microcontroller

I've heard about people using light sensors, geiger counters, and other physical sensors to generate random numbers, but I'm skeptical. Is there really a way to generate random numbers from taking measurements of the physical world (using an Arduino or any other microcontroller)? If so, would these numbers ever be really random? to clarify: the question is about the feasibility of using microcontroller-gathered data to generate random numbers that could be applied soundly to cryptography-- an alternative to relying on a device's entropy. Taking analog "real world" measurements usually is a

Although there are plenty of unit test frameworks that support C, I'm a little stumped on how to write unit tests for micro controller code (PIC in my case, but I think the question is more general than that). Much of the code written for micro controllers revolves around Writing configuration and data values to registers, reading incoming data from registers and responding to interrupt events. I'm wondering if anyone can provide some pointers on the most effective way to this. You write; "Much of the code written for micro controllers revolves around Writing configuration and data values to

I am really having hard time understanding the difference. Some say they are same, while others say there is a slight difference. What's the difference, exactly? I would like it if you explained with some analogy. Bits per second is straightforward. It is exactly what it sounds like. If I have 1000 bits and am sending them at 1000 bps, it will take exactly one second to transmit them. Baud is symbols per second. If these symbols — the indivisible elements of your data encoding — are not bits, the baud rate will be lower than the bit rate by the factor of bits per symbol. That is, if there are

I am having a problem in calculating delays. I want to make a delay for 1 sec when I am using 1MHz clock speed for my atmega128 microcontroller. I use proteus for simulation and avr studio for coding in assembly for atmel microcontroller. For example this code is for 8MHz clock microcontroller Delay_15mS: ; For CLK(CPU) = 8 MHz LDI dly1, 120 ; One clock cycle; Delay1: LDI dly2, 250 ; One clock cycle Delay2: DEC dly2 ; One clock cycle NOP ; One clock cycle BRNE Delay2 ; Two clock cycles for true 1 clock for false DEC dly1 ; One clock Cycle BRNE Delay1 ; Two clock cycles for true 1 clock for

It seems that any kind of graphic library like DirectFB or MiniGui requires some sort of underlying operation system like Linux or uClinux. I am challenged with writing a software for a micro controller with just 512kb flash, an LCD display and a touchscreen to display and handle some pictures and GUI parts. Do you know any library which just need a pointer to the video memory that also can handle lines, images and fonts? By the time you incorporate some third party solution you could have just written it yourself. For most if not all environments the screen is just a two dimensional array of

I'm running code on a microcontroller with .NET Micro Framework , and I want my debug output to write to a text file. How does this work? Ekk Use Trace . It is designed to do what you need. using System; using System.Diagnostics; class Test { static void Main() { Trace.Listeners.Add(new TextWriterTraceListener("yourlog.log")); Trace.AutoFlush = true; Trace.Indent(); Trace.WriteLine("Entering Main"); Console.WriteLine("Hello World."); Trace.WriteLine("Exiting Main"); Trace.Unindent(); Trace.Flush(); } } The most flexible solution for using a out-of-the-box tracing is to make an application