不知道程序怎么写 是关于模数转换的程序 急！！！

xin159951411

这是一个要交的作业，之前是英文， 我翻译过来了，不过我还是不确定所以把中英文都放上来。 并且附加了大概的程序结构。 求大神帮我完成下。感激不尽！！！

1.编写一个程序来测量的模拟电压PC0(ADC0)， 使用带有参考电压的ADC外部设备选择模拟电源。使用一个电压源并用ADC0的直流电压记录20个输入电压在0到5伏的测量值。  使用万用表或者示波器来测量实际输入电压V(input). 提供一个表格，表格里包括输入电压的测量值，包括ADC的预期输入电压V（input），记录ADC的值（一个10进制的无符号整数）和记录的ADC电压值得呈现。[backcolor=rgba(255, 255, 255, 0.8)]

1.Write a program to measure the analog voltage on PC0(ADC0) pin using the ADC peripheral
with VREF selected to be AVCC. Using a voltage source apply a DC voltage to ADC0 record
measurements at 20 dierent input voltages between 0 and 5 volts. Use a multimeter or O-
scope to measure the actual input voltage, Vin. Provide a table that includes measured voltage
Vin, expected ADC value for Vin, recorded ADC value (a 10-bit unsigned integer) and voltage
the recorded ADC value represents.

从这开始是程序结构， 希望大家帮我填完。
/*
  Example program
- basic super-loop structure.
- additional timing control, allowing you to call functions once per loop or at a
perscribed rate (e.g. 1kHz, 100Hz, 10Hz 1Hz).
- Makes use of timer0 to generate an ISR every msec.
*/

// Includes
#include <stdint.h>
#include "myRegDefs.h"
#include "myTimer.h"

#define DEBUG_OUTPUT_MESSAGE_MAX_LENGTH 80

// global variables
uint8_t message[DEBUG_OUTPUT_MESSAGE_MAX_LENGTH];

/***********************************************************************************
* Entry point for the program                                                                                       从这开始就可以填写了。
***********************************************************************************/
int main() {

  uint32_t loopCount = 0;

  // must call library init function for register setup related to Arduino library support
  init();

  // Initialize the timer0 peripheral to generate our timebase used for control flow
  InitTimer0Module();

  // Write a message to the serial port once after we power up
  Serial.begin(9600);
  sprintf((char *)message, "Start of program\n");
  Serial.write((char *)message);

  // Endless loop
  while(1)
  {
    // List of stuff that run everytime around the loop
    loopCount++;

    // Functions that run once per msec
    if (run1kHzFunctions())
    {
    }

    // Functions that run once per 10 msec
    if (run100HzFunctions())
    {
    }

    // Functions that run once per 100 msec
    if (run10HzFunctions())
    {
    }

    // Functions that run once per second
    if (run1HzFunctions())
    {
      // run-time debug message
      sprintf((char *)message, "LoopCount = %u\n", loopCount);
      Serial.write((char *)message);
      loopCount = 0;
    }
  } // while(1) loop
  return 0;
}