Re: Why won't the LED flash?

[andreas]

Hi Josh

Cool you figured it out! 
When you have an (if) without any else statements, you could use (when) instead.

Regards
- beneroth

- Original Message -
From: Josh [mailto:k1llfre...@hotmail.co.uk]
To: picolisp@software-lab.de
Sent: Mon, 21 Dec 2015 00:26:53 +
Subject: Re: Why won't the LED flash?

Okay so I feel like an idiot for not figuring this out earlier, but I'll 
put it down to not writing picolisp before. Anyways, I figured out what 
is wrong, sbcl if statement works like so:

  (if test-form then-form else-form)

And the Picolisp works the same, and the easiest way to do multiple 
things in the "then-form" is with progn on SBCL, or prog on Picolisp :/ 
so the correct code to get it to blink is:

# A simple program which demonstrates
# the usage of user-buttons.
  
# declare pins
(setq led 'PB_29 button 'PX_16)

# a simple delay function
(de delay (t)
(tmr-delay 0 t) )

# make sure the LED starts in
# the "off" position and enable
# input/output pins
(de init-pins ()
(pio-pin-sethigh led)
(pio-pin-setdir *pio-output* led)
(pio-pin-setdir *pio-input* button) )

# And now, the main loop
(de prog-loop ()
(init-pins)
(loop
   (if (= 0 (pio-pin-getval button))
(prog (pio-pin-setlow led)
   (delay 10)
   (pio-pin-sethigh led)
   (delay 10) ) ) ) )

(prog-loop)


*drops mic*
anyways, I got it working using that exact code, I've edited the wiki book.
*picks up mic and drops it again*
Thanks :P


On 20/12/15 13:48, J B wrote:
> No circuit just the plain old Mizar B. The Example from the hempl wiki 
> book is flashing PB_29. I'm Ubuntu to  connect with terminal.
>
> Sent from my iPhone
>
> On Dec 20, 2015, at 12:12 PM, pd <eukel...@gmail.com 
> <mailto:eukel...@gmail.com>> wrote:
>
>> sorry if you already said this but what platform are you using? also 
>> a schematic of your circuit would be interesting even being so simple
>>
>> On Sun, Dec 20, 2015 at 3:18 AM, Josh <k1llfre...@hotmail.co.uk 
>> <mailto:k1llfre...@hotmail.co.uk>> wrote:
>>
>> Thought it might be a firmware problem or something, so I just
>> re-flashed the firmware but it's still happening, just
>> eliminating possibilities. Also the second of my last emails was
>> the correct one, I canceled the previous but it sent anyways.
>> Thanks.
>>
>>
>> On 19/12/15 12:50, Josh wrote:
>>> I have put the main code onto the sd card and I use the shell to
>>> call the function prog-loop. The light just stays on. I've had
>>> this problem before with the example blink program, if I change
>>> any of it to make it shorter by using shorter function names
>>> like (de low () (pio-pin-setlow 'PB_29)) it doesn't work, but it
>>> does when it's just (pio-pijn-setlow 'PB_29). I don't really
>>> know what's going on, but it's starting to get irritating.
>>> On 19/12/15 03:45, Raman Gopalan wrote:
>>>>
>>>> Dear Josh, greetings!
>>>>
>>>> Firstly, great to know you're playing with your board! Perfect!
>>>>
>>>> > Why does this small amount of code not make the onboard LED
>>>> flash?
>>>>
>>>> I think you're not providing enough delay for you to see the
>>>> off state
>>>> of the LED. Why don't you try this? I've just inserted an
>>>> additional
>>>> delay
>>>>
>>>> (pio-pin-setdir *pio-output* 'PB_29)
>>>> (pio-pin-sethigh 'PB_29)
>>>>
>>>> (loop
>>>>(pio-pin-setlow 'PB_29)
>>>>(tmr-delay 0 10)
>>>>(pio-pin-sethigh 'PB_29)
>>>>(tmr-delay 0 10) )
>>>>
>>>> > Any ideas? Also this example on the hempl wiki book:
>>>>
>>>> This example doesn't blink the on-board LED. It just reads the
>>>> status
>>>> of an input pin (SW-1 I think; the one near the voltage
>>>> regulator) and
>>>> turns the blue LED on when this input switch is pressed.
>>>>
>>>> > # And now, the main loop
>>>> > (de prog-loop ()
>>>> >(init-pins)
>>>> >(loop
>>>> >   (if (= 0 (pio-pin-getval button))
>>>> >  (pio-pin-setlow led)
>>>> >  (delay 10)
>>>> >  (pio-pin-sethigh led)
>>>> >  (delay 10) ) ) )
>>>>
>&g

Re: Why won't the LED flash?

