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Best Option for Wireless Application
I have an application that requires short range wireless communication between two low power devices. I have selected the ATMEGA128RFA1 for my hardware, and developed two custom...
Friday, 25 January 2013 - 22:07
Atmega128RFA1 Ground Pins
Are the different ground pins on the Atmega128RFA1 connected internally? More to the point, if I have two different grounds on my board (AGND and DGND), and tie them, respectively...
Friday, 26 October 2012 - 17:48
Component and IDE Choices
Let me preface this by saying while I have a reasonable amount of experience with AVR controllers, I have absolutely zero wireless radio development experience. I am starting a...
Thursday, 11 October 2012 - 19:12
USB to RS-232 Converter
I have read in a number of places that "cheap" USB to RS-232 cables will not work properly with AVRs. Does anyone have a good recommendation as to what I should buy? I am...
Monday, 21 May 2012 - 03:42
Rude Interruptions (Interrupts and SPI)
I configure my mega as a master on the SPI bus with the following code (DDR_SPI, DD_MOSI, DD_SCK are defined as the appropriate pins elsewhere): void spiMasterInit(uint8_t...
Tuesday, 24 April 2012 - 16:41
Weird [optimization?] problem
Disclaimer: I apologize if this is in the wrong forum; it appears to be a compiler optimization issue, so I am placing it here. Mods, feel free to move it if you disagree. I am...
Wednesday, 11 April 2012 - 02:18
MAC/PHY Chip Options
I have done a number of designs using the ENC28J60, and am fairly happy with the results. However, some of its limitations are starting to become annoying (specifically its...
Saturday, 25 February 2012 - 14:10
Weird Frequency Comb Noise on PCB
I have a PCB that is exhibiting a weird comb frequency noise spectrum. The microcontroller on the board is clocked by an external crystal. The crystal is an ECS product with a...
Sunday, 12 February 2012 - 18:47
AVR-LIBC Website
Is anyone else having problems accessing the avr-libc website (http://www.nongnu.org/avr-libc/user-manual/? I can get the page itself to load (sometimes), but when I try to push...
Wednesday, 19 October 2011 - 15:58
Code Execution Time Question
Preface: I program in C, and am not at all familiar with assembly. That may be part of my problem here. Specifics: MCU: ATMEGA1281 Compiler: avr-gcc IDE: AVR Studio 4.18, build...
Monday, 19 September 2011 - 18:59
Timers: CTC, interrupts, and OCOx state
I would like to use the Output Compare pins of my AVR to generate a clock to talk to another component. To do this, I plan on configuring the counter to toggle the pin...
Wednesday, 31 August 2011 - 16:24
Communication with AD7924
Does anyone have any experience working with the AD7924 ADC? I am using a software SPI interface to talk to them, and seeing a unexpected results when actual voltages are present...
Tuesday, 30 August 2011 - 19:51

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