From 5078a194aaa2d9761659aebc33d33b4a5375cac2 Mon Sep 17 00:00:00 2001
From: Incursio Hack - Ruan Rocha
 <114836217+IncursioHack@users.noreply.github.com>
Date: Thu, 9 May 2024 18:02:58 -0300
Subject: [PATCH] Inclusion of the RF433R and the Spectrum option.

On Spectrum it is possible to visualize the signal wave, this code was adapted for Cardputer and was based on the @aat440hz project.
---
 src/main.cpp |  5 ++--
 src/rf.cpp   | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/rf.h     | 16 +++++++++++
 3 files changed, 98 insertions(+), 2 deletions(-)
 create mode 100644 src/rf.cpp
 create mode 100644 src/rf.h

diff --git a/src/main.cpp b/src/main.cpp
index a2697cac2..26056a775 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -47,6 +47,7 @@ TFT_eSprite draw = TFT_eSprite(&tft);
 #include "evil_portal.h"
 #include "clients.h"
 #include "arp.h"
+#include "rf.h"
 
 
 #ifdef CARDPUTER
@@ -200,7 +201,7 @@ void loop() {
           options = {
             {"Scan/copy", [=]()   { displayRedStripe("Scan/Copy"); }},
             {"Replay", [=]()      { displayRedStripe("Replay"); }},
-            {"Spectrum", [=]()    { displayRedStripe("Spectrum"); }},
+            {"Spectrum", [=]()    { rf_spectrum(); }}, //@IncursioHack
             {"Main Menu", [=]()   { backToMenu(); }},
           };
           delay(200);
@@ -209,7 +210,7 @@ void loop() {
           break;
         case 3: // RFID
           options = {
-            {"Scan/copy", [=]()   { rfid_setup(); }},
+            {"Scan/copy", [=]()   { rfid_setup(); }}, //@IncursioHack
             {"Replay", [=]()      { displayRedStripe("Replay"); }},
             {"Main Menu", [=]()   { backToMenu(); }},
           };
diff --git a/src/rf.cpp b/src/rf.cpp
new file mode 100644
index 000000000..23c8b5620
--- /dev/null
+++ b/src/rf.cpp
@@ -0,0 +1,79 @@
+//@IncursioHack - github.com/IncursioHack
+
+#include "rf.h"
+#include "globals.h"
+#include "mykeyboard.h"
+#include "display.h"
+#include "PCA9554.h"
+#include "sd_functions.h"
+#include <driver/rmt.h>
+
+// Cria um objeto PCA9554 com o endereço I2C do PCA9554PW
+// PCA9554 extIo1(pca9554pw_address);
+
+#define RMT_RX_CHANNEL  RMT_CHANNEL_6
+#define RMT_BLOCK_NUM   1
+
+#define RMT_CLK_DIV   80 /*!< RMT counter clock divider */
+#define RMT_1US_TICKS (80000000 / RMT_CLK_DIV / 1000000)
+#define RMT_1MS_TICKS (RMT_1US_TICKS * 1000)
+
+#define SIGNAL_STRENGTH_THRESHOLD 1500 // Adjust this threshold as needed
+
+#define DISPLAY_HEIGHT 130 // Height of the display area for the waveform
+#define DISPLAY_WIDTH  240 // Width of the display area
+#define LINE_WIDTH 2 // Adjust line width as needed
+
+void initRMT() {
+    rmt_config_t rxconfig;
+    rxconfig.rmt_mode            = RMT_MODE_RX;
+    rxconfig.channel             = RMT_RX_CHANNEL;
+    rxconfig.gpio_num            = gpio_num_t(GROVE_SCL);
+    rxconfig.mem_block_num       = RMT_BLOCK_NUM;
+    rxconfig.clk_div             = RMT_CLK_DIV;
+    rxconfig.rx_config.filter_en = true;
+    rxconfig.rx_config.filter_ticks_thresh = 200 * RMT_1US_TICKS;
+    rxconfig.rx_config.idle_threshold = 3 * RMT_1MS_TICKS;
+
+    ESP_ERROR_CHECK(rmt_config(&rxconfig));
+    ESP_ERROR_CHECK(rmt_driver_install(rxconfig.channel, 2048, 0));
+}
+
+void rf_spectrum() { //@IncursioHack - https://github.com/IncursioHack ----thanks @aat440hz - RF433ANY-M5Cardputer
+
+    tft.fillScreen(TFT_BLACK);
+    tft.setTextSize(1);
+    tft.println("");    
+    tft.println("  RF433 - Spectrum");
+    pinMode(GROVE_SCL, INPUT);
+    initRMT();
+
+        RingbufHandle_t rb = nullptr;
+        rmt_get_ringbuf_handle(RMT_RX_CHANNEL, &rb);
+        rmt_rx_start(RMT_RX_CHANNEL, true);
+        while (rb) {
+            size_t rx_size = 0;
+            rmt_item32_t* item = (rmt_item32_t*)xRingbufferReceive(rb, &rx_size, 500);
+            if (item != nullptr) {
+                if (rx_size != 0) {
+                    // Clear the display area
+                    tft.fillRect(0, 20, DISPLAY_WIDTH, DISPLAY_HEIGHT, TFT_BLACK);
+                    // Draw waveform based on signal strength
+                    for (size_t i = 0; i < rx_size; i++) {
+                        int lineHeight = map(item[i].duration0 + item[i].duration1, 0, SIGNAL_STRENGTH_THRESHOLD, 0, DISPLAY_HEIGHT/2);
+                        int lineX = map(i, 0, rx_size - 1, 0, DISPLAY_WIDTH - 1); // Map i to within the display width
+                        // Ensure drawing coordinates stay within the box bounds
+                        int startY = constrain(20 + DISPLAY_HEIGHT / 2 - lineHeight / 2, 20, 20 + DISPLAY_HEIGHT);
+                        int endY = constrain(20 + DISPLAY_HEIGHT / 2 + lineHeight / 2, 20, 20 + DISPLAY_HEIGHT);
+                        tft.drawLine(lineX, startY, lineX, endY, TFT_PURPLE);
+                    }
+                }
+                vRingbufferReturnItem(rb, (void*)item);
+            }
+        }
+            // Checks para sair do while
+        
+    rmt_rx_stop(RMT_RX_CHANNEL);
+    delay(10);
+
+}
\ No newline at end of file
diff --git a/src/rf.h b/src/rf.h
new file mode 100644
index 000000000..0868311df
--- /dev/null
+++ b/src/rf.h
@@ -0,0 +1,16 @@
+// @IncursioHack - https://github.com/IncursioHack
+#include <Wire.h>
+#include <SD.h>
+#include "PCA9554.h" // Biblioteca para PCA9554
+
+// Define o endereço I2C do PCA9554PW
+const int pca9554pw_address = 0x27;
+
+// Cria um objeto PCA9554 com o endereço I2C do PCA9554PW
+extern PCA9554 extIo1;
+
+// Define os pinos para o receptor e transmissor
+const int PCA9554RSX_PIN = 4;
+const int PCA9554TRX_PIN = 0;
+
+void rf_spectrum();
\ No newline at end of file