New project, litehm2: a hostmot2 port to linsn rv901t

Is there any massively insurmountable reason that this project wouldn't work with a Trion T20 FPGA? I did notice that SRAM was mentioned in a previous post, does this require an external SRAM chip or does it use internal FPGA resources?

It should be possible since the HM2 source that supports the T20
is available. I would expect that the on-chip RAM is sufficient

I did notice that in litehm2.py there are imports for "M12L64322a" and "GENSDRPHY", though they do not appear to be used anywhere. I just wanted to confirm that they aren't required for functionality. 

How do I use two 901T boards connected to the switch at the same time?
In addition to setting the IP address of the card 10.10.10.10 and 10.10.10.11 , how does the HAL know that it is the only IO pin

You load the driver with multiple ip addresses specified
The hal pins/parameters will have different board numbers.

Its also important with multiple cards to use the read-request function
so that the second card does not have wait for the first card to respond
before its read data request is sent.

Spacehitchhiker42 wrote:

I did notice that in litehm2.py there are imports for "M12L64322a" and "GENSDRPHY", though they do not appear to be used anywhere. I just wanted to confirm that they aren't required for functionality. 
 
Sorry for the late reply. Yes, the SDRAM is not used, only internal resources (BRAM).

xu wrote:

gentlemen . bit file still cannot be generated
 

You should carefully read a little instruction.

here

Help me please.
It seems that I’ve done everything and the bit files change when uploaded, but for some reason I can’t start Linux sts. What am I doing wrong?



LINUXCNC - 2.9.2
Machine configuration directory is '/home/dzik/linuxcnc/configs/EMCO'
Machine configuration file is 'EMCO.ini'
Starting LinuxCNC...
linuxcnc TPMOD=tpmod HOMEMOD=homemod EMCMOT=motmod
Note: Using POSIX realtime
Found file(REL): ./EMCO.hal
hm2: loading Mesa HostMot2 driver version 0.15
hm2_eth: loading Mesa AnyIO HostMot2 ethernet driver version 0.2
hm2_eth: 10.10.10.10: INFO: Hardware address (MAC): 4f:e7:34:84:64:c6
hm2_eth: Unrecognized ethernet board found: litehm2 -- port names will be wrong
hm2_eth: discovered litehm2
hm2/hm2_lite.0: Low Level init 0.15
board fails HM2 registration
hm2_eth: in hm2_eth_reset
hm2_eth: rtapi_app_main: Resource temporarily unavailable (-11)
./EMCO.hal:9: waitpid failed /usr/bin/rtapi_app hm2_eth
./EMCO.hal:9: /usr/bin/rtapi_app exited without becoming ready
./EMCO.hal:9: insmod for hm2_eth failed, returned -1
Shutting down and cleaning up LinuxCNC...
Running HAL shutdown script
hm2: unloading
Note: Using POSIX realtime
LinuxCNC terminated with an error. You can find more information in the log:
/home/dzik/linuxcnc_debug.txt
and
/home/dzik/linuxcnc_print.txt
as well as in the output of the shell command 'dmesg' and in the terminal

"board fails HM2 registration"

indicates an inconsistency in the bitfile

what does

mesaflash --device ethernet --addr 10.10.10.10 --readhmid

report?
 

Did you read the section regarding patching the linuxcnc driver ? Because of the 1G bit network interface on The colorlight card.
It may be worth updating Linuxcnc so that you are running a version that has the patch included.
That is if you haven’t already done so.