oled called, not working

my_src/main2.c

@@ -21,6 +21,7 @@
 #include "stm32f1xx_hal.h"
 
 #include "led.h"
+#include "oled.h"
 
 
 
@@ -43,6 +44,8 @@ void my_errorHandler() {
 
 void my_setup_2() {
   blinkInit();
+  LED_P8x16Str(0, 0, "Hallo");
+
 }