122 lines
3.7 KiB
C
122 lines
3.7 KiB
C
/****************************************************************************
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* boards/arm/stm32f0l0g0/stm32g071b-disco/src/stm32_ina226.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 <debug.h>
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#include <nuttx/i2c/i2c_master.h>
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#include <nuttx/sensors/ina226.h>
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#include "stm32_i2c.h"
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#include "stm32g071b-disco.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef CONFIG_STM32F0L0G0_I2C1
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# error I2C1 must be enabled!
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#endif
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#define INA226_1_I2C_ADDR 0x40 /* VBUS */
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#define INA226_2_I2C_ADDR 0x41 /* CC1 */
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#define INA226_3_I2C_ADDR 0x42 /* CC2 */
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#define INA226_I2C_BUS 1
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#define INA226_SHUNT_VAL 15000
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_ina226_initialization
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*
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* Description:
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* Initialize and configure the INA226
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*
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****************************************************************************/
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int stm32_ina226_initialization(void)
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{
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struct i2c_master_s *i2c = NULL;
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static bool initialized = false;
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int ret = OK;
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/* Have we already initialized? */
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if (!initialized)
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{
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/* No.. Get the I2C bus driver */
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i2c = stm32_i2cbus_initialize(INA226_I2C_BUS);
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if (!i2c)
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{
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serr("ERROR: Failed to initialize I2C%d\n", INA226_I2C_BUS);
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goto errout;
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}
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/* Now bind the I2C interface to the INA226 drivers */
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ret = ina226_register("/dev/ina226_1",
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i2c, INA226_1_I2C_ADDR,
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INA226_SHUNT_VAL, 0);
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if (ret < 0)
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{
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serr("ERROR: Failed to bind I2C%d to the INA226_1 driver\n",
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INA226_I2C_BUS);
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goto errout;
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}
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ret = ina226_register("/dev/ina226_2",
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i2c, INA226_2_I2C_ADDR,
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INA226_SHUNT_VAL, 0);
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if (ret < 0)
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{
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serr("ERROR: Failed to bind I2C%d to the INA226_2 driver\n",
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INA226_I2C_BUS);
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goto errout;
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}
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ret = ina226_register("/dev/ina226_3",
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i2c, INA226_3_I2C_ADDR,
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INA226_SHUNT_VAL, 0);
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if (ret < 0)
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{
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serr("ERROR: Failed to bind I2C%d to the INA226_3 driver\n",
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INA226_I2C_BUS);
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goto errout;
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}
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/* Now we are initialized */
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initialized = true;
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}
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errout:
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return ret;
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}
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