[Josh]

Okay so I feel like an idiot for not figuring this out earlier, but I'll 
put it down to not writing picolisp before. Anyways, I figured out what 
is wrong, sbcl if statement works like so:


 (if test-form then-form else-form)

And the Picolisp works the same, and the easiest way to do multiple 
things in the "then-form" is with progn on SBCL, or prog on Picolisp :/ 
so the correct code to get it to blink is:


# A simple program which demonstrates
# the usage of user-buttons.
 
# declare pins

(setq led 'PB_29 button 'PX_16)

# a simple delay function
(de delay (t)
   (tmr-delay 0 t) )

# make sure the LED starts in
# the "off" position and enable
# input/output pins
(de init-pins ()
   (pio-pin-sethigh led)
   (pio-pin-setdir *pio-output* led)
   (pio-pin-setdir *pio-input* button) )

# And now, the main loop
(de prog-loop ()
   (init-pins)
   (loop
  (if (= 0 (pio-pin-getval button))
(prog (pio-pin-setlow led)
  (delay 10)
  (pio-pin-sethigh led)
  (delay 10) ) ) ) )

(prog-loop)


*drops mic*
anyways, I got it working using that exact code, I've edited the wiki book.
*picks up mic and drops it again*
Thanks :P


On 20/12/15 13:48, J B wrote:
No circuit just the plain old Mizar B. The Example from the hempl wiki 
book is flashing PB_29. I'm Ubuntu to  connect with terminal.


Sent from my iPhone

On Dec 20, 2015, at 12:12 PM, pd > wrote:


sorry if you already said this but what platform are you using? also 
a schematic of your circuit would be interesting even being so simple


On Sun, Dec 20, 2015 at 3:18 AM, Josh > wrote:


Thought it might be a firmware problem or something, so I just
re-flashed the firmware but it's still happening, just
eliminating possibilities. Also the second of my last emails was
the correct one, I canceled the previous but it sent anyways.
Thanks.


On 19/12/15 12:50, Josh wrote:

I have put the main code onto the sd card and I use the shell to
call the function prog-loop. The light just stays on. I've had
this problem before with the example blink program, if I change
any of it to make it shorter by using shorter function names
like (de low () (pio-pin-setlow 'PB_29)) it doesn't work, but it
does when it's just (pio-pijn-setlow 'PB_29). I don't really
know what's going on, but it's starting to get irritating.
On 19/12/15 03:45, Raman Gopalan wrote:


Dear Josh, greetings!

Firstly, great to know you're playing with your board! Perfect!

> Why does this small amount of code not make the onboard LED
flash?

I think you're not providing enough delay for you to see the
off state
of the LED. Why don't you try this? I've just inserted an
additional
delay.

(pio-pin-setdir *pio-output* 'PB_29)
(pio-pin-sethigh 'PB_29)

(loop
   (pio-pin-setlow 'PB_29)
   (tmr-delay 0 10)
   (pio-pin-sethigh 'PB_29)
   (tmr-delay 0 10) )

> Any ideas? Also this example on the hempl wiki book:

This example doesn't blink the on-board LED. It just reads the
status
of an input pin (SW-1 I think; the one near the voltage
regulator) and
turns the blue LED on when this input switch is pressed.

> # And now, the main loop
> (de prog-loop ()
>(init-pins)
>(loop
>   (if (= 0 (pio-pin-getval button))
>  (pio-pin-setlow led)
>  (delay 10)
>  (pio-pin-sethigh led)
>  (delay 10) ) ) )

Please copy the example on your micro-SD card and point picolisp in
the direction of this file. If this doesn't happen, something
strange
is happening. We can then debug. But I'm almost certain it'll
work :)

Hempl# picolisp /mmc/user-button.l

R

P.S. You may also use the internal transient symbol
`*tmr-sys-timer*'
in the function tmr-delay. I think it uses a hardware PWM
channel to
generate the time (can't remember which; I'll have to see the
sources
again). That makes the timing accurate.


