1.4 KiB
1.4 KiB
Advanced usage of openFPGALoader
Resetting an FPGA
openFPGALoader [options] -r
Reading the bitstream from STDIN
cat /path/to/bitstream.ext | openFPGALoader --file-type ext [options]
--file-type is required to detect file type
Note: It's possible to load a bitstream through network:
# FPGA side
nc -lp port | openFPGALoader --file-type xxx [option
# Bitstream side
nc -q 0 host port < /path/to/bitstream.ext
Automatic file type detection bypass
Default behavior is to use file extension to determine file parser. To avoid
this mecanism --file-type type must be used.
FT231/FT232 bitbang mode and pins configuration
FT232R and ft231X may be used as JTAG programmer. JTAG communications are emulated in bitbang mode.
To use these devices user needs to provides both the cable and the pin mapping:
openFPGALoader [options] -cft23XXX --pins=TDI:TDO:TCK:TMS /path/to/bitstream.ext
where:
- ft23XXX may be ft232RL or ft231X
- TDI:TDO:TCK:TMS may be the pin ID (0 <= id <= 7) or string value
allowed values are:
| value | ID |
|---|---|
| TXD | 0 |
| RXD | 1 |
| RTS | 2 |
| CTS | 3 |
| DTR | 4 |
| DSR | 5 |
| DCD | 6 |
| RI | 7 |
Writing to an arbitrary address in flash memory
With FPGA using an external SPI flash (xilinx, lattice ECP5/nexus/ice40, anlogic, efinix) option -o allows one to write raw binary file to an arbitrary adress in FLASH.