2.1.7. Instantiation of board_cade_id_0 Component – JTAG Cable Autodetect Feature
You can set the ACL_PCIE_JTAG_CABLE or ACL_PCIE_JTAG_DEVICE_INDEX environment variables to disable the auto-detect feature and use values that you define.
Cable autodetect is useful when you have multiple devices connected to a single host.
The memory-mapped device (MMD) uses in-system sources and probes to identify the cable connected to the target board. You must instantiate the board_cade_id_0 register block and connect it to Bar 4 with the correct address map. You must also instantiate board_in_system_sources_probes_0, which is an in-system sources and probe component, and connect it to board_cade_id_0 register.
The MMD must be updated to take in the relevant changes. Add the scripts/find_jtag_cable.tcl script to your custom platform.
When the FPGA is being programmed via the Intel FPGA Download Cable, the MMD invokes quartus_stp to execute the find_jtag_cable.tcl script. The script identifies the cable and index number which is then used to program the FPGA through the quartus_pgm command.
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