From f96a7cbc59dfe9687872891fdd6307d982082824 Mon Sep 17 00:00:00 2001 From: Gregory Nutt Date: Fri, 25 Aug 2017 16:27:55 -0600 Subject: [PATCH] Update README --- configs/arduino-due/README.txt | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/configs/arduino-due/README.txt b/configs/arduino-due/README.txt index a5065b68051..f85dc97b2c2 100644 --- a/configs/arduino-due/README.txt +++ b/configs/arduino-due/README.txt @@ -2,8 +2,15 @@ README ^^^^^^ This README discusses issues unique to NuttX configurations for the - Arduino DUE board featuring the Atmel ATSAM3X8E MCU running at 84 - MHz. + Arduino DUE board featuring the Atmel ATSAM3X8E MCU running at 84 MHz. + + NOTE: If found that newer Arduino Due board differ from the older boards + mine: Mine has the 32.768 slow clock crystal and associated caps installed. + the newer boards do not. This can cause a hang in the SAM startup code + where it waits for the slow crystal input to lock on. + + Options: (1) Solder a 32.768 KHz crystal and associated caps on board or, + (2) disable the function sam_setupsupc() in sam_clockconfig.c Supported Shields -----------------