Revision 1:024296d963b5, committed 2013-11-09

Comitter:

avnisha

Date:

Sat Nov 09 04:45:41 2013 +0000

Parent:

0:466ad3f38b6b

Commit message:

ok

Changed in this revision

--- a/main.cpp	Tue Feb 12 17:25:49 2013 +0000
+++ b/main.cpp	Sat Nov 09 04:45:41 2013 +0000
@@ -1,27 +1,45 @@
 #include "mbed.h"
  
-SPI spi(p5, p6, p7); // mosi, miso, sclk
-DigitalOut cs(p8);
+SPI spi(p11, p12, p13); // mosi, miso, sclk
+DigitalOut cs(p14);
+SPISlave device(p5, p6, p7, p8); // mosi, miso, sclk, ssel
+ 
+char    receive = 0;             // returned by slave
+char    send = 0;               // sent by master
+ 
+void slave_init() {
+    device.reply(receive++);
+    return;
+}
  
+
 int main() {
+
+    int     slave_byte;
+
+    // init slave
+    
+    slave_init();
+    
     // Chip must be deselected
+    
     cs = 1;
 
     // Setup the spi for 8 bit data, high steady state clock,
     // second edge capture, with a 1MHz clock rate
+    
     spi.format(8,3);
-    spi.frequency(1000000);
- 
-    // Select the device by seting chip select low
-    cs = 0;
+    spi.frequency(1000000);;
  
-    // Send 0x8f, the command to read the WHOAMI register
-    spi.write(0x8F);
- 
-    // Send a dummy byte to receive the contents of the WHOAMI register
-    int whoami = spi.write(0x00);
-    printf("WHOAMI register = 0x%X\n", whoami);
- 
-    // Deselect the device
-    cs = 1;
-}
\ No newline at end of file
+    while (1) {
+        cs = 0;
+        slave_byte = spi.write(send++);
+        printf("slave byte = 0x%X\r\n", slave_byte);
+        cs = 1;
+        slave_init();               // give slave SPI time slice 
+        wait(1);
+    }
+     
+}
+
+ 
\ No newline at end of file