86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
/****************************************************************************
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* boards/arm/mx8mp/verdin-mx8mp/src/mx8mp_ina219.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 "mx8mp_i2c.h"
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#include "mx8mp_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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* devno - The device number, used to build the device path as /dev/inaN
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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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int ret;
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sninfo("Initializing INA219!\n");
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/* Initialize I2C */
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i2c = mx8mp_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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ret = ina219_register("/dev/ina219", i2c, 0x40, 10000, 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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