fix LPC812 PWM
Fork of mbed-dev by
targets/cmsis/TARGET_Freescale/TARGET_K22F/system_MK22F51212.c@129:2e517c56bcfb, 2016-05-16 (annotated)
- Committer:
- nameless129
- Date:
- Mon May 16 16:50:30 2016 +0000
- Revision:
- 129:2e517c56bcfb
- Parent:
- 121:7f86b4238bec
PWM Fix:Duty 0%??H???????????????
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 0:9b334a45a8ff | 1 | /* |
bogdanm | 0:9b334a45a8ff | 2 | ** ################################################################### |
mbed_official | 121:7f86b4238bec | 3 | ** Processors: MK22FN512CAP12 |
mbed_official | 121:7f86b4238bec | 4 | ** MK22FN512VDC12 |
mbed_official | 121:7f86b4238bec | 5 | ** MK22FN512VLH12 |
mbed_official | 121:7f86b4238bec | 6 | ** MK22FN512VLL12 |
mbed_official | 121:7f86b4238bec | 7 | ** MK22FN512VMP12 |
mbed_official | 121:7f86b4238bec | 8 | ** |
bogdanm | 0:9b334a45a8ff | 9 | ** Compilers: Keil ARM C/C++ Compiler |
bogdanm | 0:9b334a45a8ff | 10 | ** Freescale C/C++ for Embedded ARM |
bogdanm | 0:9b334a45a8ff | 11 | ** GNU C Compiler |
bogdanm | 0:9b334a45a8ff | 12 | ** IAR ANSI C/C++ Compiler for ARM |
bogdanm | 0:9b334a45a8ff | 13 | ** |
bogdanm | 0:9b334a45a8ff | 14 | ** Reference manual: K22P121M120SF7RM, Rev. 1, March 24, 2014 |
mbed_official | 121:7f86b4238bec | 15 | ** Version: rev. 2.8, 2015-02-19 |
mbed_official | 121:7f86b4238bec | 16 | ** Build: b151217 |
bogdanm | 0:9b334a45a8ff | 17 | ** |
bogdanm | 0:9b334a45a8ff | 18 | ** Abstract: |
bogdanm | 0:9b334a45a8ff | 19 | ** Provides a system configuration function and a global variable that |
bogdanm | 0:9b334a45a8ff | 20 | ** contains the system frequency. It configures the device and initializes |
bogdanm | 0:9b334a45a8ff | 21 | ** the oscillator (PLL) that is part of the microcontroller device. |
bogdanm | 0:9b334a45a8ff | 22 | ** |
mbed_official | 121:7f86b4238bec | 23 | ** Copyright (c) 2015 Freescale Semiconductor, Inc. |
bogdanm | 0:9b334a45a8ff | 24 | ** All rights reserved. |
bogdanm | 0:9b334a45a8ff | 25 | ** |
bogdanm | 0:9b334a45a8ff | 26 | ** Redistribution and use in source and binary forms, with or without modification, |
bogdanm | 0:9b334a45a8ff | 27 | ** are permitted provided that the following conditions are met: |
bogdanm | 0:9b334a45a8ff | 28 | ** |
bogdanm | 0:9b334a45a8ff | 29 | ** o Redistributions of source code must retain the above copyright notice, this list |
bogdanm | 0:9b334a45a8ff | 30 | ** of conditions and the following disclaimer. |
bogdanm | 0:9b334a45a8ff | 31 | ** |
bogdanm | 0:9b334a45a8ff | 32 | ** o Redistributions in binary form must reproduce the above copyright notice, this |
bogdanm | 0:9b334a45a8ff | 33 | ** list of conditions and the following disclaimer in the documentation and/or |
bogdanm | 0:9b334a45a8ff | 34 | ** other materials provided with the distribution. |
bogdanm | 0:9b334a45a8ff | 35 | ** |
bogdanm | 0:9b334a45a8ff | 36 | ** o Neither the name of Freescale Semiconductor, Inc. nor the names of its |
