From e7136c6b413c8464d32cdc4afc28c93ba1f17a3b Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Mon, 8 Oct 2018 19:42:09 -0700
Subject: [PATCH] altos/lpc: Make sure USB pull-up is held low at boot for 'a
 while'

Add a delay loop to make sure the host sees the pull-up low for long
enough.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 src/lpc/ao_usb_lpc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/lpc/ao_usb_lpc.c b/src/lpc/ao_usb_lpc.c
index c50e7528..d26a1437 100644
--- a/src/lpc/ao_usb_lpc.c
+++ b/src/lpc/ao_usb_lpc.c
@@ -1013,7 +1013,11 @@ void
 ao_usb_init(void)
 {
 #if HAS_USB_PULLUP
+	int	i;
 	ao_enable_output(AO_USB_PULLUP_PORT, AO_USB_PULLUP_PIN, AO_USB_PULLUP, 0);
+
+	for (i = 0; i < 40000; i++)
+		ao_arch_nop();
 #endif
 	ao_usb_enable();
 
-- 
2.30.2