Hi Francois,
> -----Original Message-----
> From: U-Boot [mailto:u-boot-boun...@lists.denx.de] On Behalf Of Francois
> Dugast
> Sent: Friday, July 21, 2017 1:41 PM
> To: u-boot@lists.denx.de
> Subject: [U-Boot] STM32F746 Discovery - No serial output?
>
> Hi,
>
> I am trying to run the master on a STM32F746 Discovery board [1] by using
> stm32f746-disco_defconfig. It was built with gcc-arm-none-
> eabi-5_4-2016q3 [2] and flashed with OpenOCD [3]. A USB-serial adapter is
> connected to USART6_RX and USART6_TX (pins D0 and D1 of
> the Arduino connector) and configured for 115200 8N1. No output coming out
> through the serial interface.
There is no need of USB-serial adaptor with this board.
USART1 can be used using stlink usb port which is being configured by u-boot
master.
Here is the usart1 dts pin config (check out arch/arm/dts/stm32f746-disco.dts):
usart1_pins_a: usart1@0 {
pins1 {
pinmux = <STM32F746_PA9_FUNC_USART1_TX>;
bias-disable;
drive-push-pull;
slew-rate = <2>;
};
pins2 {
pinmux = <STM32F746_PB7_FUNC_USART1_RX>;
bias-disable;
};
};
Cheers,
Vikas
>It is unlikely to be a
> hardware issue as output is coming out normally this way when using the
> U-Boot repository from Emcraft.
>
> I do not know what I am doing wrong, can you help me out?
>
> Cheers,
> Francois
>
> [1] http://www.st.com/en/evaluation-tools/32f746gdiscovery.html
> [2] https://launchpad.net/gcc-arm-embedded
> [3] http://openocd.org
> [4] https://github.com/EmcraftSystems/u-boot
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