bogdanm | 0:9b334a45a8ff | 37 | ** contributors may be used to endorse or promote products derived from this |
bogdanm | 0:9b334a45a8ff | 38 | ** software without specific prior written permission. |
bogdanm | 0:9b334a45a8ff | 39 | ** |
bogdanm | 0:9b334a45a8ff | 40 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
bogdanm | 0:9b334a45a8ff | 41 | ** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
bogdanm | 0:9b334a45a8ff | 42 | ** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
bogdanm | 0:9b334a45a8ff | 43 | ** DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR |
bogdanm | 0:9b334a45a8ff | 44 | ** ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
bogdanm | 0:9b334a45a8ff | 45 | ** (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
bogdanm | 0:9b334a45a8ff | 46 | ** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
bogdanm | 0:9b334a45a8ff | 47 | ** ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
bogdanm | 0:9b334a45a8ff | 48 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
bogdanm | 0:9b334a45a8ff | 49 | ** SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
bogdanm | 0:9b334a45a8ff | 50 | ** |
bogdanm | 0:9b334a45a8ff | 51 | ** http: www.freescale.com |
bogdanm | 0:9b334a45a8ff | 52 | ** mail: support@freescale.com |
bogdanm | 0:9b334a45a8ff | 53 | ** |
bogdanm | 0:9b334a45a8ff | 54 | ** Revisions: |
bogdanm | 0:9b334a45a8ff | 55 | ** - rev. 1.0 (2013-07-23) |
bogdanm | 0:9b334a45a8ff | 56 | ** Initial version. |
bogdanm | 0:9b334a45a8ff | 57 | ** - rev. 1.1 (2013-09-17) |
bogdanm | 0:9b334a45a8ff | 58 | ** RM rev. 0.4 update. |
bogdanm | 0:9b334a45a8ff | 59 | ** - rev. 2.0 (2013-10-29) |
bogdanm | 0:9b334a45a8ff | 60 | ** Register accessor macros added to the memory map. |
bogdanm | 0:9b334a45a8ff | 61 | ** Symbols for Processor Expert memory map compatibility added to the memory map. |
bogdanm | 0:9b334a45a8ff | 62 | ** Startup file for gcc has been updated according to CMSIS 3.2. |
bogdanm | 0:9b334a45a8ff | 63 | ** System initialization updated. |
bogdanm | 0:9b334a45a8ff | 64 | ** - rev. 2.1 (2013-10-30) |
bogdanm | 0:9b334a45a8ff | 65 | ** Definition of BITBAND macros updated to support peripherals with 32-bit acces disabled. |
bogdanm | 0:9b334a45a8ff | 66 | ** - rev. 2.2 (2013-12-20) |
bogdanm | 0:9b334a45a8ff | 67 | ** Update according to reference manual rev. 0.6, |
bogdanm | 0:9b334a45a8ff | 68 | ** - rev. 2.3 (2014-01-13) |
bogdanm | 0:9b334a45a8ff | 69 | ** Update according to reference manual rev. 0.61, |
bogdanm | 0:9b334a45a8ff | 70 | ** - rev. 2.4 (2014-02-10) |
bogdanm | 0:9b334a45a8ff | 71 | ** The declaration of clock configurations has been moved to separate header file system_MK22F51212.h |
bogdanm | 0:9b334a45a8ff | 72 | ** - rev. 2.5 (2014-05-06) |
bogdanm | 0:9b334a45a8ff | 73 | ** Update according to reference manual rev. 1.0, |
bogdanm | 0:9b334a45a8ff | 74 | ** Update of system and startup files. |
