Rpi5 spi woes
17 Nov 2023 02:43 - 17 Nov 2023 03:00 #285681
by cornholio
Rpi5 spi woes was created by cornholio
Trying to get a 7i90 talking to RPi-5
Image used 2023-10-10-raspios-bookworm-arm64
Linuxcnc was installed from the debian repo
RT kernel boots and can run latency test fine, everything seems to as it should
member of spi group
but.. running on the RPi-5 ( /dev/spidev0.1 is correct)
Obviously I can't get Linuxcnc to start a know good config.
Downloaded the latest mesaflash from git , built that but no luck.
Went back to my RP-400 that I know works (just to make sure the FPGA ok), and all was good, start a config ok, sees my 7i73, mesaflash works as expected.
spi_bcm2835 loads on both machines when booted.
Any suggestions.....I know this is new hardware and there may not be an answer yet.
Hmmm just noticed something snippet from RP-400 below, "is unable to set bpw32, fallback to bpw8" a factor, not seen on the RPi-5 output
Image used 2023-10-10-raspios-bookworm-arm64
Linuxcnc was installed from the debian repo
RT kernel boots and can run latency test fine, everything seems to as it should
member of spi group
but.. running on the RPi-5 ( /dev/spidev0.1 is correct)
mesaflash --device 7i90 --addr /dev/spidev0.1 --spi --readhmid
Configuration Name: HOSTMOT2
General configuration information:
BoardName :
FPGA Size: 0 KGates
FPGA Pins: 0
Number of IO Ports: 0
Width of one I/O port: 0
Clock Low frequency: 0.0000 MHz
Clock High frequency: 0.0000 MHz
IDROM Type: 2416523085
Instance Stride 0: 0
Instance Stride 1: 0
Register Stride 0: 0
Register Stride 1: 0
Modules in configuration:
Configuration pin-out:
Obviously I can't get Linuxcnc to start a know good config.
Downloaded the latest mesaflash from git , built that but no luck.
Went back to my RP-400 that I know works (just to make sure the FPGA ok), and all was good, start a config ok, sees my 7i73, mesaflash works as expected.
spi_bcm2835 loads on both machines when booted.
Any suggestions.....I know this is new hardware and there may not be an answer yet.
Hmmm just noticed something snippet from RP-400 below, "is unable to set bpw32, fallback to bpw8" a factor, not seen on the RPi-5 output
mesaflash --device 7i90 --addr /dev/spidev0.0 --spi --readhmid
unable to set bpw32, fallback to bpw8
Configuration Name: HOSTMOT2
General configuration information:
BoardName : MESA7I90
FPGA Size: 9 KGates
FPGA Pins: 144
Number of IO Ports: 3
Width of one I/O port: 24
Clock Low frequency: 100.0000 MHz
Clock High frequency: 200.0000 MHz
IDROM Type: 3
Instance Stride 0: 4
Instance Stride 1: 64
Register Stride 0: 256
Register Stride 1: 256
Last edit: 17 Nov 2023 03:00 by cornholio.
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17 Nov 2023 05:51 #285693
by cornholio
Replied by cornholio on topic Rpi5 spi woes
Little update, playing around with the mesaflash source to force 8 bits per word works with mesaflash able to do a successful --readhmid & --sserial.
Now to hm2_rpspi
Need to find out what happening here, a little above my skills.
Now to hm2_rpspi
halrun
halcmd: loadrt hostmot2
Note: Using POSIX realtime
hm2: loading Mesa HostMot2 driver version 0.15
halcmd: loadrt hm2_rpspi
hm2_rpspi: Can't map peripherals
hm2_rpspi: cannot map peripheral memory.
hm2_rpspi: rtapi_app_main: Invalid argument (-22)
<stdin>:2: waitpid failed /usr/bin/rtapi_app hm2_rpspi
<stdin>:2: /usr/bin/rtapi_app exited without becoming ready
<stdin>:2: insmod for hm2_rpspi failed, returned -1
halcmd: Need to find out what happening here, a little above my skills.
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17 Nov 2023 07:27 #285700
by rodw
Replied by rodw on topic Rpi5 spi woes
post in the driver boards setting and PCW may come to the resue.
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17 Nov 2023 07:39 #285701
by cornholio
Replied by cornholio on topic Rpi5 spi woes
I think it maybe related to 32 bit versus 8 bit reads. At least that was the issue with mesaflash.
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