void stm32_enablefsmc(void);
/************************************************************************************
* Name: stm32_disablefsmc
*
* Description:
* enable clocking to the FSMC module
*
************************************************************************************/
extern void stm32_disablefsmc(void);
/************************************************************************************
* Name: stm32_selectnor
*
* Description:
* Initialize to access NOR flash
*
************************************************************************************/
extern void stm32_selectnor(void);
/************************************************************************************
* Name: stm32_deselectnor
*
* Description:
* Disable NOR FLASH
*
************************************************************************************/
extern void stm32_deselectnor(void);
/************************************************************************************
* Name: stm32_selectsram
*
* Description:
* Initialize to access external SRAM
*
************************************************************************************/
extern void stm32_selectsram(void);
/************************************************************************************
* Name: stm32_deselectsram
*
* Description:
* Disable external SRAM
*
************************************************************************************/
extern void stm32_deselectsram(void);
/************************************************************************************
* Name: stm32_selectlcd
*
* Description:
* Initialize to the LCD
*
************************************************************************************/
extern void stm32_selectlcd(void);
/************************************************************************************
* Name: stm32_deselectlcd
*
* Description:
* Disable the LCD
*
************************************************************************************/
extern void stm32_deselectlcd(void);
#endif /* CONFIG_STM32_FSMC */
#endif /* __ASSEMBLY__ */
#endif /* __CONFIGS_STM3210E_EVAL_SRC_STM3210E_INTERNAL_H */

0
nuttx/configs/stm3210e-eval/src/up_boot.c Executable file → Normal file
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0
nuttx/configs/stm3210e-eval/src/up_lcd.c Executable file → Normal file
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0
nuttx/configs/stm3210e-eval/src/up_leds.c Executable file → Normal file
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128
nuttx/configs/stm3210e-eval/src/up_lm75.c Normal file
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@ -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 */

0
nuttx/configs/stm3210e-eval/src/up_nsh.c Executable file → Normal file
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0
nuttx/configs/stm3210e-eval/src/up_spi.c Executable file → Normal file
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0
nuttx/configs/stm3210e-eval/src/up_usbstrg.c Executable file → Normal file
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4
nuttx/drivers/sensors/Make.defs
View File

@ -38,6 +38,10 @@
ifeq ($(CONFIG_I2C),y)
CSRCS += lis331dl.c
ifeq ($(CONFIG_I2C_LM75),y)
CSRCS += lm75.c
endif
endif
# Include sensor driver build support

