Yeah, I'm definatly staying within standard FC as much as I can. I'm an engineer, certainly no coder! Sadly the single Hardware UART is being used to drive a LIN output. J.

Well, I still can't get any Software driven UART type to send out anything with the correct Bit timing for 19200 or above. I would have though a PIC running at 32MHz should have been able to do that? Running in HS PLL mode is painful since I'm not sure if the FC internal delays/timers/calculations k...

I'm going down this rabbit hole a bit further to improve my understanding and I 'think' I'm getting there! This needs two instuction cycles, which may explain the larger value I got previously. LATC6 = 1; NOP(); LATC6 = 0; I think this is closer to a single instruction delay and is my TRUE minimum p...

Hi, Thanks Martin, Leigh, As you both stated the method used signiicantly effects the duration of very short pulses. A) toggling single bit of Port C, using the FC output command and delay using a single NOP(); in a C code box. Result a Pulse of : 998nS B) toggling a bit using "LATC6" and ...

Thanks Steve, I got 1uS (998ns) on a single "NOP();" so there is potentially something funky going on. J.

Hi, Side task whilst debugging my test rig. :) How can I create a micro second delay in C code. I wish to avoid the FC Delay function, to exclude that from my investigation. A) One method that uses the PIC timer. B) Second method that avoid the using Timers. Maybe a known loop count of 100 or simila...

Hi Ben, Please move this to another Forum section if its no longer a bug issue. thanks, J. FOsc 20MHz, HS Mode. No PLL. I'm 95% sure clock is correct as this also clocks the hardware UART with No issues. I measure these values on the scope when using the Hardware UART. All of these Work Great and ar...

Thanks for the clarification Leigh! exactly what I needed.

Fair Point regarding the question, everything is down to interpretation.
I asked "when measuring UART baud rate with an oscilloscope do you measure the period or pulse width"
hey ho. J.

HI, I'm battling UART and my trusted method to check Baud is to measure the width of a bit using a scope. When sending 0x55, I have always used the Cursors to measure a single high or low pulse width. I'm getting some subtle timing errors so I thought I would check my basic method with google, then ...

Hi, PIC18F2585 20MHz Xtal. Running latest updates. Issues with UART, OK in hardware mode but will not run anything above 9600 in software mode. I usually can run 19200 without issues. Bit timing looks wrong. getting around 22Khz for a 19600 setting. I checked a LED flash at 10hz on scope, good. but ...