JTAG has been tested and works fine, I managed to upload a ram uboot and
reflash a board. obviously no mikrobus module can be populated. However
it is recommended to use mtk_uartboot for worst case scenario recovery
as described in the wiki
John
On 27.02.25 03:07, Charlemagne Lasse wrote:
Hi,
Did anyone get the JTAG working on the OpenWrt One? It seems to me
that the pins for JTAG are used also on microbus and various SPI
connected chips. See
https://one.openwrt.org/hardware/BPI_OpenWRT_ONE_V10_SCH_20240618-R.pdf
I would therefore expect to not have access to it under OpenWrt
(because of the DTS settings). If I read the schematics correctly, it
is actively disabled even before OpenWrt because the R109 is not
populated on the PCB. md32_ejtag_en is set to 0 (disabled) all the
time.
If this is correctly, OpenWrt One should not have been advertised as
"JTAG for main SOC"
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