Hello Robert, On 10/5/20 12:07 PM, Robert Carnecky (Neopsis) wrote: > Did anybody successfully configured Raspberry CM3/CM3+ mini-UART as > the Barebox console? I found a thread > on this list discussing the issue > (https://www.mail-archive.com/barebox@xxxxxxxxxxxxxxxxxxx/msg35235.html), > unfortunately without any solution. > > What I need: > > * UART0 on pins 32/33 (technology access over rs-485) > * UART1 (miniUART) on pins 14/15 (console) > > My current config.txt boots fine my raspberry kernel (zImage built > using builroot): > > kernel=zImage > enable_uart=1 > dtoverlay=uart0,txd0_pin=32,rxd0_pin=33,pin_func=7 > dtoverlay=uart1,txd1_pin=14,rxd1_pin=15 > > Now I would like to switch to Barebox as a bootloader. I compiled the > barebox image with > > * CONSOLE_ACTIVATE_NONE = Y > * 'stdout-path=&uart1;' in 'arch/arm/dts/bcm2837-rpi-cm3.dts' . I don't have a CM3, but are you sure uart1 is enabled? Try adding to arch/arm/dts/bcm2837-rpi-cm3.dts: &uart1 { pinctrl-names = "default"; pinctrl-0 = <&uart1_gpio14>; status = "okay"; }; If that doesn't help, use CONSOLE_ACTIVATE_ALL and listen on UART0 before the RS-485 transceiver and paste the dmesg and devinfo input you get. Cheers, Ahmad > > and changed my kernel in config.txt > > kernel=barebox.img > > I cannot see any output on pins 14/15 e.g. UART1, no barebox console, > no kernel console. > Any idea what's wrong here? > > Robert > > _______________________________________________ > barebox mailing list > barebox@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/barebox > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
