If you mean CTS/RTS, they are available on P5. Though I do not see what that has to do with using differential signalling.M33P wrote:If you're going to multiplex Pis together, perhaps you should consider a 3-wire RS485-style bus arrangement - but unfortunately the PL011 UART on the Pi doesn't have any flow control pins mapped out...
I believe the intended reference was for RS-485 multidrop signalling where the RTS line may be used to for controlling the transmitter state. RTS0 is also available on P1 (alternate function for GPIO 17).jojopi wrote:If you mean CTS/RTS, they are available on P5. Though I do not see what that has to do with using differential signalling.
Yes, this is OK with me. It's a good feature, and shouldn't be changed. I could live with the outputs connected to each other, if I was sure all the outputs are driving the same level. It is the PL011 uart which is enabled, no? Its baud rate can be set to, according to the datasheet "dc to uartclock/16". So I tried setting "init_uart_baud=0" in config.txt, which should extend the start bit to last forever, but transmission speed is still 115200.The GPU [...] does configure those pins to use the UART alt function, so TX will be configured as an output.
I'll give that a try, only thing is, if I forget it after an update, I have a whole bunch of Pi's to sell on ebay with defective TX driversSimply using an uncompressed kernel image should avoid that message
Hah, simply I thought it was simple, but I can't find out how to decompress the kernel. Seems to be a bit different than on intel platformkarlkiste wrote:I'll give that a try, [...]Simply using an uncompressed kernel image should avoid that message
As the usual scripts did not work, I had a little script try to gunzip the file after cutting away (n=n+1) bytes from the beginning. So this line worked:karlkiste wrote: Hah, simply I thought it was simple, but I can't find out how to decompress the kernel.
Where in the source code could i see whats happen to the UART? My problem is verry similar: viewtopic.php?f=66&t=135534dom wrote: The GPU doesn't output data to uart, but it does configure those pins to use the UART alt function, so TX will be configured as an output.
You have already posted to a new thread. That is all that is needed. You also have many replies on that one, so posting here is not needed.ThoManPi wrote:It seems to me also in this thread the problem has not been solved. I had announced myself in the forum to be able to solve this problem and I do not know how to reach the really knowing ones.