Hello,

I got an ATSAM3U4E-ek board, openocd can read out chip very well, but
when flashing the internal bank it has very low speed:

 wrote 54652 bytes from file
bin/usb-device-massstorage-project-at91sam3u-ek-at91sam3u4-flash.bin
in 84.920578s (0.628 kb/s)

is this the driver in openocd's problem or my hardware's or my openocd
configurations ?

My flash command is like this:

openocd.cfg -d0 -c init -c targets -c "halt" -c "flash write_image
erase bin/usb-device-massstorage-project-at91sam3u-ek-at91sam3u4-flash.bin
0x00080000 bin" -c "reset run" -c shutdown
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