pyboard.py

[zs6mdh]

This script is awesome, well it looks that way. I think Im either doing something wrong or missing something. I like the way I can develop without having to copy the file to the board and reset every time, its especially annoying when I have to keep changing the boot.py to enable and disable the "hard drive".

I tried the exact thing shown in the video, https://www.youtube.com/watch?v=5LbgyDmRu9s#t=288
My code is as follows:

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#test py

import pyb

pyb.Led(1).On()
print ("hello ")

When I run ,

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python3 pyboard.py test.py

It works and switches the light on and gives the hello output

Now lets say I have the following code:

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#test.py
import pyb
print("starting")

sw = pyb.Switch()
rtc = pyb.RTC()
rtc.datetime((2014, 9, 1, 4, 13, 0, 0, 0))
print(rtc.datetime())
T = rtc.datetime()

while True:
    T = rtc.datetime()
    if T[7] < 127:
        S = "%04d/%02d/%02d %02d:%02d" % (T[0],T[1],T[2],T[4],T[5])
    else:
        S = "%04d/%02d/%02d %02d %02d" % (T[0],T[1],T[2],T[4],T[5])

    print (S)
    pyb.LED(1).toggle()
    pyb.delay(1000)

There is a permanent loop in this one and I get no output. Is there a way I can do this and still get the live output?

Im trying to develop with writing to files and the only other way I can see is as follows
1. I copy the py file to the device
2. reset it without hard drive access from the pc
3. check on repl for the debug output
4. modify the file on the pc
5. reset the pyboard again with hard drive access
6. start from 1 again.

[pythoncoder]

Your code runs fine here. I'd consider updating your firmware if you're getting no output.
Regards, Pete

[zs6mdh]

Ok I upgraded to pybv10-2014-10-20-v1.3.3-99-g072bd07.dfu and it still does the same thing.

The program runs, and the led flashes
No output happens when you loop
Another thing if I use Ctrl-C I get the command line but the program carries on running.

[dhylands]

It looks like pyboard.py collects the output and doesn't actually print it out until the script finishes.

If you edit pyboard.py and add the following 2 lines after the else: here https://github.com/micropython/micropyt ... py#L49-L52

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                print(str(data, encoding='ascii'), end='')
                data = b''

so the read_until function will look like:

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    def read_until(self, min_num_bytes, ending, timeout=10):
        data = self.serial.read(min_num_bytes)
        timeout_count = 0
        while True:
            if self.serial.inWaiting() > 0:
                data = data + self.serial.read(self.serial.inWaiting())
                time.sleep(0.01)
                timeout_count = 0
            elif data.endswith(ending):
                break
            else:
                print(str(data, encoding='ascii'), end='')
                data = b''
                timeout_count += 1
                if timeout_count >= 10 * timeout:
                    break
                time.sleep(0.1)
        return data

then it will print results as it goes along. This is just a hack and probably breaks the original functionality of pyboard.py.

Also make sure that you've disconnected your terminal software (that was connected to the debug output) before running pyboard.py

[dhylands]

Currently the Control-C gets intercepted by the host side script and isn't forwarded (which is why the script keeps running)

[zs6mdh]

Thank you thank you thank you. Thats sooo awesome. It works very well now. This should speed things up.

Thank you so much for all your help.

As soon as I have some code that can be used by others I will post it.

[zs6mdh]

hehe, I see what you mean. there might be a problem with the code now. Its not affecting me really but the following does happen every so often.

After a random time I get the following error.

Traceback (most recent call last):
File "pyboard.py", line 181, in <module>
main()
File "pyboard.py", line 178, in main
execfile(file, device=args.device)
File "pyboard.py", line 105, in execfile
output = pyb.execfile(filename)
File "pyboard.py", line 96, in execfile
return self.exec(pyfile)
File "pyboard.py", line 87, in exec
raise PyboardError('timeout waiting for EOF reception')
__main__.PyboardError: timeout waiting for EOF reception

[zs6mdh]

Ok it was annoying me and I decided to take a closer look. It was much easier than I thought to "fix"

I change the one line from

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data = self.read_until(2, b'\x04>')

to

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data = self.read_until(5, b'\x04>')

That makes the timeout a bit higher, I also made my program send regular print statements and no more timeouts

For reference the whole procedure is as follows now

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    def exec(self, command):
        command_bytes = bytes(command, encoding='ascii')
        for i in range(0, len(command_bytes), 32):
            self.serial.write(command_bytes[i:min(i+32, len(command_bytes))])
            time.sleep(0.01)
        self.serial.write(b'\x04')
        data = self.serial.read(2)
        if data != b'OK':
            raise PyboardError('could not exec command')
        data = self.read_until(5, b'\x04>')
        if not data.endswith(b'\x04>'):
            print(data)
            raise PyboardError('timeout waiting for EOF reception')
        if data.startswith(b'Traceback') or data.startswith(b'  File '):
            print(data)
            raise PyboardError('command failed')
        return data[:-2]

As an added bonus I worked out a few cool things.
Pyboard has a raw rpl which makes this possible.
Debugging is soo much faster than copying source code across
I basically have the source on my pc and run "python3 pyboard.py main.py" everytime
You can unmount the usb drive and then run your program instead of having to change the boot.py every-time.
Im stupid when it comes to python and have lots to learn

I hope the above helps someone else as well.