[En-Nut-Discussion] Power Consumption - TCP/IP

[amit khandelwal]

hmm...I will download the latest sources and check out os/tracer.c.
Thanks for the suggestions....

On Apr 5, 2005 2:52 PM, Harald Kipp <harald.kipp at egnite.de> wrote:
> Interesting project and ...
> 
> 
> >the amount of power consumed by one instruction. Any suggestions on
> >how I can get the number of instruction executed....
> 
> ... interesting question. May be Philipp Blum's os/tracer.c
> can help to give a rough estimate.
> 
> 
> >Else the other approach that we have thought is by trying to connect a
> >battery and see for how long it can run....
> 
> On 100 MBit Ethernet, the Ethernet Controller is for sure
> the main energy spender.
> 
> Btw. the origin Ethernut design is not very well suited for
> battery supplies:
> 
> 1. The rectifier bridge costs 1.4 Volts. This can be
> reduced by replacing it with a single Schottky Barrier
> Diode, or, for the adventurers, use no diodes at all.
> 
> 2. The linear regs consume a lot of power. The LM1086
> requires a Vf of 1.2 Volts. There are regs with 0.7 Vf
> (if I remember correctly). But there is still the 5V->3.3V
> regulator. Better use an ATmega128L and run the whole
> board @ 3.3V, 3.6864 MHz. Nut/OS works quite well on
> such a slow system...however, in your case, TinySec might
> be a problem.
> 
> Harald
> 
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