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Diffstat (limited to 'board/src/clock_config.c')
| -rw-r--r-- | board/src/clock_config.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/board/src/clock_config.c b/board/src/clock_config.c new file mode 100644 index 0000000..4da9ef5 --- /dev/null +++ b/board/src/clock_config.c @@ -0,0 +1,229 @@ +/* + * Copyright (c) 2013 - 2016, 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. + */ + +/* This is a template for clock configuration created by New Kinetis SDK 2.x Project Wizard. Enjoy! */ + +#include "fsl_device_registers.h" +#include "fsl_common.h" +#include "fsl_clock.h" +#include "fsl_port.h" +#include "clock_config.h" + +/******************************************************************************* + * Definitions + ******************************************************************************/ + +/******************************************************************************* + * Variables + ******************************************************************************/ + +/******************************************************************************* + * Code + ******************************************************************************/ + +#define MCG_IRCLK_DISABLE 0U /*!< MCGIRCLK disabled */ +#define MCG_PLL_DISABLE 0U /*!< MCGPLLCLK disabled */ +#define OSC_CAP0P 0U /*!< Oscillator 0pF capacitor load */ +#define OSC_ER_CLK_DISABLE 0U /*!< Disable external reference clock */ +#define SIM_OSC32KSEL_OSC32KCLK_CLK 0U /*!< OSC32KSEL select: OSC32KCLK clock */ +#define SIM_PLLFLLSEL_MCGFLLCLK_CLK 0U /*!< PLLFLL select: MCGFLLCLK clock */ +#define SIM_PLLFLLSEL_MCGPLLCLK_CLK 1U /*!< PLLFLL select: MCGPLLCLK clock */ +#define BOARD_BOOTCLOCKRUN_CORE_CLOCK 100000000U /*!< Core clock frequency: 100000000Hz */ + +/******************************************************************************* + * Variables + ******************************************************************************/ +/* System clock frequency. */ +extern uint32_t SystemCoreClock; + +/******************************************************************************* + * Code + ******************************************************************************/ +/*FUNCTION********************************************************************** + * + * Function Name : CLOCK_CONFIG_SetFllExtRefDiv + * Description : Configure FLL external reference divider (FRDIV). + * Param frdiv : The value to set FRDIV. + * + *END**************************************************************************/ +static void CLOCK_CONFIG_SetFllExtRefDiv(uint8_t frdiv) +{ + MCG->C1 = ((MCG->C1 & ~MCG_C1_FRDIV_MASK) | MCG_C1_FRDIV(frdiv)); +} + +/******************************************************************************* + ************************ BOARD_InitBootClocks function ************************ + ******************************************************************************/ +void BOARD_InitBootClocks(void) +{ + BOARD_BootClockRUN(); +} + +/******************************************************************************* + ********************** Configuration BOARD_BootClockRUN *********************** + ******************************************************************************/ +/* TEXT BELOW IS USED AS SETTING FOR TOOLS ************************************* +!!Configuration +name: BOARD_BootClockRUN +called_from_default_init: true +outputs: +- {id: Bus_clock.outFreq, value: 50 MHz} +- {id: Core_clock.outFreq, value: 100 MHz, locked: true, accuracy: '0.001'} +- {id: Flash_clock.outFreq, value: 25 MHz} +- {id: FlexBus_clock.outFreq, value: 50 MHz} +- {id: LPO_clock.outFreq, value: 1 kHz} +- {id: MCGFFCLK.outFreq, value: 250 kHz} +- {id: System_clock.outFreq, value: 100 MHz} +settings: +- {id: MCGMode, value: PEE} +- {id: MCG.FRDIV.scale, value: '32'} +- {id: MCG.IREFS.sel, value: MCG.FRDIV} +- {id: MCG.PLLS.sel, value: MCG.PLL} +- {id: MCG.PRDIV.scale, value: '2'} +- {id: MCG.VDIV.scale, value: '25'} +- {id: MCG_C2_OSC_MODE_CFG, value: ModeOscLowPower} +- {id: MCG_C2_RANGE0_CFG, value: Very_high} +- {id: MCG_C2_RANGE0_FRDIV_CFG, value: Very_high} +- {id: