added prescaler for 16 bit pwm in LPC1347 target
Fork of mbed-dev by
targets/cmsis/TARGET_ARM_SSG/TARGET_BEETLE/system_CMSDK_BEETLE.c
- Committer:
- <>
- Date:
- 2016-09-02
- Revision:
- 144:ef7eb2e8f9f7
File content as of revision 144:ef7eb2e8f9f7:
/* * 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(); }