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Discussion Title Created date
inline assember - set/get a uint32_t to registers...
I have a bootloader that acquires its serial number from the bootloader section, but I don't want the app to be able to read the bootloader section so I will have the fuse bits...
Wednesday, 18 April 2018 - 21:00
Do the boot.h functions require using atomic/cli ?
Like boot_page_fill() - can I call this function with interrupts enabled, or must I disable them first or use an atomic block?
Wednesday, 11 April 2018 - 01:09
Couple of TWI questions...
Does Atmel now Microchip have an AVR### type document where they make an ISR driven driver for TWI master and/or slave?   Does it make sense (save CPU cycles) to do the...
Monday, 2 April 2018 - 02:06
5V AVR to 3.3V microSD _and_ SPI RTC (1.8-5.5V)
I've been reading various pages about this, and there seems to be many approaches.   Does it make sense to put the RTC also in the 3.3V "realm" along with the microSD ?...
Wednesday, 7 March 2018 - 03:10
Behold . . . new dip adapters are born...
So yes, I love making/putting AVR's on DIP adapters...  The top is MEGA64A I plan to use for I/O with a Z80 and the bottom is TINY1614 so I can get down to playing with uPDI...
Saturday, 24 February 2018 - 04:00
What is the story with the PEN pin on the ATMEGA64A
I've read through the datasheet and I'm not really getting it.  Can you operate the ATMEGA64A using ISP with the RESET like others?  What is the point of the PEN?
Friday, 23 February 2018 - 02:24
ATMEGA64A memory interface
I am planning on doing a Z80 project where I am going to have an ATMEGA64A be the I/O controller for the Z80.  I am going to use the flip flop method that I've seen a few...
Thursday, 22 February 2018 - 04:04
Is there a 64pin (QFP) AVR with 2 USART's?
I can't find the Atmel selector anymore...
Friday, 9 February 2018 - 22:10
Which uPDI
I'm going to get started on adding uPDI support to my autoprogrammer.  What is a good uPDI chip to order for messing around with this?  I saw the ATTINY817-XMINI-ND, but...
Friday, 9 February 2018 - 13:14
CHRISTmas Autoprogrammer Giveaway - enter here for your chance!
Hi Everyone,   For my friends here at AVRFREAKS:  I am going to give away a 256K Autoprogrammer to one lucky winner!  Postage is included for US folks; I'll cover...
Saturday, 23 December 2017 - 21:17
Why did it emit this code?
//clear timer TCNT1=0; 714c: 10 92 85 00 sts 0x0085, r1 ; 0x800085 <__TEXT_REGION_LENGTH__+0x7e0085> 7150: 10 92 84 00 sts 0x0084, r1 ; 0x800084 <...
Thursday, 2 November 2017 - 15:58
Producing code without interrupt table testing
I've used the -nostartfiles option before and found that gcc oddly includes some startup code, but leaves some startup code out.  In fact, doing a comparison between a mostly...
Tuesday, 31 October 2017 - 21:32

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