update readme

Author: viswajith-g

examples/tests/app_loader/README.md

@@ -1,25 +1,31 @@
 # Dynamic App Loader (Helper App)
 =================================
 
-This app waits upon the user to press a button on the device.
+This app waits upon the user to press one of two buttons on the device (if supported).
+
+When Button 1 (Default user button on boards) is pressed, the app tried to load in the 
+`blink` app.
+
+When Button 2 is pressed, the app tries to load in the `adc` app.
+
 There are three stages to this:
 
 1. Setup Phase
 2. Flash Phase
 3. Load Phase
 
 #### Setup Phase
-During the setup phase, the application passes the size of the new app `(blink)`'s 
+During the setup phase, the application passes the size of the new app `(blink)/(adc)`'s 
 binary to the app_loader capsule. 
 
 The capsule returns with either a success or failure. 
 
-On success, the app requests the app_loader capsule to flash the `blink` app.
+On success, the app requests the app_loader capsule to flash the `blink/adc` app.
 
 On Failure, the app exits logs the reason for failure and exits.
 
 #### Flash Phase
-The app sends the binary of the `blink` app 512 bytes (this is the size of the shared 
+The app sends the binary of the `blink/adc` app 512 bytes (this is the size of the shared 
 buffer between the app and the capsule) at a time along with the offset.
 
 The capsule checks that these values do not violate the bounds dictated by the kernel 
@@ -30,12 +36,12 @@ violations do not take place, and flashes the app.
 
 The capsule then returns with either a success or failure. 
 
-On success, the app requests the app_loader capsule to load the `blink` app.
+On success, the app requests the app_loader capsule to load the `blink/adc` app.
 
 On Failure, the app exits logs the reason for failure and exits.
 
 #### Load Phase
 The app requests the capsule to load the new app. There are only two outcomes: 
 
-1. The `blink` app is loaded successfully and functions without requiring a restart.
+1. The `blink/adc` app is loaded successfully and functions without requiring a restart.
 2. The load process failed somewhere, and the app is erased.

examples/tests/app_loader/main.c

@@ -117,7 +117,7 @@ static void button_callback(int                            btn_num,
         tock_exit(ret); // we failed, so we exit the program.
       } else {
         // yielding for padding write
-        printf("[Log] yielding for padding write.\n");
+        printf("[Log] yielding for setup done.\n");
         yield_for(&setup_done);   // wait until the padding app write is done before you send your app, or it will fail during write
         setup_done = false;
         // padding success