SYSTEM command

[alexfish]

Hi Peter

Latest Fossil beta

SYSTEM("ls -l")

reports

Syntax error could not parse line 1

BR
Alex

[vovchik]

Dear Alex,

Try SYSTEM "ls -l"

That works...

With kind regards,
vovchik

[alexfish]

Hi vovchik

SYSTEM "ls -l"
my dumb: that is in the Docs

suppose a bit fu-zzzzzy at that time in the morning
I was trying to get latest wiringpi working, this was a mind blower: hence also tried the gpio.bin
that did not work, found that Docs give wrong pin names

also SYSTEM can work with () so is one of the odd bits, since


SYSTEM ("ls -l")

works::

Thanks again
+
BR
Alex

For future reference anyone have problems with the wiringpi , I have seen plenty of them as of late :: Re Raspberry (PI4) at

A Piky will see Pi4j

Attachments:

[alexfish]

As regards SYSTEM

wiringpi may be a bit off topic, yes is part of the story

hence to close the story , and also a reminder as to what can happen
if given the wrong info esp, the raspberry pi gpio pins

a bit of code that worked and a indication of what I am connecting to

BR
Alex

The test code + sources related to the above , interesting reading , spot the difference


'https://github.com/WiringPi/WiringPi
'pins see https://pi4j.com/1.2/pins/model-3b-rev1.html
'stepper driver 4988 pins
'                  X               Y               Z
              '0    2   3   | 4   5   6    | 25   26   27 |
              'en   st  dir | en   st  dir |  en   st  dir |
' to ramps1.4  '============================================='

PRAGMA INCLUDE <wiringPi.h>

OPTION PARSE FALSE
PRAGMA OPTIONS -I/usr/include
PRAGMA LDFLAGS -L/usr/lib/ -lwiringPi

wiringPiSetup()

pinMode (26, OUTPUT)
FOR t = 1 TO 100
digitalWrite (26, HIGH)
delay (100)
digitalWrite (26,  LOW)
delay (100)
PRINT t
NEXT


[alexfish]

TESTING GPIO Timings for axis control

gpio is constant 2147....

gpio then real world

real word stepper time milisec to rpmsec lead8



2147483647
timer 2147483647
timer 2147483647
timer 2147483647
timer 2147483647
timer 2147483647
timer 2147483647

real
timer -0.021
timer -0.02
timer -0.02
timer -0.02
timer -0.021
timer -0.02
timer -0.02
timer -0.02
timer -0.021
timer -0.02
timer -0.02
timer -0.021
timer -0.02
timer -0.02


real world result Maximum. 1 Axis Interpolation will be slightly less , in real world curves not really notable
'timepulse stepper step 0.02 =  25rev second lead8mm = 200 mm per second

terminal 500 steps

real 0m10.150s
user 0m0.015s
sys 0m0.077s

ADDED
above = 10 units delay IE the testing code base on 1(min value) :: hence delay(10) on/of here/
the bit of code

wiringPiSetup()
LOCAL time1 TYPE float
pinMode (26, OUTPUT)
FOR t = 1 TO 500
time1 = TIMER
digitalWrite (26, HIGH)
delay (10)
digitalWrite (26,  LOW)
delay (10)
 
PRINT "timer " , (time1 - TIMER)/1000
NEXT
digitalWrite (26,  LOW)

time to connect

End Of Thread

Further updates see (HUG gcode) thread

BR
Alex