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Initializing a union struct member from an array during vector declaration
This is a general C++ programming question for a desktop application.  This is the only forum I'm a member of related to programming so I hope it's okay to post here.  ...
Monday, 15 March 2021 - 17:06
Mask a port's input pins?
Atmega 3209, 6-bit Port B.  If use the high two pins for USART3 then is there a way to configure the port so that it only returns the low four bits when read, without the...
Sunday, 14 February 2021 - 21:03
Avr0 IR emitter requirements?
My project is based on the 3209.  It's pretty small and adding more external connectors at this point in development is not something I want to do.  I think my hardware...
Thursday, 26 November 2020 - 16:09
Avr0 self programming primer?
I've got a project based on the ATmega3209, it also uses an SD Card.  I would like to investigate the possibility of firmware upgrades from the SD Card.  The...
Friday, 6 November 2020 - 17:38
AVR0 CCL inputs and logic
I see the AVR0 family (3209 in my case) has Custom Configurable Logic independent of the CPU.  It has D flip-flop, JK flipflop, gated D latch, RS latch, or Lookup Table...
Sunday, 1 November 2020 - 22:26
ATmega3209 - Quickly reading a port after an input
I have a project based around the 3209 coded in C in Atmel Studio, it works fine.  I want to add a feature which will require sampling values of an 8-bit port (hereby called...
Saturday, 24 October 2020 - 18:02
Software for CPLD design?
I would like to become familiar with CPLD's such as the ATF15xxAS.  I've done some research but am still unsure what the technique is for designing the desired logic and...
Tuesday, 7 April 2020 - 13:59
Modifying CF-card firmware/ID?
Once upon a time there was a device that would only work with an obsolete IDE drive whose ATA ID contains a certain string.  Since CF cards are ATA...
Wednesday, 16 October 2019 - 15:48
Measuring frequencies higher than the AVR?
I would like to explore building a small device that can sample and display 2 or 3 frequencies.  The high range (maybe 30MHz) would exceed the AVR's frequency.  0.1MHz...
Monday, 23 September 2019 - 18:11
AVR-0 Core independent LED fading?
Atmega 3209 (AVR 0 series).  I understand an led fading effect can be accomplished with pulses but I might not want to have my AVR distracted as it's got some...
Thursday, 5 September 2019 - 15:53
SD-Card & EEPROM on SPI
I have a project that uses an SD Card on the SPI interface.  I also wanted to add a small amount of extra EEPROM.  The EEPROMs come in SPI and TWI interfaces....
Monday, 19 August 2019 - 12:40
SD Card 5v to 3.3v level shifting for AVR
I've got two SD Card modules with onboard 5v to 3.3v conversion however they are implemented quite differently.  They both have 1117 LDO regulators for 3.3v.  One...
Sunday, 14 April 2019 - 14:08

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