On 18 December 2015 at 22:08, Josh > wrote:

Why does this small amount of code not make the onboard LED
flash?
(pio-pin-setdir *pio-output* 'PB_29)
(pio-pin-sethigh 'PB_29)
(loop (pio-pin-setlow 'PB_29)
 (tmr-delay 0 10)
 (pio-pin-sethigh 'PB_29))
All that happens in the blue LED turns on and stays on,
even though the code clearly says for it to go from high to
low repeatedly. Any ideas? Also this example on the hempl
wiki book:

# A simple program which demonstrates
# the usage of user-buttons.
 # declare pins
(setq led 'PB_29 button 'PX_16)

# a simple delay function

Re: Why won't the LED flash?

[pd]

sorry if you already said this but what platform are you using? also a
schematic of your circuit would be interesting even being so simple

On Sun, Dec 20, 2015 at 3:18 AM, Josh  wrote:

> Thought it might be a firmware problem or something, so I just re-flashed
> the firmware but it's still happening, just eliminating possibilities. Also
> the second of my last emails was the correct one, I canceled the previous
> but it sent anyways. Thanks.
>
>
> On 19/12/15 12:50, Josh wrote:
>
> I have put the main code onto the sd card and I use the shell to call the
> function prog-loop. The light just stays on. I've had this problem before
> with the example blink program, if I change any of it to make it shorter by
> using shorter function names like (de low () (pio-pin-setlow 'PB_29)) it
> doesn't work, but it does when it's just (pio-pijn-setlow 'PB_29). I don't
> really know what's going on, but it's starting to get irritating.
> On 19/12/15 03:45, Raman Gopalan wrote:
>
>
> Dear Josh, greetings!
>
> Firstly, great to know you're playing with your board! Perfect!
>
> > Why does this small amount of code not make the onboard LED flash?
>
> I think you're not providing enough delay for you to see the off state
> of the LED. Why don't you try this? I've just inserted an additional
> delay.
>
> (pio-pin-setdir *pio-output* 'PB_29)
> (pio-pin-sethigh 'PB_29)
>
> (loop
>(pio-pin-setlow 'PB_29)
>(tmr-delay 0 10)
>(pio-pin-sethigh 'PB_29)
>(tmr-delay 0 10) )
>
> > Any ideas? Also this example on the hempl wiki book:
>
> This example doesn't blink the on-board LED. It just reads the status
> of an input pin (SW-1 I think; the one near the voltage regulator) and
> turns the blue LED on when this input switch is pressed.
>
> > # And now, the main loop
> > (de prog-loop ()
> >(init-pins)
> >(loop
> >   (if (= 0 (pio-pin-getval button))
> >  (pio-pin-setlow led)
> >  (delay 10)
> >  (pio-pin-sethigh led)
> >  (delay 10) ) ) )
>
> Please copy the example on your micro-SD card and point picolisp in
> the direction of this file. If this doesn't happen, something strange
> is happening. We can then debug. But I'm almost certain it'll work :)
>
> Hempl# picolisp /mmc/user-button.l
>
> R
>
> P.S. You may also use the internal transient symbol `*tmr-sys-timer*'
> in the function tmr-delay. I think it uses a hardware PWM channel to
> generate the time (can't remember which; I'll have to see the sources
> again). That makes the timing accurate.
>
>
> On 18 December 2015 at 22:08, Josh  > wrote:
>
>> Why does this small amount of code not make the onboard LED flash?
>> (pio-pin-setdir *pio-output* 'PB_29)
>> (pio-pin-sethigh 'PB_29)
>> (loop (pio-pin-setlow 'PB_29)
>>  (tmr-delay 0 10)
>>  (pio-pin-sethigh 'PB_29))
>> All that happens in the blue LED turns on and stays on, even though the
>> code clearly says for it to go from high to low repeatedly. Any ideas? Also
>> this example on the hempl wiki book:
>>
>> # A simple program which demonstrates
>> # the usage of user-buttons.
>>  # declare pins
>> (setq led 'PB_29 button 'PX_16)
>>
>> # a simple delay function
>> (de delay (t)
>>(tmr-delay 0 t) )
>>
>> # make sure the LED starts in
>> # the "off" position and enable
>> # input/output pins
>> (de init-pins ()
>>(pio-pin-sethigh led)
>>(pio-pin-setdir *pio-output* led)
>>(pio-pin-setdir *pio-input* button) )
>>
>> # And now, the main loop
>> (de prog-loop ()
>>(init-pins)
>>(loop
>>   (if (= 0 (pio-pin-getval button))
>>  (pio-pin-setlow led)
>>  (delay 10)
>>  (pio-pin-sethigh led)
>>  (delay 10) ) ) )
>>
>> (prog-loop)
>>
>> Doesn't make the LED flash it just stays on.
>>
>> --
>> UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
>>
>
>
>
>


-- 
Andrés

*~ La mejor manera de librarse de la tentación es caer en ella**. ~ Oscar
Wilde* ~

Re: Why won't the LED flash?

