add qr scanning indicator

app/error.h

@@ -14,6 +14,8 @@ typedef enum {
   ERR_FULL,
   ERR_VERSION,
   ERR_MISMATCH,
+  ERR_DECODE,
+  ERR_SCAN,
 } app_err_t;
 
 #endif

app/main.c

@@ -22,7 +22,7 @@ APP_DEF_TASK(ui, UI_STACK_SIZE);
 
 #define FW_MAJOR 0
 #define FW_MINOR 6
-#define FW_PATCH 2
+#define FW_PATCH 3
 
 __attribute__((section(".fw_signature"))) __attribute__((__used__)) const uint8_t FW_SIGNATURE[64];
 __attribute__((section(".fw_version"))) __attribute__((__used__)) const uint8_t FW_VERSION[4] = { FW_MAJOR, FW_MINOR, FW_PATCH, 0};

app/qrcode/qrscan.c

@@ -11,18 +11,20 @@
 #include "ur/eip4527_decode.h"
 #include "ur/auth_decode.h"
 
+const static screen_area_t indicator_area = { .x = 10, .y = 10, .width = 10, .height = 10 };
+
 app_err_t qrscan_decode(struct quirc *qrctx, ur_t* ur) {
   struct quirc_code qrcode;
   struct quirc_data *qrdata = (struct quirc_data *)qrctx;
 
   if (quirc_count(qrctx) != 1) {
-    return ERR_RETRY;
+    return ERR_SCAN;
   }
 
   quirc_extract(qrctx, 0, &qrcode);
   quirc_decode_error_t err = quirc_decode(&qrcode, qrdata);
 
-  return !err ? ur_process_part(ur, qrdata->payload, qrdata->payload_len) : ERR_RETRY;
+  return !err ? ur_process_part(ur, qrdata->payload, qrdata->payload_len) : ERR_DECODE;
 }
 
 app_err_t qrscan_deserialize(ur_t* ur) {
@@ -76,6 +78,9 @@ app_err_t qrscan_scan() {
   uint8_t* fb;
 
   while (1) {
+    uint16_t prev_detection = 0;
+    uint16_t detection = TH_COLOR_QR_NOT_FOUND;
+
     if (camera_next_frame(&fb) != HAL_SUCCESS) {
       continue;
     }
@@ -88,7 +93,10 @@ app_err_t qrscan_scan() {
 
     quirc_end(&qrctx);
 
-    if (qrscan_decode(&qrctx, &ur) == ERR_OK) {
+    app_err_t qrerr = qrscan_decode(&qrctx, &ur);
+
+    if (qrerr == ERR_OK) {
+      detection = TH_COLOR_QR_OK;
       hal_inactivity_timer_reset();
       if (qrscan_deserialize(&ur) == ERR_OK) {
         screen_wait();
@@ -96,6 +104,10 @@ app_err_t qrscan_scan() {
       } else {
         ur.crc = 0;
       }
+    } else if (qrerr == ERR_DECODE) {
+      detection = TH_COLOR_QR_NOT_DECODED;
+    } else if (qrerr != ERR_SCAN) {
+      detection = TH_COLOR_QR_OK;
     }
 
     screen_wait();
@@ -105,6 +117,11 @@ app_err_t qrscan_scan() {
       goto end;
     }
 
+    if (detection != prev_detection) {
+      screen_fill_area(&indicator_area, detection);
+      prev_detection = detection;
+    }
+
     keypad_key_t k = ui_wait_keypress(0);
 
     if ((k == KEYPAD_KEY_CANCEL) || (k == KEYPAD_KEY_BACK)) {

app/ui/theme.h

@@ -10,6 +10,9 @@
 #define TH_COLOR_FG SCREEN_COLOR_WHITE
 
 #define TH_COLOR_QR_BG TH_COLOR_BG
+#define TH_COLOR_QR_NOT_FOUND SCREEN_COLOR_RED
+#define TH_COLOR_QR_NOT_DECODED SCREEN_COLOR_ORANGE
+#define TH_COLOR_QR_OK SCREEN_COLOR_GREEN
 
 #define TH_COLOR_MENU_BG TH_COLOR_BG
 #define TH_COLOR_MENU_FG TH_COLOR_FG