bogdanm | 0:9b334a45a8ff | 75 | ** Module access macro module_BASES replaced by module_BASE_PTRS. |
mbed_official | 121:7f86b4238bec | 76 | ** - rev. 2.6 (2014-08-28) |
mbed_official | 121:7f86b4238bec | 77 | ** Update of system files - default clock configuration changed. |
mbed_official | 121:7f86b4238bec | 78 | ** Update of startup files - possibility to override DefaultISR added. |
mbed_official | 121:7f86b4238bec | 79 | ** - rev. 2.7 (2014-10-14) |
mbed_official | 121:7f86b4238bec | 80 | ** Interrupt INT_LPTimer renamed to INT_LPTMR0, interrupt INT_Watchdog renamed to INT_WDOG_EWM. |
mbed_official | 121:7f86b4238bec | 81 | ** - rev. 2.8 (2015-02-19) |
mbed_official | 121:7f86b4238bec | 82 | ** Renamed interrupt vector LLW to LLWU. |
bogdanm | 0:9b334a45a8ff | 83 | ** |
bogdanm | 0:9b334a45a8ff | 84 | ** ################################################################### |
bogdanm | 0:9b334a45a8ff | 85 | */ |
bogdanm | 0:9b334a45a8ff | 86 | |
bogdanm | 0:9b334a45a8ff | 87 | /*! |
bogdanm | 0:9b334a45a8ff | 88 | * @file MK22F51212 |
mbed_official | 121:7f86b4238bec | 89 | * @version 2.8 |
mbed_official | 121:7f86b4238bec | 90 | * @date 2015-02-19 |
bogdanm | 0:9b334a45a8ff | 91 | * @brief Device specific configuration file for MK22F51212 (implementation file) |
bogdanm | 0:9b334a45a8ff | 92 | * |
bogdanm | 0:9b334a45a8ff | 93 | * Provides a system configuration function and a global variable that contains |
bogdanm | 0:9b334a45a8ff | 94 | * the system frequency. It configures the device and initializes the oscillator |
bogdanm | 0:9b334a45a8ff | 95 | * (PLL) that is part of the microcontroller device. |
bogdanm | 0:9b334a45a8ff | 96 | */ |
bogdanm | 0:9b334a45a8ff | 97 | |
bogdanm | 0:9b334a45a8ff | 98 | #include <stdint.h> |
mbed_official | 121:7f86b4238bec | 99 | #include "fsl_device_registers.h" |
bogdanm | 0:9b334a45a8ff | 100 | |
bogdanm | 0:9b334a45a8ff | 101 | |
bogdanm | 0:9b334a45a8ff | 102 | |
bogdanm | 0:9b334a45a8ff | 103 | /* ---------------------------------------------------------------------------- |
bogdanm | 0:9b334a45a8ff | 104 | -- Core clock |
bogdanm | 0:9b334a45a8ff | 105 | ---------------------------------------------------------------------------- */ |
bogdanm | 0:9b334a45a8ff | 106 | |
bogdanm | 0:9b334a45a8ff | 107 | uint32_t SystemCoreClock = DEFAULT_SYSTEM_CLOCK; |
bogdanm | 0:9b334a45a8ff | 108 | |
bogdanm | 0:9b334a45a8ff | 109 | /* ---------------------------------------------------------------------------- |
bogdanm | 0:9b334a45a8ff | 110 | -- SystemInit() |
bogdanm | 0:9b334a45a8ff | 111 | ---------------------------------------------------------------------------- */ |
bogdanm | 0:9b334a45a8ff | 112 | |
bogdanm | 0:9b334a45a8ff | 113 | void SystemInit (void) { |
bogdanm | 0:9b334a45a8ff | 114 | #if ((__FPU_PRESENT == 1) && (__FPU_USED == 1)) |
bogdanm | 0:9b334a45a8ff | 115 | SCB->CPACR |= ((3UL << 10*2) | (3UL << 11*2)); /* set CP10, CP11 Full Access */ |
