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drivers/sensors/tmp112: Add support for TMP112 temperature sensor

Browse source 
Add support for the Texas Instruments TMP112 I2C/SMBus digital
temperature sensor. Also add a new defconfig that includes
support for a TMP112 sensor and extend the existing documentation
to include its description.

Signed-off-by: Niccolò Maggioni <nicco.maggioni+nuttx@gmail.com>
This commit is contained in:
Niccolò Maggioni 2025-08-11 14:19:07 +02:00 • committed by Alan C. Assis
parent 2b3741d083
commit 3ba6047e29
11 changed files with 764 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

66
Documentation/platforms/arm/rp2040/boards/raspberrypi-pico/index.rst
View file

@ -48,34 +48,34 @@ Pad Signal Notes
===== ========== ==========
1 GPIO0 Default TX for UART0 serial console
2 GPIO1 Default RX for UART0 serial console
3 Ground
4 GPIO2
5 GPIO3
3 Ground
4 GPIO2
5 GPIO3
6 GPIO4 Default SDA for I2C0
7 GPIO5 Default SCL for I2C0
8 Ground
8 Ground
9 GPIO6 Default SDA for I2C1
10 GPIO7 Default SCL for I2C1
11 GPIO8 Default RX for SPI1
12 GPIO9 Default CSn for SPI1
13 Ground
13 Ground
14 GPIO10 Default SCK for SPI1
15 GPIO11 Default TX for SPI1
16 GPIO12
17 GPIO13
18 Ground
19 GPIO14
20 GPIO15
16 GPIO12
17 GPIO13
18 Ground
19 GPIO14
20 GPIO15
21 GPIO16 Default RX for SPI0
22 GPIO17 Default CSn for SPI0
23 Ground
23 Ground
24 GPIO18 Default SCK for SPI0
25 GPIO19 Default TX for SPI0
26 GPIO20 Default TX for UART1 serial console
27 GPIO21 Default RX for UART1 serial console
28 Ground
29 GPIO22
30 Run
28 Ground
29 GPIO22
30 Run
31 GPIO26 ADC0
32 GPIO27 ADC1
33 AGND Analog Ground
@ -83,7 +83,7 @@ Pad Signal Notes
35 ADC_VREF Analog reference voltage
36 3V3 Power output to peripherals
37 3V3_EN Pull to ground to turn off.
38 Ground
38 Ground
39 VSYS +5V Supply to board
40 VBUS Connected to USB +5V
===== ========== ==========
@ -217,7 +217,7 @@ LCD1602 Segment LCD Display (I2C).
:widths: auto
:header-rows: 1
* - PCF8574 BackPack
* - PCF8574 BackPack
- Raspberry Pi Pico
* - GND
- GND (Pin 3 or 38 or ...)
@ -263,7 +263,7 @@ card support enabled.
* - SD card slot
- Raspberry Pi Pico
* - DAT2
* - DAT2
- Not connected
* - DAT3/CS
- GP17 (SPI0 CSn) (Pin 22)
@ -277,7 +277,7 @@ card support enabled.
- GND (Pin 3 or 38 or ...)
* - DAT0/DO
- GP16 (SPI0 RX) (Pin 21)
* - DAT1
* - DAT1
- Not connected
Card hot swapping is not supported.
@ -300,7 +300,7 @@ for SSD1306 OLED display (I2C) test configuration.
- 3V3 OUT (Pin 36)
* - SDA
- GP4 (I2C0 SDA) (Pin 6)
* - SCL
* - SCL
- GP5 (I2C0 SCL) (Pin 7)
st7735
@ -332,6 +332,34 @@ ST7735 SPI LCD.
* - RESET
- GP10 (Pin 14)
tmp112
------
NuttShell configuration (console enabled in USB Port, at 115200 bps) with support for Texas Instruments TMP112 sensor:
.. list-table:: TMP112 connections
:widths: auto
:header-rows: 1
* - TMP112
- Raspberry Pi Pico
* - GND
- GND (Pin 3 or 38 or ...)
* - VCC
- 3V3 OUT (Pin 36)
* - SDA
- GP4 (I2C0 SDA) (Pin 6)
* - SCL
- GP5 (I2C0 SCL) (Pin 7)
* - ADD0
- GND (Pin 3 or 38 or ...)
.. code-block:: console
nsh> tmp112
Sensor #1 = 27.688 degrees Celsius
nsh>
usbmsc
------

