* Add C Program to write configuration

sw/config

@@ -0,0 +1,13 @@
+#Feedback Loop Configuration File
+#
+#Each line of this file defines a configuration slot and consists of integer numbers delimited by white spaces in the following order:
+#ADDSUB_MODE ADD_INPUT_MUX DELAY FACTOR TIMESTAMP
+#
+#ADDSUB_MODE:   Select feedback mode (0=negative, 1=positive)
+#ADD_INPUT_MUX: Select feedback input (0=GND[only ADC Input 1], 1=ADC Input 2[Both ADC inputs are used])
+#DELAY:         Clock cycles counts (50 ns period) to delay the feedback signal [0-255]
+#FACTOR:        Multiplication factor to apply to the feedback signal [0-15] (NOTE: Integer is intepreted as a 1Q3 Fixed Point Number!)
+#TIMESTAMP:     Defines the clock count number from the sync pulse from which on the configurations settings will be applied. [32-bit unsigned integer] 
+#               First Config slot should have a timestamp equal to zero.
+1   0   0   8   0
+0   0   0   8   1200000000

sw/write_config.c

@@ -0,0 +1,89 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+void bail();
+
+FILE* src = NULL;
+int dest = -1;
+char* line = NULL;
+size_t len = 0;
+
+
+int main(int argc, char *argv[]){
+
+    if (argc != 3){
+        fprintf(stderr,"USAGE:\n %s source-file target-file\n", argv[0]);
+        return -1;
+    }
+    
+    // Open Source Configuration File
+    src = fopen(argv[1], "r");
+    if(src == NULL){
+        perror("Failed to open file");
+        bail();
+        return -1;
+    }
+    
+    // Open Destination File
+    dest = open(argv[2], O_WRONLY);
+    if(dest == -1){
+        perror("Failed to open file");
+        bail();
+        return -1;
+    }
+    
+    uint64_t data, addsub_mode, add_input_mode, delay, factor, timestamp;
+    
+    /*File Parsing Loop*/
+    while(getline(&line, &len, src) != -1){
+        //Check if Comment Line
+        if(line[0] == '#'){
+            continue;
+        }
+        
+        if(sscanf(line, "%u %u %u %u %u", &addsub_mode, &add_input_mode, &delay, &factor, &timestamp) < 5){
+            perror("Parsing of configuration file failed");
+            fprintf(stderr, "Failing line: %s", line);
+            bail();
+            return -1;
+        }
+        
+        data = 0x0;
+        data |= ((uint64_t)0x1 << 63) | ((addsub_mode & 0x1) << 62) | ((add_input_mode & 0x1) << 61) | ((delay & 0xFF) << 40) | 
+            ((factor & 0xF) << 32) | (timestamp & 0xFFFFFFFF);
+        if(write(dest, &data, sizeof(uint64_t)) != sizeof(uint64_t)){
+            perror("Failed to write data");
+            bail();
+            return -1;
+        }
+    }
+    
+    //Write A non enabled slot
+    data = 0x0;
+    if(write(dest, &data, sizeof(uint64_t)) != sizeof(uint64_t)){
+            perror("Failed to write data");
+            bail();
+            return -1;
+        }
+    
+    //Exit safely
+    bail();
+    return 0;
+}
+
+void bail(){
+    if(src != NULL){
+        (void)fclose(src);
+    }
+    if(dest != -1){
+        (void)close(dest);
+    }
+    if(line != NULL){
+        free(line);
+    }
+}