Lindo e funcionando, mas instavel como sempre

Signed-off-by: Jedian <jmb15@c3sl.ufpr.br>

cMIPS/tests/jedidafu.c

@@ -128,39 +128,29 @@ int int2hex (char *c, int i) {
     return j-1;
 }
 
-
-
 int main(void) { // receive a string through the UART serial interface
     int i, j;    // and responds with the i-eth hex-based fibonacci sequence number
     volatile int state = 0;
     volatile Tstatus status;
     char filona[145], c;
-    int hdona = 0;
-    int tlona = 0;
-    int filonx = 0;
-    int valfib, qt, rxz, q;
-    int fim = 0;
+    int hdona = 0;  // head of the big queue
+    int tlona = 0;  // tail of the big queue
+    int filonx = 0; // store the number of received integers to be processed
+    int valfib, qt, rxz, q; // auxiliar variables
     char p[15];
     Tcontrol ctrl;
     uart = (void *)IO_UART_ADDR; // bottom of UART address range
 
-    i = -1;
-    Ud.ntx = 16;
+    Ud.ntx = 16; // initializing number of empty spaces in tx queue
     ioctl(ctrl_util(2, 1, 1, 1)); // Speed = 2, intRX = 1, intTX = 1, rts = 1
 
     do {
-        state++;
-        // se tirar fode (b520 vira 15)
-        while(!proberx()) to_stdout('-');//i = 1 - i;
-        //to_stdout('\0');    
-        // es
-        while((c=Getc()) != -1){
+        state++; // state is a volatile variable just for optimize blocking
+
+        while(!proberx()) to_stdout('-'); // wait until first reception
+
+        while((c=Getc()) != -1){ // dump the reception queue to the big queue
             filona[tlona] = c;
-            // se tirar fode (b520 vira 15)
-            //to_stdout('*');
-//            cmips_delay(1);
-            //to_stdout('\0');    
-            // es
             tlona++;
             tlona%=145;
             if(c=='\n'){
@@ -168,11 +158,12 @@ int main(void) { // receive a string through the UART serial interface
                 filona[tlona] = 10;
             }
         }
+
         while(filonx > 0){
             qt = Strlen(filona+hdona);
             valfib = hex2int(qt, (filona+hdona));
-            if(valfib != -1)
-                valfib = buf[valfib];
+            if(valfib != -1)          // if is a valid value (lower than 2c and bigger or equal to 0)
+                valfib = buf[valfib]; // if not valid, UART receives and prints ffffffff
             hdona += qt+1;
             hdona %= 145;
             qt = int2hex(p, valfib);
@@ -180,6 +171,7 @@ int main(void) { // receive a string through the UART serial interface
             do {
                 j++;
                 while(((rxz = proberx())<10) && !(q=Putc(p[j])));
+
                 while((c=Getc()) != -1){
                     filona[tlona] = c;
                     tlona++;
@@ -189,15 +181,17 @@ int main(void) { // receive a string through the UART serial interface
                         filona[tlona] = 10;
                     }
                 }
+
                 if(!q)                 
                     j--;
                 
             } while (p[j] != 0);
+
             filonx--;
             if(!filonx)
                 return state;
         }
-    } while (state);
+    } while (state < 200);
 
     return state;