added prescaler for 16 bit pwm in LPC1347 target
Fork of mbed-dev by
targets/cmsis/TARGET_ARM_SSG/TARGET_MPS2_M7/system_CMSDK_CM7.c@0:9b334a45a8ff, 2015-10-01 (annotated)
- Committer:
- bogdanm
- Date:
- Thu Oct 01 15:25:22 2015 +0300
- Revision:
- 0:9b334a45a8ff
- Child:
- 80:bdf1132a57cf
Initial commit on mbed-dev
Replaces mbed-src (now inactive)
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 0:9b334a45a8ff | 1 | /* MPS2 CMSIS Library |
bogdanm | 0:9b334a45a8ff | 2 | * |
bogdanm | 0:9b334a45a8ff | 3 | * Copyright (c) 2006-2015 ARM Limited |
bogdanm | 0:9b334a45a8ff | 4 | * All rights reserved. |
bogdanm | 0:9b334a45a8ff | 5 | * |
bogdanm | 0:9b334a45a8ff | 6 | * Redistribution and use in source and binary forms, with or without |
bogdanm | 0:9b334a45a8ff | 7 | * modification, are permitted provided that the following conditions are met: |
bogdanm | 0:9b334a45a8ff | 8 | * |
bogdanm | 0:9b334a45a8ff | 9 | * 1. Redistributions of source code must retain the above copyright notice, |
bogdanm | 0:9b334a45a8ff | 10 | * this list of conditions and the following disclaimer. |
bogdanm | 0:9b334a45a8ff | 11 | * |
bogdanm | 0:9b334a45a8ff | 12 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
bogdanm | 0:9b334a45a8ff | 13 | * this list of conditions and the following disclaimer in the documentation |
bogdanm | 0:9b334a45a8ff | 14 | * and/or other materials provided with the distribution. |
bogdanm | 0:9b334a45a8ff | 15 | * |
bogdanm | 0:9b334a45a8ff | 16 | * 3. Neither the name of the copyright holder nor the names of its contributors |
bogdanm | 0:9b334a45a8ff | 17 | * may be used to endorse or promote products derived from this software without |
bogdanm | 0:9b334a45a8ff | 18 | * specific prior written permission. |
bogdanm | 0:9b334a45a8ff | 19 | * |
bogdanm | 0:9b334a45a8ff | 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
bogdanm | 0:9b334a45a8ff | 21 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
bogdanm | 0:9b334a45a8ff | 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
bogdanm | 0:9b334a45a8ff | 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
bogdanm | 0:9b334a45a8ff | 24 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
bogdanm | 0:9b334a45a8ff | 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
bogdanm | 0:9b334a45a8ff | 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
bogdanm | 0:9b334a45a8ff | 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
bogdanm | 0:9b334a45a8ff | 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
bogdanm | 0:9b334a45a8ff | 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
bogdanm | 0:9b334a45a8ff | 30 | * POSSIBILITY OF SUCH DAMAGE. |
bogdanm | 0:9b334a45a8ff | 31 | ******************************************************************************* |
bogdanm | 0:9b334a45a8ff | 32 | * @file system_CMSDK_CM7.c |
bogdanm | 0:9b334a45a8ff | 33 | * @brief CMSIS Device System Source File for |
bogdanm | 0:9b334a45a8ff | 34 | * CMSDK_CM7 Device |
bogdanm | 0:9b334a45a8ff | 35 | * @version V1.00 |
bogdanm | 0:9b334a45a8ff | 36 | * @date 27. August 2014 |
bogdanm | 0:9b334a45a8ff | 37 | * |
bogdanm | 0:9b334a45a8ff | 38 | * @note |
bogdanm | 0:9b334a45a8ff | 39 | * |
bogdanm | 0:9b334a45a8ff | 40 | *******************************************************************************/ |
bogdanm | 0:9b334a45a8ff | 41 | |
bogdanm | 0:9b334a45a8ff | 42 | |
bogdanm | 0:9b334a45a8ff | 43 | #if defined (CMSDK_CM7) |
