Import Mbed OS hard-float snapshot

targets/TARGET_NUVOTON/TARGET_M261/device/system_M261.c

@@ -0,0 +1,134 @@
+/**************************************************************************//**
+ * @file     system_M261.c
+ * @version  V2.00
+ * @brief    System Setting Source File
+ *
+ * @note
+ * Copyright (c) 2019-2020 Nuvoton Technology Corporation
+ * 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 <stdio.h>
+#include <stdint.h>
+#include "NuMicro.h"
+
+
+
+#if defined(__ICCARM__)
+extern void *__vector_table;                   /* see startup file */
+#else
+extern void *__vector_handlers;                   /* see startup file */
+#endif
+
+
+/*----------------------------------------------------------------------------
+  Clock Variable definitions
+ *----------------------------------------------------------------------------*/
+uint32_t SystemCoreClock  = __HSI;              /*!< System Clock Frequency (Core Clock) */
+uint32_t CyclesPerUs      = (__HSI / 1000000);  /*!< Cycles per micro second             */
+uint32_t PllClock         = __HSI;              /*!< PLL Output Clock Frequency          */
+const uint32_t gau32ClkSrcTbl[] = {__HXT, __LXT, NULL, __LIRC, NULL, NULL, NULL, __HIRC};
+
+
+/**
+ * @brief    Update the Variable SystemCoreClock
+ *
+ * @param    None
+ *
+ * @return   None
+ *
+ * @details  This function is used to update the variable SystemCoreClock
+ *           and must be called whenever the core clock is changed.
+ */
+void SystemCoreClockUpdate(void)
+{
+    /* Update PLL Clock */
+    PllClock = CLK_GetPLLClockFreq();
+
+    /* Update System Core Clock */
+    SystemCoreClock = CLK_GetCPUFreq();
+
+    /* Update Cycles per micro second */    
+    CyclesPerUs = (SystemCoreClock + 500000) / 1000000; 
+}
+
+
+
+/**
+ * @brief    System Initialization
+ *
+ * @param    None
+ *
+ * @return   None
+ *
+ * @details  The necessary initialization of system. Global variables are forbidden here.
+ */
+void SystemInit(void)
+{
+
+#if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U)
+#if defined(__ICCARM__)
+    SCB->VTOR = (uint32_t) &__vector_table;
+#else
+    SCB->VTOR = (uint32_t) &__vector_handlers;
+#endif
+#endif
+    
+#ifdef INIT_SYSCLK_AT_BOOTING
+
+#endif
+
+}
+
+
+#if USE_ASSERT
+
+/**
+ * @brief      Assert Error Message
+ *
+ * @param[in]  file  the source file name
+ * @param[in]  line  line number
+ *
+ * @return     None
+ *
+ * @details    The function prints the source file name and line number where
+ *             the ASSERT_PARAM() error occurs, and then stops in an infinite loop.
+ */
+void AssertError(uint8_t * file, uint32_t line)
+{
+
+    printf("[%s] line %d : wrong parameters.\r\n", file, line);
+
+    /* Infinite loop */
+    while(1) ;
+}
+#endif
+
+/* Return LR (return address)
+ *
+ * Replace BSP assembly implementation with toolchain built-in (borrow MBED_CALLER_ADDR())
+ */
+uint32_t __PC(void)
+{
+#if (defined(__GNUC__) || defined(__clang__)) && !defined(__CC_ARM)
+    return (uint32_t) __builtin_extract_return_addr(__builtin_return_address(0));
+#elif defined(__CC_ARM)
+    return (uint32_t) __builtin_return_address(0);
+#elif defined(__ICCARM__)
+    return (uint32_t) __get_LR();
+#else
+    #error("__PC() not implemented")
+#endif
+}