89
boards/arm/rp2040/common/include/rp2040_tmp112.h Normal file
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@ -0,0 +1,89 @@
/****************************************************************************
* boards/arm/rp2040/common/include/rp2040_tmp112.h
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __BOARDS_ARM_RP2040_COMMON_INCLUDE_RP2040_TMP112_H
#define __BOARDS_ARM_RP2040_COMMON_INCLUDE_RP2040_TMP112_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/i2c/i2c_master.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Type Definitions
****************************************************************************/
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Inline Functions
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: board_tmp112_initialize
*
* Description:
* Initialize and register the TMP112 temperature sensor driver.
*
* Input Parameters:
* i2c - An instance of the I2C interface to use.
* devno - The device number, used to build the device path as /dev/tempN.
* addr - The I2C address to use.
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int board_tmp112_initialize(FAR struct i2c_master_s *i2c, int devno,
uint8_t addr);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __BOARDS_ARM_RP2040_COMMON_INCLUDE_RP2040_TMP112_H */

4
boards/arm/rp2040/common/src/Make.defs
View file

@ -109,6 +109,10 @@ ifeq ($(CONFIG_SENSORS_MAX6675),y)
CSRCS += rp2040_max6675.c
endif
ifeq ($(CONFIG_SENSORS_TMP112),y)
CSRCS += rp2040_tmp112.c
endif
DEPPATH += --dep-path src
VPATH += :src
CFLAGS += ${INCDIR_PREFIX}$(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)src

17
boards/arm/rp2040/common/src/rp2040_common_bringup.c
View file

@ -90,6 +90,12 @@
#include "rp2040_max6675.h"
#endif
#ifdef CONFIG_SENSORS_TMP112
#include <nuttx/sensors/tmp112.h>
#include "rp2040_tmp112.h"
#include "rp2040_i2c.h"
#endif
#ifdef CONFIG_RP2040_PWM
#include "rp2040_pwm.h"
#include "rp2040_pwmdev.h"
@ -569,6 +575,17 @@ int rp2040_common_bringup(void)
}
#endif
#ifdef CONFIG_SENSORS_TMP112
/* Try to register TMP112 device at I2C0 with a common address */
ret = board_tmp112_initialize(rp2040_i2cbus_initialize(0), 0,
TMP112_ADDR_1);
if (ret < 0)
{
syslog(LOG_ERR, "Failed to initialize TMP112 driver: %d\n", ret);
}
#endif
#ifdef CONFIG_VIDEO_FB
ret = fb_register(0, 0);
if (ret < 0)

105
boards/arm/rp2040/common/src/rp2040_tmp112.c Normal file
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@ -0,0 +1,105 @@
/****************************************************************************
* boards/arm/rp2040/common/src/rp2040_tmp112.c
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/sensors/tmp112.h>
#include "rp2040_i2c.h"
#include "rp2040_tmp112.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_tmp112_initialize
*
* Description:
* Initialize and register the TMP112 temperature sensor driver.
*
* Input Parameters:
* i2c - An instance of the I2C interface to use.
* devno - The device number, used to build the device path as /dev/tempN.
* addr - The I2C address to use.
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int board_tmp112_initialize(FAR struct i2c_master_s *i2c, int devno,
uint8_t addr)
{
char devpath[11];
int ret;
sninfo("Initializing TMP112 with address %#4x\n", addr);
if (i2c)
{
snprintf(devpath, sizeof(devpath), "/dev/temp%d", devno);
ret = tmp112_register(devpath, i2c, addr);
if (ret < 0)
{
snerr("ERROR: Error registering TMP112 at /dev/temp%d\n", devno);
}
}
else
{
ret = -ENODEV;
}
return ret;
}

