program_hw_cfgmem - 2024.1 English

Vivado Design Suite Tcl Command Reference Guide (UG835)

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2024.1 English

Program Cfgmem object


program_hw_cfgmem [‑svf_file <arg>] [‑force] [‑append] [‑quiet] [‑verbose]


Name Description
[-svf_file] svf file to be generated
[-force] overwrite svf_file if it already exists
[-append] append to svf file
[-quiet] Ignore command errors
[-verbose] Suspend message limits during command execution
[<hw_cfgmem>] list of hardware cfgmems Default: current hardware cfgmem




Erase, blank check, program, and/or verify the specified hw_cfgmem object with the memory configuration file defined in the object's PROGRAM.FILE property. The memory configuration file is created with the write_cfgmem command, and associated with the hw_cfgmem object using the set_property command as shown in the example.

The process whereby the design specific data is loaded or programmed into the AMD FPGA is called configuration. The create_hw_cfgmem command defines a flash memory device used for configuring and booting the FPGA device.

After the hw_cfgmem object is created, and associated with the hw_device, the configuration memory can be programmed with the bitstream and other data from a memory configuration file created with the write_cfgmem command. The hw_cfgmem object is programmed using the program_hw_cfgmem command.

The program_hw_cfgmem command will run a multi-step process to erase the configuration memory device, perform a blank check to validate that the device is empty, program the device with the memory configuration file, and verify the programming on the device. Properties on the hw_cfgmem object determine which steps of the programming process are performed. These properties include:

  • PROGRAM.FILES - Specifies the memory configuration files to use for programming the device. The memory configuration files are created with the write_cfgmem command.
  • PROGRAM.ADDRESS_RANGE - Specifies the address range of the configuration memory device to program. The address range values can be:
    • {use_file} - Use only the address space required by the memory configuration file to erase, blank check, program, and verify.
    • {entire_device} - Erase, blank check, program, and verify the entire device.
  • PROGRAM.ERASE - Erases the contents of the flash memory when true. This is a boolean property with a value of 0 (false) or 1 (true).
  • PROGRAM.BLANK_CHECK - Checks the device to make sure the device is void of data prior to programming. This is a boolean property with a value of 0 (false) or 1 (true).
  • PROGRAM.CFG_PROGRAM - Program the device with the specified PROGRAM.FILE. This is a boolean property with a value of 0 (false) or 1 (true).
  • PROGRAM.VERIFY - Verify the device after programming. This is a boolean property with a value of 0 (false) or 1 (true).

The program_hw_cfgmem command can also generate an SVF file for in-system and remote programming of Xilinx devices. SVF is an industry standard file format that is used to describe JTAG chain operations by describing the information that needs to be shifted into the device chain. SVF files are ASCII files that can be written and modified in any text editor. Many third-party programming utilities can use the SVF file to program Xilinx devices in a JTAG chain.

This command returns a transcript of its process when successful, or returns an error if it fails.


-svf_file <arg> - (Optional) Create an SVF output file for programming SPI and BPI Flash configuration memories. The SVF file can be used by third party tools, and also supports JTAG transaction tracing and improving Bullseye coverage.

Note: If the path is not specified as part of the file name, the file will be written into the current working directory, or the directory from which the tool was launched.

-force - (Optional) Overwrite the specified SVF file if it already exists.

Tip: If -force is specified with -append, the -append option is ignored, and a new SVF file is created overwriting the existing file.

-append - (Optional) Append the SVF output to the specified file rather than overwriting it.

-quiet - (Optional) Execute the command quietly, returning no messages from the command. The command also returns TCL_OK regardless of any errors encountered during execution.
Note: Any errors encountered on the command-line, while launching the command, will be returned. Only errors occurring inside the command will be trapped.
-verbose - (Optional) Temporarily override any message limits and return all messages from this command.
Note: Message limits can be defined with the set_msg_config command.

<hw_cfgmem> - (Required) Specify a hw_cfgmem object to program. The hw_cfgmem must be specified as an object by get_hw_cfgmems or current_hw_cfgmem, rather than simply by name.


The following example creates a hw_cfgmem object associated with the current_hw_device, defines the memory configuration file created from the bitstream with the write_cfgmem command, defines other properties of the programming process, and then programs the hw_cfgmem object:

create_hw_cfgmem -hw_device [current_hw_device] [lindex $cfgParts 0 ]
set cfgMem [current_hw_cfgmem]
set_property PROGRAM.FILE {C:/Data/config_n25q128.mcs} $cfgMem
set_property PROGRAM.ADDRESS_RANGE  {use_file} $cfgMem
set_property PROGRAM.BLANK_CHECK  1 $cfgMem
set_property PROGRAM.ERASE  1 $cfgMem
set_property PROGRAM.CFG_PROGRAM  1 $cfgMem
set_property PROGRAM.VERIFY  1 $cfgMem
program_hw_cfgmem $cfgMem
Note: In this example, the current hw_cfgmem object is assigned to the variable $cfgMem.

The following example programs the current hw_cfgmem object:

program_hw_cfgmem [current_hw_cfgmem]