1 files changed, 54 insertions, 0 deletions
diff --git a/src/calculator.cpp b/src/calculator.cpp
new file mode 100644
index 0000000..5de706b
--- /dev/null
+++ b/src/calculator.cpp
@@ -0,0 +1,54 @@
+#include <new>
+#include <string>
+#include <array>
+#include "hardware/i2c.h"
+#include "pico/time.h"
+#include "LCD_I2C.hpp"
+#include "keypad.hpp"
+#include "include/calculator.hpp"
+#include "include/tokenizer.hpp"
+
+
+Calculator::Calculator() {
+  display = new LCD_I2C(I2C_ADDRESS, LCD_COLUMNS, LCD_ROWS,
+			PICO_DEFAULT_I2C_INSTANCE,
+			PICO_DEFAULT_I2C_SDA_PIN,
+			PICO_DEFAULT_I2C_SCL_PIN);
+  default_keypad = new Keypad(keypad_row_pins, keypad_col_pins,
+				default_keypad_chars);
+  display->BacklightOn();
+}
+
+Calculator::~Calculator() {
+  delete display;
+  delete default_keypad;
+}
+
+void Calculator::run() {
+  while(true) {
+    display->Clear();
+    std::string input;
+    short str_len = 0;
+    char pressed_key = default_keypad->getKey();
+    
+    if(pressed_key == '\0')
+      continue;
+
+    while(str_len <= 15) {
+      pressed_key = default_keypad->getKey();
+
+      if(pressed_key != '\0' && pressed_key != '=') {
+	display->PrintChar(pressed_key);
+	input += pressed_key;
+	str_len += 1;
+      }
+
+      if(pressed_key == '=') {
+	std::array tokens = tokenizer.tokenize(input);
+	break;
+      }
+
+      busy_wait_ms(170);
+    }
+  }
+}