58
boards/arm/rp2040/raspberrypi-pico/configs/tmp112/defconfig Normal file
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@ -0,0 +1,58 @@
#
# This file is autogenerated: PLEASE DO NOT EDIT IT.
#
# You can use "make menuconfig" to make any modifications to the installed .config file.
# You can then do "make savedefconfig" to generate a new defconfig file that includes your
# modifications.
#
# CONFIG_DEV_CONSOLE is not set
# CONFIG_LIBC_LONG_LONG is not set
# CONFIG_NSH_ARGCAT is not set
# CONFIG_NSH_CMDOPT_HEXDUMP is not set
# CONFIG_NSH_DISABLE_DATE is not set
# CONFIG_NSH_DISABLE_LOSMART is not set
# CONFIG_RP2040_UART0 is not set
CONFIG_ARCH="arm"
CONFIG_ARCH_BOARD="raspberrypi-pico"
CONFIG_ARCH_BOARD_COMMON=y
CONFIG_ARCH_BOARD_RASPBERRYPI_PICO=y
CONFIG_ARCH_CHIP="rp2040"
CONFIG_ARCH_CHIP_RP2040=y
CONFIG_ARCH_RAMVECTORS=y
CONFIG_ARCH_STACKDUMP=y
CONFIG_BOARDCTL_RESET=y
CONFIG_BOARD_LOOPSPERMSEC=10450
CONFIG_BUILTIN=y
CONFIG_CDCACM=y
CONFIG_CDCACM_CONSOLE=y
CONFIG_DEBUG_FULLOPT=y
CONFIG_DEBUG_SYMBOLS=y
CONFIG_DISABLE_POSIX_TIMERS=y
CONFIG_EXAMPLES_HELLO=y
CONFIG_EXAMPLES_TMP112=y
CONFIG_FS_PROCFS=y
CONFIG_FS_PROCFS_REGISTER=y
CONFIG_INIT_ENTRYPOINT="nsh_main"
CONFIG_LIBC_FLOATINGPOINT=y
CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
CONFIG_NSH_ARCHINIT=y
CONFIG_NSH_BUILTIN_APPS=y
CONFIG_NSH_READLINE=y
CONFIG_NSH_USBCONSOLE=y
CONFIG_RAM_SIZE=270336
CONFIG_RAM_START=0x20000000
CONFIG_READLINE_CMD_HISTORY=y
CONFIG_RP2040_I2C0=y
CONFIG_RP2040_I2C=y
CONFIG_RR_INTERVAL=200
CONFIG_SCHED_WAITPID=y
CONFIG_SENSORS=y
CONFIG_SENSORS_TMP112=y
CONFIG_START_DAY=9
CONFIG_START_MONTH=2
CONFIG_START_YEAR=2021
CONFIG_SYSTEM_NSH=y
CONFIG_TESTING_GETPRIME=y
CONFIG_TESTING_OSTEST=y
CONFIG_USBDEV=y
CONFIG_USBDEV_BUSPOWERED=y

4
drivers/sensors/CMakeLists.txt
View file

@ -340,6 +340,10 @@ if(CONFIG_SENSORS)
list(APPEND SRCS amg88xx.c)
endif()
if(CONFIG_SENSORS_TMP112)
list(APPEND SRCS tmp112.c)
endif()
endif() # CONFIG_I2C
# These drivers depend on SPI support

15
drivers/sensors/Kconfig
View file

@ -2146,4 +2146,19 @@ config SENSORS_FS3000_THREAD_STACKSIZE
endif # SENSORS_FS3000
config SENSORS_TMP112
bool "Texas Instruments TMP112x Temperature Sensor support"
default n
select I2C
---help---
Enable driver support for the Texas Instruments TMP112x temperature sensor.
if SENSORS_TMP112
config TMP112_I2C_FREQUENCY
int "TMP112 I2C frequency"
default 400000
endif #SENSORS_TMP112
endif # SENSORS

4
drivers/sensors/Make.defs
View file

@ -332,6 +332,10 @@ ifeq ($(CONFIG_SENSORS_BMM150),y)
CSRCS += bmm150_uorb.c
endif
ifeq ($(CONFIG_SENSORS_TMP112),y)
CSRCS += tmp112.c
endif
endif # CONFIG_I2C
# These drivers depend on SPI support

