Trying to get second uart to work

nottledim

I'm trying to get ttyS2 to work.  I've changed script.fex to enable uart2 and commented out the pins
it uses (PA0..3) from gpio.  

[uart2]
uart_used = 1
uart_port = 2
uart_type = 2
uart_tx = portA00<2><1><default><default>
uart_rx = portA01<2><1><default><default>
;uart_rts = portA02<2><1><default><default>
;uart_cts = portA03<2><1><default><default>

The device /dev/ttyS2 is created and proper entries appear in dmesg.

[    0.402171] sw_uart_get_devinfo()1503 - uart0 has no uart_regulator.
[    0.402324] sw_uart_get_devinfo()1503 - uart2 has no uart_regulator.
[    0.402799] uart0: ttyS0 at MMIO 0x1c28000 (irq = 32) is a SUNXI
[    0.402943] sw_uart_pm()890 - uart0 clk is already enable
[    1.370666] uart2: ttyS2 at MMIO 0x1c28800 (irq = 34) is a SUNXI

Programs can attach to device but the problem is no data passes in or out.

Can somebody suggest something I have overlooked?

Thanks

Nottledim

jernej

Search trough script.bin for other usages of same GPIO pins and remove them. Usually you will find it in GPIO section.

nottledim

Thanks.  I did that before I posted.  I checked again but no change.  
I forgot to mention this is an OP Plus.  I think data is on real pins 11 & 13.
13 seems to be input and 11 output as expected.

It all looks good except there's no data
stty shows correct baudrate.

I notice that the port's <mux feature> is set to 2.  I'm not to sure what that means.  Should it be something else?

jernej

nottledim replied at 2016-7-16 22:02
Thanks.  I did that before I posted.  I checked again but no change.  
I forgot to mention this is a ...

Pin mux 2 is correct. If you are sure that you removed others occurences of PA00 and PA01, then I'm clueless.