This is a direct connection between the two chips on a PCB. Regards, Mark — Mark Stevens mark.stev...@wildernesslabs.co
> On 9 May 2024, at 17:38, Bill Rees <redskyo...@icloud.com.INVALID> wrote: > > > I've seen this problem before which revolved around flow control; essentially > soft versus hard flow control (xmit off/ xmit on) > > Are you using a null modem cable? If not that may give you the accuracy > you're looking for, else hardware flow control is the only other possibility > if it is flow control. > > Bill > > On 5/9/2024 9:24 AM, Tomek CEDRO wrote: >> On Thu, May 9, 2024 at 6:15 PM Mark Stevens >> <mark.stev...@wildernesslabs.co.invalid> wrote: >>> Yes, I am sure both side are configured correctly. >>> If I run the kernel code only then all works as expected. >>> If I run user space code alone all works as expected. >>> The problems happen when I transition from kernel use of the UART to user >>> space use of the UART. >>> I have also connected a logic analyser to the system and all looks good. >>> Also, my current problem is NuttX reading data not sending it. Sending may >>> also be a problem but I have not got that far at the moment. >> Which UART do you use? What happens when you use different UART? Are >> you sure it does not interfere with console? >> >> -- >> CeDeROM, SQ7MHZ, http://www.tomek.cedro.info >
