> 未分类 > [LinuxCNC/linuxcnc Issue#429] Hm2_rpspi and hm2_rpi drivers fail

[LinuxCNC/linuxcnc Issue#429] Hm2_rpspi and hm2_rpi drivers fail

未分类 bolang 5个月前 (10-15) 36次浏览

Issue #429 | 状态: 已关闭 | 作者: JR1050 | 创建时间: 2018-04-17

标签: hostmot2

Here are the steps I follow to reproduce the issue:

Using the rpspi driver with the latest 2.8 pre produces the following error. Pi3 is connected to 7i90 board via spi. Lcnc invoked from the terminal

hm2_rpspi: SPI0/CE0 Invalid cookie, read: 2ad5e5ff 2a292724 192a2726, expected: 55aacafe 54534f48 32544f4d
hm2_rpspi: SPI0/CE0 MISO input is bit-shifted by one bit. SPI read clock frequency probably too high.
hm2rpspi: rtapiapp_main: No such device (-19)
./hnc112517.hal:24: waitpid failed /usr/bin/rtapiapp hm2rpspi
./hnc112517.hal:24: /usr/bin/rtapi_app exited without becoming ready
./hnc112517.hal:24: insmod for hm2_rpspi failed, returned -1
Shutting down and cleaning up LinuxCNC…
hm2_rpspi: not loaded
:0: exit value: 255
:0: rmmod failed, returned -1
hm2: unloading
:0: unloadrt failed

1. I tried changing the spi clock rates, no effect
2. Tried the hm2_rspi driver and got different errors
3. Tried my old rpspi driver from last year, same errors as the rspi driver

This is what I expected to happen: it to work

This is what happened instead: see above error

It worked properly before this:

Using an older about a year old version of 2.8 and an older rpspi driver
It worked and was running a machine

Information about my hardware and software:

Rpi3 running raspian, rtprempt patch, latest 2.8 pre. Mesa 7i90 board with encoder/ pwm/ ssi bit file svt8 I think . Hm2rpspi was compiled in place with latest source file and header files from GitHub. 2.8 was pulled from buildbot

* I am using this user interface (GUI) (e.g., AXIS, Touchy, gmoccapy, etc): Axis
* I am using this interface hardware vendor and chipset (e.g., parallel port, ethernet port, FPGA card): mesa 7i90 with spi

评论 (7)

#1 – andypugh 于 2018-04-18

Are you using the very latest firmware from Mesa? There was a bug in the LinuxCNC driver that masked a bug in the 7i90 firmware.
We fixed the LinuxCNC bug (affected all cards Smart-Serial cards) but this necessitated a re-release of the Mesa firmware.

#2 – pcw-mesa 于 2018-04-18

I don’t think this is firmware related since the firmware was working before a LinuxCNC update, and the error is quite low level (my guess is either a clock speed or clock polarity change in the driver) The firmware bug that triggered issue 412 (uncovered by the sserial bug fix ) only affects when SPI writes are done

#3 – andypugh 于 2018-04-24

Where did you get your Pi kernel and LinuxCNC version from? I have a Pi and 7i90 so ought to be able to reproduce your hardware.

#4 – JR1050 于 2018-04-25

Andy, thank you for looking into this. My kernel came from here
http://www.frank-durr.de/?p=203, I had tried to do it from scratch , but I had trouble, it was easier to use his. My lcnc came from buildbot, the rpspi driver and header files from git.

#5 – rmu75 于 2018-05-22

just FYI, kernel 4.9.65 with rt preempt patch 56v7 works reasonably well.

Can you show the parameters to to hm2_rpspi? I find that read-frequencies above 30MHz won’t work, this is with ca. 50mm SPI connection and serial termination.

Actual line from working configuration: loadrt hm2rpspi spiclkrate=60000 spiclkraterd=29000 on a somewhat recent linuxcnc 2.8 built on the Pi.

#6 – pcw-mesa 于 2018-07-14

I can verify that 4.9.65 works (thanks rmu for the kernel debs!) with hm2_rpspi and LinuxCNC 2.8
(2.8 built a couple days ago) This is not with a 7I90 but a 7C80 which has a RPI compatible GPIO connector, but the SPI firmware interface is identical to the 7I90.

#7 – rmu75 于 2018-11-12

This weekend i upgraded to

* kernel 4.14.74-rt44-v7 built from https://github.com/raspberrypi/linux/tree/rpi-4.14.y-rt
* linuxcnc master as of 2018-11-10
* latest mesa BIT File (7i90spisvss6_8.bit)
* raspberry pi 3b+

Seems to work flawlessly.

I think this bug can be closed if there is no further input.

原始Issue: https://github.com/LinuxCNC/linuxcnc/issues/429

喜欢 (0)