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more the 8 daisy chained #15
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As far as I know the packet size for the chip is 16 bytes, which has 8 bytes of data. That means a maximum of 7 no-op bytes and as such it is limited to a maximum of 8 chips. https://datasheets.maximintegrated.com/en/ds/MAX7219-MAX7221.pdf |
Thank You for the response! Makes sense. On Fri, Apr 15, 2016 at 2:45 PM, Matti Eiden notifications@github.com
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I do not think that's the reason. |
Yeah, I remember this was a wrong conclusion. More than 8 can be chained. |
include.docx |
@voneiden can u please help me to chain 10 (8x8) matrices. I have code which is capable of running 4 matrices. i am trying to make it to run 10 matrices. but no succeeded yet. can you help me in any way. My email id ghanshyam6298@gmail.com . my hardware part is done and is working but in group of 4+4+2. the attached here is the code i am using. can you make desired changes in this code to make it run 10 matrices. if not 10 than at least 8. |
@klarson18 It is hardcoded in the LedControl.cpp file. To get more than 8 matrices working go to your Arduino library folder, in my case it is located at:
There open the LedControl.cpp file with an editor like notepad++ and remove lines 50 and 51. |
I would like to "daisychain" 10 7219 chips using ledcontrol.h but I am only successful with 8. Is this a software issue or a chip issue? Thanks
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