1 files changed, 51 insertions, 0 deletions
diff --git a/Resources/OpenPLCv2/firmware/ADC.test.arduino/one/libraries/vishnuADC.cpp b/Resources/OpenPLCv2/firmware/ADC.test.arduino/one/libraries/vishnuADC.cpp
new file mode 100644
index 0000000..01d6931
--- /dev/null
+++ b/Resources/OpenPLCv2/firmware/ADC.test.arduino/one/libraries/vishnuADC.cpp
@@ -0,0 +1,51 @@
+#include "vishnuADC.h"
+#include "Arduino.h"
+
+/**
+ * Constructor of the class
+ * @param io_pin_cs a byte indicating the pin to be use as the chip select pin (CS)
+ */
+ADS1118::ADS1118(uint8_t io_pin_cs) {
+    cs = io_pin_cs;
+}
+
+/**
+ * This method initialize the SPI port and the config register
+ */
+void ADS1118::begin() {
+    pinMode(cs, OUTPUT);
+	digitalWrite(cs, HIGH);
+    SPI.begin();
+    SPI.beginTransaction(SPISettings(SCLK, MSBFIRST, SPI_MODE1));
+	configRegister.bits={RESERVED, VALID_CFG, PULLUP, ADC_MODE, RATE_8SPS, SINGLE_SHOT, FSR_0256, DIFF_0_1, START_NOW}; //Default values
+}
+
+/**
+ * Getting the temperature in degrees celsius from the internal sensor of the ADS1118
+ * @return A double (32bits) containing the temperature in degrees celsius of the internal sensor
+ */
+double ADS1118::getTemperature() {
+    uint16_t convRegister;
+    uint8_t dataMSB, dataLSB, configMSB, configLSB, count=0;
+	if(lastSensorMode==TEMP_MODE)
+		count=1;  //Lucky you! We don't have to read twice the sensor
+	else
+		configRegister.bits.sensorMode=TEMP_MODE; //Sorry but we will have to read twice the sensor
+    do{
+		digitalWrite(cs, LOW);
+		dataMSB = SPI.transfer(configRegister.byte.msb);
+		dataLSB = SPI.transfer(configRegister.byte.lsb);
+		configMSB = SPI.transfer(configRegister.byte.msb);
+		configLSB = SPI.transfer(configRegister.byte.lsb);
+		digitalWrite(cs, HIGH);
+		for(int i=0;i<CONV_TIME[configRegister.bits.rate];i++) //Lets wait the conversion time
+			delayMicroseconds(1000);
+		count++;
+	}while (count<=1);  //We make two readings because the second reading is the temperature.
+	convRegister = ((dataMSB << 8) | (dataLSB))>>4;
+    if((convRegister<<2) >= 0x8000){
+		convRegister=((~convRegister)>>2)+1; //Converting to right-justified and applying binary twos complement format
+        return (double)(convRegister*0.03125*-1);
+    }
+    return (double)convRegister*0.03125;
+}
+\ No newline at end of file