bogdanm | 0:9b334a45a8ff | 116 | #endif /* ((__FPU_PRESENT == 1) && (__FPU_USED == 1)) */ |
bogdanm | 0:9b334a45a8ff | 117 | |
bogdanm | 0:9b334a45a8ff | 118 | #if (DISABLE_WDOG) |
bogdanm | 0:9b334a45a8ff | 119 | /* WDOG->UNLOCK: WDOGUNLOCK=0xC520 */ |
bogdanm | 0:9b334a45a8ff | 120 | WDOG->UNLOCK = WDOG_UNLOCK_WDOGUNLOCK(0xC520); /* Key 1 */ |
bogdanm | 0:9b334a45a8ff | 121 | /* WDOG->UNLOCK: WDOGUNLOCK=0xD928 */ |
bogdanm | 0:9b334a45a8ff | 122 | WDOG->UNLOCK = WDOG_UNLOCK_WDOGUNLOCK(0xD928); /* Key 2 */ |
bogdanm | 0:9b334a45a8ff | 123 | /* WDOG->STCTRLH: ?=0,DISTESTWDOG=0,BYTESEL=0,TESTSEL=0,TESTWDOG=0,?=0,?=1,WAITEN=1,STOPEN=1,DBGEN=0,ALLOWUPDATE=1,WINEN=0,IRQRSTEN=0,CLKSRC=1,WDOGEN=0 */ |
bogdanm | 0:9b334a45a8ff | 124 | WDOG->STCTRLH = WDOG_STCTRLH_BYTESEL(0x00) | |
bogdanm | 0:9b334a45a8ff | 125 | WDOG_STCTRLH_WAITEN_MASK | |
bogdanm | 0:9b334a45a8ff | 126 | WDOG_STCTRLH_STOPEN_MASK | |
bogdanm | 0:9b334a45a8ff | 127 | WDOG_STCTRLH_ALLOWUPDATE_MASK | |
bogdanm | 0:9b334a45a8ff | 128 | WDOG_STCTRLH_CLKSRC_MASK | |
bogdanm | 0:9b334a45a8ff | 129 | 0x0100U; |
bogdanm | 0:9b334a45a8ff | 130 | #endif /* (DISABLE_WDOG) */ |
bogdanm | 0:9b334a45a8ff | 131 | |
bogdanm | 0:9b334a45a8ff | 132 | } |
bogdanm | 0:9b334a45a8ff | 133 | |
bogdanm | 0:9b334a45a8ff | 134 | /* ---------------------------------------------------------------------------- |
bogdanm | 0:9b334a45a8ff | 135 | -- SystemCoreClockUpdate() |
bogdanm | 0:9b334a45a8ff | 136 | ---------------------------------------------------------------------------- */ |
bogdanm | 0:9b334a45a8ff | 137 | |
bogdanm | 0:9b334a45a8ff | 138 | void SystemCoreClockUpdate (void) { |
bogdanm | 0:9b334a45a8ff | 139 | |
bogdanm | 0:9b334a45a8ff | 140 | uint32_t MCGOUTClock; /* Variable to store output clock frequency of the MCG module */ |
bogdanm | 0:9b334a45a8ff | 141 | uint16_t Divider; |
bogdanm | 0:9b334a45a8ff | 142 | |
bogdanm | 0:9b334a45a8ff | 143 | if ((MCG->C1 & MCG_C1_CLKS_MASK) == 0x00U) { |
bogdanm | 0:9b334a45a8ff | 144 | /* Output of FLL or PLL is selected */ |
bogdanm | 0:9b334a45a8ff | 145 | if ((MCG->C6 & MCG_C6_PLLS_MASK) == 0x00U) { |
bogdanm | 0:9b334a45a8ff | 146 | /* FLL is selected */ |
bogdanm | 0:9b334a45a8ff | 147 | if ((MCG->C1 & MCG_C1_IREFS_MASK) == 0x00U) { |
bogdanm | 0:9b334a45a8ff | 148 | /* External reference clock is selected */ |
bogdanm | 0:9b334a45a8ff | 149 | switch (MCG->C7 & MCG_C7_OSCSEL_MASK) { |
bogdanm | 0:9b334a45a8ff | 150 | case 0x00U: |
bogdanm | 0:9b334a45a8ff | 151 | MCGOUTClock = CPU_XTAL_CLK_HZ; /* System oscillator drives MCG clock */ |
bogdanm | 0:9b334a45a8ff | 152 | break; |
bogdanm | 0:9b334a45a8ff | 153 | case 0x01U: |
bogdanm | 0:9b334a45a8ff | 154 | MCGOUTClock = CPU_XTAL32k_CLK_HZ; /* RTC 32 kHz oscillator drives MCG clock */ |
bogdanm | 0:9b334a45a8ff | 155 | break; |
bogdanm | 0:9b334a45a8ff | 156 | case 0x02U: |
bogdanm | 0:9b334a45a8ff | 157 | default: |
