SPI mode and bitrate cannot be changed in Arduino DUE
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I'm using MATLAB R2016a with Arduino DUE. When a SPI device object is created using spidev, it cannot correctly change SPI mode and bitrate. Mode is alway 0 and bitrate is always 4Mbps. I have tried this also with R2019a and it is the same.
For example, I try to use this command to change Mode to 3 and bitrate to 1Mbps:
spidev(a,'D10','Mode',3,'Bitrate',1000000);
But it does not change anything there.
Is there a bug there? How can it be fixed?
Thanks in advance.
1 个评论
Andrey Kiselnikov
2019-8-6
Before using the interfaces you should create the system object that will control the board. Can you attach your script here?
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Andrey Kiselnikov
2019-8-6
Right now I have no Arduino Due, but I can check your script next week. If it will be actual, let me know please.
3 个评论
Andrey Kiselnikov
2019-8-12
Hi, I remember what i promised!
>> a = arduino()
a =
arduino with properties:
Port: 'COM6'
Board: 'Due'
AvailablePins: {'D2-D53', 'A0-A11'}
AvailableDigitalPins: {'D2-D53', 'A0-A11'}
AvailablePWMPins: {'D2-D13'}
AvailableAnalogPins: {'A0-A11'}
AvailableI2CBusIDs: [0, 1]
Libraries: {'SPI'}
>> dev = spidev(a,'D10','Mode',3,'Bitrate',1000000)
Warning: Function spidev will be removed. Use device instead.Click here to turn off this warning.
dev =
spidev with properties:
ChipSelectPin: D10
Pins: SPI-4(MOSI), SPI-1(MISO), SPI-3(SCK)
Mode: 3 (0, 1, 2 or 3)
BitOrder: msbfirst ('msbfirst' or 'lsbfirst')
BitRate: 1000000 (Hz)
And...... I'll create an "issue" in MW inner support service to research this bug and properly describe all limitations. If it was useful for you, mark the answer as accepted.
![test.PNG](https://www.mathworks.com/matlabcentral/answers/uploaded_files/233591/test.png)
更多回答(1 个)
Massoud Tohidian
2019-8-6
编辑:Massoud Tohidian
2019-8-6
2 个评论
Andrey Kiselnikov
2019-8-13
"The 'spidev' function is being replaced by the 'device' function, which may perform better in this situation. " Hi, can you try this way?
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