mbed library sources
Dependents: Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more
Superseded
This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.
Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.
If you are looking for a stable and tested release, please import one of the official mbed library releases:
Import librarymbed
The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
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 +}