Diff: MAX17043.cpp

Revision:

0:8d34cc2ff388

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX17043.cpp	Sun Mar 16 01:48:59 2014 +0000
@@ -0,0 +1,82 @@
+/* MAX17043.cpp
+ * Tested with mbed board: FRDM-KL46Z
+ * Author: Mark Gottscho
+ * mgottscho@ucla.edu
+ */
+
+ 
+#include "mbed.h"
+#include "I2CSensor.h"
+#include "PeriodicSensor.h"
+#include "MAX17043.h"
+
+
+MAX17043::MAX17043(PinName sda, PinName scl, int i2c_addr) :
+                                I2CSensor(sda, scl, i2c_addr),
+                                PeriodicSensor(0.5), //Default max sampling rate of 2 Hz, because the device internally samples every 500ms after initial POS report
+                                __soc(0),
+                                __vcell(0)
+                                {
+}
+
+MAX17043::~MAX17043() { }
+
+void MAX17043::selfInit() {
+    __i2c.frequency(400000);
+    reset();
+}
+
+void MAX17043::reset() {
+    __disable_irq();
+    uint16_t data = RST_CODE;
+    setRegister16b(COMMAND_MSB, data);
+    __enable_irq();
+    wait(0.130); //wait 130ms until first readings are valid (125ms est)
+}
+
+uint16_t MAX17043::getVersion() {
+    uint8_t data = getRegister(VERSION_MSB);
+    return (data << 8) | (getRegister(VERSION_LSB));
+}
+
+uint16_t MAX17043::getVCell(bool sampleNow) {
+    __disable_irq();
+    
+    if (sampleNow) {
+        uint16_t data = getRegister16b(VCELL_MSB);
+        __vcell = data >> 4; //right shift by 4 to throw out the don't care bits
+    }
+    __dataReady = false;
+    
+    __enable_irq();
+    
+    return __vcell;
+}
+ 
+float MAX17043::getFloatVCell(bool sampleNow) {
+    return getVCell(sampleNow) * DIV_VCELL;       
+}
+    
+uint16_t MAX17043::getSOC(bool sampleNow) {
+    __disable_irq();
+    
+    if (sampleNow) {
+        uint8_t data = getRegister(SOC_MSB);
+        __soc =  (data << 8) | (getRegister(SOC_LSB));
+    }
+    __dataReady = false;
+    
+    __enable_irq();
+    
+    return __soc;
+}
+
+float MAX17043::getFloatSOC(bool sampleNow) {
+    return getSOC(sampleNow) * DIV_SOC;   
+}
+
+void MAX17043::__sample_data_ISR() {
+    getSOC(true);
+    getVCell(true);
+    __dataReady = true;
+}
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