bogdanm | 0:9b334a45a8ff | 44 | #include "CMSDK_CM7.h" |
bogdanm | 0:9b334a45a8ff | 45 | #elif defined (CMSDK_CM7_SP) |
bogdanm | 0:9b334a45a8ff | 46 | #include "CMSDK_CM7_SP.h" |
bogdanm | 0:9b334a45a8ff | 47 | #elif defined (CMSDK_CM7_DP) |
bogdanm | 0:9b334a45a8ff | 48 | #include "CMSDK_CM7_DP.h" |
bogdanm | 0:9b334a45a8ff | 49 | #else |
bogdanm | 0:9b334a45a8ff | 50 | #error device not specified! |
bogdanm | 0:9b334a45a8ff | 51 | #endif |
bogdanm | 0:9b334a45a8ff | 52 | |
bogdanm | 0:9b334a45a8ff | 53 | /*---------------------------------------------------------------------------- |
bogdanm | 0:9b334a45a8ff | 54 | Define clocks |
bogdanm | 0:9b334a45a8ff | 55 | *----------------------------------------------------------------------------*/ |
bogdanm | 0:9b334a45a8ff | 56 | #define __XTAL (50000000UL) /* Oscillator frequency */ |
bogdanm | 0:9b334a45a8ff | 57 | |
bogdanm | 0:9b334a45a8ff | 58 | #define __SYSTEM_CLOCK (__XTAL / 2) |
bogdanm | 0:9b334a45a8ff | 59 | |
bogdanm | 0:9b334a45a8ff | 60 | |
bogdanm | 0:9b334a45a8ff | 61 | /*---------------------------------------------------------------------------- |
bogdanm | 0:9b334a45a8ff | 62 | System Core Clock Variable |
bogdanm | 0:9b334a45a8ff | 63 | *----------------------------------------------------------------------------*/ |
bogdanm | 0:9b334a45a8ff | 64 | uint32_t SystemCoreClock = __SYSTEM_CLOCK;/* System Core Clock Frequency */ |
bogdanm | 0:9b334a45a8ff | 65 | |
bogdanm | 0:9b334a45a8ff | 66 | |
bogdanm | 0:9b334a45a8ff | 67 | /** |
bogdanm | 0:9b334a45a8ff | 68 | * Update SystemCoreClock variable |
bogdanm | 0:9b334a45a8ff | 69 | * |
bogdanm | 0:9b334a45a8ff | 70 | * @param none |
bogdanm | 0:9b334a45a8ff | 71 | * @return none |
bogdanm | 0:9b334a45a8ff | 72 | * |
bogdanm | 0:9b334a45a8ff | 73 | * @brief Updates the SystemCoreClock with current core Clock |
bogdanm | 0:9b334a45a8ff | 74 | * retrieved from cpu registers. |
bogdanm | 0:9b334a45a8ff | 75 | */ |
bogdanm | 0:9b334a45a8ff | 76 | void SystemCoreClockUpdate (void) |
bogdanm | 0:9b334a45a8ff | 77 | { |
bogdanm | 0:9b334a45a8ff | 78 | |
bogdanm | 0:9b334a45a8ff | 79 | SystemCoreClock = __SYSTEM_CLOCK; |
bogdanm | 0:9b334a45a8ff | 80 | |
bogdanm | 0:9b334a45a8ff | 81 | } |
bogdanm | 0:9b334a45a8ff | 82 | |
bogdanm | 0:9b334a45a8ff | 83 | /** |
bogdanm | 0:9b334a45a8ff | 84 | * Initialize the system |
bogdanm | 0:9b334a45a8ff | 85 | * |
bogdanm | 0:9b334a45a8ff | 86 | * @param none |
bogdanm | 0:9b334a45a8ff | 87 | * @return none |
bogdanm | 0:9b334a45a8ff | 88 | * |
bogdanm | 0:9b334a45a8ff | 89 | * @brief Setup the microcontroller system. |
bogdanm | 0:9b334a45a8ff | 90 | * Initialize the System. |
bogdanm | 0:9b334a45a8ff | 91 | */ |
bogdanm | 0:9b334a45a8ff | 92 | void SystemInit (void) |
bogdanm | 0:9b334a45a8ff | 93 | { |
bogdanm | 0:9b334a45a8ff | 94 | #if (__FPU_USED == 1) |
bogdanm | 0:9b334a45a8ff | 95 | SCB->CPACR |= ((3UL << 10*2) | /* set CP10 Full Access */ |
bogdanm | 0:9b334a45a8ff | 96 | (3UL << 11*2) ); /* set CP11 Full Access */ |
bogdanm | 0:9b334a45a8ff | 97 | #endif |
bogdanm | 0:9b334a45a8ff | 98 | |
bogdanm | 0:9b334a45a8ff | 99 | #ifdef UNALIGNED_SUPPORT_DISABLE |
bogdanm | 0:9b334a45a8ff | 100 | SCB->CCR |= SCB_CCR_UNALIGN_TRP_Msk; |
bogdanm | 0:9b334a45a8ff | 101 | #endif |
bogdanm | 0:9b334a45a8ff | 102 | |
bogdanm | 0:9b334a45a8ff | 103 | SystemCoreClock = __SYSTEM_CLOCK; |
bogdanm | 0:9b334a45a8ff | 104 | |
bogdanm | 0:9b334a45a8ff | 105 | } |