Thanks for the infos and the patches.
1. Non SPL After disabling SPL in the U-Boot configuration and enabling USART6 in the DTS with the patches you provided, there is still no output on this serial interface after flashing U-Boot v2018.01 (stm32f746-disco_defconfig) with: $ openocd -f board/stm32f7discovery.cfg -c "program images/u-boot.bin 0x08000000" -c "reset run" -c shutdown Serial output is coming on USART6 with U-Boot from https://github.com/EmcraftSystems/u-boot so it is unlikely to be a hardware issue.
2. SPL I am not familiar with this mode on the stm32f746 disco. I have tried copying the u-boot.bin generated with SPL enabled to the "DIS_F746NG" MBED volume exposed by the card and the LED blinks in red and green for a few seconds. Still, no output is coming through the /dev/ttyACM* device. Could you give some hints about the steps to get it running?
Francois
On Tue, Jul 25, 2017 at 3:39 PM, Patrice CHOTARD patrice.chotard@st.com wrote:
Another update you need to do, is to change the default uart in device tree. By default uart1 is used, using the STLink usb port.
To use the UART6 output on arduino UNO connector, applied the attached patch.
Patrice
On 07/25/2017 02:20 PM, Patrice CHOTARD wrote:
Hi Francois
By default, stm32f746-disco is configured in SPL mode, that's what explain you don't get any output in the console
To come back in non SPL mode, you can use the attached patch.
Patrice
On 07/21/2017 10:40 PM, Francois Dugast wrote:
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. 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 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
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