[J B]

No circuit just the plain old Mizar B. The Example from the hempl wiki book is 
flashing PB_29. I'm Ubuntu to  connect with terminal.

Sent from my iPhone

> On Dec 20, 2015, at 12:12 PM, pd  wrote:
> 
> sorry if you already said this but what platform are you using? also a 
> schematic of your circuit would be interesting even being so simple
> 
>> On Sun, Dec 20, 2015 at 3:18 AM, Josh  wrote:
>> Thought it might be a firmware problem or something, so I just re-flashed 
>> the firmware but it's still happening, just eliminating possibilities. Also 
>> the second of my last emails was the correct one, I canceled the previous 
>> but it sent anyways. Thanks.
>> 
>> 
>>> On 19/12/15 12:50, Josh wrote:
>>> I have put the main code onto the sd card and I use the shell to   call 
>>> the function prog-loop. The light just stays on. I've had this problem 
>>> before with the example blink program, if I change any of it to make it 
>>> shorter by using shorter function names like (de low () (pio-pin-setlow 
>>> 'PB_29)) it doesn't work, but it does when it's just (pio-pijn-setlow 
>>> 'PB_29). I don't really know what's going on, but it's starting to get 
>>> irritating.
 On 19/12/15 03:45, Raman Gopalan wrote:
 
 Dear Josh, greetings!
 
 Firstly, great to know you're playing with your board! Perfect!
 
 > Why does this small amount of code not make the onboard LED flash?
 
 I think you're not providing enough delay for you to see the   off 
 state
 of the LED. Why don't you try this? I've just inserted an additional
 delay.
 
 (pio-pin-setdir *pio-output* 'PB_29)
 (pio-pin-sethigh 'PB_29)
 
 (loop
(pio-pin-setlow 'PB_29)
(tmr-delay 0 10)
(pio-pin-sethigh 'PB_29)
(tmr-delay 0 10) )
 
 > Any ideas? Also this example on the hempl wiki book:
 
 This example doesn't blink the on-board LED. It just reads the status
 of an input pin (SW-1 I think; the one near the voltage regulator) and
 turns the blue LED on when this input switch is pressed.
 
 > # And now, the main loop
 > (de prog-loop ()
 >(init-pins)
 >(loop
 >   (if (= 0 (pio-pin-getval button))
 >  (pio-pin-setlow led)
 >  (delay 10)
 >  (pio-pin-sethigh led)
 >  (delay 10) ) ) )
 
 Please copy the example on your micro-SD card and point picolisp in
 the direction of this file. If this doesn't happen, something strange
 is happening. We can then debug. But I'm almost certain it'll work :)
 
 Hempl# picolisp /mmc/user-button.l
 
 R
 
 P.S. You may also use the internal transient symbol `*tmr-sys-timer*'
 in the function tmr-delay. I think it uses a hardware PWM channel to
 generate the time (can't remember which; I'll have to see the sources
 again). That makes the timing accurate.
 
 
 On 18 December 2015 at 22:08, Josh  wrote:
> Why does this small amount of code not make the onboard LED flash?
> (pio-pin-setdir *pio-output* 'PB_29)
> (pio-pin-sethigh 'PB_29)
> (loop (pio-pin-setlow 'PB_29)
>  (tmr-delay 0 10)
>  (pio-pin-sethigh 'PB_29))
> All that happens in the blue LED turns on and stays on, even though the 
> code clearly says for it to go from high to low repeatedly. Any ideas? 
> Also this example on the hempl wiki book:
> 
> # A simple program which demonstrates
> # the usage of user-buttons.
>  # declare pins
> (setq led 'PB_29 button 'PX_16)
> 
> # a simple delay function
> (de delay (t)
>(tmr-delay 0 t) )
> 
> # make sure the LED starts in
> # the "off" position and enable
> # input/output pins
> (de init-pins ()
>(pio-pin-sethigh led)
>(pio-pin-setdir *pio-output* led)
>(pio-pin-setdir *pio-input* button) )
> 
> # And now, the main loop
> (de prog-loop ()
>(init-pins)
>(loop
>   (if (= 0 (pio-pin-getval button))
>  (pio-pin-setlow led)
>  (delay 10)
>  (pio-pin-sethigh led)
>  (delay 10) ) ) )
> 
> (prog-loop)
> 
> Doesn't make the LED flash it just stays on.
> 
> -- 
> UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
> 
> 
> 
> -- 
> Andrés
> 
> ~ La mejor manera de librarse de la tentación es caer en ella. ~ Oscar Wilde ~

