S32K144裸机之GPIO和外部中断

/* ** ################################################################### ** Processor: S32K144_100 ** Compilers: GNU C Compiler ** GreenHills ARM Compiler ** IAR ANSI C/C++ Compiler for ARM ** ** Reference manual: S32K144RM Rev. 1, Draft D, 10/2015 ** Version: rev. 1.7, 2015-10-21 ** Build: b151027 ** ** Abstract: ** Provides a system configuration function and a global variable that ** contains the system frequency. It configures the device and initializes ** the oscillator (PLL) that is part of the microcontroller device. ** ** Copyright (c) 2015 Freescale Semiconductor, Inc. ** All rights reserved. ** ** Redistribution and use in source and binary forms, with or without modification, ** are permitted provided that the following conditions are met: ** ** o Redistributions of source code must retain the above copyright notice, this list ** of conditions and the following disclaimer. ** ** o 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. ** ** o Neither the name of Freescale Semiconductor, Inc. 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. ** ** http: www.freescale.com ** mail: support@freescale.com ** ** Revisions: ** - rev. 1.0 (2015-04-09) - Iulian Talpiga ** Initial version. ** - rev. 1.1 (2015-05-19) - Bogdan Nitu ** Updated interrupts table ** Removed SIM_CHIPCTL_DAC2CMP ** Compacted PORT_PCR registers ** - rev. 1.2 (2015-09-16) - Iulian Talpiga ** Implemented SystemCoreClockUpdate ** - rev. 1.3 (2015-11-26) - Iulian Talpiga ** Improved FPU enable logic and comments ** ** ################################################################### */ /*! * @file S32K144 * @version 1.3 * @date 2015-11-26 * @brief Device specific configuration file for S32K144 (implementation file) * * Provides a system configuration function and a global variable that contains * the system frequency. */ /** * @page misra_violations MISRA-C:2012 violations * * @section [global] * Violates MISRA 2012 Advisory Rule 8.9, An object should be defined at block * scope if its identifier only appears in a single function. * An object with static storage duration declared at block scope cannot be * accessed directly from outside the block. * * @section [global] * Violates MISRA 2012 Advisory Rule 11.4, A conversion should not be performed * between a pointer to object and an integer type. * The cast is required to initialize a pointer with an unsigned int define, * representing an address. * * @section [global] * Violates MISRA 2012 Required Rule 11.6, A cast shall not be performed * between pointer to void and an arithmetic type. * The cast is required to initialize a pointer with an unsigned int define, * representing an address. * * @section [global] * Violates MISRA 2012 Advisory Rule 8.7, External could be made static. * Function is defined for usage by application code. * */ #include "fsl_device_registers.h" #include "system_S32K144.h" #include "stdbool.h" /* ---------------------------------------------------------------------------- -- Core clock ---------------------------------------------------------------------------- */ uint32_t SystemCoreClock = DEFAULT_SYSTEM_CLOCK; /*FUNCTION********************************************************************** * * Function Name : SystemInit * Description : Typically this function configures the oscillator that is part * of the microcontroller device. For systems with variable clock speed it also * updates the variable SystemCoreClock. SystemInit is called from startup_device file. * * Implements : SystemInit_Activity *END**************************************************************************/ void SystemInit(void) { /**************************************************************************/ /* FPU ENABLE*/ /**************************************************************************/ #ifdef ENABLE_FPU /* Enable CP10 and CP11 coprocessors */ FSL_SCB->CPACR |= (FSL_SCB_CPACR_CP10_MASK | FSL_SCB_CPACR_CP11_MASK); #endif /* ENABLE_FPU */ /**************************************************************************/ /* WDOG DISABLE*/ /**************************************************************************/ #if (DISABLE_WDOG) /* Write of the WDOG unlock key to CNT register, must be done in order to allow any modifications*/ WDOG->CNT = (uint32_t ) FSL_FEATURE_WDOG_UNLOCK_VALUE; /* Initial write of WDOG configuration register: * enables support for 32-bit refresh/unlock command write words, * clock select from LPO, update enable, watchdog disabled */ WDOG->CS = (uint32_t ) ( (1UL << WDOG_CS_CMD32EN_SHIFT) | (FSL_FEATURE_WDOG_CLK_FROM_LPO << WDOG_CS_CLK_SHIFT) | (0U << WDOG_CS_EN_SHIFT) | (1U << WDOG_CS_UPDATE_SHIFT) ); /* Configure timeout */ WDOG->TOVAL = (uint32_t )0xFFFF; #endif /* (DISABLE_WDOG) */ /**************************************************************************/ /* Power mode protection */ /**************************************************************************/ #ifdef SYSTEM_SMC_PMPROT_VALUE /* Power mode protection initialization */ SMC->PMPROT = SYSTEM_SMC_PMPROT_VALUE; #endif } /*FUNCTION********************************************************************** * * Function Name : SystemCoreClockUpdate * Description : This function must be called whenever the core clock is changed * during program execution. It evaluates the clock register settings and calculates * the current core clock. * * Implements : SystemCoreClockUpdate_Activity *END**************************************************************************/ void SystemCoreClockUpdate(void) { uint32_t SCGOUTClock = 0U; /* Variable to store output clock frequency of the SCG module */ uint32_t regValue; /* Temporary variable */ uint32_t divider, prediv, multi; bool validSystemClockSource = true; static const uint32_t fircFreq[] = { FSL_FEATURE_SCG_FIRC_FREQ0, FSL_FEATURE_SCG_FIRC_FREQ1, FSL_FEATURE_SCG_FIRC_FREQ2, FSL_FEATURE_SCG_FIRC_FREQ3, }; divider = ((SCG->CSR & SCG_CSR_DIVCORE_MASK) >> SCG_CSR_DIVCORE_SHIFT) + 1U; switch ((SCG->CSR & SCG_CSR_SCS_MASK) >> SCG_CSR_SCS_SHIFT) {