473
nuttx/drivers/sensors/lm75.c Normal file
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@ -0,0 +1,473 @@
/****************************************************************************
* drivers/sensors/lm75.c
* Character driver for the STMicro LM-75 Temperature Sensor
*
* 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 <stdlib.h>
#include <fixedmath.h>
#include <errno.h>
#include <nuttx/fs.h>
#include <nuttx/i2c.h>
#include <nuttx/sensors/lm75.h>
#if defined(CONFIG_I2C) && defined(CONFIG_I2C_LM75)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Centigrade to Fahrenheit conversion: F = 9*C/5 + 32 */
#define B16_9DIV5 (9 * 65536 / 5)
#define B16_32 (32 * 65536);
/****************************************************************************
* Private
****************************************************************************/
struct lm75_dev_s
{
FAR struct i2c_dev_s *i2c; /* I2C interface */
uint8_t addr; /* I2C address */
bool fahrenheit; /* true: temperature will be reported in fahrenheit */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* I2C Helpers */
static int lm75_readb8(FAR struct lm75_dev_s *priv, uint8_t regaddr,
FAR b8_t *regvalue);
#if 0 // Not used
static int lm75_writeb8(FAR struct lm75_dev_s *priv, uint8_t regaddr,
b8_t regval);
#endif
static int lm75_readtemp(FAR struct lm75_dev_s *priv, b16_t *temp);
static int lm75_readconf(FAR struct lm75_dev_s *priv, uint8_t *conf);
static int lm75_writeconf(FAR struct lm75_dev_s *priv, uint8_t conf);
/* Character driver methods */
static int lm75_open(FAR struct file *filep);
static int lm75_close(FAR struct file *filep);
static ssize_t lm75_read(FAR struct file *, FAR char *, size_t);
static ssize_t lm75_write(FAR struct file *filep, FAR const char *buffer, size_t buflen);
static int lm75_ioctl(FAR struct file *filep,int cmd,unsigned long arg);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct file_operations lm75_fops =
{
lm75_open,
lm75_close,
lm75_read,
lm75_write,
0,
lm75_ioctl
#ifndef CONFIG_DISABLE_POLL
, 0
#endif
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: lm75_readb8
*
* Description:
* Read a 16-bit register (LM75_TEMP_REG, LM75_THYS_REG, or LM75_TOS_REG)
*
****************************************************************************/
static int lm75_readb8(FAR struct lm75_dev_s *priv, uint8_t regaddr,
FAR b8_t *regvalue)
{
uint8_t buffer[2];
int ret;
/* Write the register address */
I2C_SETADDRESS(priv->i2c, priv->addr, 7);
ret = I2C_WRITE(priv->i2c, &regaddr, 1);
if (ret < 0)
{
return ret;
}
/* Restart and read 16-bits from the register (discarding 7) */
ret = I2C_READ(priv->i2c, buffer, 2);
if (ret < 0)
{
return ret;
}
/* Data format is: TTTTTTTT Txxxxxxx where TTTTTTTTT is a nine-bit
* temperature value with LSB = 0.5 degrees centigrade. So the raw
* data is b8_t
*/
*regvalue = (b8_t)buffer[0] << 8 | (b8_t)buffer[1];
return OK;
}
/****************************************************************************
* Name: lm75_writeb8
*
* Description:
* Write to a 16-bit register (LM75_TEMP_REG, LM75_THYS_REG, or LM75_TOS_REG)
*
****************************************************************************/
#if 0 // Not used
static int lm75_writeb8(FAR struct lm75_dev_s *priv, uint8_t regaddr,
b8_t regval)
{
uint8_t buffer[3];
/* Set up a 3 byte message to send */
buffer[0] = regaddr;
buffer[1] = regval >> 8;
buffer[2] = regval;
/* Write the register address followed by the data (no RESTART) */
I2C_SETADDRESS(priv->i2c, priv->addr, 7);
return I2C_WRITE(priv->i2c, buffer, 3);
}
#endif
/****************************************************************************
* Name: lm75_readtemp
*
* Description:
* Read the temperature register with special scaling (LM75_TEMP_REG)
*
****************************************************************************/
static int lm75_readtemp(FAR struct lm75_dev_s *priv, b16_t *temp)
{
b8_t temp8;
b16_t temp16;
int ret;
/* Read the raw temperature data. Data format is: TTTTTTTT Txxxxxxx where
* TTTTTTTTT is a nine-bit temperature value with LSB = 0.5 degrees centigrade.
* So the raw data is b8_t.
*/
ret = lm75_readb8(priv, LM75_TEMP_REG, &temp8);
if (ret < 0)
{
return ret;
}
/* Convert to b16_t */
temp16 = b8tob16(temp8);
/* Was fahrenheit requested? */
if (priv->fahrenheit)
{
/* Centigrade to Fahrenheit conversion: F = 9*C/5 + 32 */
temp16 = b16mulb16(temp16, B16_9DIV5) + B16_32;
}
*temp = temp16;
return OK;
}
/****************************************************************************
* Name: lm75_readconf
*
* Description:
* Read the 8-bit LM75 configuration register
*
****************************************************************************/
static int lm75_readconf(FAR struct lm75_dev_s *priv, uint8_t *conf)
{
uint8_t buffer;
int ret;
/* Write the configuration register address */