Re: Why won't the LED flash?

[Josh]

Thought it might be a firmware problem or something, so I just 
re-flashed the firmware but it's still happening, just eliminating 
possibilities. Also the second of my last emails was the correct one, I 
canceled the previous but it sent anyways. Thanks.


On 19/12/15 12:50, Josh wrote:
I have put the main code onto the sd card and I use the shell to call 
the function prog-loop. The light just stays on. I've had this problem 
before with the example blink program, if I change any of it to make 
it shorter by using shorter function names like (de low () 
(pio-pin-setlow 'PB_29)) it doesn't work, but it does when it's just 
(pio-pijn-setlow 'PB_29). I don't really know what's going on, but 
it's starting to get irritating.

On 19/12/15 03:45, Raman Gopalan wrote:


Dear Josh, greetings!

Firstly, great to know you're playing with your board! Perfect!

> Why does this small amount of code not make the onboard LED flash?

I think you're not providing enough delay for you to see the off state
of the LED. Why don't you try this? I've just inserted an additional
delay.

(pio-pin-setdir *pio-output* 'PB_29)
(pio-pin-sethigh 'PB_29)

(loop
   (pio-pin-setlow 'PB_29)
   (tmr-delay 0 10)
   (pio-pin-sethigh 'PB_29)
   (tmr-delay 0 10) )

> Any ideas? Also this example on the hempl wiki book:

This example doesn't blink the on-board LED. It just reads the status
of an input pin (SW-1 I think; the one near the voltage regulator) and
turns the blue LED on when this input switch is pressed.

> # And now, the main loop
> (de prog-loop ()
>(init-pins)
>(loop
>   (if (= 0 (pio-pin-getval button))
>  (pio-pin-setlow led)
>  (delay 10)
>  (pio-pin-sethigh led)
>  (delay 10) ) ) )

Please copy the example on your micro-SD card and point picolisp in
the direction of this file. If this doesn't happen, something strange
is happening. We can then debug. But I'm almost certain it'll work :)

Hempl# picolisp /mmc/user-button.l

R

P.S. You may also use the internal transient symbol `*tmr-sys-timer*'
in the function tmr-delay. I think it uses a hardware PWM channel to
generate the time (can't remember which; I'll have to see the sources
again). That makes the timing accurate.


On 18 December 2015 at 22:08, Josh > wrote:


Why does this small amount of code not make the onboard LED flash?
(pio-pin-setdir *pio-output* 'PB_29)
(pio-pin-sethigh 'PB_29)
(loop (pio-pin-setlow 'PB_29)
 (tmr-delay 0 10)
 (pio-pin-sethigh 'PB_29))
All that happens in the blue LED turns on and stays on, even
though the code clearly says for it to go from high to low
repeatedly. Any ideas? Also this example on the hempl wiki book:

# A simple program which demonstrates
# the usage of user-buttons.
 # declare pins
(setq led 'PB_29 button 'PX_16)

# a simple delay function
(de delay (t)
   (tmr-delay 0 t) )

# make sure the LED starts in
# the "off" position and enable
# input/output pins
(de init-pins ()
   (pio-pin-sethigh led)
   (pio-pin-setdir *pio-output* led)
   (pio-pin-setdir *pio-input* button) )

# And now, the main loop
(de prog-loop ()
   (init-pins)
   (loop
  (if (= 0 (pio-pin-getval button))
 (pio-pin-setlow led)
 (delay 10)
 (pio-pin-sethigh led)
 (delay 10) ) ) )

(prog-loop)

Doesn't make the LED flash it just stays on.

-- 
UNSUBSCRIBE: mailto:picolisp@software-lab.de

?subject=Unsubscribe

Re: Why won't the LED flash?

