[vishnu] unknown

1 files changed, 65 insertions, 0 deletions

diff --git a/firmware/ADC.test.arduino/trial.c b/firmware/ADC.test.arduino/trial.c
index e69de29..fae88f6 100644..100755
--- a/firmware/ADC.test.arduino/trial.c
+++ b/firmware/ADC.test.arduino/trial.c
@@ -0,0 +1,65 @@
+
+#define SELPIN 10 //Selection Pin
+#define DATAOUT 11//MOSI
+#define DATAIN  12//MISO
+#define SPICLOCK  13//Clock
+int readvalue;
+
+void setup(){
+//set pin modes
+pinMode(SELPIN, OUTPUT);
+pinMode(DATAOUT, OUTPUT);
+pinMode(DATAIN, INPUT);
+pinMode(SPICLOCK, OUTPUT);
+//disable device to start with
+digitalWrite(SELPIN,HIGH);
+digitalWrite(DATAOUT,LOW);
+digitalWrite(SPICLOCK,LOW);
+
+Serial.begin(9600);
+}
+
+int read_adc(int channel){
+ int adcvalue = 0;
+ byte commandbits = B11000000; //command bits - start, mode, chn (3), dont care (3)
+ 
+ //allow channel selection
+ commandbits|=((channel-1)<<3);
+
+ digitalWrite(ADCSEL,LOW); //Select adc
+ // setup bits to be written
+ for (int i=7; i>=3; i--){
+   digitalWrite(DATAOUT,commandbits&1<<i);
+   //cycle clock
+   digitalWrite(SPICLOCK,HIGH);
+   digitalWrite(SPICLOCK,LOW);    
+ }
+
+ digitalWrite(SPICLOCK,HIGH);    //ignores 2 null bits
+ digitalWrite(SPICLOCK,LOW);
+ digitalWrite(SPICLOCK,HIGH);  
+ digitalWrite(SPICLOCK,LOW);
+
+ //read bits from adc
+ for (int i=11; i>=0; i--){
+   adcvalue+=digitalRead(DATAIN)<<i;
+   //cycle clock
+   digitalWrite(SPICLOCK,HIGH);
+   digitalWrite(SPICLOCK,LOW);
+ }
+ digitalWrite(ADCSEL, HIGH); //turn off device
+ return adcvalue;
+}
+
+digitalWrite(SELPIN, HIGH); //turn off device
+return adcvalue;
+}
+
+void loop() {
+readvalue = read_adc(1);
+Serial.println(readvalue,DEC);
+readvalue = read_adc(2);
+Serial.println(readvalue,DEC);
+Serial.println(" ");
+delay(250);
+}