Hi,

Good afternoon. i have several issues that i am in
doubt.

1. what is embedded system? what is the difference
between a normal electronic system with a uC, with an
embedded system?

2. i am used to programming pic16F84 and 68hc11. the
procedure is like this. key in the assembly in an
editor, them assemble them to hex file, then download
them to the uC. that's it. the uC can be brought
everywhere and still function the same.

My question is, why people are telling me that i need
a RTOS ( Real Time Operating System ) to develop an
embedded system? They are telling me that drivers need
to be written, so on and so forth. Why?
What role does the RTOS play?

i don't get it, cause i am still looking things at the
binary level.

3. Another issue is the driver issue. When someone
told me that driver need to be written for certain
embedded component, i start to go blank. how should i
start?
Another senior engineer told me that i have actually
been writing drivers without knowing it. really?

Can anyone please enlighten me?

thanks a lot

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