From: Tilman Sauerbeck <tilman@code-monkey.de>
Date: Sun, 7 Jul 2019 07:57:33 +0000 (+0200)
Subject: bootloader: Make run() function return a bool.
X-Git-Url: http://git.code-monkey.de/?p=gps-watch.git;a=commitdiff_plain;h=2b618b466f5ba3df4bb97afb732d10469c5da3c0

bootloader: Make run() function return a bool.

The return value indicates if the caller should continue to call
the function. It only returns false once COMMAND_START_APP is seen.

The idea is that after run() returns false, the we can jump to the
application code.
---

diff --git a/src/bootloader/bootloader.rs b/src/bootloader/bootloader.rs
index cf4bca2..311b1a6 100644
--- a/src/bootloader/bootloader.rs
+++ b/src/bootloader/bootloader.rs
@@ -121,7 +121,7 @@ impl Bootloader {
         }
     }
 
-    pub fn run(&mut self) {
+    pub fn run(&mut self) -> bool {
         if self.command_bytes < 4 {
             if let Some(b) = try_read_u8() {
                 self.command >>= 8;
@@ -131,10 +131,14 @@ impl Bootloader {
             }
         }
 
-        if self.command_bytes == 4 {
+        if self.command_bytes != 4 {
+            true
+        } else {
             self.command_bytes = 0;
 
             self.process_command();
+
+            self.command != COMMAND_START_APP
         }
     }