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Mega-0 Port Inputs ?
I want to set up an input interrupt on BOTH edges, then read the input state to tell whether it was a rising edge or falling edge that was the cause of the interrupt.   When...
Saturday, 22 August 2020 - 05:43
Mega4809 _PROTECTED_WRITE undefined
This is embarrassing!   I have the  following bare-bones program start   /* * EventDemo.c * * Created: 8/19/2020 9:30:17 AM * Author : wagne */ #...
Thursday, 20 August 2020 - 05:05
Mega-0 TCB Capture Trigger?
I have been looking, so far fruitlessly, to find a software trigger for TCB capture. It only seems to connect to the Event System. Is this correct, or is there a bit that can be...
Friday, 14 August 2020 - 01:05
Mega4809 TCA Oddity
Greetings Freaks -   I have been playing with the  RTC and the TCA peripherals, as I will describe. It has been a bit like a puzzle that  does not have all the...
Monday, 3 August 2020 - 22:31
Mega4809 (and Mega0 generally) Spec Sheets
Greetings   Was just looking on the Microchip web site for an updated version of the Mega0 spec sheet to use with Mega4809. As far as I can tell, there is nothing there...
Monday, 3 August 2020 - 20:53
AVRmega4809, vs AVRxxxDA?
Been working hard on a product update from Mega328 to '4809. Now, we have the 'DA series.   Is there someplace that compares and contrasts these two lines ('4809 vs 'DA)? I...
Wednesday, 29 July 2020 - 00:10
Strange mega4809 RTC behavior?
Greetings and welcome to the N+1 installment of "Fun With Mega4809". Enjoy. Hope someone knows what is happening here. Environment is ATmega4809 XPlained Pro at 16MHz.   I am...
Thursday, 23 July 2020 - 00:48
Mega4809 Event System Confusion
Yes, I know that there is a wh0le lot of confusion going on here, but that comes with trying to learn something that is well above your existing knowledge level.    My...
Wednesday, 22 July 2020 - 02:21
M4809 RealTime Clock puzzles [solved]
Greetings Freaks!   I am trying to  understand how the RTC works in the Mega4809. I am using the really nice ATmega4809 Xplained Pro (which has no 32KHz crystal). And,...
Monday, 20 July 2020 - 01:29
Mega-0 interrupt timing ?
Greetings Freaks ...   As I continue to read the Mega4809 manual, I find more puzzles. This one is   12.3.2.3 Interrupt Response Time The minimum interrupt response...
Saturday, 18 July 2020 - 20:10
Mega-0 SET/CLR Puzzle
Reading sections of the megaAVR-0 series manual.   Section 3.4 discusses registers and bits. The last item refers to SET/CLR operations. It says:   Registers with SET/...
Friday, 17 July 2020 - 03:10
Correcting the M4809 RTC?
The new Mega0 devices offer RTC "Crystal Error Correction" capability.   I've looked at TB3213 "Getting Started with RTC" and it does not even mention this.   The M4809...
Thursday, 9 July 2020 - 18:23

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