- Tue Jul 21, 2009 12:18 pm
#77433
Hi all,
Im having a minor problem when I display animations on the (4) RGB matrices I have. Static images turn out fine, however when I output animations I get noise from other pixels that light up for a split second as the frame updates.
Also, it seems that it only happens on the first and last matrix in the chain.
Ive gone over my SPI settings several times, I don't think that its a software problem, but just in case someone catches something I haven't these are the settings I'm using:
// spi enabled, master mode, clock @ f/128 for init
SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR1)|(1<<SPR0);
I suspect it might have to do with the way that I'm powering the matrices. Currently I'm using (2) 7805's - each powers (2) matrices, and each has suppression cap's put in place(100uF and .1uF). The 7805's get power from a supply that provides 8.5v @ 5A.
Any advice that you guys could give me would be greatly appreciated!!
Im having a minor problem when I display animations on the (4) RGB matrices I have. Static images turn out fine, however when I output animations I get noise from other pixels that light up for a split second as the frame updates.
Also, it seems that it only happens on the first and last matrix in the chain.
Ive gone over my SPI settings several times, I don't think that its a software problem, but just in case someone catches something I haven't these are the settings I'm using:
// spi enabled, master mode, clock @ f/128 for init
SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR1)|(1<<SPR0);
I suspect it might have to do with the way that I'm powering the matrices. Currently I'm using (2) 7805's - each powers (2) matrices, and each has suppression cap's put in place(100uF and .1uF). The 7805's get power from a supply that provides 8.5v @ 5A.
Any advice that you guys could give me would be greatly appreciated!!
Last edited by mos6502 on Tue Jul 21, 2009 3:54 pm, edited 1 time in total.