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MCP6002

+#include <SPI.h>
+ 
+const int PIN_CS = 10;
+const int GAIN_1 = 0x1;
+const int GAIN_2 = 0x0;
+ 
+void setup()
+{
+  Serial.begin(300);
+  pinMode(PIN_CS, OUTPUT);
+  SPI.begin();  
+  SPI.setClockDivider(SPI_CLOCK_DIV2);
+}
+ 
+//assuming single channel, gain=2
+void setOutput(unsigned int val)
+{
+  byte lowByte = val & 0xff;
+  byte highByte = ((val >> 8) & 0xff) | 0x10;
+   
+  PORTB &= 0xfb;
+  SPI.transfer(highByte);
+  SPI.transfer(lowByte);
+  PORTB |= 0x4;
+}
+ 
+void setOutput(byte channel, byte gain, byte shutdown, unsigned int val)
+{
+  byte lowByte = val & 0xff;
+  byte highByte = ((val >> 8) & 0xff) | channel << 7 | gain << 5 | shutdown << 4;
+   
+  PORTB &= 0xfb;
+  SPI.transfer(highByte);
+  SPI.transfer(lowByte);
+  PORTB |= 0x4;
+}
+ 
+void loop()
+{
+ //high-res sine wave
+ for (int i=0; i < 256; i+=1)   
+ {
+  //setOutput(0, GAIN_2, 1, i);
+  double a = (((double)i*(22/7))/127.5);
+  double b = ((sin(a)*0.5)+0.5)*255;
+  setOutput((int)b);
+  //Serial.println((int)b);
+  Serial.println(analogRead(A0));
+ }
+ 
+}
+ 
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