Need some help understanding interaction between 2 objects
Don M
Posts: 1,653
I have 2 obejects- Main_Test and Object2.
In the Main_Test object it runs a loop waiting for a key press from PST.
In Object2 it initializes 4 outputs for led's (Quickstart board) and runs a simple loop flashing 1 led on / off.
What I am trying to do is turn on one of the remaining led's by using a call method from the Main_Test object called Remote_Led. But it doesn't work like I thought it should. I was expecting that when that method was called it would then call the method in Object2 and turn on the led.
Why doesn't this work?
Thanks.
Don
In the Main_Test object it runs a loop waiting for a key press from PST.
CON
_clkmode = xtal1 + pll16x ' Feedback and PLL multiplier
_xinfreq = 5_000_000 ' External oscillator = 5 MHz
MS_001 = 80_000_000 / 1_000
obj
term : "fullduplexserialdp_1"
other_object : "object2"
var
pub main | c
term.start(31, 30, %0000, 115_200) ' start terminal using PST
pause(500) ' pause for PST
term.str(@message1) ' display device name on reset
other_object.start
pause(500)
repeat
c := term.rxcheck
if (c => 0) ' anything in m->s buffer?
case c
"r" , "R":
reboot
"c":
remote_led
pub remote_led
other_object.remote
pub pause(ms) | t
t := cnt
repeat ms
waitcnt(t += MS_001)
dat
message1 byte "Testing for transfer data",0
In Object2 it initializes 4 outputs for led's (Quickstart board) and runs a simple loop flashing 1 led on / off.
MS_001 = 80_000_000 / 1_000
LED4 = 19
LED3 = 18
LED2 = 17
LED1 = 16
obj
var
byte p
long Stack[256], cog
PUB Start
cog := cognew(main,@Stack)+1
pub main
dira[16..19]~~
pause(1000) ' 1 second delay
outa[16..19]~~
pause(1000) ' 1 second delay
outa[16..19]~
repeat
test_loop
pause(1000)
outa[LED1]~
pause(1000)
pub Test_Loop
outa[LED1]~~
pub Remote
outa[LED3]~~
pause(1000)
outa[LED3]~
pub pause(ms) | t
t := cnt
repeat ms
waitcnt(t += MS_001)
dat
What I am trying to do is turn on one of the remaining led's by using a call method from the Main_Test object called Remote_Led. But it doesn't work like I thought it should. I was expecting that when that method was called it would then call the method in Object2 and turn on the led.
Why doesn't this work?
Thanks.
Don
Comments
You have two solutions. 1) In other_object, have a global variable that's set by Remote that main will use to change the LED's state. 2) Have other_object's Start method set DIRA so bits 16..19 are outputs. The actual I/O pins will be the logical or of OUTA in cog #0 with OUTA in cog #1.
It's long, too involved and lame, but it works.
Three objects...
FlagDemo2.spin - the main program (top object?)
QS_Buttons.spin - the button driver
FlagWatch.spin - watches to see what's happening.
QS_Buttons doesn't play with any LEDs. It scans the touchpads and returns a byte with bits set according to the touch pads.
I == pressed, 0 == not.
FlagDemo2 is the main guy. It starts the other two objects in different cogs.
Notice the start calls... it passes the ADDRESS of a place where stuff will be passed back.
Then it watches the Buttons byte to see if button 4 is set (Touch pad 4)
When that happens it sets FLAG to 1
and changes the LEDs that it uses (22 and 17)
FLAG == 0 LED 22 := 1
FLAG == 1 LED 17 := 1
FlagWatch sets LED 3 just to show it's running.
Then it watchs for FLAG ==1 to happen.
When it sees that, it swaps LEDs (15 and 23).
LED 15 ON for flag == 0
LED 23 ON for Flag == 1
So the action is at the extreme ends of the LED string.
There should be two LEDS on at a time (not counting the middle one),
and both on the same end. If not, somebody is messing up.
Like I said, long, involved and way lame, but I learned how it works here.
Maybe it will help?
