dgirard
Supporting Member
Hello!
I've got a few PX1's on order to help with my transition to Pixels this year.
I'm planning on feeding them with the output from my j1sys DR4.
I see that the PX1 supports a set of baud rates including 115200 and 230400. I'd like to drive it as fast as possible so I can support more pixels if needed (with PI obviously)
My question derives from the speeds supported by the DR4 (which is primarily designed to output DMX, but also supports Renard out). It supports 115200, but higher speeds are different: 250K, 500k, 750K, and higher.
Looking at the source code, it looks like I could add 250K support to the PX1 by just adding a new speed selection and configuring the bit timing calculation in the code with 250000 instead os 230400... I don't care about over the wire programming--I'll make changes only by flashing the firmware--so no need to update the remote setup stuff.
It looks like, in theory this should work...am I right? (in theory at least?)....Obviously, I can just test once my PX1's arrive (but that won't be for a couple months in the group buy)...
Followup question: any thoughts on if it will support speeds higher than 250? (assuming it supports 250?)...I saw some notes that the PIC isn't fast enough to output more than a certain number of pixels, but also the wiki implies support for 460800 (thus perhaps 500k?)...if it can, then I could daisy chain 2 of them for support of 600 pixels with 50ms refresh on one DR4 output channel.
Thoughts?
David
I've got a few PX1's on order to help with my transition to Pixels this year.
I'm planning on feeding them with the output from my j1sys DR4.
I see that the PX1 supports a set of baud rates including 115200 and 230400. I'd like to drive it as fast as possible so I can support more pixels if needed (with PI obviously)
My question derives from the speeds supported by the DR4 (which is primarily designed to output DMX, but also supports Renard out). It supports 115200, but higher speeds are different: 250K, 500k, 750K, and higher.
Looking at the source code, it looks like I could add 250K support to the PX1 by just adding a new speed selection and configuring the bit timing calculation in the code with 250000 instead os 230400... I don't care about over the wire programming--I'll make changes only by flashing the firmware--so no need to update the remote setup stuff.
It looks like, in theory this should work...am I right? (in theory at least?)....Obviously, I can just test once my PX1's arrive (but that won't be for a couple months in the group buy)...
Followup question: any thoughts on if it will support speeds higher than 250? (assuming it supports 250?)...I saw some notes that the PIC isn't fast enough to output more than a certain number of pixels, but also the wiki implies support for 460800 (thus perhaps 500k?)...if it can, then I could daisy chain 2 of them for support of 600 pixels with 50ms refresh on one DR4 output channel.
Thoughts?
David
