Diff: ltc2460.cpp

Revision:

0:7f26ce7f8ff5

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ltc2460.cpp	Mon May 11 09:28:24 2015 +0000
@@ -0,0 +1,50 @@
+#include "ltc2460.h"
+
+
+LTC2460::LTC2460(PinName csPin , PinName mosiPin, PinName misoPin, PinName sckPin,double resDividerVal ): mCSpin(csPin), mSpi(mosiPin, misoPin, sckPin){
+    
+     mResDividerVal= resDividerVal ;
+    if(!initLTC2460()){}; //while(1); //TODO handle error
+
+}   
+    
+    
+bool LTC2460::initLTC2460(void){     
+   //  uint8_t  data;
+    // Setup the spi for 16 bit data
+    // second edge capture, with a 1MHz clock rate
+     mSpi.format(16,0);
+     mSpi.frequency(1000000);
+     return true;
+}
+
+
+uint16_t LTC2460::spiRead(void)
+{
+    __disable_irq();    // Disable Interrupts
+    mCSpin=0;
+    uint16_t val = mSpi.write(0); // The written value is ignored, reg value is read
+    mCSpin = 1;
+    __enable_irq();     // Enable Interrupts
+    return val;
+}
+
+void LTC2460::spiWrite(uint16_t value)
+{
+    __disable_irq();    // Disable Interrupts
+    mCSpin = 0;
+    mSpi.write(value); // New value follows
+    mCSpin= 1;
+    __enable_irq();     // Enable Interrupts
+}
+
+float LTC2460::readVoltage()
+{  
+  
+   uint16_t rawData=spiRead() ;
+   float temp = (float)((1.25/0xFFFF)*rawData);
+   float val = temp*mResDividerVal+temp;
+   return val;
+}
+
+