Direct-Sampling Beam Position Monitor

Gateware/Software for Direct-Sampling Beam Position Monitor

Building

This repository contains both gateware and software for the Direct-Sampling Beam Position Monitor.

Gateware Dependencies

To build the gateware the following dependencies are needed:

• GNU Make
• Xilinx Vivado (2022.1 tested), available here
• Xilinx Vitis (2022.1 tested), available here

Make sure vivado and vitis are in PATH.

Software Dependencies

To build the software the following dependencies are needed:

• aarch64-none toolchain, bundled within Vitis

Building Instructions

With the dependencies in place a simple make should be able to generate both gateware and software, plus the SD boot image .bin.

make

A suggestion in running the make command is to measure the time and redirect stdout/stderr to a file so you can inspect it later:

ARM_TOOLCHAIN_LOCATION=/media/Xilinx/Vivado/2022.1/Vitis/2022.1/gnu/aarch64/lin/aarch64-none
(time make PLATFORM=<PLATFORM_NAME> APP=<APP_NAME> SAMPLES_PER_TURN= <SAMPLES_PER_TURN> VCXO_TYPE=<VCXO_TYPE> CROSS_COMPILE=${ARM_TOOLCHAIN_LOCATION}/bin/aarch64-none-elf- && notify-send 'Compilation SUCCESS' || notify-send 'Compilation ERROR'; date) 2>&1 | tee make_output

So, for example, to generate the DSBPM application for the ZCU208 board, 81 samples per turn and VCXO with center frequency of 160MHz:

ARM_TOOLCHAIN_LOCATION=/media/Xilinx/Vivado/2022.1/Vitis/2022.1/gnu/aarch64/lin/aarch64-none
(time make PLATFORM=zcu208 APP=dsbpm SAMPLES_PER_TURN=81 VCXO_TYPE=160 CROSS_COMPILE=${ARM_TOOLCHAIN_LOCATION}/bin/aarch64-none-elf- && notify-send 'Compilation SUCCESS' || notify-send 'Compilation ERROR'; date) 2>&1 | tee make_output

Deploying

To deploy the gateware and the software we can use a variety of methods. For development, JTAG is being used. Remember to check the DIP switches on development boards and ensure the switches are set to JTAG mode and NOT SD Card mode.

Deploying gateware

The following script can download the gateware via JTAG:

cd gateware/scripts
xsct download_bit.tcl ../syn/<APP>_<PLATFORM>/<APP>_<PLATFORM>_top.bit

Deploying software

The following script can download the software via JTAG:

cd software/scripts
xsct download_elf.tcl ../../gateware/syn/<APP>_<PLATFORM>/psu_init.tcl ../app/<APP>/<APP>_<PLATFORM>.elf

Updates

The following system parameters can be updated via TFTP:

• RF demodulation table
• Pilot demodulation Tone table
• Pilot Tone generation table
• System parameters
• Gateware + Software boot file (BOOT.bin)

Update System parameters table

An example of the parameters used can be found at: software/app/<APP>/scripts/sysParms.csv

tftp -v -m binary <system IP> -c put sysParms.csv sysParms.csv

Generating demodulation/generation tables

The tables are generated by a python script createDemodGenTables.py located at : software/scripts

To execute that script do:

cd software/scripts
python3 createDemodGenTables.py

Update the RF demodulation table

An example of the RF table can be found at: software/scripts/rfTableSR_81_328_bin_20_conjugate.csv

tftp -v -m binary <system IP> -c put <RF TABLE>.csv rfTable.csv

Update Pilot tone demodulation table

An example of the PT table can be found at: software/scripts/ptTableSR_81_328_L7_19_H11_19_bin_20_conjugate.csv

tftp -v -m binary <system IP> -c put <PT TABLE>.csv ptTable.csv

Update Pilot tone generation table

An example of the PT generation table can be found at: software/scripts/ptGen_81_7_low_11_high_19.csv

tftp -v -m binary <system IP> -c put <PTGEN TABLE>.csv ptGen.csv

Update system image file (BOOT.bin):

tftp -v -m binary <system IP> -c put BOOT.bin BOOT.bin

When copying BOOT.bin, the user needs to reboot the system via a power cycle or via the console boot command.

Another option to upgrade the image is to use the programFlash.sh script located at: software/scripts. The script will automatically readback the image file from the system and peform a byte-to-byte comparison to detect possible transmission errors.

cd software/scripts
sh ./programFlash.sh <system IP> [BOOT.bin filename]

If BOOT.bin filename is missing the current path is assumed.