michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: sensor: Add driver for TI INA23x

Browse source 
This driver supports the TI INA230 and INA231 Bidirectional Current
and Power Monitors. The devices work on the I2C interface and are
created from DT nodes with a compatible property matching "ti,ina23x".

The following datasheets were referenced while developing the driver:
https://www.ti.com/product/INA230
https://www.ti.com/product/INA231

Twister passed:
twister -T tests/drivers/build_all/sensor/

Testing was performed on the stm32g071b_disco board with the following:
Load:    ~170 ohms
Voltage: 5V

Measured Values:
Voltage: 5.1 V
Current: 0.032 A
Power:   0.157 W

Signed-off-by: Sam Hurst <sbh1187@gmail.com>
This commit is contained in:
Sam Hurst 2021-05-03 10:36:56 -07:00 • committed by Christopher Friedt
commit 1382d64ed5
13 changed files with 678 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

67
include/dt-bindings/sensor/ina23x.h Normal file
View file

@ -0,0 +1,67 @@
/*
* Copyright 2021 The Chromium OS Authors
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_INA23X_H_
#define ZEPHYR_INCLUDE_DT_BINDINGS_INA23X_H_
#include <dt-bindings/dt-util.h>
/* Mask/Enable bits that asserts the ALERT pin */
#define INA23X_SHUNT_VOLTAGE_OVER BIT(15)
#define INA23X_SHUNT_VOLTAGE_UNDER BIT(14)
#define INA23X_BUS_VOLTAGE_OVER BIT(13)
#define INA23X_BUS_VOLTAGE_UNDER BIT(12)
#define INA23X_OVER_LIMIT_POWER BIT(11)
#define INA23X_CONVERSION_READY BIT(10)
#define INA23X_ALERT_FUNCTION_FLAG BIT(4)
#define INA23X_CONVERSION_READY_FLAG BIT(3)
#define INA23X_MATH_OVERFLOW_FLAG BIT(2)
#define INA23X_ALERT_POLARITY BIT(1)
#define INA23X_ALERT_LATCH_ENABLE BIT(0)
/* Operating Mode */
#define INA23X_OPER_MODE_POWER_DOWN 0x00
#define INA23X_OPER_MODE_SHUNT_VOLTAGE_TRIG 0x01
#define INA23X_OPER_MODE_BUS_VOLTAGE_TRIG 0x02
#define INA23X_OPER_MODE_SHUNT_BUS_VOLTAGE_TRIG 0x03
#define INA23X_OPER_MODE_SHUNT_VOLTAGE_CONT 0x05
#define INA23X_OPER_MODE_BUS_VOLTAGE_CONT 0x06
#define INA23X_OPER_MODE_SHUNT_BUS_VOLTAGE_CONT 0x07
/* Conversion time for bus and shunt in micro-seconds */
#define INA23X_CONV_TIME_140 0x00
#define INA23X_CONV_TIME_204 0x01
#define INA23X_CONV_TIME_332 0x02
#define INA23X_CONV_TIME_588 0x03
#define INA23X_CONV_TIME_1100 0x04
#define INA23X_CONV_TIME_2116 0x05
#define INA23X_CONV_TIME_4156 0x06
#define INA23X_CONV_TIME_8244 0x07
/* Averaging Mode */
#define INA23X_AVG_MODE_1 0x00
#define INA23X_AVG_MODE_4 0x01
#define INA23X_AVG_MODE_16 0x02
#define INA23X_AVG_MODE_64 0x03
#define INA23X_AVG_MODE_128 0x04
#define INA23X_AVG_MODE_256 0x05
#define INA23X_AVG_MODE_512 0x06
#define INA23X_AVG_MODE_1024 0x07
/**
* @brief Macro for creating the INA23X configuration value
*
* @param mode Operating mode.
* @param svct Conversion time for shunt voltage.
* @param bvct Conversion time for bus voltage.
* @param avg Averaging mode.
*/
#define INA23X_CONFIG(mode, \
svct, \
bvct, \
avg) \
(((avg) << 9) | ((bvct) << 6) | ((svct) << 3) | (mode))
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_INA23X_H_ */