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how to deal with multiple SPI connections on one AVR?
Hi - I'm running into an annoying problem. I'm working on a system that uses SPI for communication between each module. There is one SPI master, and many slaves (about 10 or so at...
Sunday, 7 August 2005 - 20:30
good method for data logging?
Hi - I'm working on a system that I'd like to be able to do on-board data logging with. So - I'm looking for a way to be able to write maybe at about 10KB/s max (probabaly less...
Thursday, 4 August 2005 - 00:48
what is the impedance of the ADC inputs on a M48?
Hi - I couldn't find this in the M48 datasheet - so does anybody know what the impedance of the ADC inputs is? (IE PORTC bits 0-5) thanks!
Sunday, 24 July 2005 - 17:52
solution for fast bi-directional communication?
Hi - I'm working on a system that will have a sort of "master" AVR, and then a number of "slaves" - at least 6, probabaly more eventually. The slaves only need to be able to...
Monday, 11 July 2005 - 07:40
how to measure power consumed by servo?
Hi - I want to monitor the amount of power a servo is consuming. My idea was to put a very small resistor in series with the ground connection to the servo. Then, I'd use an op-...
Saturday, 9 July 2005 - 23:18
Question regarding use of ADC
Hi - I was wondering, when using the ADC, does it matter what the ADC pins are set to? I mean do they have to be set as inputs, or does enabling the ADC and setting the mux to a...
Saturday, 9 July 2005 - 06:30
can all IO pins be used on ATMEGA162?
Hi - I just wanted to be sure before I do anything silly - can all 35 IO pins on an ATMEGA162 be used? Specifically - I wanted to use the two UART pins for the UART, and the rest...
Wednesday, 6 July 2005 - 07:17
Can SPI master send data to multiple slaves at same time?
Hi - I was wondering - is it possible for one AVR acting as an SPI master to send the same data to multiple AVRs acting as SPI slaves at the same time? Thanks!
Wednesday, 29 June 2005 - 05:11
spot the mistake in my SPI code (very simple)
Hi - I'm trying to establish very basic SPI communication between to ATMEGA48s with 20Mhz crystals. I program them with an AVRISP - so I have 1K resistors inline between their SPI...
Sunday, 26 June 2005 - 05:16
Eagle AVR library?
Hi - I'm just curious - for those of you that use Eagle, what library are you using for AVRs? From what I can tell - all of those on the Atmel site are very outdated and...
Thursday, 23 June 2005 - 23:14
best communication method (between uCs) for new system?
Hi - I'm working on a system that will have maybe 3 or so UCs. They all will be within about 10 cms of each other, though on different boards most likely. There will be sort of a...
Monday, 20 June 2005 - 04:24
how much memory would this struct take up?
If I were to define a struct containing an 18bit bitfield - would it then take up 24 bits? Like if I defined it like this: struct u_int18_t { unsigned i:18; } That would take up...
Sunday, 19 June 2005 - 07:05