From cb46290e4d17d4cfc79d7c6feb24b6489a6331f3 Mon Sep 17 00:00:00 2001
From: Karol Harasim <karol.harasim@gmail.com>
Date: Tue, 19 May 2020 12:47:02 +0200
Subject: [PATCH] Add missing watchdog prescalers.

---
 src/watchdog.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/watchdog.rs b/src/watchdog.rs
index f8b7f012..f1bf3888 100644
--- a/src/watchdog.rs
+++ b/src/watchdog.rs
@@ -12,7 +12,7 @@ pub struct IndependentWatchdog {
 }
 
 const LSI_KHZ: u32 = 40;
-const MAX_PR: u8 = 4;
+const MAX_PR: u8 = 8;
 const MAX_RL: u16 = 0xFFF;
 const KR_ACCESS: u16 = 0x5555;
 const KR_RELOAD: u16 = 0xAAAA;
@@ -69,6 +69,9 @@ impl IndependentWatchdog {
             0b010 => 16,
             0b011 => 32,
             0b100 => 64,
+            0b101 => 128,
+            0b110 => 256,
+            0b111 => 256,
             _ => panic!("Invalid IWDG prescaler divider"),
         };
         (u32::from(rl) + 1) * divider / LSI_KHZ