bogdanm | 0:9b334a45a8ff | 158 | MCGOUTClock = CPU_INT_IRC_CLK_HZ; /* IRC 48MHz oscillator drives MCG clock */ |
bogdanm | 0:9b334a45a8ff | 159 | break; |
bogdanm | 0:9b334a45a8ff | 160 | } |
bogdanm | 0:9b334a45a8ff | 161 | if (((MCG->C2 & MCG_C2_RANGE_MASK) != 0x00U) && ((MCG->C7 & MCG_C7_OSCSEL_MASK) != 0x01U)) { |
bogdanm | 0:9b334a45a8ff | 162 | switch (MCG->C1 & MCG_C1_FRDIV_MASK) { |
bogdanm | 0:9b334a45a8ff | 163 | case 0x38U: |
bogdanm | 0:9b334a45a8ff | 164 | Divider = 1536U; |
bogdanm | 0:9b334a45a8ff | 165 | break; |
bogdanm | 0:9b334a45a8ff | 166 | case 0x30U: |
bogdanm | 0:9b334a45a8ff | 167 | Divider = 1280U; |
bogdanm | 0:9b334a45a8ff | 168 | break; |
bogdanm | 0:9b334a45a8ff | 169 | default: |
bogdanm | 0:9b334a45a8ff | 170 | Divider = (uint16_t)(32LU << ((MCG->C1 & MCG_C1_FRDIV_MASK) >> MCG_C1_FRDIV_SHIFT)); |
bogdanm | 0:9b334a45a8ff | 171 | break; |
bogdanm | 0:9b334a45a8ff | 172 | } |
bogdanm | 0:9b334a45a8ff | 173 | } else {/* ((MCG->C2 & MCG_C2_RANGE_MASK) != 0x00U) */ |
bogdanm | 0:9b334a45a8ff | 174 | Divider = (uint16_t)(1LU << ((MCG->C1 & MCG_C1_FRDIV_MASK) >> MCG_C1_FRDIV_SHIFT)); |
bogdanm | 0:9b334a45a8ff | 175 | } |
bogdanm | 0:9b334a45a8ff | 176 | MCGOUTClock = (MCGOUTClock / Divider); /* Calculate the divided FLL reference clock */ |
bogdanm | 0:9b334a45a8ff | 177 | } else { /* (!((MCG->C1 & MCG_C1_IREFS_MASK) == 0x00U)) */ |
bogdanm | 0:9b334a45a8ff | 178 | MCGOUTClock = CPU_INT_SLOW_CLK_HZ; /* The slow internal reference clock is selected */ |
bogdanm | 0:9b334a45a8ff | 179 | } /* (!((MCG->C1 & MCG_C1_IREFS_MASK) == 0x00U)) */ |
bogdanm | 0:9b334a45a8ff | 180 | /* Select correct multiplier to calculate the MCG output clock */ |
bogdanm | 0:9b334a45a8ff | 181 | switch (MCG->C4 & (MCG_C4_DMX32_MASK | MCG_C4_DRST_DRS_MASK)) { |
bogdanm | 0:9b334a45a8ff | 182 | case 0x00U: |
bogdanm | 0:9b334a45a8ff | 183 | MCGOUTClock *= 640U; |
bogdanm | 0:9b334a45a8ff | 184 | break; |
bogdanm | 0:9b334a45a8ff | 185 | case 0x20U: |
bogdanm | 0:9b334a45a8ff | 186 | MCGOUTClock *= 1280U; |
bogdanm | 0:9b334a45a8ff | 187 | break; |
bogdanm | 0:9b334a45a8ff | 188 | case 0x40U: |
bogdanm | 0:9b334a45a8ff | 189 | MCGOUTClock *= 1920U; |
bogdanm | 0:9b334a45a8ff | 190 | break; |
bogdanm | 0:9b334a45a8ff | 191 | case 0x60U: |
bogdanm | 0:9b334a45a8ff | 192 | MCGOUTClock *= 2560U; |
bogdanm | 0:9b334a45a8ff | 193 | break; |
bogdanm | 0:9b334a45a8ff | 194 | case 0x80U: |
bogdanm | 0:9b334a45a8ff | 195 | MCGOUTClock *= 732U; |
bogdanm | 0:9b334a45a8ff | 196 | break; |
bogdanm | 0:9b334a45a8ff | 197 | case 0xA0U: |
bogdanm | 0:9b334a45a8ff | 198 | MCGOUTClock *= 1464U; |
bogdanm | 0:9b334a45a8ff | 199 | break; |
bogdanm | 0:9b334a45a8ff | 200 | case 0xC0U: |
bogdanm | 0:9b334a45a8ff | 201 | MCGOUTClock *= 2197U; |
bogdanm | 0:9b334a45a8ff | 202 | break; |
bogdanm | 0:9b334a45a8ff | 203 | case 0xE0U: |
bogdanm | 0:9b334a45a8ff | 204 | MCGOUTClock *= 2929U; |
bogdanm | 0:9b334a45a8ff | 205 | break; |
bogdanm | 0:9b334a45a8ff | 206 | default: |
