Hello,
I use a USB-TTL PL2303HX converter for serial console on A20-Olinuxino-LIME-4G, rev. C
The UART RX0 pin is not working.
I have tested the converter RX/TX lines and their leds light up, only on the board TX pin.
Anyone having a simillar issue ?
How exactly have you connected it? How many pins & which?
Did you try looping its Tx to Rx?
John
I just found a thread saying PL2303 gives 5V output on the TX/RX lines.
I hope i didn't kill my board.
Is the USB serial calbe F, from olimex, based on the PL2303HX chip ?
This is the one I have
(http://yupi.bg/pl2303hx.jpg)
Quote from: kaloyan on September 02, 2014, 02:23:41 PM
I just found a thread saying PL2303 gives 5V output on the TX/RX lines.
I hope i didn't kill my board.
If you connected the TX at 5V to the Olimex board with 3.3V input level and not 5V tolerant, then you may well have done damage.
I have measured my serial module, and it works at 3.3V.
Which means my board UART0 port is damaged (my own fault).
Anyone knows how to check what is damaged ?
I have the same problem. My cable does work with other boards wich are at voltage level 3.3V.
Tested 3 different boards of the A20-SOM (Revision B).
Can anyone check this?
BTW: TX works great