NVIC - first time set old vectors to flash vector address

Author: 0xc0170

source/cmsis_nvic.c

@@ -43,8 +43,8 @@ void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector)
     uint32_t i;
 
     /* Copy and switch to dynamic vectors if the first time called */
-    if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
-        uint32_t *old_vectors = vectors;
+    if (SCB->VTOR != NVIC_RAM_VECTOR_ADDRESS) {
+        uint32_t *old_vectors = (uint32_t *) NVIC_FLASH_VECTOR_ADDRESS;
         vectors = (uint32_t *) NVIC_RAM_VECTOR_ADDRESS;
         for (i = 0; i < NVIC_NUM_VECTORS; i++) {
             vectors[i] = old_vectors[i];