[Josh]

I have put the main code onto the sd card and I use the shell to call 
the function prog-loop. The light just stays on. I've had this problem 
before with the example blink program, if I change any of it to make it 
shorter by using shorter function names like (setq low (pio-pin-setlow 
'PB_29)) it doesn't work, when logically it meets the syntax and makes 
sense.


On 19/12/15 03:45, Raman Gopalan wrote:


Dear Josh, greetings!

Firstly, great to know you're playing with your board! Perfect!

> Why does this small amount of code not make the onboard LED flash?

I think you're not providing enough delay for you to see the off state
of the LED. Why don't you try this? I've just inserted an additional
delay.

(pio-pin-setdir *pio-output* 'PB_29)
(pio-pin-sethigh 'PB_29)

(loop
   (pio-pin-setlow 'PB_29)
   (tmr-delay 0 10)
   (pio-pin-sethigh 'PB_29)
   (tmr-delay 0 10) )

> Any ideas? Also this example on the hempl wiki book:

This example doesn't blink the on-board LED. It just reads the status
of an input pin (SW-1 I think; the one near the voltage regulator) and
turns the blue LED on when this input switch is pressed.

> # And now, the main loop
> (de prog-loop ()
>(init-pins)
>(loop
>   (if (= 0 (pio-pin-getval button))
>  (pio-pin-setlow led)
>  (delay 10)
>  (pio-pin-sethigh led)
>  (delay 10) ) ) )

Please copy the example on your micro-SD card and point picolisp in
the direction of this file. If this doesn't happen, something strange
is happening. We can then debug. But I'm almost certain it'll work :)

Hempl# picolisp /mmc/user-button.l

R

P.S. You may also use the internal transient symbol `*tmr-sys-timer*'
in the function tmr-delay. I think it uses a hardware PWM channel to
generate the time (can't remember which; I'll have to see the sources
again). That makes the timing accurate.


On 18 December 2015 at 22:08, Josh > wrote:


Why does this small amount of code not make the onboard LED flash?
(pio-pin-setdir *pio-output* 'PB_29)
(pio-pin-sethigh 'PB_29)
(loop (pio-pin-setlow 'PB_29)
 (tmr-delay 0 10)
 (pio-pin-sethigh 'PB_29))
All that happens in the blue LED turns on and stays on, even
though the code clearly says for it to go from high to low
repeatedly. Any ideas? Also this example on the hempl wiki book:

# A simple program which demonstrates
# the usage of user-buttons.
 # declare pins
(setq led 'PB_29 button 'PX_16)

# a simple delay function
(de delay (t)
   (tmr-delay 0 t) )

# make sure the LED starts in
# the "off" position and enable
# input/output pins
(de init-pins ()
   (pio-pin-sethigh led)
   (pio-pin-setdir *pio-output* led)
   (pio-pin-setdir *pio-input* button) )

# And now, the main loop
(de prog-loop ()
   (init-pins)
   (loop
  (if (= 0 (pio-pin-getval button))
 (pio-pin-setlow led)
 (delay 10)
 (pio-pin-sethigh led)
 (delay 10) ) ) )

(prog-loop)

Doesn't make the LED flash it just stays on.

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Re: Why won't the LED flash?

[Josh]

I have put the main code onto the sd card and I use the shell to call 
the function prog-loop. The light just stays on. I've had this problem 
before with the example blink program, if I change any of it to make it 
shorter by using shorter function names like (de low () (pio-pin-setlow 
'PB_29)) it doesn't work, but it does when it's just (pio-pijn-setlow 
'PB_29). I don't really know what's going on, but it's starting to get 
irritating.

On 19/12/15 03:45, Raman Gopalan wrote:


Dear Josh, greetings!

Firstly, great to know you're playing with your board! Perfect!

> Why does this small amount of code not make the onboard LED flash?

I think you're not providing enough delay for you to see the off state
of the LED. Why don't you try this? I've just inserted an additional
delay.

(pio-pin-setdir *pio-output* 'PB_29)
(pio-pin-sethigh 'PB_29)

(loop
   (pio-pin-setlow 'PB_29)
   (tmr-delay 0 10)
   (pio-pin-sethigh 'PB_29)
   (tmr-delay 0 10) )

> Any ideas? Also this example on the hempl wiki book:

This example doesn't blink the on-board LED. It just reads the status
of an input pin (SW-1 I think; the one near the voltage regulator) and
turns the blue LED on when this input switch is pressed.

