On Wed, Nov 25, 2020 at 5:36 PM Andy Shevchenko <andy.shevche...@gmail.com> wrote: > > On Wed, Nov 25, 2020 at 5:23 PM Simon Glass <s...@chromium.org> wrote: > > On Wed, 25 Nov 2020 at 08:07, Andy Shevchenko <andy.shevche...@gmail.com> > > wrote: > > > On Wed, Nov 25, 2020 at 4:50 PM Simon Glass <s...@chromium.org> wrote: > > > > On Wed, 25 Nov 2020 at 06:26, Andy Shevchenko > > > > <andy.shevche...@gmail.com> wrote: > > > > > I think you should be more worried about the UART! > > > > > > How? There is no UART (there are ports, but all of them are occupied > > > by real devices wired up). The only connector is microB and getting > > > USB to work in a gadget mode seems to me a harder task to achieve. > > > > The board designers should be severely punished. Do you have post codes? > > > > Some boards have an FTDI chip to do the USB/serial conversion but I > > guess your one does not. > > It's not a board. As I stated in the subject line it's a real product > (tablet / phone).
Does this tablet / phone have an MMC slot? For example, on all Allwinner tablets it is technically possible to use MMC pins for UART via a different non-standard pin mux setup and a breakout board: https://linux-sunxi.org/MicroSD_Breakout https://linux-sunxi.org/File:MSI_Primo81_and_MicroSD_breakout.jpg Also are you sure that there are really no UART pads on the PCB to solder some wires if you disassemble your tablet / phone?
