Diff: mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F429xI/device/system_init_pre.c

Revision:

0:bb348c97df44

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F429xI/device/system_init_pre.c	Wed Sep 16 01:11:49 2020 +0000
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2015-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "stm32f4xx.h"
+#include "nvic_addr.h"
+
+/*!< Uncomment the following line if you need to relocate your vector Table in
+     Internal SRAM. */
+/* note: if uVisor is present the definition must go in system_init_pre.c */
+/* #define VECT_TAB_SRAM */
+#define VECT_TAB_OFFSET  0x00 /*!< Vector Table base offset field.
+                                   This value must be a multiple of 0x200. */
+
+/* this function is needed to peform hardware initialization that must happen
+ * before the uVisor; the whole SystemInit function for the STM32F4 cannot be
+ * put here as it depends on some APIs that need uVisor to be enabled */
+void SystemInitPre(void)
+{
+    /* FPU settings ------------------------------------------------------------*/
+#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
+    SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2));  /* set CP10 and CP11 Full Access */
+#endif
+
+    /* Configure the Vector Table location add offset address ------------------*/
+#ifdef VECT_TAB_SRAM
+    SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
+#else
+  SCB->VTOR = NVIC_FLASH_VECTOR_ADDRESS; /* Vector Table Relocation in Internal FLASH */
+#endif
+}