Joseph Boettcher / Mbed 2 deprecated ECE_4180_Lab1_P1_Arm

ARM assembly language to control LEDs

Dependencies:   mbed

Fork of ECE_4180_Lab1_P1_Arm by Zack Braun

Files at this revision

API Documentation at this revision

Revision 1:1d27be3b634d, committed 2016-11-06

Comitter:
jboettcher
Date:
Sun Nov 06 22:36:01 2016 +0000
Parent:
0:94cb0da877bc
Commit message:
complete;

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file
my_asm.s Show annotated file Show diff for this revision Revisions of this file 
diff -r 94cb0da877bc -r 1d27be3b634d main.cpp
--- a/main.cpp	Wed Sep 07 20:54:08 2016 +0000
+++ b/main.cpp	Sun Nov 06 22:36:01 2016 +0000
@@ -18,15 +18,8 @@
         } else {
             value = 0;
         }
-    
-  
-    // loop forever
-    
       //call assembly language function to control LED1
       my_asm(value);
-      //API function to control LED4
-     // myled4 = value;
-      // flip value and wait
      
       wait(0.2);
     }

diff -r 94cb0da877bc -r 1d27be3b634d my_asm.s
--- a/my_asm.s	Wed Sep 07 20:54:08 2016 +0000
+++ b/my_asm.s	Sun Nov 06 22:36:01 2016 +0000
@@ -13,7 +13,7 @@
 ; Load GPIO Port 1 base address in register R1 
     LDR     R1, =0x2009c000 ; 0x2009C020 = GPIO port 1 base address
 ; Move bit mask in register R2 for bit 18 only
-    MOV.W   R2, #(1<<4)   ; 0x040000 = 1<<18 all "0"s with a "1" in bit 18
+    MOV.W   R2, #(1<<4)   ; 0x040000 = 1<<18 all "0"s with a "1" in bit 18 (1<<4)
 ; value passed from C compiler code is in R0 - compare to a "0" 
     CMP     R0, #0          ; value == 0 ?
 ; (If-Then-Else) on next two instructions using equal cond from the zero flag