Diff: targets/cmsis/TARGET_WIZNET/TARGET_W7500x/system_W7500x.c

Revision:

619:034e698bc035

Parent:

558:0880f51c4036

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/cmsis/TARGET_WIZNET/TARGET_W7500x/system_W7500x.c	Fri Sep 04 09:30:10 2015 +0100
@@ -0,0 +1,104 @@
+/**************************************************************************//**
+ * @file     system_CMSDK_CM0.c
+ * @brief    CMSIS Cortex-M0 Device Peripheral Access Layer Source File for
+ *           Device CMSDK
+ * @version  V3.01
+ * @date     06. March 2012
+ *
+ * @note
+ * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
+ *
+ * @par
+ * ARM Limited (ARM) is supplying this software for use with Cortex-M
+ * processor based microcontrollers.  This file can be freely distributed
+ * within development tools that are supporting such ARM based processors.
+ *
+ * @par
+ * THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
+ * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
+ * ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
+ * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
+ *
+ ******************************************************************************/
+
+
+#include "system_W7500x.h"
+
+
+/*----------------------------------------------------------------------------
+  DEFINES
+ *----------------------------------------------------------------------------*/
+//#define SYSCLK_EXTERN_OSC
+
+
+
+/*----------------------------------------------------------------------------
+  Clock Variable definitions
+ *----------------------------------------------------------------------------*/
+uint32_t SystemFrequency = 0;    /*!< System Clock Frequency (Core Clock)  */
+uint32_t SystemCoreClock = 0;    /*!< Processor Clock Frequency            */
+
+
+/*----------------------------------------------------------------------------
+  Clock functions
+ *----------------------------------------------------------------------------*/
+void SystemCoreClockUpdate (void)            /* Get Core Clock Frequency      */
+{
+    uint8_t M,N,OD;
+
+#ifdef SYSCLK_EXTERN_OSC
+    CRG->PLL_IFSR = CRG_PLL_IFSR_OCLK;
+#else
+    CRG->PLL_IFSR = CRG_PLL_IFSR_RCLK;
+#endif    
+    OD = (1 << (CRG->PLL_FCR & 0x01)) * (1 << ((CRG->PLL_FCR & 0x02) >> 1));
+    N = (CRG->PLL_FCR >>  8 ) & 0x3F;
+    M = (CRG->PLL_FCR >> 16) & 0x3F;
+
+#ifdef SYSCLK_EXTERN_OSC
+    SystemCoreClock = EXTERN_XTAL * M / N * 1 / OD;
+#else
+    SystemCoreClock = INTERN_XTAL * M / N * 1 / OD;
+#endif
+}
+
+uint32_t GetSystemClock()
+{
+    return SystemCoreClock;
+}
+
+
+/**
+ * Initialize the system
+ *
+ * @param  none
+ * @return none
+ *
+ * @brief  Setup the microcontroller system.
+ *         Initialize the System.
+ */
+void SystemInit (void)
+{
+    uint8_t M,N,OD;
+
+    (*((volatile uint32_t *)(W7500x_TRIM_BGT))) = (*((volatile uint32_t *)(W7500x_INFO_BGT)));
+    (*((volatile uint32_t *)(W7500x_TRIM_OSC))) = (*((volatile uint32_t *)(W7500x_INFO_OSC)));
+
+    
+    // Set PLL input frequency
+#ifdef SYSCLK_EXTERN_OSC
+    CRG->PLL_IFSR = CRG_PLL_IFSR_OCLK;
+#else
+    CRG->PLL_IFSR = CRG_PLL_IFSR_RCLK;
+#endif    
+    OD = (1 << (CRG->PLL_FCR & 0x01)) * (1 << ((CRG->PLL_FCR & 0x02) >> 1));
+    N = (CRG->PLL_FCR >>  8 ) & 0x3F;
+    M = (CRG->PLL_FCR >> 16) & 0x3F;
+
+#ifdef SYSCLK_EXTERN_OSC
+    SystemCoreClock = EXTERN_XTAL * M / N * 1 / OD;
+#else
+    SystemCoreClock = INTERN_XTAL * M / N * 1 / OD;
+#endif
+}