SIM.OUTDIV2.scale, value: '2'} +- {id: SIM.OUTDIV3.scale, value: '2'} +- {id: SIM.OUTDIV4.scale, value: '4'} +sources: +- {id: OSC.OSC.outFreq, value: 8 MHz, enabled: true} + * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS **********/ + +/******************************************************************************* + * Variables for BOARD_BootClockRUN configuration + ******************************************************************************/ +const mcg_config_t mcgConfig_BOARD_BootClockRUN = + { + .mcgMode = kMCG_ModePEE, /* PEE - PLL Engaged External */ + .irclkEnableMode = MCG_IRCLK_DISABLE, /* MCGIRCLK disabled */ + .ircs = kMCG_IrcSlow, /* Slow internal reference clock selected */ + .fcrdiv = 0x1U, /* Fast IRC divider: divided by 2 */ + .frdiv = 0x0U, /* FLL reference clock divider: divided by 32 */ + .drs = kMCG_DrsLow, /* Low frequency range */ + .dmx32 = kMCG_Dmx32Default, /* DCO has a default range of 25% */ + .oscsel = kMCG_OscselOsc, /* Selects System Oscillator (OSCCLK) */ + .pll0Config = + { + .enableMode = MCG_PLL_DISABLE, /* MCGPLLCLK disabled */ + .prdiv = 0x1U, /* PLL Reference divider: divided by 2 */ + .vdiv = 0x1U, /* VCO divider: multiplied by 25 */ + }, + }; +const sim_clock_config_t simConfig_BOARD_BootClockRUN = + { + .pllFllSel = SIM_PLLFLLSEL_MCGPLLCLK_CLK, /* PLLFLL select: MCGPLLCLK clock */ + .er32kSrc = SIM_OSC32KSEL_OSC32KCLK_CLK, /* OSC32KSEL select: OSC32KCLK clock */ + .clkdiv1 = 0x01130000U, /* SIM_CLKDIV1 - OUTDIV1: /1, OUTDIV2: /2, OUTDIV3: /2, OUTDIV4: /4 */ + }; +const osc_config_t oscConfig_BOARD_BootClockRUN = + { + .freq = 8000000U, /* Oscillator frequency: 8000000Hz */ + .capLoad = (OSC_CAP0P), /* Oscillator capacity load: 0pF */ + .workMode = kOSC_ModeOscLowPower, /* Oscillator low power */ + .oscerConfig = + { + .enableMode = OSC_ER_CLK_DISABLE, /* Disable external reference clock */ + } + }; + + +/******************************************************************************* + * Code for BOARD_BootClockRUN configuration + ******************************************************************************/ +void BOARD_BootClockRUN(void) +{ + /* Set the system clock dividers in SIM to safe value. */ + CLOCK_SetSimSafeDivs(); + /* Initializes OSC0 according to board configuration. */ + CLOCK_InitOsc0(&oscConfig_BOARD_BootClockRUN); + CLOCK_SetXtal0Freq(oscConfig_BOARD_BootClockRUN.freq); + /* Configure FLL external reference divider (FRDIV). */ + CLOCK_CONFIG_SetFllExtRefDiv(mcgConfig_BOARD_BootClockRUN.frdiv); + /* Set MCG to PEE mode. */ + CLOCK_BootToPeeMode(mcgConfig_BOARD_BootClockRUN.oscsel, + kMCG_PllClkSelPll0, + &mcgConfig_BOARD_BootClockRUN.pll0Config); + /* Set the clock configuration in SIM module. */ + CLOCK_SetSimConfig(&simConfig_BOARD_BootClockRUN); + /* Set SystemCoreClock variable. */ + SystemCoreClock = BOARD_BOOTCLOCKRUN_CORE_CLOCK; +} + +#if 0 +void BOARD_InitOsc0(void) +{ + const osc_config_t oscConfig = {.freq = BOARD_XTAL0_CLK_HZ, + .capLoad = 0, + .workMode = kOSC_ModeOscLowPower, + .oscerConfig = { + .enableMode = kOSC_ErClkEnable, +#if (defined(FSL_FEATURE_OSC_HAS_EXT_REF_CLOCK_DIVIDER) && FSL_FEATURE_OSC_HAS_EXT_REF_CLOCK_DIVIDER) + .erclkDiv = 0U, +#endif + }}; + + CLOCK_InitOsc0(&oscConfig); + + /* Passing the XTAL0 frequency to clock driver. */ + CLOCK_SetXtal0Freq(BOARD_XTAL0_CLK_HZ); + /* Use RTC_CLKIN input clock directly. */ + //CLOCK_SetXtal32Freq(BOARD_XTAL32K_CLK_HZ); +} + +void BOARD_BootClockRUN(void) +{ + /* + * Core clock: 100MHz + * Bus clock: 50MHz + */ + mcg_pll_config_t pll0Config = { + .enableMode = 0U, .prdiv = 0x3U, .vdiv = 0x18U, + }; + const sim_clock_config_t simConfig = { + .pllFllSel = 1U, /* PLLFLLSEL select PLL. */ + .er32kSrc = 2U, /* ERCLK32K selection, use RTC. */ + .clkdiv1 = 0x01130000U, /* SIM_CLKDIV1. */ + }; + + CLOCK_SetSimSafeDivs(); + BOARD_InitOsc0(); + + CLOCK_CalcPllDiv(BOARD_XTAL0_CLK_HZ, 100000000U, &pll0Config.prdiv, &pll0Config.vdiv); + CLOCK_BootToPeeMode(kMCG_OscselOsc, kMCG_PllClkSelPll0, &pll0Config); + + CLOCK_SetInternalRefClkConfig(kMCG_IrclkEnable, kMCG_IrcSlow, 0); + CLOCK_SetSimConfig(&simConfig); + + SystemCoreClock = 100000000U; +} +#endif + |