I2C_SETADDRESS(priv->i2c, priv->addr, 7);
buffer = LM75_CONF_REG;
ret = I2C_WRITE(priv->i2c, &buffer, 1);
if (ret < 0)
{
return ret;
}
/* Restart and read 8-bits from the register */
ret = I2C_READ(priv->i2c, conf, 1);
return ret;
}
/****************************************************************************
* Name: lm75_writeconf
*
* Description:
* Write to a 8-bit LM75 configuration register.
*
****************************************************************************/
static int lm75_writeconf(FAR struct lm75_dev_s *priv, uint8_t conf)
{
uint8_t buffer[2];
/* Set up a 2 byte message to send */
buffer[0] = LM75_CONF_REG;
buffer[1] = conf;
/* Write the register address followed by the data (no RESTART) */
I2C_SETADDRESS(priv->i2c, priv->addr, 7);
return I2C_WRITE(priv->i2c, buffer, 2);
}
/****************************************************************************
* Name: lm75_open
*
* Description:
* This function is called whenever the LM-75 device is opened.
*
****************************************************************************/
static int lm75_open(FAR struct file *filep)
{
return OK;
}
/****************************************************************************
* Name: lm75_close
*
* Description:
* This routine is called when the LM-75 device is closed.
*
****************************************************************************/
static int lm75_close(FAR struct file *filep)
{
return OK;
}
/****************************************************************************
* Name: lm75_read
****************************************************************************/
static ssize_t lm75_read(FAR struct file *filep, FAR char *buffer, size_t buflen)
{
FAR struct inode *inode = filep->f_inode;
FAR struct lm75_dev_s *priv = inode->i_private;
FAR b16_t *ptr;
ssize_t nsamples;
int ret;
/* How many samples were requested to get? */
nsamples = buflen/sizeof(b16_t);
ptr = (FAR b16_t *)buffer;
/* Get the requested number of samples */
for (; nsamples > 0; nsamples--)
{
b16_t temp;
/* Read the next b16_t temperature value */
ret = lm75_readtemp(priv, &temp);
if (ret < 0)
{
return (ssize_t)ret;
}
/* Save the temperature value in the user buffer */
*ptr++ = temp;
}
return nsamples * sizeof(b16_t);
}
/****************************************************************************
* Name: lm75_write
****************************************************************************/
static ssize_t lm75_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen)
{
return -ENOSYS;
}
/****************************************************************************
* Name: lm75_ioctl
****************************************************************************/
static int lm75_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
{
FAR struct inode *inode = filep->f_inode;
FAR struct lm75_dev_s *priv = inode->i_private;
int ret = OK;
switch (arg)
{
/* Read from the configuration register. Arg: uint8_t* pointer */
case SNIOC_READCONF:
{
FAR uint8_t *ptr = (FAR uint8_t *)((uintptr_t)arg);
ret = lm75_readconf(priv, ptr);
}
break;
/* Wrtie to the configuration register. Arg: uint8_t value */
case SNIOC_WRITECONF:
ret = lm75_writeconf(priv, (uint8_t)arg);
break;
/* Shutdown the LM75, Arg: None */
case SNIOC_SHUTDOWN:
{
uint8_t conf;
ret = lm75_readconf(priv, &conf);
if (ret == OK)
{
ret = lm75_writeconf(priv, conf | LM75_CONF_SHUTDOWN);
}
}
break;
/* Powerup the LM75, Arg: None */
case SNIOC_POWERUP:
{
uint8_t conf;
ret = lm75_readconf(priv, &conf);
if (ret == OK)
{
ret = lm75_writeconf(priv, conf & ~LM75_CONF_SHUTDOWN);
}
}
break;
/* Report samples in Fahrenheit */
case SNIOC_FAHRENHEIT:
priv->fahrenheit = true;
break;
/* Report Samples in Centigrade */
case SNIOC_CENTIGRADE:
priv->fahrenheit = false;
break;
default:
ret = -ENOTTY;
break;
}
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: lm75_register
*
* Description:
* Register the LM-75 character device as 'devpath'
*
* Input Parameters:
* devpath - The full path to the driver to register. E.g., "/dev/temp0"
* i2c - An instance of the I2C interface to use to communicate with LM75
* addr - The I2C address of the LM-75. The base I2C address of the LM75
* is 0x48. Bits 0-3 can be controlled to get 8 unique addresses from 0x48
* through 0x4f.
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int lm75_register(FAR const char *devpath, FAR struct i2c_dev_s *i2c, uint8_t addr)
{
FAR struct lm75_dev_s *priv;
int ret;
/* Initialize the LM-75 device structure */
priv = (FAR struct lm75_dev_s *)malloc(sizeof(struct lm75_dev_s));
if (!priv)
{
return -ENOMEM;
}
priv->i2c = i2c;
priv->addr = addr;
priv->fahrenheit = false;
/* Register the character driver */
ret = register_driver(devpath, &lm75_fops, 0555, priv);
if (ret < 0)
{
free(priv);
}
return ret;
}
#endif /* CONFIG_I2C && CONFIG_I2C_LM75 */