bogdanm | 0:9b334a45a8ff | 207 | break; |
bogdanm | 0:9b334a45a8ff | 208 | } |
bogdanm | 0:9b334a45a8ff | 209 | } else { /* (!((MCG->C6 & MCG_C6_PLLS_MASK) == 0x00U)) */ |
bogdanm | 0:9b334a45a8ff | 210 | /* PLL is selected */ |
bogdanm | 0:9b334a45a8ff | 211 | Divider = (((uint16_t)MCG->C5 & MCG_C5_PRDIV0_MASK) + 0x01U); |
bogdanm | 0:9b334a45a8ff | 212 | MCGOUTClock = (uint32_t)(CPU_XTAL_CLK_HZ / Divider); /* Calculate the PLL reference clock */ |
bogdanm | 0:9b334a45a8ff | 213 | Divider = (((uint16_t)MCG->C6 & MCG_C6_VDIV0_MASK) + 24U); |
bogdanm | 0:9b334a45a8ff | 214 | MCGOUTClock *= Divider; /* Calculate the MCG output clock */ |
bogdanm | 0:9b334a45a8ff | 215 | } /* (!((MCG->C6 & MCG_C6_PLLS_MASK) == 0x00U)) */ |
bogdanm | 0:9b334a45a8ff | 216 | } else if ((MCG->C1 & MCG_C1_CLKS_MASK) == 0x40U) { |
bogdanm | 0:9b334a45a8ff | 217 | /* Internal reference clock is selected */ |
bogdanm | 0:9b334a45a8ff | 218 | if ((MCG->C2 & MCG_C2_IRCS_MASK) == 0x00U) { |
bogdanm | 0:9b334a45a8ff | 219 | MCGOUTClock = CPU_INT_SLOW_CLK_HZ; /* Slow internal reference clock selected */ |
bogdanm | 0:9b334a45a8ff | 220 | } else { /* (!((MCG->C2 & MCG_C2_IRCS_MASK) == 0x00U)) */ |
bogdanm | 0:9b334a45a8ff | 221 | Divider = (uint16_t)(0x01LU << ((MCG->SC & MCG_SC_FCRDIV_MASK) >> MCG_SC_FCRDIV_SHIFT)); |
bogdanm | 0:9b334a45a8ff | 222 | MCGOUTClock = (uint32_t) (CPU_INT_FAST_CLK_HZ / Divider); /* Fast internal reference clock selected */ |
bogdanm | 0:9b334a45a8ff | 223 | } /* (!((MCG->C2 & MCG_C2_IRCS_MASK) == 0x00U)) */ |
bogdanm | 0:9b334a45a8ff | 224 | } else if ((MCG->C1 & MCG_C1_CLKS_MASK) == 0x80U) { |
bogdanm | 0:9b334a45a8ff | 225 | /* External reference clock is selected */ |
bogdanm | 0:9b334a45a8ff | 226 | switch (MCG->C7 & MCG_C7_OSCSEL_MASK) { |
bogdanm | 0:9b334a45a8ff | 227 | case 0x00U: |
bogdanm | 0:9b334a45a8ff | 228 | MCGOUTClock = CPU_XTAL_CLK_HZ; /* System oscillator drives MCG clock */ |
bogdanm | 0:9b334a45a8ff | 229 | break; |
bogdanm | 0:9b334a45a8ff | 230 | case 0x01U: |
bogdanm | 0:9b334a45a8ff | 231 | MCGOUTClock = CPU_XTAL32k_CLK_HZ; /* RTC 32 kHz oscillator drives MCG clock */ |
bogdanm | 0:9b334a45a8ff | 232 | break; |
bogdanm | 0:9b334a45a8ff | 233 | case 0x02U: |
bogdanm | 0:9b334a45a8ff | 234 | default: |
bogdanm | 0:9b334a45a8ff | 235 | MCGOUTClock = CPU_INT_IRC_CLK_HZ; /* IRC 48MHz oscillator drives MCG clock */ |
bogdanm | 0:9b334a45a8ff | 236 | break; |
bogdanm | 0:9b334a45a8ff | 237 | } |
bogdanm | 0:9b334a45a8ff | 238 | } else { /* (!((MCG->C1 & MCG_C1_CLKS_MASK) == 0x80U)) */ |
bogdanm | 0:9b334a45a8ff | 239 | /* Reserved value */ |
bogdanm | 0:9b334a45a8ff | 240 | return; |
bogdanm | 0:9b334a45a8ff | 241 | } /* (!((MCG->C1 & MCG_C1_CLKS_MASK) == 0x80U)) */ |
bogdanm | 0:9b334a45a8ff | 242 | SystemCoreClock = (MCGOUTClock / (0x01U + ((SIM->CLKDIV1 & SIM_CLKDIV1_OUTDIV1_MASK) >> SIM_CLKDIV1_OUTDIV1_SHIFT))); |
bogdanm | 0:9b334a45a8ff | 243 | } |