adc example

main.c

@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+// Path to the raw adc's values:
+#define ADC_PATH "/sys/bus/iio/devices/iio:device0/in_voltage%d_raw"
+
+// Prototype Functions:
+
+// 1 Function to read ADC value from a given channel (0 to 6) 
+int ReadADC(int channel);
+
+
+// main:
+int main( ) {
+    printf("Starting ADC program\n");
+
+    int channel = 0; // select the channel 0 - 6
+    int adcVal = ReadADC(channel);
+
+    if (adcVal >= 0) {
+        printf("ADC Channel %d raw value: %d\n", channel, adcVal);
+    } else {
+        printf("Failed to read ADC value\n");
+    }
+    return 0;
+}
+
+
+int ReadADC(int channel) {
+    char filePath[64];
+    char buffer[16];
+    int fd, adcValue;
+
+    // file path to adc
+    snprintf(filePath, sizeof(filePath), ADC_PATH, channel);
+    //printf(filePath);
+
+    // open the ADC file 
+    fd = open(filePath, O_RDONLY);
+    if (fd < 0){
+        perror("Unable to open ADC Path");
+        return -1;
+    }
+
+    // read ADC value
+if (read(fd, buffer, sizeof(buffer)) < 0) {
+    perror("Unable to read ADC value");
+    close(fd);
+    return -1;
+    }
+    
+    // converting string to int
+    adcValue = atoi(buffer);
+    close(fd);
+
+    return adcValue;
+}