Diff: mbed-dev-master/targets/TARGET_STM/mbed_overrides.c

Revision:

0:bb348c97df44

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-dev-master/targets/TARGET_STM/mbed_overrides.c	Wed Sep 16 01:11:49 2020 +0000
@@ -0,0 +1,58 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2017, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "cmsis.h"
+
+int mbed_sdk_inited = 0;
+
+// This function is called after RAM initialization and before main.
+void mbed_sdk_init()
+{
+#if TARGET_STM32F7
+    // The mbed_sdk_init can be called either during cold boot or during
+    // application boot after bootloader has been executed.
+    // In case the bootloader has already enabled the cache,
+    // is is needed to not enable it again.
+    if ((SCB->CCR & (uint32_t)SCB_CCR_IC_Msk) == 0) { // If ICache is disabled
+        SCB_EnableICache();
+    }
+    if ((SCB->CCR & (uint32_t)SCB_CCR_DC_Msk) == 0) { // If DCache is disabled
+        SCB_EnableDCache();
+    }
+#endif /* TARGET_STM32F7 */
+
+    // Update the SystemCoreClock variable.
+    SystemCoreClockUpdate();
+    HAL_Init();
+
+    /* Configure the System clock source, PLL Multiplier and Divider factors,
+       AHB/APBx prescalers and Flash settings */
+    SetSysClock();
+    SystemCoreClockUpdate();
+
+    mbed_sdk_inited = 1;
+}