8
nuttx/include/nuttx/ioctl.h
View File

@ -60,6 +60,7 @@
#define _SIOCBASE (0x8b00) /* Socket ioctl commands */
#define _ARPBASE (0x8c00) /* ARP ioctl commands */
#define _TSBASE (0x8d00) /* Touchscreen ioctl commands */
#define _SNBASE (0x8e00) /* Sensor ioctl commands */
/* Macros used to manage ioctl commands */
@ -161,11 +162,16 @@
#define _ARPIOCVALID(c) (_IOC_TYPE(c)==_ARPBASE)
#define _ARPIOC(nr) _IOC(_ARPBASE,nr)
/* NuttX ARP touchscrren ioctl definitions (see nuttx/input/touchscreen.h) **/
/* NuttX ARP touchscreen ioctl definitions (see nuttx/input/touchscreen.h) **/
#define _TSIOCVALID(c) (_IOC_TYPE(c)==_TSBASE)
#define _TSIOC(nr) _IOC(_TSBASE,nr)
/* NuttX ARP sensor ioctl definitions (see nuttx/sensor/*.h) ****************/
#define _SNIOCVALID(c) (_IOC_TYPE(c)==_SNBASE)
#define _SNIOC(nr) _IOC(_SNBASE,nr)
/****************************************************************************
* Public Type Definitions
****************************************************************************/

129
nuttx/include/nuttx/sensors/lm75.h Normal file
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@ -0,0 +1,129 @@
/****************************************************************************
* include/nuttx/lm75.h
*
* 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.
*
****************************************************************************/
#ifndef __NUTTX_SENSORSD_LM75_H
#define __NUTTX_SENSORSD_LM75_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/ioctl.h>
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Configuration ************************************************************
* CONFIG_I2C - Enables support for I2C drivers
* CONFIG_I2C_LM75 - Enables support for the LM-75 driver
*/
#define CONFIG_LM75_BASEADDR 0x48
/* IOCTL Commands ***********************************************************/
#define SNIOC_READCONF _SNIOC(0x0001) /* Arg: uint8_t* pointer */
#define SNIOC_WRITECONF _SNIOC(0x0002) /* Arg: uint8_t value */
#define SNIOC_SHUTDOWN _SNIOC(0x0003) /* Arg: None */
#define SNIOC_POWERUP _SNIOC(0x0004) /* Arg: None */
#define SNIOC_FAHRENHEIT _SNIOC(0x0005) /* Arg: None */
#define SNIOC_CENTIGRADE _SNIOC(0x0006) /* Arg: None */
/* LM-75 Register Definitions ***********************************************/
/* LM-75 Registers addresses */
#define LM75_TEMP_REG 0x00 /* Temperature Register */
#define LM75_CONF_REG 0x01 /* Configuration Register */
#define LM75_THYS_REG 0x02 /* Temperature Register */
#define LM75_TOS_REG 0x03 /* Over-temp Shutdown threshold Register */
/* Configuration Register Bit Definitions */
#define LM75_CONF_SHUTDOWN (1 << 0) /* Bit 0: Put LM75 goes in low power shutdown mode */
#define LM75_CONF_INTMODE (1 << 1) /* Bit 1: 0=Comparator 1=Interrupt mode */
#define LM75_CONF_POLARITY (1 << 2) /* Bit 2: 0=O.S. Active low 1=active high */
#define LM75_CONF_FAULTQ (3) /* Bits 3-4: # faults before setting O.S. */
/* NOTE: When temperature values are read, they are return as b16_t, fixed
* precision integer values (see include/fixedmath.h).
*/
/****************************************************************************
* Global Data
****************************************************************************/
/****************************************************************************
* Global Function Prototypes
****************************************************************************/
/****************************************************************************
* Global Function Prototypes
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/****************************************************************************
* Name: lm75_register
*
* Description:
* Register the LM-75 character device as 'devpath'
*
* Input Parameters:
* devpath - The full path to the driver to register. E.g., "/dev/temp0"
* i2c - An instance of the I2C interface to use to communicate with LM75
* addr - The I2C address of the LM-75. The base I2C address of the LM75
* is 0x48. Bits 0-3 can be controlled to get 8 unique addresses from 0x48
* through 0x4f.
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
EXTERN int lm75_register(FAR const char *devpath, FAR struct i2c_dev_s *i2c,
uint8_t addr);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __NUTTX_SENSORSD_LM75_H */