So I wanted to to write a program that ask you to choose between two choices. One allows you to enter a fixed number and the other directly takes you in to a loop. I'm asking for guidance on how to do that? especially the decimal part sense the keypad has no decimal. I thought of using one of the keys on the keypad as a dot maybe (* as .) i'm not sure if that can work.
Mod edit: code tags
C:
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#include <Wire.h>
#include <FMTX.h>
float fm_freq; // FM frequency
const byte ROWS = 4;
const byte COLS = 4;
char hexaKeys[ROWS][COLS] = {
{'1', '2', '3', 'A'},
{'4', '5', '6', 'B'},
{'7', '8', '9', 'C'},
{'.', '0', '#', 'D'}
};
byte rowPins[ROWS] = {9, 8, 7, 6};
byte colPins[COLS] = {5, 4, 3, 2};
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);
void setup() {
lcd.begin(16,2);
lcd.backlight();
}
void loop() {
char customKey = customKeypad.getKey();
lcd.setCursor(0, 0);
lcd.print("Press A For Loop Freq");
lcd.setCursor(0, 1);
lcd.print("B set your own Freq");
if (customKey = "A") {
fmtx_init(fm_freq, USA);
//lcd.begin(16, 2);
//lcd.backlight();// Turn on Lcd backlight
//lcd.noBacklight();// Turn off Lcd backlight
lcd.setCursor(0, 1);
lcd.print("FM freq: ");
lcd.setCursor(10, 1);
lcd.print(fm_freq, 1); //print the freq on the lcd with
} else if (customKey = "B" )
{
//The loop.....
}
}
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