Can anyone help me with a program code for 8051 microprocessor (Embedded C language)?

Question by : Can anyone help me with a program code for 8051 microprocessor (Embedded C language)?
I’m making an Automatic Street-Light Controller, wherein, the microprocessor is used to switch on/off the light. It’s constructed using an LDR, which detects presence or absence of light. Now, the Microprocessor is supposed to sense if the LDR is in saturation or cut-off and accordingly manipulate the light. If the transistor(at its input) is in cut-off, there is no light, so the output of the microprocessor should be such that the LED at its output, begins to glow. Similarly, for the transistor in saturation, the LED should be put off. The transistor is at the input of the microprocessor, and the LEDs are at the output. Kindly help me with this simple code in Embedded C language.

Best answer:

Answer by Jonathan
All you need to do is read the input pin that senses the LDR condition and drive the output pin, accordingly. You don’t mention which c compiler you are using. But it is usually either SDCC or else Keil (ARM) when talking about the 8051 microcontroller. But I’d need to know the input pin and the output pin and probably some more detail about the LDR circuit as well as how the LED itself is wired up to be much more help than this. In short, though, it sounds like a very short bit of code that sits in a for(;;) loop reading the input pin and either driving the output pin to the same value it reads or else the inverted value it reads. Which amounts to only a couple of lines in the body of the for(;;) loop.

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Best answer:

Answer by Sean L
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