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Hi all
I am using an Intel Edison, on a very basic breakout board, fixed level shifters to the serial ports. it is fitted with an FTDI chip which is isolated via level shifters. this interface works....
However, I cannot see anything on the second UART, nor can I send anything.....
Assuming an as set-up straight after firmware has been flashed, what is the best way to enable the UART and to monitor input from an external device?
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Hello proficnc
Welcome to the Intel® Embedded Community
We are working on this issue, we will reply with more information as soon as possible.
Best Regards,
Gabriel
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Hi proficnc.
Please try the following code.
on the Edison:
+++++++++++
/* Disable runtime PM on debug console and UART1 */
cd /sys/devices/pci0000:00/0000:00:04.2/power
echo on > control
cd /sys/devices/pci0000:00/0000:00:04.3/power
echo on > control
# enable UARTRX and UARTTX level shifters
echo 248 > /sys/class/gpio/export
echo 249 > /sys/class/gpio/export
echo 214 > /sys/class/gpio/export
echo low > /sys/class/gpio/gpio248/direction
echo high > /sys/class/gpio/gpio249/direction
echo low > /sys/class/gpio/gpio214/direction
Now you will need the special cable (FTDI USB-UART TTL-232R-1V8-2MM)that you have mentioned to plug into J1B1 Header
to the 01 (Rx,Tx)
http://www.ftdichip.com/Products/Cables/USBTTLSerial.htm http://www.ftdichip.com/Products/Cables/USBTTLSerial.htm
[on PC side] minicom –s
And configure to use
115200
[on EDISON side] microcom –s
microcom -s 115200 /dev/ttyMFD2
Please if you make any change to these instructions or if this works let us know and post a confirmation.
Regards.
Gabriel
PD: Thanks to Rama for the feedback
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