Phase 7: EC11 encoder, life counter views, WS2812B RMT + LEDC buzzer feedback, E2E UI state machine; document build/hardware notes

main/display_manager.c

@@ -155,6 +155,48 @@ void display_put_text_center(int y, const char *str, uint16_t fg, uint16_t bg)
     display_put_text(x, y, str, fg, bg);
 }
 
+void display_draw_big_text(int x, int y, const char *str, int scale, uint16_t fg, uint16_t bg)
+{
+    int cell_w = FONT5X7_W * scale;
+    int cell_h = FONT5X7_H * scale;
+    int num = (int)strlen(str);
+    if (num <= 0) {
+        return;
+    }
+    if (x + num * (cell_w + scale) - scale > DISP_W || y + cell_h > DISP_H) {
+        return;
+    }
+
+    /* Staging buffer for one glyph, scaled */
+    uint16_t *glyph_buf = malloc((size_t)cell_w * cell_h * sizeof(uint16_t));
+    if (glyph_buf == NULL) {
+        return;
+    }
+
+    for (int i = 0; i < num; i++) {
+        char c = str[i];
+        if (c < FONT5X7_FIRST_CHAR || c > FONT5X7_LAST_CHAR) {
+            x += cell_w + scale;
+            continue;
+        }
+        const uint8_t *g = font5x7[c - FONT5X7_FIRST_CHAR];
+
+        for (int gy = 0; gy < FONT5X7_H; gy++) {
+            for (int gx = 0; gx < FONT5X7_W; gx++) {
+                uint16_t color = ((g[gy] >> gx) & 1) ? fg : bg;
+                for (int sy = 0; sy < scale; sy++) {
+                    for (int sx = 0; sx < scale; sx++) {
+                        glyph_buf[(gy * scale + sy) * cell_w + (gx * scale + sx)] = color;
+                    }
+                }
+            }
+        }
+        display_draw_bitmap(x, y, x + cell_w, y + cell_h, glyph_buf);
+        x += cell_w + scale;
+    }
+    free(glyph_buf);
+}
+
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 /*  tjpgd streaming decode                                             */
 /* ------------------------------------------------------------------ */