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Update README

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Gregory Nutt 2017-08-25 16:27:55 -06:00
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configs/arduino-due/README.txt
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@ -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
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