Revision 3:03e0b3710bf0, committed 2021-02-01

Comitter:

glanier9

Date:

Mon Feb 01 20:04:37 2021 +0000

Parent:

2:934a0500abde

Commit message:

final

Changed in this revision

--- a/main.cpp	Fri Jan 28 02:04:05 2011 +0000
+++ b/main.cpp	Mon Feb 01 20:04:37 2021 +0000
@@ -50,17 +50,26 @@
     led1=0;
 //  Start Loopback test sending out and reading back values
 //  loopback test uses A0 and B0 pins - so use a wire to jumper those two pins on MCP23S17 together
+    int sw = 0;
     while (1) {
-        // write 0xAA to MCP23S17 Port A
-        chip.write(PORT_A, 0xAA);
-        wait(.5);
-        // read back value from MCP23S17 Port B and display B0 on mbed led1
-        led1 = chip.read(PORT_B)& 0x01;
-        // write 0x55 to MCP23S17 Port A
-        chip.write(PORT_A, 0x55);
-        wait(.5);
-        // read back value from MCP23S17 Port B and display B0 on mbed led1
-        led1 = chip.read(PORT_B)& 0x01;
-        // led1 should blink slowly when it is all working
+//        // write 0xAA to MCP23S17 Port A
+//       chip.write(PORT_A, 0xAA);
+//        wait(.5);
+//        // read back value from MCP23S17 Port B and display B0 on mbed led1
+//        led1 = chip.read(PORT_B)& 0x01;
+//        // write 0x55 to MCP23S17 Port A
+//        chip.write(PORT_A, 0x55);
+//        wait(.5);
+//        // read back value from MCP23S17 Port B and display B0 on mbed led1
+//        led1 = chip.read(PORT_B)& 0x01;
+//        // led1 should blink slowly when it is all working
+        
+        // Read from B
+        sw = chip.read(PORT_B)& 0x01;
+        
+        chip.write(PORT_A, sw);
+        
+        
+
     }
 }