I need a code for a pic16f877a for a resistance test. It goes like this, the resistance is 4700 ohms. The pic needs to measure the resistor, which needs to have a accuracy of +/- 5. which uses the ADC. this is just one part of this. dose anyone have it in c like sourceboot software.

 

You can't code a project without knowing how the hardware works. Do you have a schematic of the external circuitry to measure resistance? what is the range of resistance?

You mention an accuracy of +/- 5 (ohms?). That is going to determine the number of bits in your A to D, and will have to change if the upper range of resistance is above the stated value.

 

You could charge up a capacitor through the resistor and time how long it takes.