304
drivers/sensors/tmp112.c Normal file
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@ -0,0 +1,304 @@
/****************************************************************************
* drivers/sensors/tmp112.c
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <string.h>
#include <time.h>
#include <nuttx/arch.h>
#include <nuttx/kmalloc.h>
#include <nuttx/signal.h>
#include <nuttx/fs/fs.h>
#include <nuttx/i2c/i2c_master.h>
#include <nuttx/random.h>
#include <nuttx/sensors/tmp112.h>
/****************************************************************************
* Private Types
****************************************************************************/
struct tmp112_dev_s
{
FAR struct i2c_master_s *i2c; /* I2C interface */
uint8_t addr; /* TMP112 I2C address */
int freq; /* TMP112 Frequency */
uint16_t tmp112_temp_raw; /* Temperature as read from TMP112 */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Character driver methods */
static ssize_t tmp112_read(FAR struct file *filep, FAR char *buffer,
size_t buflen);
static ssize_t tmp112_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct file_operations g_tmp112fops =
{
NULL, /* open */
NULL, /* close */
tmp112_read, /* read */
tmp112_write, /* write */
};
/****************************************************************************
* Private Functions
****************************************************************************/
static uint16_t tmp112_getreg16(FAR struct tmp112_dev_s *priv,
uint8_t regaddr, uint8_t ms_delay)
{
struct i2c_config_s config;
uint16_t msb;
uint16_t lsb;
uint16_t regval = 0;
int ret;
/* Set up the I2C configuration */
config.frequency = priv->freq;
config.address = priv->addr;
config.addrlen = 7;
/* Register to read */
ret = i2c_write(priv->i2c, &config, &regaddr, 1);
if (ret < 0)
{
snerr("ERROR: i2c_write failed: %s (%d)\n", strerror(-ret), ret);
return ret;
}
if (ms_delay > 0)
{
nxsig_usleep(ms_delay * 1000);
}
/* Read register */
ret = i2c_read(priv->i2c, &config, (FAR uint8_t *)&regval, 2);
if (ret < 0)
{
snerr("ERROR: i2c_read failed: %d\n", ret);
return ret;
}
/* MSB and LSB are inverted */
msb = (regval & 0xff);
lsb = (regval & 0xff00) >> 8;
regval = (msb << 4) | (lsb >> 4);
return regval;
}
static int tmp112_putreg16(FAR struct tmp112_dev_s *priv, uint8_t regaddr,
uint16_t regval)
{
struct i2c_config_s config;
uint8_t data[3];
int ret;
/* Set up the I2C configuration */
config.frequency = priv->freq;
config.address = priv->addr;
config.addrlen = 7;
data[0] = regaddr;
data[1] = (regval >> 8) & 0xff;
data[2] = regval & 0xff;
/* Write the register address and value */
ret = i2c_write(priv->i2c, &config, (FAR uint8_t *)&data, 3);
if (ret < 0)
{
snerr("ERROR: i2c_write failed: %s (%d)\n", strerror(-ret), ret);
return ret;
}
return OK;
}
static int tmp112_writeconfig(FAR struct tmp112_dev_s *priv)
{
/* Datasheet Table 7-10: Configuration and Power-Up/Reset Formats
* | BYTE | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
* |------|-----|-----|-----|-----|-----|-----|-----|-----|
* | 1 | OS | R1 | R0 | F1 | F0 | POL | TM | SD |
* | | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
* |------|-----|-----|-----|-----|-----|-----|-----|-----|
* | 2 | CR1 | CR0 | AL | EM | 0 | 0 | 0 | 0 |
* | | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
* |------|-----|-----|-----|-----|-----|-----|-----|-----|
*/
/* Byte 1: set 12 bit resolution, Comparator mode, Continuous
* Conversion mode
*/
const uint8_t b1 = 0b01100000;
/* Byte 2: set 4Hz conversion rate, non-Extended mode */
const uint8_t b2 = 0b10100000;
return tmp112_putreg16(priv, TMP112_REG_CONFIG, (b1 << 8) | b2);
}
static void tmp112_read_temp(FAR struct tmp112_dev_s *priv)
{
/* Wait 1.5x typical conversion time (10ms) to ensure that the
* temperature register is primed and then read it.
*/
uint16_t value = tmp112_getreg16(priv, TMP112_REG_TEMP, 15);
if (value >= UINT16_MAX - __ELASTERROR)
{
snerr("ERROR: Invalid temperature read\n");
priv->tmp112_temp_raw = 0;
}
else
{
priv->tmp112_temp_raw = value;
sninfo("Temperature (raw) = %" PRIu16 "\n", priv->tmp112_temp_raw);
}
}
static ssize_t tmp112_read(FAR struct file *filep, FAR char *buffer,
size_t buflen)
{
FAR struct inode *inode = filep->f_inode;
FAR struct tmp112_dev_s *priv = inode->i_private;
FAR float *temperature = (FAR float *)buffer;
if (!buffer)
{
snerr("ERROR: Buffer is null\n");
return -1;
}
if (buflen != 4)
{
snerr("ERROR: You can't read something other than 32 bits "
"(4 bytes)\n");
return -1;
}
/* Refresh the temperature */
tmp112_read_temp(priv);
/* Get the temperature */
*temperature = (float)priv->tmp112_temp_raw * 0.0625f;
/* Return size of data (float, 4 bytes) */
return sizeof(float);
}
static ssize_t tmp112_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen)
{
return -ENOSYS;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: tmp112_register
*
* Description:
* Register the TMP112 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.
* addr - The I2C address to use.
* When multiple sensors are connected to the same bus, each one
* must be electrically configured to use a different I2C
* address as specified in the datasheet.
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int tmp112_register(FAR const char *devpath, FAR struct i2c_master_s *i2c,
uint8_t addr)
{
FAR struct tmp112_dev_s *priv;
int ret;
/* Initialize the TMP112 device structure */
priv = (FAR struct tmp112_dev_s *)kmm_malloc(sizeof(struct tmp112_dev_s));
if (!priv)
{
snerr("ERROR: Failed to allocate instance\n");
return -ENOMEM;
}
priv->i2c = i2c;
priv->addr = addr;
priv->freq = CONFIG_TMP112_I2C_FREQUENCY;
/* Write the configuration registers */
sninfo("Writing configuration\n");
tmp112_writeconfig(priv);
/* Register the character driver */
ret = register_driver(devpath, &g_tmp112fops, 0666, priv);
if (ret < 0)
{
snerr("ERROR: Failed to register driver: %d\n", ret);
kmm_free(priv);
}
sninfo("Driver loaded successfully\n");
return ret;
}

