Washing-Machine | Embedded C code for Washing Machine
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Embedded C code for Washing Machine
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QUESTION
it's my first question here in Stackoverflow so excuse me if I forget to mention something!
I am creating an interface for an industrial washing machine using a WPF C# app and an Arduino DUE. They comunicate through a Serial Port.
Serial Port current settings:
- BaudRate = 115200
- Over USB cable (arduino programming port)
- DTR and Rts enabled
- WriteTimeout = 1000;
The Arduino is printing to the Serial Port without any delays, the states of all Analog input pins and a couple Digital input pins.
In the current state of the interface I try to simply turn on and off certain pins, however the c# app freezes and then crashes with the following error message = "System.IO.IOException: 'The semaphore timeout period has expired.".
Heres some experiences I've made and the following results:
Reducing the BaudRate to 9600 managed to make it so some messages get through and the pins turn off and on, if I change them too fast the same error message occurs.
With the baud rate back to 115200 and on the Arduino code i stop the sending of input pin states to the serial port, the error is gone and i can change pin states fast without any problems, but I won't be able to read anything from the arduino.
The Following code represents the arduino code with the sending of analog and digital input states enable. To disable I comment the 2 last lines
...ANSWER
Answered 2021-Aug-22 at 09:02After a few days I have figured out what happened!
The Arduino Due was crashing do to an overflow of data coming from C#!When it crashed C# would throw the Semaphore Timeout Exception and would never recover from it even when a try and catch was in place, and I gave it time to clear the traffic of all the data sent!
Initially the message sent from C# was the following:
serialPort.Write("#30" + pinNumber + power + "\n");
- '#' -> order
- 3 -> Analog Output
- '0'+pinNumber -> pin number (0 is added when the pin number has only 1 digit ex. 02 por pin 2)
- power -> value from 0-255
- '\n' -> end command
When using a slider it would send this message with a different power value many times and in a short time. Crashing the Arduino and requiring a reset.
After days of testing I tried the following message as an experiment:
serialPort.Write(power + "\n");
I temporarily changed the arduino code to only change pin 2, that way only a value to change to was required.
After this change , no matter how fast I dragged the slider from on side to the other, the Arduino would comply and the problem was solved.
QUESTION
I'm initializing all values of a python dict to 0 in the following code:
ANSWER
Answered 2021-Jul-16 at 18:39Use a defaultdict, this will only set the value to 0 when you actually want to use it for the first time:
QUESTION
I have a cart. The add function will create the following array:
...ANSWER
Answered 2021-Jan-17 at 18:04Your are adding totalQty and totalPrice in the same "level" as your `$request->id'.
You should have your expected result doing this:
QUESTION
I have the following sample data:
...ANSWER
Answered 2020-Sep-17 at 17:00You could do a groupBy like this:
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