Diff: INA226.cpp

Revision:

0:3a05c5755625

Child:

1:e0ebc6af5e04

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/INA226.cpp	Sat Nov 24 18:15:16 2012 +0000
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2011 Toshihisa T
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+
+#include "mbed.h"
+#include "INA226.hpp"
+
+INA226::INA226(I2C &i2c_,int addr_,int freq_) : i2c(i2c_),i2c_addr(addr_),freq(freq_)
+{
+    i2c.frequency(freq);
+}
+
+int INA226::isExist(void)
+{
+    char p_addr = 0;   //Select Configuration Register.
+    i2c.frequency(freq);
+    if(i2c.write(i2c_addr | 0,&p_addr,sizeof(p_addr)) == 0){
+        return 1;
+    }
+    return 0;
+}
+
+int INA226::rawWrite(char pointer_addr,unsigned short val_)
+{
+    char val[3];
+    val[0] = pointer_addr;
+    val[1] = static_cast<char>((val_ >> 8) & 0x00ff);
+    val[2] = static_cast<char>(val_ & 0x00ff);
+    i2c.frequency(freq);
+    if(i2c.write(i2c_addr | 0,val,sizeof(val)) == 0){
+        return 0;
+    }
+    return 1;
+}
+
+int INA226::rawRead(char pointer_addr,unsigned short *val_)
+{
+    char p_addr = pointer_addr;
+    char val[2];
+    i2c.frequency(freq);
+    if(i2c.write(i2c_addr | 0,&p_addr,sizeof(p_addr)) == 0){
+        if(i2c.read(i2c_addr | 0x01,val,sizeof(val)) == 0){
+            *val_ = static_cast<unsigned short>(val[0]);
+            *val_ = (*val_ << 8) | static_cast<unsigned short>(val[1]);
+            return 0;
+        }
+    }
+    return 1;
+}
+
+int INA226::getVoltage(double *V_)
+{
+    unsigned short val;
+    if(rawRead(0x02,&val) == 0){
+        *V_ = static_cast<double>(val) * 1.25;
+        return 0;
+    }
+    return 1;
+}
+
+int INA226::getCurrent(double *I_)
+{
+    unsigned short val;
+    if(rawRead(0x04,&val) == 0){
+        char *s_p = reinterpret_cast<char *>(&val);
+        short d_s;
+        char *d_p = reinterpret_cast<char *>(&d_s);
+        *(d_p + 0) = *(s_p + 0);
+        *(d_p + 1) = *(s_p + 1);
+        *I_ = static_cast<double>(d_s) /* * 1.25 */;
+        return 0;
+    }
+    return 1;
+}
+
+int INA226::setCurrentCalibration(unsigned short val)
+{
+    return rawWrite(0x05,val);
+}