From 1b71e856a4ea9af82671cbaa4594f382f6037412 Mon Sep 17 00:00:00 2001
From: Kevin O'Connor <kevin@koconnor.net>
Date: Wed, 3 Aug 2022 15:15:33 -0400
Subject: [PATCH] deployer: Wait 100ms before overwriting existing bootloader

If the power supply isn't fully stable or the reset line is glitchy
then there may be a few reboots before the mcu becomes stable.  If the
deployer runs during this unstable period, it may erase the existing
bootloader, but not be able to fully write the new bootloader.

Wait a 100ms before erasing the existing bootloader in an effort to
avoid this situation.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
---
 src/deployer.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/deployer.c b/src/deployer.c
index f7a2f72..27872db 100644
--- a/src/deployer.c
+++ b/src/deployer.c
@@ -77,6 +77,10 @@ sched_main(void)
         halt();
     }
 
+    // Wait 100ms to help ensure power supply is stable before
+    // overwriting existing bootloader
+    udelay(100000);
+
     // Write CanBoot to flash
     const uint8_t *p = deployer_canboot_binary, *end = &p[cbsize];
     while (p < end) {