Diff: mbed-dev/targets/TARGET_ARM_SSG/TARGET_BEETLE/device/system_CMSDK_BEETLE.c

Revision:

18:6a4db94011d3

diff -r f713758f6238 -r 6a4db94011d3 mbed-dev/targets/TARGET_ARM_SSG/TARGET_BEETLE/device/system_CMSDK_BEETLE.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-dev/targets/TARGET_ARM_SSG/TARGET_BEETLE/device/system_CMSDK_BEETLE.c	Sun May 14 23:18:57 2017 +0000
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2009-2016 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.
+ */
+/*
+ * This file is derivative of CMSIS V5.00 system_ARMCM3.c
+ */
+
+#include "cmsis.h"
+
+/*----------------------------------------------------------------------------
+ * Define clocks
+ *----------------------------------------------------------------------------*/
+#define __XTAL (48000000UL) /* Oscillator frequency */
+
+#define __SYSTEM_CLOCK (__XTAL / 2)
+
+/*----------------------------------------------------------------------------
+ * Clock Variable definitions
+ *----------------------------------------------------------------------------*/
+/* !< System Clock Frequency (Core Clock) */
+uint32_t SystemCoreClock = __SYSTEM_CLOCK;
+
+/*----------------------------------------------------------------------------
+ * Clock functions
+ *----------------------------------------------------------------------------*/
+/**
+ * Update SystemCoreClock variable
+ *
+ * @param  none
+ * @return none
+ *
+ * @brief   Updates the SystemCoreClock with current core Clock
+ *          retrieved from cpu registers.
+ */
+void SystemCoreClockUpdate (void)
+{
+
+    SystemCoreClock = __SYSTEM_CLOCK;
+
+}
+
+/**
+ * Initialize the system
+ *
+ * @param  none
+ * @return none
+ *
+ * @brief  Setup the microcontroller system.
+ *         Initialize the System.
+ */
+void SystemInit (void)
+{
+
+#ifdef UNALIGNED_SUPPORT_DISABLE
+    SCB->CCR |= SCB_CCR_UNALIGN_TRP_Msk;
+#endif
+
+    SystemCoreClock = __SYSTEM_CLOCK;
+
+    // Enable AHB and APB clock
+    /* GPIO */
+    CMSDK_SYSCON->AHBCLKCFG0SET = 0xF;
+    /*
+     * Activate clock for: I2C1, SPI1, SPIO, QUADSPI, WDOG,
+     * I2C0, UART0, UART1, TIMER0, TIMER1, DUAL TIMER, TRNG
+     */
+    CMSDK_SYSCON->APBCLKCFG0SET = SYSTEM_CORE_TIMER0
+                            | SYSTEM_CORE_TIMER1
+                            | SYSTEM_CORE_DUALTIMER0
+                            | SYSTEM_CORE_UART0
+                            | SYSTEM_CORE_UART1
+                            | SYSTEM_CORE_I2C0
+                            | SYSTEM_CORE_WDOG
+                            | SYSTEM_CORE_QSPI
+                            | SYSTEM_CORE_SPI0
+                            | SYSTEM_CORE_SPI1
+                            | SYSTEM_CORE_I2C1
+                            | SYSTEM_CORE_TRNG;
+    /* Beetle System Core Config */
+    SystemCoreConfig();
+}