104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/****************************************************************************
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* boards/arm/rp2040/common/src/rp2040_ina219.c
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*
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* Copyright (C) 2018 Erle Robotics (Juan Flores Muñoz). All rights
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* reserved.
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* Author: Erle Robotics (Juan Flores Muñoz) <juan@erlerobotics.com>
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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 <syslog.h>
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#include <debug.h>
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#include <stdio.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/sensors/ina219.h>
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#include "rp2040_i2c.h"
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#include "rp2040_ina219.h"
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/****************************************************************************
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* Pre-processor Definitions
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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: board_ina219_initialize
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*
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* Description:
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* Initialize and register the INA219 voltage/current sensor.
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*
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* Input parameters:
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* busno - The I2C bus number
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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 board_ina219_initialize(int busno)
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{
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struct i2c_master_s *i2c;
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char devpath[14];
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int ret;
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const int devno = 0;
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sninfo("Initializing INA219!\n");
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/* Initialize I2C */
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i2c = rp2040_i2cbus_initialize(busno);
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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 sensor */
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snprintf(devpath, 14, "/dev/voltamp%d", devno);
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ret = ina219_register(devpath, i2c, 0x40, 100000, 0x00);
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if (ret < 0)
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{
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syslog(LOG_ERR, "ERROR: Error registering ina219\n");
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}
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return ret;
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}
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