/* ** ################################################################### ** Processors: MIMXRT1021CAF4A ** MIMXRT1021CAG4A ** MIMXRT1021DAF5A ** MIMXRT1021DAG5A ** ** Compilers: Freescale C/C++ for Embedded ARM ** GNU C Compiler ** IAR ANSI C/C++ Compiler for ARM ** Keil ARM C/C++ Compiler ** MCUXpresso Compiler ** ** Reference manual: IMXRT1020RM Rev.2, 01/2021 | IMXRT102XSRM Rev.0 ** Version: rev. 1.2, 2021-08-10 ** Build: b210811 ** ** 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 2016 Freescale Semiconductor, Inc. ** Copyright 2016-2021 NXP ** All rights reserved. ** ** SPDX-License-Identifier: BSD-3-Clause ** ** http: www.nxp.com ** mail: support@nxp.com ** ** Revisions: ** - rev. 0.1 (2017-11-06) ** Initial version. ** - rev. 1.0 (2018-11-27) ** Update header files to align with IMXRT1020RM Rev.1. ** - rev. 1.1 (2019-04-29) ** Add SET/CLR/TOG register group to register CTRL, STAT, CHANNELCTRL, CH0STAT, CH0OPTS, CH1STAT, CH1OPTS, CH2STAT, CH2OPTS, CH3STAT, CH3OPTS of DCP module. ** - rev. 1.2 (2021-08-10) ** Update header files to align with IMXRT1020RM Rev.2. ** ** ################################################################### */ /*! * @file MIMXRT1021 * @version 1.2 * @date 2021-08-10 * @brief Device specific configuration file for MIMXRT1021 (implementation file) * * 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. */ #include #include "fsl_device_registers.h" /* ---------------------------------------------------------------------------- -- Core clock ---------------------------------------------------------------------------- */ uint32_t SystemCoreClock = DEFAULT_SYSTEM_CLOCK; /* ---------------------------------------------------------------------------- -- SystemInit() ---------------------------------------------------------------------------- */ void SystemInit (void) { #if ((__FPU_PRESENT == 1) && (__FPU_USED == 1)) SCB->CPACR |= ((3UL << 10*2) | (3UL << 11*2)); /* set CP10, CP11 Full Access */ #endif /* ((__FPU_PRESENT == 1) && (__FPU_USED == 1)) */ #if defined(__MCUXPRESSO) extern uint32_t g_pfnVectors[]; // Vector table defined in startup code SCB->VTOR = (uint32_t)g_pfnVectors; #endif /* Disable Watchdog Power Down Counter */ WDOG1->WMCR &= ~(uint16_t) WDOG_WMCR_PDE_MASK; WDOG2->WMCR &= ~(uint16_t) WDOG_WMCR_PDE_MASK; /* Watchdog disable */ #if (DISABLE_WDOG) if ((WDOG1->WCR & WDOG_WCR_WDE_MASK) != 0U) { WDOG1->WCR &= ~(uint16_t) WDOG_WCR_WDE_MASK; } if ((WDOG2->WCR & WDOG_WCR_WDE_MASK) != 0U) { WDOG2->WCR &= ~(uint16_t) WDOG_WCR_WDE_MASK; } if ((RTWDOG->CS & RTWDOG_CS_CMD32EN_MASK) != 0U) { RTWDOG->CNT = 0xD928C520U; /* 0xD928C520U is the update key */ } else { RTWDOG->CNT = 0xC520U; RTWDOG->CNT = 0xD928U; } RTWDOG->TOVAL = 0xFFFF; RTWDOG->CS = (uint32_t) ((RTWDOG->CS) & ~RTWDOG_CS_EN_MASK) | RTWDOG_CS_UPDATE_MASK; #endif /* (DISABLE_WDOG) */ /* Disable Systick which might be enabled by bootrom */ if ((SysTick->CTRL & SysTick_CTRL_ENABLE_Msk) != 0U) { SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk; } /* Enable instruction and data caches */ #if defined(__ICACHE_PRESENT) && __ICACHE_PRESENT if (SCB_CCR_IC_Msk != (SCB_CCR_IC_Msk & SCB->CCR)) { SCB_EnableICache(); } #endif SystemInitHook(); } /* ---------------------------------------------------------------------------- -- SystemCoreClockUpdate() ---------------------------------------------------------------------------- */ void SystemCoreClockUpdate (void) { uint32_t freq; uint32_t PLL2MainClock; uint32_t PLL3MainClock; /* Check if system pll is bypassed */ if((CCM_ANALOG->PLL_SYS & CCM_ANALOG_PLL_SYS_BYPASS_MASK) != 0U) { PLL2MainClock = CPU_XTAL_CLK_HZ; } else { PLL2MainClock = (CPU_XTAL_CLK_HZ * (((CCM_ANALOG->PLL_SYS & CCM_ANALOG_PLL_SYS_DIV_SELECT_MASK) != 0U) ? 22U : 20U)); } PLL2MainClock += (uint32_t)(((uint64_t)CPU_XTAL_CLK_HZ * ((uint64_t)(CCM_ANALOG->PLL_SYS_NUM))) / ((uint64_t)(CCM_ANALOG->PLL_SYS_DENOM))); /* Check if usb1 pll is bypassed */ if((CCM_ANALOG->PLL_USB1 & CCM_ANALOG_PLL_USB1_BYPASS_MASK) != 0U) { PLL3MainClock = CPU_XTAL_CLK_HZ; } else { PLL3MainClock = (CPU_XTAL_CLK_HZ * (((CCM_ANALOG->PLL_USB1 & CCM_ANALOG_PLL_USB1_DIV_SELECT_MASK) != 0U) ? 22U : 20U)); } /* Periph_clk2_clk ---> Periph_clk */ if ((CCM->CBCDR & CCM_CBCDR_PERIPH_CLK_SEL_MASK) != 0U) { switch (CCM->CBCMR & CCM_CBCMR_PERIPH_CLK2_SEL_MASK) { /* Pll3_sw_clk ---> Periph_clk2_clk ---> Periph_clk ---> Core_clock */ case CCM_CBCMR_PERIPH_CLK2_SEL(0U): freq = PLL3MainClock; break; /* Osc_clk ---> Periph_clk2_clk ---> Periph_clk ---> Core_clock */ case CCM_CBCMR_PERIPH_CLK2_SEL(1U): freq = CPU_XTAL_CLK_HZ; break; /* Pll2_bypass_clk ---> Periph_clk2_clk ---> Periph_clk ---> Core_clock */ case CCM_CBCMR_PERIPH_CLK2_SEL(2U): freq = CPU_XTAL_CLK_HZ; break; case CCM_CBCMR_PERIPH_CLK2_SEL(3U): default: freq = 0U; break; } freq /= (((CCM->CBCDR & CCM_CBCDR_PERIPH_CLK2_PODF_MASK) >> CCM_CBCDR_PERIPH_CLK2_PODF_SHIFT) + 1U); } /* Pre_Periph_clk ---> Periph_clk */ else { switch (CCM->CBCMR & CCM_CBCMR_PRE_PERIPH_CLK_SEL_MASK) { /* PLL2 ---> Pre_Periph_clk ---> Periph_clk ---> Core_clock */ case CCM_CBCMR_PRE_PERIPH_CLK_SEL(0U): freq = PLL2MainClock; break; /* PLL3 PFD3 ---> Pre_Periph_clk ---> Periph_clk ---> Core_clock */ case CCM_CBCMR_PRE_PERIPH_CLK_SEL(1U): freq = PLL3MainClock / ((CCM_ANALOG->PFD_480 & CCM_ANALOG_PFD_480_PFD3_FRAC_MASK) >> CCM_ANALOG_PFD_480_PFD3_FRAC_SHIFT) * 18U; break; /* PLL2 PFD3 ---> Pre_Periph_clk ---> Periph_clk ---> Core_clock */ case CCM_CBCMR_PRE_PERIPH_CLK_SEL(2U): freq = PLL2MainClock / ((CCM_ANALOG->PFD_528 & CCM_ANALOG_PFD_528_PFD3_FRAC_MASK) >> CCM_ANALOG_PFD_528_PFD3_FRAC_SHIFT) * 18U; break; /* PLL6 ---> Pre_Periph_clk ---> Periph_clk ---> Core_clock */ case CCM_CBCMR_PRE_PERIPH_CLK_SEL(3U): freq = 500000000U / (((CCM->CACRR & CCM_CACRR_ARM_PODF_MASK) >> CCM_CACRR_ARM_PODF_SHIFT) + 1U); break; default: freq = 0U; break; } } SystemCoreClock = (freq / (((CCM->CBCDR & CCM_CBCDR_AHB_PODF_MASK) >> CCM_CBCDR_AHB_PODF_SHIFT) + 1U)); } /* ---------------------------------------------------------------------------- -- SystemInitHook() ---------------------------------------------------------------------------- */ __attribute__ ((weak)) void SystemInitHook (void) { /* Void implementation of the weak function. */ }