battery capacity check

电池电量与电压映射关系的建立

   

unsigned int const  bat_capacity_table[TABLE_SIZE][2]=

{

  {4150, 100}, {4100, 96},
  {4050, 92}, {4020, 88},
  {3980, 83}, {3950, 79},
  {3920, 75}, {3900, 71},
  {3860, 67}, {3830, 63},
  {3810, 58}, {3770, 50},
  {3750, 42}, {3720, 33},
  {3700, 25}, {3640, 17},
  {3580, 8}, {3000, 0},

}   

 

unsigned int charger_check_voltage(uint16 bat_voltage)

{

   uint16 voltage_level = 0;

   uint16 index = 0;

 

   for(index = 0;index < TABLE_SIZE - 1;index++)

   {

      if(bat_voltage <= bat_capacity_table[index][0] &&

          (bat_voltage > bat_capacity_table[index+1][0]))

       {

            voltage_level = bat_capacity_table[index+1][1]+

                (bat_voltage-bat_capacity_table[index+1][0])/

                (bat_capacity_table[index][0]-bat_capacity_table[index+1][0])*

                (bat_capacity_table[index][1]-bat_capacity_table[index+1][1]);

            break;

        }

   }

   if(bat_voltage <= bat_capacity_table[TABLE_SIZE-1][0])

   {

        voltage_level = bat_capacity_table[TABLE_SIZE-1][0]);

    }

   

   if(bat_voltage >= bat_capacity_table[0][0])

   {

        voltage_level = bat_capacity_table[0][0]);

    }

    return voltage_level;

}