Martin Fisher great component Max7219_v2 a question Solved.

[mnfisher]

Just tested and seems to compile okay.

What target are you using - Arduino?

In the component properties - you need to set the SPI pins - including CS - the MAX7219 just uses clock and MOSI - but I didn't manage to find how to use an 'empty pin' - so make sure that the CLK and MOSI are selected correctly. MISO should be B4 and CS should be B2 to use hardware SPI (for speed!) )if you are using Arduino Uno or Nano / ATMega328p) - there is an issue with Arduino SPI CS - PB2 (D10) must be set as an output for hardware SPI to work. If you use software mode then you can choose pins as suit. Set a prescale - as far as I remember any speed will work - but try 'say' 1/16 as an initial test.

Need to call InitialiseLED then try calling Demo as a test that all is working as should be.

Martin

[Viktor74]

Hi Martin, my project with an empty loop does not compile to a *.hex file, when I add the Max7219 component, it gives an error. I work directly with the Atmega328P chip through the UsbAsp programmer, not the arduino.

[mnfisher]

Will test this evening - you also need to set the prescale value in properties - which might cause an issue?

[mnfisher]

Just tested using 328p as target - you do need to set a value for pre-scale (in properties) - gives an error if left blank.

Martin

[Viktor74]

Hi Martin ! Thank you very much, it really helped, I hadn't paid attention to it at first.

[jgu1]

Hi Martin!

I have tryed to open a project I mad in FC8 I can´t compile in FC10 but ok in FC8. I have placed your component in a Lib an made the path in Globel location, do you have any idea what I do wrong, please.

Br Jorgen

[mnfisher]

Hi Jorgen,

Seem to have lots of component not found errors - the max7219 - needs changing to v9?

Also missing is OneWire - and I think the changes are a bit more involved (for example the the DS17b20 temperature monitor needs connecting to a OneWire component (LinkTo in properties)

Martin

[jgu1]

Hi Martin!

Thank you for reply. Do you mean that I first have to open my program in fc9?

I will try to create a link and test.

Br jorgen

[mnfisher]

No, just open in v10 should be okay - but you'll need to change the components to the newer versions. I can't remember if there is an easy 'replace' x with y option.

[jgu1]

Ok Martin, I will do that, you hear

Thank´s