Lattice notes¶
MachXO2/MachXO3¶
Flash memory¶
.jed file is the default format generated by Lattice Diamond, so nothing special must be done to generates this
file.
File load:
openFPGALoader [-b yourboard] [--flash-sector CFG0] impl1/*.jed
where yourboard may be:
machX02EVNmachX03EVNmachXO3SK
and where --flash-sector CFG0 is needed for the MachXO3D Breakout Board.
.bit may also be used for machXO2
SRAM¶
To generates .bit file Bitstream file must be checked under Exports Files in Lattice Diamond left panel.
File load:
openFPGALoader [-b yourboard] impl1/*.bit
where yourboard may be:
machX02EVNmachX03EVNmachXO3SK
iCE40¶
.bin is the default format generated by nextpnr, so nothing special must be done.
Since most ice40 boards uses the same pinout between FTDI and SPI flash a generic ice40_generic board is provided.
For the specific case of the iCE40HXXK-EVB where no onboard programmer is present, please use this:
FTDI |
iCE40HXXK-EVB |
|---|---|
SI (ADBUS1) |
Pin 8 |
SCK (ADBUS0) |
Pin 9 |
SO (ADBUS2) |
Pin 7 |
CS (ABDUS4) |
Pin 10 |
RST (ADBUS6 |
Pin 6 |
DONE (ADBUS7) |
Pin 5 |
Bin file load:
openFPGALoader -b ice40_generic /somewhere/*.bin
Since it’s a direct access to the flash (SPI) the -b option is required.
ECP5/Crosslink-NX¶
SRAM¶
openFPGALoader [-b yourBoard] [-c yourCable] -m project_name/*.bit
Hint
By default, openFPGALoader loads bitstream in memory, so the -m argument is optional.
SPI Flash¶
BIT:
openFPGALoader [-b yourBoard] [-c yourCable] -f project_name/*.bit # or *.bin
MCS:
To generate .mcs file PROM File must be checked under Exports Files in Lattice Diamond left panel.
openFPGALoader [-b yourBoard] [-c yourCable] project_name/*.mcs