Diff: INA219.cpp

Revision:

0:a3b41ab8433b

Child:

1:fea983b0385b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/INA219.cpp	Sun Mar 15 11:07:54 2015 +0000
@@ -0,0 +1,208 @@
+/*
+ * mbed library program
+ *  High-Side Measurement,Bi-Directional CURRENT/POWER MONITOR with I2C Interface
+ *  by Texas Instruments
+ *
+ * Copyright (c) 2015 Kenji Arai / JH1PJL
+ *  http://www.page.sannet.ne.jp/kenjia/index.html
+ *  http://mbed.org/users/kenjiArai/
+ *      Created: January   25th, 2015
+ *      Revised: March     15th, 2015
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
+ * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include    "mbed.h"
+#include    "INA219.h"
+
+INA219::INA219 (PinName p_sda, PinName p_scl, const INA219_TypeDef *ina219_parameter) :
+    _i2c(p_sda, p_scl)
+{
+    _i2c.frequency(100000);
+    ina219_set_data = *ina219_parameter;
+    initialize();
+}
+
+INA219::INA219 (PinName p_sda, PinName p_scl, uint8_t addr) :
+    _i2c(p_sda, p_scl)
+{
+    _i2c.frequency(100000);
+    // Use standard setting
+    ina219_set_data = ina219_std_paramtr;
+    // Change user defined address
+    ina219_set_data.addr = addr;
+    initialize();
+}
+
+INA219::INA219 (PinName p_sda, PinName p_scl) :
+    _i2c(p_sda, p_scl)
+{
+    _i2c.frequency(100000);
+    // Use standard setting
+    ina219_set_data = ina219_std_paramtr;
+    initialize();
+}
+
+INA219::INA219 (I2C& p_i2c, const INA219_TypeDef *ina219_parameter) : _i2c(p_i2c)
+{
+    _i2c.frequency(100000);
+    ina219_set_data = *ina219_parameter;
+    initialize();
+}
+
+INA219::INA219 (I2C& p_i2c, uint8_t addr) : _i2c(p_i2c)
+{
+    _i2c.frequency(100000);
+    // Use standard setting
+    ina219_set_data = ina219_std_paramtr;
+    // Change user defined address
+    ina219_set_data.addr = addr;
+    initialize();
+}
+
+INA219::INA219 (I2C& p_i2c) : _i2c(p_i2c)
+{
+    _i2c.frequency(100000);
+    // Use standard setting
+    ina219_set_data = ina219_std_paramtr;
+    initialize();
+}
+
+/////////////// Read Current //////////////////////////////
+float INA219::read_current()
+{
+    dt[0] = INA219_CURRENT;
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 1, true);
+    _i2c.read((int)ina219_set_data.addr, (char *)dt, 2, false);
+    uint16_t data = (dt[0] << 8) | dt[1];
+    return (float)data * 0.025f;
+}
+
+/////////////// Read Power ////////////////////////////////
+float INA219::read_power()
+{
+    dt[0] = INA219_POWER;
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 1, true);
+    _i2c.read((int)ina219_set_data.addr, (char *)dt, 2, false);
+    uint16_t data = (dt[0] << 8) + dt[1];
+    return (float)data * 0.0005;
+}
+
+/////////////// Read Bus_volt /////////////////////////////
+float INA219::read_bus_voltage()
+{
+    dt[0] = INA219_BUS_VOLT;
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 1, true);
+    _i2c.read((int)ina219_set_data.addr, (char *)dt, 2, false);
+    uint16_t data = ((dt[0] << 8) + dt[1]) >> 3;
+    return (float)data * 0.004f;
+}
+
+/////////////// Read Shunt volt ///////////////////////////
+float INA219::read_shunt_voltage()
+{
+    dt[0] = INA219_SHUNT_V;
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 1, true);
+    _i2c.read((int)ina219_set_data.addr, (char *)dt, 2, false);
+    uint16_t data = (dt[0] << 8) + dt[1];
+    return (float)data;
+}
+
+float INA219::read_current_by_shuntvolt()
+{
+    dt[0] = INA219_SHUNT_V;
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 1, true);
+    _i2c.read((int)ina219_set_data.addr, (char *)dt, 2, false);
+    uint16_t data = (dt[0] << 8) + dt[1];
+    return (float)data * 0.1;
+//    return ((float)data / ina219_set_data.shunt_register) / 1000;
+}
+
+/////////////// Read configulation ////////////////////////
+uint16_t INA219::read_config()
+{
+    dt[0] = INA219_CONFIG;
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 1, true);
+    _i2c.read((int)ina219_set_data.addr, (char *)dt, 2, false);
+    uint16_t data = (dt[0] << 8) | dt[1];
+    return data;
+}
+
+/////////////// Set configulation /////////////////////////
+uint16_t INA219::set_config(uint16_t cfg)
+{
+    uint16_t data = cfg;
+    dt[0] = INA219_CONFIG;
+    dt[1] = data >> 8;    // MSB 1st
+    dt[2] = data & 0xff;  // LSB 2nd
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 3, false);
+    return data;
+}
+
+/////////////// Read Calibration reg. /////////////////////
+uint16_t INA219::read_calb(void)
+{
+    dt[0] = INA219_CALBLATION;
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 1, true);
+    _i2c.read((int)ina219_set_data.addr, (char *)dt, 2, false);
+    uint16_t data = (dt[0] << 8) | dt[1];
+    return data;
+}
+
+/////////////// Set Calibration reg. //////////////////////
+uint16_t INA219::set_calb(uint16_t clb)
+{
+    uint16_t data = clb;
+    dt[0] = INA219_CALBLATION;
+    dt[1] = data >> 8;    // MSB 1st
+    dt[2] = data & 0xff;  // LSB 2nd
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 3, false);
+    return data;
+}
+
+/////////////// Read/Write specific register //////////////
+uint8_t INA219::read_reg(uint8_t addr)
+{
+    dt[0] = addr;
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 1, true);
+    _i2c.read((int)ina219_set_data.addr, (char *)dt, 1, false);
+    return dt[0];
+}
+
+uint8_t INA219::write_reg(uint8_t addr, uint8_t data)
+{
+    dt[0] = addr;
+    dt[1] = data;
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 2, false);
+    return dt[1];
+}
+
+/////////////// Initialize ////////////////////////////////
+void INA219::initialize()
+{
+    uint16_t data = 0;
+    data  = ina219_set_data.v_max << 13;
+    data += ina219_set_data.gain << 11;
+    data += ina219_set_data.adc_resolution << 3; // use same vale for BUS & SHUNT
+    data += ina219_set_data.adc_resolution << 6;
+    data += ina219_set_data.mode;
+    dt[0] = INA219_CONFIG;
+    dt[1] = data >> 8;    // MSB 1st
+    dt[2] = data & 0xff;  // LSB 2nd
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 3, false);
+    dt[0] = INA219_CALBLATION;
+    dt[1] = ina219_set_data.calibration_data >> 8;    // MSB 1st
+    dt[2] = ina219_set_data.calibration_data & 0xff;  // LSB 2nd
+    _i2c.write((int)ina219_set_data.addr, (char *)dt, 3, false);
+    scale_factor = 0;
+}
+
+/////////////// I2C Freq. /////////////////////////////////
+void INA219::frequency(int hz)
+{
+    _i2c.frequency(hz);
+}