João Sousa / INA2xx

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API Documentation at this revision

Revision 0:726b368625a9, committed 2022-10-11

Comitter:
jotaemesousa
Date:
Tue Oct 11 21:09:04 2022 +0000
Commit message:
last;

Changed in this revision

ina2xx.cpp Show annotated file Show diff for this revision Revisions of this file
ina2xx.h Show annotated file Show diff for this revision Revisions of this file 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ina2xx.cpp	Tue Oct 11 21:09:04 2022 +0000
@@ -0,0 +1,77 @@
+/*
+ * ina2xx.c
+ *
+ *  Created on: 26 de Set de 2015
+ *      Author: João Sousa
+ */
+
+
+#include "ina2xx.h"
+
+bool ina226_get(I2C *i2c, uint8_t ina_addr, uint16_t *value)
+{
+    uint8_t i2c_read_data[2];
+    i2c_read_data[0] = ina_addr;
+    i2c->write(INA226_ADDR, (const char *)i2c_read_data, 1);
+    bool v = i2c->read(INA226_ADDR, (char *)i2c_read_data, 2);
+    *value = (i2c_read_data[0] << 8) | i2c_read_data[1];
+    return v;
+}
+
+bool ina226_set(I2C *i2c, uint8_t ina_addr, uint16_t value)
+{
+    uint8_t i2c_read_data[3];
+    i2c_read_data[0] = ina_addr;
+    i2c_read_data[1] = value >> 8;
+    i2c_read_data[2] = value & 0xFF;
+    return i2c->write(INA226_ADDR, (const char *)i2c_read_data, 3);
+}
+
+
+float ina226GetVoltage(I2C *i2c, bool *ret_op)
+{
+    int16_t conf_reg;
+    bool ret = ina226_get(i2c, 0x02, (uint16_t *)&conf_reg);
+    float voltage;
+    if(!ret)
+    {
+        *ret_op = true;
+        voltage = (conf_reg);
+        voltage *= 0.00125;
+        return voltage;
+    }
+    *ret_op = false;
+    return 0;
+}
+
+float ina226GetShuntVoltage(I2C *i2c, bool *ret_op)
+{
+    int16_t conf_reg;
+    bool ret = ina226_get(i2c, 0x01, (uint16_t *)&conf_reg);
+    float voltage;
+    if (!ret)
+    {
+        *ret_op = true;
+        voltage = (conf_reg);
+        voltage *= 0.0025;
+        return voltage;
+    }
+    *ret_op = false;
+    return 0;
+}
+
+float ina226GetCurrent(I2C *i2c, bool *ret_op)
+{
+    int16_t conf_reg;
+    bool ret = ina226_get(i2c, 0x04, (uint16_t *)&conf_reg);
+    float current;
+    if(!ret)
+    {
+        *ret_op = true;
+        current = conf_reg;
+        current /= 1173.0;
+        return current;
+    }
+    *ret_op = false;
+    return 0;
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ina2xx.h	Tue Oct 11 21:09:04 2022 +0000
@@ -0,0 +1,24 @@
+/*
+ * ina2xx.h
+ *
+ *  Created on: 26 de Set de 2015
+ *      Author: João Sousa
+ */
+
+#ifndef INA2XX_H_
+#define INA2XX_H_
+
+#include "mbed.h"
+
+
+#define INA226_ADDR     0x8A
+
+void init_i2c();
+bool ina226_get(I2C *i2c, uint8_t ina_addr, uint16_t *value);
+bool ina226_set(I2C *i2c, uint8_t ina_addr, uint16_t value);
+float ina226GetVoltage(I2C *i2c, bool *ret_op);
+float ina226GetShuntVoltage(I2C *i2c, bool *ret_op);
+float ina226GetCurrent(I2C *i2c, bool *ret_op);
+
+
+#endif /* INA2XX_H_ */
\ No newline at end of file