Check map to display size

Author: gamblor21

locale/circuitpython.pot

@@ -1458,6 +1458,10 @@ msgstr ""
 msgid "Key must be 16, 24, or 32 bytes long"
 msgstr ""
 
+#: shared-module/is31fl3741/is31fl3741.c
+msgid "LED mappings must match display size"
+msgstr ""
+
 #: py/compile.c
 msgid "LHS of keyword arg must be an id"
 msgstr ""

shared-bindings/is31fl3741/is31fl3741.c

@@ -88,6 +88,9 @@ STATIC mp_obj_t is31fl3741_is31fl3741_make_new(const mp_obj_type_t *type, size_t
 
         self->scale_width = args[ARG_width].u_int / 3;
         self->scale_height = args[ARG_height].u_int / 3;
+    } else {
+        self->scale_width = args[ARG_width].u_int;
+        self->scale_height = args[ARG_height].u_int;
     }
 
     self->auto_gamma = args[ARG_gamma].u_bool;

shared-module/is31fl3741/is31fl3741.c

@@ -59,11 +59,14 @@ void common_hal_is31fl3741_is31fl3741_construct(is31fl3741_is31fl3741_obj_t *sel
     // of the heap as well.
     gc_never_free(self->i2c);
 
-    // TODO mapping should be equal to height * width * 3
     mp_obj_t *items;
     size_t len;
     mp_obj_list_get(mapping, &len, &items);
 
+    if (len != (size_t)(self->scale_width * self->scale_height * 3)) {
+        mp_raise_ValueError(translate("LED mappings must match display size"));
+    }
+
     self->mapping = common_hal_is31fl3741_allocator_impl(sizeof(uint16_t) * len);
     for (size_t i = 0; i < len; i++) {
         mp_int_t value = mp_obj_get_int(items[i]);