117
include/nuttx/sensors/tmp112.h Normal file
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@ -0,0 +1,117 @@
/****************************************************************************
* include/nuttx/sensors/tmp112.h
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __INCLUDE_NUTTX_SENSORS_TMP112_H
#define __INCLUDE_NUTTX_SENSORS_TMP112_H
#if defined(CONFIG_I2C) && defined(CONFIG_SENSORS_TMP112)
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/i2c/i2c_master.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define TMP112_REG_CONFIG 0x01
#define TMP112_REG_TEMP 0x00
/* Addresses for the Alert-only and Address+Alert versions of this IC.
* Typically include:
* - TMP112D0 (X2SON-5 package)
* - TMP112D1 (X2SON-5 package)
* - TMP112D2 (X2SON-5 package)
* - TMP112D3 (X2SON-5 package)
* - TMP112A (SOT563-6 package)
* - TMP112B (SOT563-6 package)
* - TMP112D (SOT563-6 package)
* - TMP112N (SOT563-6 package)
*/
#define TMP112_ADDR_1 0x48
#define TMP112_ADDR_2 0x49
#define TMP112_ADDR_3 0x4A
#define TMP112_ADDR_4 0x4B
/* Addresses for the Address-only version of this IC.
* Typically includes:
* - TMP112D (X2SON-5 package)
*/
#define TMP112_ALT_ADDR_1 0x40
#define TMP112_ALT_ADDR_2 0x41
#define TMP112_ALT_ADDR_3 0x42
#define TMP112_ALT_ADDR_4 0x43
/* Configuration ************************************************************/
/* Prerequisites:
*
* CONFIG_SENSORS_TMP112
* Enables support for the TMP112 driver
*/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Name: tmp112_register
*
* Description:
* Register the TMP112 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.
* addr - The I2C address to use.
* When multiple sensors are connected to the same bus, each one
* must be electrically configured to use a different I2C
* address as specified in the datasheet.
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int tmp112_register(FAR const char *devpath, FAR struct i2c_master_s *i2c,
uint8_t addr);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* CONFIG_I2C && CONFIG_SENSORS_TMP112 */
#endif /* __INCLUDE_NUTTX_SENSORS_TMP112_H */