[U-Boot] [U-Boot, 3/3] stm32: Change USART port to USART6 for stm32f746 discovery board

Vikas MANOCHA vikas.manocha at st.com
Wed Jul 20 23:59:32 CEST 2016


Hi Tom,

> -----Original Message-----
> From: U-Boot [mailto:u-boot-bounces at lists.denx.de] On Behalf Of Tom Rini
> Sent: Saturday, July 16, 2016 6:51 AM
> To: tnishinaga.dev at gmail.com
> Cc: u-boot at lists.denx.de; gregkh at linuxfoundation.org
> Subject: Re: [U-Boot] [U-Boot, 3/3] stm32: Change USART port to USART6 for
> stm32f746 discovery board
> 
> On Fri, Jul 08, 2016 at 01:02:26AM +0900, tnishinaga.dev at gmail.com wrote:
> 
> > From: Toshifumi NISHINAGA <tnishinaga.dev at gmail.com>
> >
> > This change is to remove a halt at about 200KiB while sending a
> > large(1MiB) binary to a micro controller using USART1.
> > USART1 is connected to a PC via an on-board ST-Link debugger that also
> > functions as a USB-Serial converter.
> > However, it seems to loss some data occasionally.
> > So I changed the serial port to USART6 and connected it to the PC
> > using an FTDI USB-Serial cable, therefore the transmission was
> > successfully completed.
> >
> > Signed-off-by: Toshifumi NISHINAGA <tnishinaga.dev at gmail.com>
> 
> Applied to u-boot/master, thanks!

There is no serial/usb connector on discovery board to use USART6 signals.
With this patch, it is not possible to get discovery console without additional circuit. Please revert this patch.
Also I did a quick check on transferring 2.6MB binary using usart1 without any issue.

Hi Toshifumi,
Please keep all involved developers in the "To" of the patch e-mails (checkout scripts/get_maintainer.pl).

Cheers,
Vikas

> 
> --
> Tom


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