> # And now, the main loop
> (de prog-loop ()
>(init-pins)
>(loop
>   (if (= 0 (pio-pin-getval button))
>  (pio-pin-setlow led)
>  (delay 10)
>  (pio-pin-sethigh led)
>  (delay 10) ) ) )

Please copy the example on your micro-SD card and point picolisp in
the direction of this file. If this doesn't happen, something strange
is happening. We can then debug. But I'm almost certain it'll work :)

Hempl# picolisp /mmc/user-button.l

R

P.S. You may also use the internal transient symbol `*tmr-sys-timer*'
in the function tmr-delay. I think it uses a hardware PWM channel to
generate the time (can't remember which; I'll have to see the sources
again). That makes the timing accurate.


On 18 December 2015 at 22:08, Josh > wrote:


Why does this small amount of code not make the onboard LED flash?
(pio-pin-setdir *pio-output* 'PB_29)
(pio-pin-sethigh 'PB_29)
(loop (pio-pin-setlow 'PB_29)
 (tmr-delay 0 10)
 (pio-pin-sethigh 'PB_29))
All that happens in the blue LED turns on and stays on, even
though the code clearly says for it to go from high to low
repeatedly. Any ideas? Also this example on the hempl wiki book:

# A simple program which demonstrates
# the usage of user-buttons.
 # declare pins
(setq led 'PB_29 button 'PX_16)

# a simple delay function
(de delay (t)
   (tmr-delay 0 t) )

# make sure the LED starts in
# the "off" position and enable
# input/output pins
(de init-pins ()
   (pio-pin-sethigh led)
   (pio-pin-setdir *pio-output* led)
   (pio-pin-setdir *pio-input* button) )

# And now, the main loop
(de prog-loop ()
   (init-pins)
   (loop
  (if (= 0 (pio-pin-getval button))
 (pio-pin-setlow led)
 (delay 10)
 (pio-pin-sethigh led)
 (delay 10) ) ) )

(prog-loop)

Doesn't make the LED flash it just stays on.

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Re: Why won't the LED flash?

[Raman Gopalan]

Dear Josh, greetings!

Firstly, great to know you're playing with your board! Perfect!

> Why does this small amount of code not make the onboard LED flash?

I think you're not providing enough delay for you to see the off state
of the LED. Why don't you try this? I've just inserted an additional
delay.

(pio-pin-setdir *pio-output* 'PB_29)
(pio-pin-sethigh 'PB_29)

(loop
   (pio-pin-setlow 'PB_29)
   (tmr-delay 0 10)
   (pio-pin-sethigh 'PB_29)
   (tmr-delay 0 10) )

> Any ideas? Also this example on the hempl wiki book:

This example doesn't blink the on-board LED. It just reads the status
of an input pin (SW-1 I think; the one near the voltage regulator) and
turns the blue LED on when this input switch is pressed.

> # And now, the main loop
> (de prog-loop ()
>(init-pins)
>(loop
>   (if (= 0 (pio-pin-getval button))
>  (pio-pin-setlow led)
>  (delay 10)
>  (pio-pin-sethigh led)
>  (delay 10) ) ) )

Please copy the example on your micro-SD card and point picolisp in
the direction of this file. If this doesn't happen, something strange
is happening. We can then debug. But I'm almost certain it'll work :)

Hempl# picolisp /mmc/user-button.l

R

P.S. You may also use the internal transient symbol `*tmr-sys-timer*'
in the function tmr-delay. I think it uses a hardware PWM channel to
generate the time (can't remember which; I'll have to see the sources
again). That makes the timing accurate.


On 18 December 2015 at 22:08, Josh  wrote:

