convert convert character pointer into floating point

[NIKITA PAWAR]

Hello guys I need to convert convert character pointer into floating point please share the code for it.

 

[user001]

Please describe your question in more detail.
If you want to convert char pointer into floating point, here is a way:

char * p; float f = (float)p;
If you want to convert char into float through pointer, this is the solution:
char * cp; float f; f = *(float *)cp;
If you want to convert char pointer to float pointer, here it is:
char * cp; float * fp = (float *)cp;

 

[NIKITA PAWAR]

Please describe your question in more detail.
If you want to convert char pointer into floating point, here is a way:

char * p; float f = (float)p;
If you want to convert char into float through pointer, this is the solution:
char * cp; float f; f = *(float *)cp;
If you want to convert char pointer to float pointer, here it is:
char * cp; float * fp = (float *)cp;

Thanks for your replay. I've tried this before but didn't work for my project.

 

[NIKITA PAWAR]

Hello guys I need to convert convert character pointer into floating point please share the code for it.

Distance should be convert into a floating number.

#include <Keypad.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const byte ROWS = 4; /* four rows */
const byte COLS = 4; /* four columns */
/* define the symbols on the buttons of the keypads */
char hexaKeys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},             //A - Forward
  {'4', '5', '6', 'B'},             //B - Reverse
  {'7', '8', '9', 'C'},             //* -Start Again
  {'*', '0', '#', 'D'}              //# - Emmergency STOP
};
byte rowPins[ROWS] = {10, 11, 12, 13}; /* connect to the row pinouts of the keypad */
byte colPins[COLS] = {6, 7, 8, 9};

/* initialize an instance of class NewKeypad */
Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);

#define Reset 14
#define sw 2
int isObstaclePin = 3; // pin for sensor input
int motor_RW_control = 4; //reverse direction
int motor_FW_control = 5; //forward direction
int isObstacle = LOW; // HIGH MEANS NO OBSTACLE
static int Gnd_Data = 0, First_Data, Second_Data, Third_Data, Fourth_Data, Fifth_Data, Sixth_Data;
int Reset_state = 0, FSW_state = 0, RSW_state = 0, First_Floor_state = 0, Second_Floor_state = 0, Third_Floor_state = 0, Fourth_Floor_state = 0, Fifth_Floor_state = 0, Sixth_Floor_state = 0;
int count = 0, check_flag, Serial_Data = 0, key_flag = 0, sw_state = 0, test_sw_state = 0, flag_init = 1, FLAG = 1, start = 0;
char Floor, *Distance, key;
static int No_Count, lastread;
int Value, flr_select = 0, Floor_Count, icursor = 0;
char *Emmergency = "EMMERGENCY BUTTON PRESSED";
int EmmergencyLen = strlen(Emmergency);
char *Resetmsg = "RESET BUTTON PRESSED";
int ResetmsgLen = strlen(Resetmsg);

void Init()
{
  while (start == 0)
  {
    sw_state = digitalRead(sw);
    if (sw_state == HIGH)
    {
      while (FLAG == 1)
      {
        Serial.print("Enter the floor count:");
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("floor count: ");
        while (1)
        {
          char customKey = customKeypad.getKey();
          Floor = customKey;
          Serial.print(Floor);
          if (customKey)
          {
            lcd.setCursor(13, 0);
            lcd.print(customKey); delay(150);
          }
          if (Floor > 0)
          {
            break;
          }
          delay(200);
        }
        Serial.print("Enter the distance:");
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("distance:");
        while (1)
        {
          char customKey = customKeypad.getKey();
          Distance = chartoint(customKey);                   //This should be converted into float number
          if (customKey)
          {
            if (customKey == '#')
            {
              lcd.print("mm"); Serial.print("mm"); delay(200);
              FLAG = 0; break;
            }
            Serial.print(customKey);
            lcd.print(customKey);
          }
        }
      }
      Serial.println("\nSelect the Motor Direcion : \n7.UP 8.DOWN");
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("7.UP");
      lcd.setCursor(0, 1);
      lcd.print("8.DOWN");

      while (1)
      {
        char customKey = customKeypad.getKey();
        if (customKey == '7')
        {
          forward_init();
          /****** RESET ******/
          //char *resetmsg = "Press Reset switch for Reset back to ground";
          //int resetlen = strlen(resetmsg);
          while (1)
          {
            Serial.println("Press Reset switch for Reset back to ground ");
            //scroll_display(resetmsg, resetlen);
            Reset_state = digitalRead(Reset);
            if (Reset_state == HIGH)
            {
              Serial.println("RESET BUTTON PRESSED");
              scroll_display(Resetmsg, ResetmsgLen);
              Serial.println("R/W Motor ON");
              reverse_init();
              return;
            }
            delay(350);
          }

            /*char *resetmsg = "Press 8 for Reset back to ground";
            int resetlen = strlen(resetmsg);
            lcd.clear();
            while (1)
            {
            scroll_display(resetmsg, resetlen);
            
            char customKey = customKeypad.getKey();
            if (customKey == '8')
            {
              reverse_init(); start = 1;
              return;
            }
            delay(350);
            }*/
          return;
        }

      }
    }
    if (start == 1)
    {
      break;
    }
  }
}