rm chance for dynamic allocation during firmware update

2 files changed, 3 insertions, 1 deletions

diff --git a/src/displayapp/screens/FirmwareUpdate.cpp b/src/displayapp/screens/FirmwareUpdate.cpp
index 0a8544b..c20af38 100644
--- a/src/displayapp/screens/FirmwareUpdate.cpp
+++ b/src/displayapp/screens/FirmwareUpdate.cpp
@@ -81,7 +81,8 @@ void FirmwareUpdate::DisplayProgression() const {
   float current = bleController.FirmwareUpdateCurrentBytes() / 1024.0f;
   float total = bleController.FirmwareUpdateTotalBytes() / 1024.0f;
   int16_t pc = (current / total) * 100.0f;
-  lv_label_set_text_fmt(percentLabel, "%d %%", pc);
+  sprintf(percentStr, "%d %%", pc);
+  lv_label_set_text_static(percentLabel, percentStr);
 
   lv_bar_set_value(bar1, pc, LV_ANIM_OFF);
 }
diff --git a/src/displayapp/screens/FirmwareUpdate.h b/src/displayapp/screens/FirmwareUpdate.h
index 5156b7e..a61178c 100644
--- a/src/displayapp/screens/FirmwareUpdate.h
+++ b/src/displayapp/screens/FirmwareUpdate.h
@@ -24,6 +24,7 @@ namespace Pinetime {
         lv_obj_t* bar1;
         lv_obj_t* percentLabel;
         lv_obj_t* titleLabel;
+        mutable char percentStr[10];
 
         States state = States::Idle;