[openocd:tickets] Re: #429 How to Select Daisy Chain Chip Devices

[KooLee]

**FPGA info for Vivado** 
~~~
Name    Fpag_0_Value    Fpag_1_Value
REGISTER.IR     010101  110101
REGISTER.IR.BIT0_ALWAYS_ONE     1       1
REGISTER.IR.BIT1_ALWAYS_ZERO    0       0
REGISTER.IR.BIT2_ISC_DONE       1       1
REGISTER.IR.BIT3_ISC_ENABLED    0       0
REGISTER.IR.BIT4_INIT_COMPLETE  1       1
~~~


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**[tickets:#429] How to Select Daisy Chain Chip Devices**

**Status:** new
**Milestone:** 0.10.0
**Labels:** FTDI USB FPGA Daisy Chain 
**Created:** Thu Apr 11, 2024 06:38 AM UTC by KooLee
**Last Updated:** Fri Apr 12, 2024 01:51 AM UTC
**Owner:** nobody


I'm having problems programming FPGAs with FT2232H+OpenOCD, I don't know how to 
solve it, I hope enthusiastic people in the community can help me out.

According to Xilinx UG470 manual, FPGA supports JTAG daisy chaining.
![](https://img2.imgtp.com/2024/04/11/FWale1Ie.png)

Xilinx Vivado Hardware Managers
![](https://img2.imgtp.com/2024/04/11/HCbVfMmx.png)

Please tell me how to select the specified FPGA device in openocd.

The programmer device I am using is FT2232H.
![](https://img2.imgtp.com/2024/04/11/HHP6qaRz.png)
ft2232h.cfg
~~~
interface ftdi
ftdi_vid_pid 0x0403 0x6011
ftdi_channel 0
ftdi_layout_init 0x0098 0x008b
reset_config none

source [find cpld/xilinx-xc7.cfg]
source [find cpld/jtagspi.cfg]
adapter_khz 10000

proc fpga_program {} {
        global _CHIPNAME
        xc7_program $_CHIPNAME.tap
}

init
jtagspi_init 0 bscan_spi_xc7a50t.bit
jtagspi_program bin.bin 0x0
fpga_program
shutdown
~~~


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