Revision 2:24e22b31819c, committed 2015-09-25

Comitter:

leonardoaraujosantos

Date:

Fri Sep 25 15:06:28 2015 +0000

Parent:

1:f05471667f60

Commit message:

Changing frequency

Changed in this revision

--- a/main.cpp	Thu Sep 24 07:07:28 2015 +0000
+++ b/main.cpp	Fri Sep 25 15:06:28 2015 +0000
@@ -1,6 +1,9 @@
 #include "mbed.h"
-/**/
-// https://developer.mbed.org/media/uploads/robt/mbed_course_notes_-_serial_spi.pdf
+/*
+    SPI Master used to test the FPGA slave
+    https://developer.mbed.org/media/uploads/robt/mbed_course_notes_-_serial_spi.pdf
+*/
+
 Serial serialIO(SERIAL_TX, SERIAL_RX);
 int main() {
     
@@ -13,11 +16,16 @@
     SPI spiMaster(PA_7, PA_6, PA_5); // mosi, miso, sclk
     DigitalOut chipSelect(PB_6);
     spiMaster.format(8,0);    
-    spiMaster.frequency(5000000);
+    int frequency;
+    serialIO.printf("Choose SPI freq:\r\n");
+    serialIO.scanf("%d",&frequency);
+    serialIO.printf("Setting frequency: %d\r\n",frequency);
+    spiMaster.frequency(frequency); //5000000
     chipSelect = 1;    
     int mode = 0;
     int byteToSend = 0;
     int countPackages = 3;
+    int foreverMode = 0;
                 
     while(1) {        
         if ((!byteToSend) || (countPackages == 0))
@@ -27,16 +35,30 @@
             spiMaster.format(8,mode);            
             serialIO.printf("Type the byte value to send, then press ENTER\r\n");
             serialIO.scanf("%d",&byteToSend);        
-            serialIO.printf("Number of times to send, then press ENTER\r\n");
-            serialIO.scanf("%d",&countPackages);                    
-            serialIO.printf("Sending %d packages on mode %d\r\n",countPackages,mode);
+            serialIO.printf("Number of times to send, then press ENTER (-1) is forever\r\n");
+            serialIO.scanf("%d",&countPackages);    
+            if (countPackages < 0)     
+            {    
+                foreverMode = 1;
+                serialIO.printf("Sending %d packages on mode %d with freq: %d (FOREVER)\r\n",countPackages,mode,frequency);
+            }
+            else                
+                serialIO.printf("Sending %d packages on mode %d with freq: %d\r\n",countPackages,mode,frequency);
+                                
         }
         chipSelect = 0;        
         int resp = spiMaster.write(byteToSend);                
-        chipSelect = 1;
-        serialIO.printf("Sending data<%d> received<%d> %d times\r\n",byteToSend, resp, countPackages);
+        chipSelect = 1;        
         wait_us(2);
-        byteToSend++;
+        if (!foreverMode)
+        {
+            serialIO.printf("Sending data<%d> received<%d> %d times\r\n",byteToSend, resp, countPackages);
+            byteToSend++;
+        } 
+        else
+        {
+            serialIO.printf("Sending data<%d> received<%d> %d times at freq:%d\r\n",byteToSend, resp, countPackages,frequency);
+        }
         countPackages--;        
     }
 }