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] impl1/*.jed

where yourboard may be:

• machX02EVN

• machXO3SK

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:

• machX02EVN

• machXO3SK

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