From 939470df526f4dc50ee2c5f33405bc38fcf90184 Mon Sep 17 00:00:00 2001
From: Jef Driesen <jef@libdivecomputer.org>
Date: Mon, 11 Jan 2021 20:54:53 +0100
Subject: [PATCH] Wait before sending the firmware data

Without the small delay, sending the first frame often fails. Trying to
read the ACK response byte just fails with a timeout, and no data is
received at all. The bootloader is probably not ready to receive data
yet.
---
 src/divesystem_idive.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/divesystem_idive.c b/src/divesystem_idive.c
index 0659d06..b544ecb 100644
--- a/src/divesystem_idive.c
+++ b/src/divesystem_idive.c
@@ -903,6 +903,9 @@ divesystem_idive_device_fwupdate (dc_device_t *abstract, const char *filename)
 		goto error_free;
 	}
 
+	// Wait before sending the firmware data.
+	dc_iostream_sleep (device->iostream, 100);
+
 	// Upload the firmware.
 	unsigned int offset = 0;
 	while (offset + 2 <= size) {