Add support for W48 (H2004064)

gpio/wiegand/README.md

@@ -47,6 +47,10 @@ This is a 26-bit format used by many readers. The first bit is an even parity bi
 
 This is similar to W26, but without the leading and trailing parity bits. The first 8 bits are the facility code. The next 16 bits are the card number. The application will display the facility code and card number.
 
+## W48: 48-bit Wiegand
+
+This is HID 48 bit Corporate 1000 - H2004064 format.  The first bit is odd parity 2 (based on bits 2-48).  The next bit is even parity (based on 4-5,7-8,10-11,...,46-47).  Then 22 bit company code.  Then 23 bit card id. Then odd parity 1 (based on 3-4,6-7,9-10,...,45-46).  
+
 ## W32/W34/W37/W40: 32/34/37/40-bit Wiegand
 
 These formats are not very standardized, so the application will not try to interpret the data. You can modify the wiegand_data.c file to add your own interpretation.

gpio/wiegand/scenes/wiegand_data.c

@@ -120,6 +120,33 @@ void wiegand_add_info_24bit(FuriString* buffer) {
     furi_string_cat_printf(buffer, " (%ld)", dec);
 }
 
+void wiegand_add_info_48bit(FuriString* buffer) {
+    // We assume this is HID 48 bit Corporate 1000 - H2004064 format.
+    // The first bit is odd parity 2 (based on bits 2-48).
+    // The next bit is even parity (based on 4-5,7-8,10-11,...,46-47).
+    // Then 22 bit company code.
+    // Then 23 bit card id.
+    /// Then odd parity 1 (based on 3-4,6-7,9-10,...,45-46).
+
+    // 22 bits company code (bits 3-24; data[2..23])
+    uint32_t code = 0;
+    for(int i = 2; i <= 23; i++) {
+        code = code << 1;
+        code |= data[i] ? 1 : 0;
+    }
+    furi_string_cat_printf(buffer, "\nCompany: %lX (%ld)", code, code);
+
+    // 23 bit card id (bits 25-47; data[24..46]).
+    code = 0;
+    for(int i = 24; i <= 46; i++) {
+        code = code << 1;
+        code |= data[i] ? 1 : 0;
+    }
+    furi_string_cat_printf(buffer, "\nCard: %lX (%ld)", code, code);
+
+    // TODO: Add the 3 parity checks.
+}
+
 void wiegand_add_info(FuriString* buffer) {
     furi_string_push_back(buffer, '\n');
     if(bit_count == 4 || bit_count == 8) {
@@ -128,6 +155,8 @@ void wiegand_add_info(FuriString* buffer) {
         wiegand_add_info_26bit(buffer);
     } else if(bit_count == 24) {
         wiegand_add_info_24bit(buffer);
+    } else if(bit_count == 48) {
+        wiegand_add_info_48bit(buffer);
     }
     furi_string_push_back(buffer, '\n');
 }

gpio/wiegand/scenes/wiegand_read.c

@@ -68,7 +68,8 @@ void wiegand_timer_callback(void* context) {
     FURI_CRITICAL_ENTER();
     if(duration > 25 * one_millisecond) {
         if(bit_count == 4 || bit_count == 8 || bit_count == 24 || bit_count == 26 ||
-           bit_count == 32 || bit_count == 34 || bit_count == 37 || bit_count == 40) {
+           bit_count == 32 || bit_count == 34 || bit_count == 37 || bit_count == 40 ||
+           bit_count == 48) {
             wiegand_stop_read(app);
             scene_manager_next_scene(app->scene_manager, WiegandDataScene);
         } else {

gpio/wiegand/wiegand.h

@@ -18,7 +18,7 @@ extern const GpioPin* const pinD0mosfet;
 extern const GpioPin* const pinD1;
 extern const GpioPin* const pinD1mosfet;
 extern volatile int bit_count;
-#define MAX_BITS 42
+#define MAX_BITS 48
 extern volatile bool data[];
 extern volatile uint32_t data_fall[];
 extern volatile uint32_t data_rise[];