From 23dd19757aadbb64112b882cd4ee2082d04791ee Mon Sep 17 00:00:00 2001
From: Dan Halbert <halbert@halwitz.org>
Date: Tue, 7 Nov 2017 21:05:49 -0500
Subject: [PATCH] Wait 2 secs before creating new filesystem in case power is
 jittery

---
 atmel-samd/main.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/atmel-samd/main.c b/atmel-samd/main.c
index 091dfa447f..0013f3e207 100644
--- a/atmel-samd/main.c
+++ b/atmel-samd/main.c
@@ -122,6 +122,11 @@ void init_flash_fs(bool create_allowed) {
     if (res == FR_NO_FILESYSTEM && create_allowed) {
         // no filesystem so create a fresh one
 
+        // Wait two seconds before creating. Jittery power might
+        // fail before we're ready. This can happen if someone
+        // is bobbling a bit when plugging in a battery.
+        mp_hal_delay_ms(2000);
+
         uint8_t working_buf[_MAX_SS];
         res = f_mkfs(&vfs_fat->fatfs, FM_FAT, 0, working_buf, sizeof(working_buf));
         // Flush the new file system to make sure its repaired immediately.