From 7e4cfad53699fabbecb6696508e5addcffc1b095 Mon Sep 17 00:00:00 2001
From: krolyxon <me@krolyxon.com>
Date: Sat, 20 Jun 2026 00:24:34 +0530
Subject: restructure to use rust source tree primarily

---
 src-arduino/nfc/nfc.cpp | 104 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 src-arduino/nfc/nfc.cpp

(limited to 'src-arduino/nfc/nfc.cpp')

diff --git a/src-arduino/nfc/nfc.cpp b/src-arduino/nfc/nfc.cpp
new file mode 100644
index 0000000..a18f47b
--- /dev/null
+++ b/src-arduino/nfc/nfc.cpp
@@ -0,0 +1,104 @@
+#include "nfc.h"
+
+#include <Adafruit_PN532.h>
+#include <Arduino.h>
+#include <Wire.h>
+
+#include "config.h"
+#include "utils/buttons.h"
+#include "ui/display.h"
+
+#define PN532_IRQ -1
+#define PN532_RESET -1
+
+// Adafruit_PN532 nfc(Wire);
+Adafruit_PN532 nfc(PN532_IRQ, PN532_RESET, &Wire);
+
+void drawWaiting() {
+    u8g2.clearBuffer();
+
+    u8g2.drawStr(10, 20, "PN532 Ready");
+    u8g2.drawStr(10, 40, "Tap NFC Card");
+
+    u8g2.sendBuffer();
+}
+
+void showUID(uint8_t *uid, uint8_t uidLength) {
+    char line[64];
+
+    String uidStr = "";
+
+    for (int i = 0; i < uidLength; i++) {
+        if (uid[i] < 0x10)
+            uidStr += "0";
+
+        uidStr += String(uid[i], HEX);
+        uidStr += " ";
+    }
+
+    uidStr.toUpperCase();
+
+    u8g2.clearBuffer();
+
+    u8g2.drawStr(0, 15, "Card Detected");
+
+    snprintf(line, sizeof(line), "UID:");
+
+    u8g2.drawStr(0, 35, line);
+
+    u8g2.drawStr(0, 50, uidStr.c_str());
+
+    u8g2.sendBuffer();
+}
+
+void pn532_init() {
+    delay(100);
+    nfc.begin();
+    delay(100);
+
+    uint32_t versiondata = nfc.getFirmwareVersion();
+
+    if (!versiondata) {
+        Serial.println("PN532 not found");
+
+        u8g2.clearBuffer();
+        u8g2.drawStr(0, 20, "PN532 NOT FOUND");
+        u8g2.sendBuffer();
+
+        delay(2000);
+        return;
+    }
+
+    Serial.println("PN532 initialized");
+
+    nfc.SAMConfig();
+}
+
+void pn532_scan_loop() {
+    pn532_init();
+
+    drawWaiting();
+
+    while (1) {
+        uint8_t success;
+        uint8_t uid[7];
+        uint8_t uidLength;
+
+        Serial.println("Scanning...");
+        success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid,
+                                          &uidLength, 50);
+
+        if (success) {
+            Serial.println("Card detected");
+
+            showUID(uid, uidLength);
+
+            delay(1000);
+        }
+
+        if (btnBack()) {
+            delay(150);
+            break;
+        }
+    }
+}
-- 
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