> Why does this small amount of code not make the onboard LED flash?
> (pio-pin-setdir *pio-output* 'PB_29)
> (pio-pin-sethigh 'PB_29)
> (loop (pio-pin-setlow 'PB_29)
>  (tmr-delay 0 10)
>  (pio-pin-sethigh 'PB_29))
> All that happens in the blue LED turns on and stays on, even though the
> code clearly says for it to go from high to low repeatedly. Any ideas? Also
> this example on the hempl wiki book:
>
> # A simple program which demonstrates
> # the usage of user-buttons.
>  # declare pins
> (setq led 'PB_29 button 'PX_16)
>
> # a simple delay function
> (de delay (t)
>(tmr-delay 0 t) )
>
> # make sure the LED starts in
> # the "off" position and enable
> # input/output pins
> (de init-pins ()
>(pio-pin-sethigh led)
>(pio-pin-setdir *pio-output* led)
>(pio-pin-setdir *pio-input* button) )
>
> # And now, the main loop
> (de prog-loop ()
>(init-pins)
>(loop
>   (if (= 0 (pio-pin-getval button))
>  (pio-pin-setlow led)
>  (delay 10)
>  (pio-pin-sethigh led)
>  (delay 10) ) ) )
>
> (prog-loop)
>
> Doesn't make the LED flash it just stays on.
>
> --
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>

Re: Why won't the LED flash?

[Josh]

Thanks for the reply, but that time is 1/5th of the time for the 
blinking LED example, and 1/5th a second is enough for an eye to see. 
Anyways, this little bit:

>  (pio-pin-setlow led)
>  (delay 10)
>  (pio-pin-sethigh led)
>  (delay 10) ) ) )
Is exactly the same as the code from the "quick start" where it makes 
the LED blink, it only uses a shorter time period. Another thing, on the 
Hempl website where I copy and pasted the code, it says " We will read 
the pin connected to the onboard user button and, as long as it is 
pressed down, we will make the on-board LED flicker. I"



But it doesn't blink, I adjusted the times to make them five times 
higher and it just waits around 1 second and the LED turns on but 
doesn't blink like it should. Any ideas? It should blink, clearly 
setting it from on then off and looping it should blink, but it won't.


On 19/12/15 03:45, Raman Gopalan wrote:


Dear Josh, greetings!

Firstly, great to know you're playing with your board! Perfect!

> Why does this small amount of code not make the onboard LED flash?

I think you're not providing enough delay for you to see the off state
of the LED. Why don't you try this? I've just inserted an additional
delay.

(pio-pin-setdir *pio-output* 'PB_29)
(pio-pin-sethigh 'PB_29)

(loop
   (pio-pin-setlow 'PB_29)
   (tmr-delay 0 10)
   (pio-pin-sethigh 'PB_29)
   (tmr-delay 0 10) )

> Any ideas? Also this example on the hempl wiki book:

This example doesn't blink the on-board LED. It just reads the status
of an input pin (SW-1 I think; the one near the voltage regulator) and
turns the blue LED on when this input switch is pressed.

> # And now, the main loop
> (de prog-loop ()
>(init-pins)
>(loop
>   (if (= 0 (pio-pin-getval button))
>  (pio-pin-setlow led)
>  (delay 10)
>  (pio-pin-sethigh led)
>  (delay 10) ) ) )

Please copy the example on your micro-SD card and point picolisp in
the direction of this file. If this doesn't happen, something strange
is happening. We can then debug. But I'm almost certain it'll work :)

Hempl# picolisp /mmc/user-button.l

R

P.S. You may also use the internal transient symbol `*tmr-sys-timer*'
in the function tmr-delay. I think it uses a hardware PWM channel to
generate the time (can't remember which; I'll have to see the sources
again). That makes the timing accurate.


On 18 December 2015 at 22:08, Josh > wrote:


Why does this small amount of code not make the onboard LED flash?
(pio-pin-setdir *pio-output* 'PB_29)
(pio-pin-sethigh 'PB_29)
(loop (pio-pin-setlow 'PB_29)
 (tmr-delay 0 10)
 (pio-pin-sethigh 'PB_29))
All that happens in the blue LED turns on and stays on, even
though the code clearly says for it to go from high to low
repeatedly. Any ideas? Also this example on the hempl wiki book:

# A simple program which demonstrates
# the usage of user-buttons.
 # declare pins
(setq led 'PB_29 button 'PX_16)

# a simple delay function
(de delay (t)
   (tmr-delay 0 t) )

# make sure the LED starts in
# the "off" position and enable
# input/output pins
(de init-pins ()
   (pio-pin-sethigh led)
   (pio-pin-setdir *pio-output* led)
   (pio-pin-setdir *pio-input* button) )

# And now, the main loop
(de prog-loop ()
   (init-pins)
   (loop
  (if (= 0 (pio-pin-getval button))
 (pio-pin-setlow led)
 (delay 10)
 (pio-pin-sethigh led)
 (delay 10) ) ) )

(prog-loop)

Doesn't make the LED flash it just stays on.

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