How to access to Str755 on Hitex-Performancestick2

hello,

i play sometimes with hitex stm32 performancestick 2.

the stm32 works very well, but i want to use the str755

also on the stick. it seems that the str755 works at least

as a gateway beetween the stm32 uart 3 and the virtual

com over the ftdi usb (correct me please if this wrong).

if i use the uart 3 on the stm32 i see my sending data on

the usb vcomm side, but on the other direction the input

data are filtered, i think the software on the str755 should

do that.

how can i have jtag access to the str755 part to reprogram

this behaviour ?

best regards