CON { Flag_Demo.spin } _CLKMODE=XTAL2 _xinfreq = 5_000_000 VAR LONG MS001, Buttons, Flag OBJ button: "QS_Buttons" ' touchpad driver OBJ Fwatch: "Flag_Watch" ' other cog method PUB ButtonDemo | B ' local variables MS001 := CLKFREQ / 1_000 ' define 1 millisec button.start( @Buttons ) ' send address of Buttons Fwatch.start(@flag) Repeat if Buttons & |< 4 ' button 4 pressed? Flag := 1 ' set Flag TurnON(4+16) ' show the button pressed WaitMS(10) TurnOFF(4+16) else Flag := 0 ' else clear Flag If Flag == 1 ' this cog can see Flag directly TurnON(1+16) ' LED 1 ON TurnOFF(6+16) ' LED 6 Off else TurnOFF(1+16) ' LED 1 OFF TurnON (6+16) ' LED 6 ON PUB WaitMS(W) ' wait for W milliseconds W := W*MS001 WaitCNT (W+cnt) PUB TurnON(pin) dira[pin] := 1 outa[pin] := 1 PUB TurnOFF(pin) dira[pin] := 1 outa[pin] := 0CON { Flag_Watch.spin } VAR LONG Stack[ 16 ] ' define my stack LONG FlagA, AcogID PUB start( F ) ' start this in a new cog FlagA := F ' save location of flag variable if ACogID cogstop(ACogID-1) ' no cog available ACogID := cognew(Aproc, @Stack) + 1 PUB Aproc 'main loop - scan the buttons Repeat ' loop forever TurnON(19) ' LED 3 show's I'm alive if byte[FlagA] == 1 'if I see a 1 TurnON(16) ' show this LED 15 TurnOFF(23) else 'if I see a 0 TurnON(23) ' show that LED 23 TurnOFF(16) PUB TurnON(pin) dira[pin] := 1 outa[pin] := 1 PUB TurnOFF(pin) dira[pin] := 1 outa[pin] := 0'CON { QS_ButtonScan.spin } ' { returns buttons packed bitwide is a byte} VAR LONG ButtonAdr, ButtonCog, MS001 LONG Stack[ 16 ] ' define my stack PUB start( BAdr ) ' BAdr = Button Address ButtonAdr := BAdr ' save address of return byte if ButtonCog ' did the new cog start? cogstop(ButtonCog-1) ' OOPS! no cog available ButtonCog := cognew(ButtonScan, @Stack) + 1 MS001 := clkfreq/1000 PUB ButtonScan | B, B1 ' local variables dira [0..7] := 111111 ' all pad pins outputs outa [0..7] := 111111 ' all pad pins high 'main loop - scan the buttons Repeat ' loop forever Repeat B from 0 to 7 ' QS LEDS are pins 0-7 dira [B] := 1 ' make pin an output dira [B] := 0 ' make pin an input WaitMS(4) ' short delay for some decay B1 := ina[B] ' read the pad if B1 == 0 ' 0 here means pressed BYTE[ButtonAdr] |= |< B ' set bit if pressed else BYTE[ButtonAdr] &= !|< B ' clear bit if not PUB WaitMS(W) 'wait for W milliseconds W := W * 1000 'MS001 WaitCNT (W+cnt)The code works (just checked it again) so if something is unclear, read
the code!
Now, I have a question...
I call fwatch.start to start the flag watch method.
But I didn't call the mainpart of the code (Aproc in Flag_Watch.spin).
And yet it works correctly.
Same thing with Button.Start.
Never called the ButtonScan method.
But it runs.
Why is that?
Is there something special aboutthe .start?
PUB start( BAdr ) ' BAdr = Button Address ButtonAdr := BAdr ' save address of return byte if ButtonCog ' did the new cog start? cogstop(ButtonCog-1) ' OOPS! no cog available ButtonCog := cognew([COLOR="red"]ButtonScan[/COLOR], @Stack) + 1 MS001 := clkfreq/1000So there is nothing to worry about.Thank you for kindly pointing out the painfully obvious which I completely missed when I was looking a the code tonight...
I remember now. I knew it couldn't fall though the end of the PUB or PRI block.
But I didn't catch the call inside the .start methods.
(The COGNEW did it - in the library - with a soldering iron... (anybody here old enough to get that?))
And the other one is invoked in its' .start function...
ACogID := cognew(Aproc, @Stack) + 1
A lot of my learning so far has been pretty much cook-book style.
But eventually the LED comes on...