Good day, Dave! USB to serial is standard olimex female serial to USB cable. I've measured the voltage on the pins, it is no more than 4.9V. I have no oscilloscope, so don't know whether I can trust these numbers.
I'll forward the question to the hardware guy though. On Sun, Feb 16, 2014 at 7:58 AM, Dave McLaughlin <davemclaughli...@gmail.com > wrote: > You say it works with a USB to Serial cable? Is that adapter at RS232 > levels or TTL? > > That's important as the GPIO would be at 3.3V which is commonly called TTL > even though most still refer to this as 5V the term is often used to mean > processor voltage levels. > > If your custom board is an RS232 connection and you don't have a level a > convertor on the GPIO this would explain why it does not work. > > -- > You received this message because you are subscribed to the Google Groups > "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to linux-sunxi+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > -- Point of presence: http://aikipooh.ipernity.com -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
