Add generic FTDI gpio manipulation pre / post sequence

[LostTime76]

I have a scenario where the JTAG pins go through a digital isolator and the outputs are not always enabled on the output side. I am using the JTAG pins for several purposes, not just FPGA programming.

I have connected a pin that enables the outputs on the FTDI chip. Would it be possible to add an option to set / clear an IO pin before the programming of the FPGA starts? I know that a status indicator was added recently, this should not be too crazy.

FT4232H connection example

• ADBUS0 - FPGA_JTCK
• ADBUS1 - FPGA_TDI
• ADBUS2 - FPGA_JTDO
• ADBUS3 - FPGA_JTMS
• ADBUS5 - JTAG_ENABLE

The option would just be to simply select the ADBUS5 pin (for example) and set HIGH or set LOW before programming starts... like a pre sequence.

Also, I do not know if this is already possible. If so, just point me in the right direction.

[trabucayre]

Hi,
As mentioned here the pins direction and default state are directly provided at cable.hpp level.

But it's true: this approach imply to append the list with a new cable.