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

Vikas MANOCHA vikas.manocha at st.com
Fri Jul 22 03:12:45 CEST 2016


Thanks Tom

> On Jul 21, 2016, at 12:39 PM, Tom Rini <trini at konsulko.com> wrote:
> 
>> On Wed, Jul 20, 2016 at 11:59:32PM +0200, Vikas MANOCHA wrote:
>> 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.
> 
> Done, sorry about that.
> 
> -- 
> Tom
> 


More information about the U-Boot mailing list