/**************************************************************************** * boards/arm/stm32l4/stm32l476vg-disco/include/stm32l476vg-disco-clocking.h * * Copyright (C) 2016 Gregory Nutt. All rights reserved. * Author: dev@ziggurat29.com * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. Neither the name NuttX 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 OWNER 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. * ****************************************************************************/ #ifndef __BOARDS_ARM_STM32L4_STM32L476VG_DISCO_INCLUDE_STM32L476VG_DISCO_CLOCKING_H #define __BOARDS_ARM_STM32L4_STM32L476VG_DISCO_INCLUDE_STM32L476VG_DISCO_CLOCKING_H /**************************************************************************** * Included Files ****************************************************************************/ #include #ifndef __ASSEMBLY__ # include #endif /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Clocking *****************************************************************/ /* The stm32l476vg-disco supports both HSE and LSE crystals. * As shipped, the HSE crystal is not populated. * Therefore the stm32l476vg-disco will need to run off the 16MHz HSI clock, * or the 32khz-synced MSI, unless you install the HSE xtal. */ /* HSI - 16 MHz RC factory-trimmed * LSI - 32 KHz RC * MSI - variable up to 48 MHz, synchronized to LSE * HSE - not installed * LSE - 32.768 kHz installed */ #define STM32L4_HSI_FREQUENCY 16000000ul #define STM32L4_LSI_FREQUENCY 32000 #define STM32L4_LSE_FREQUENCY 32768 #define BOARD_AHB_FREQUENCY 80000000ul /* XXX there needs to be independent selections for the System Clock Mux and * the PLL Source Mux; currently System Clock Mux always is PLL, and PLL * Source Mux is chosen by the following define. This is probably OK in many * cases, but should be separated to support other power configurations. */ #if 0 # define HSI_CLOCK_CONFIG 1 /* HSI-16 clock configuration */ #elif 0 /* Make sure you actually installed one! */ # define HSE_CLOCK_CONFIG 1 /* HSE with 8 MHz xtal */ #else # define MSI_CLOCK_CONFIG 1 /* MSI @ 4 MHz autotrimmed via LSE */ #endif #if defined(HSI_CLOCK_CONFIG) #define STM32L4_BOARD_USEHSI 1 /* Prescaler common to all PLL inputs; will be 1 (XXX source is implicitly as per comment above HSI) */ #define STM32L4_PLLCFG_PLLM RCC_PLLCFG_PLLM(1) /* 'main' PLL config; we use this to generate our system clock via the R * output. We set it up as 16 MHz / 1 * 10 / 2 = 80 MHz * * XXX NOTE: currently the main PLL is implicitly turned on and is implicitly * the system clock; this should be configurable since not all applications may * want things done this way. */ #define STM32L4_PLLCFG_PLLN RCC_PLLCFG_PLLN(10) #define STM32L4_PLLCFG_PLLP 0 #undef STM32L4_PLLCFG_PLLP_ENABLED #define STM32L4_PLLCFG_PLLQ RCC_PLLCFG_PLLQ_2 #define STM32L4_PLLCFG_PLLQ_ENABLED #define STM32L4_PLLCFG_PLLR RCC_PLLCFG_PLLR_2 #define STM32L4_PLLCFG_PLLR_ENABLED /* 'SAIPLL1' is used to generate the 48 MHz clock, since we can't * do that with the main PLL's N value. We set N = 13, and enable * the Q output (ultimately for CLK48) with /4. So, * 16 MHz / 1 * 12 / 4 = 48 MHz * * XXX NOTE: currently the SAIPLL /must/ be explicitly selected in the * menuconfig, or else all this is a moot point, and the various 48 MHz * peripherals will not work (RNG at present). I would suggest removing * that option from Kconfig altogether, and simply making it an option * that is selected via a #define here, like all these other params. */ #define STM32L4_PLLSAI1CFG_PLLN RCC_PLLSAI1CFG_PLLN(12) #define STM32L4_PLLSAI1CFG_PLLP 0 #undef STM32L4_PLLSAI1CFG_PLLP_ENABLED #define STM32L4_PLLSAI1CFG_PLLQ RCC_PLLSAI1CFG_PLLQ_4 #define STM32L4_PLLSAI1CFG_PLLQ_ENABLED #define STM32L4_PLLSAI1CFG_PLLR 0 #undef STM32L4_PLLSAI1CFG_PLLR_ENABLED /* 'SAIPLL2' is not used in this application */ #define STM32L4_PLLSAI2CFG_PLLN RCC_PLLSAI2CFG_PLLN(8) #define STM32L4_PLLSAI2CFG_PLLP 0 #undef STM32L4_PLLSAI2CFG_PLLP_ENABLED #define STM32L4_PLLSAI2CFG_PLLR 0 #undef STM32L4_PLLSAI2CFG_PLLR_ENABLED #define STM32L4_SYSCLK_FREQUENCY 80000000ul /* CLK48 will come from PLLSAI1 (implicitly Q) */ #define STM32L4_USE_CLK48 1 #define STM32L4_CLK48_SEL RCC_CCIPR_CLK48SEL_PLLSAI1 /* Enable the LSE oscillator, used automatically trim the MSI, and for RTC */ #define STM32L4_USE_LSE 1 /* AHB clock (HCLK) is SYSCLK (80MHz) */ #define STM32L4_RCC_CFGR_HPRE RCC_CFGR_HPRE_SYSCLK /* HCLK = SYSCLK / 1 */ #define STM32L4_HCLK_FREQUENCY STM32L4_SYSCLK_FREQUENCY #define STM32L4_BOARD_HCLK STM32L4_HCLK_FREQUENCY /* Same as above, to satisfy compiler */ /* APB1 clock (PCLK1) is HCLK/1 (80MHz) */ #define STM32L4_RCC_CFGR_PPRE1 RCC_CFGR_PPRE1_HCLK /* PCLK1 = HCLK / 1 */ #define STM32L4_PCLK1_FREQUENCY (STM32L4_HCLK_FREQUENCY / 1) /* The timer clock frequencies are automatically defined by hardware. * If the APB prescaler equals 1, the timer clock frequencies are set to the * same frequency as that of the APB domain. Otherwise they are set to twice. * * REVISIT : this can be configured */ #define STM32L4_APB1_TIM2_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM3_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM4_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM5_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM6_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM7_CLKIN (STM32L4_PCLK1_FREQUENCY) /* APB2 clock (PCLK2) is HCLK (80MHz) */ #define STM32L4_RCC_CFGR_PPRE2 RCC_CFGR_PPRE2_HCLK /* PCLK2 = HCLK / 1 */ #define STM32L4_PCLK2_FREQUENCY (STM32L4_HCLK_FREQUENCY / 1) /* The timer clock frequencies are automatically defined by hardware. * If the APB prescaler equals 1, the timer clock frequencies are set to the * same frequency as that of the APB domain. Otherwise they are set to twice. * * REVISIT : this can be configured */ #define STM32L4_APB2_TIM1_CLKIN (STM32L4_PCLK2_FREQUENCY) #define STM32L4_APB2_TIM8_CLKIN (STM32L4_PCLK2_FREQUENCY) #elif defined(HSE_CLOCK_CONFIG) /* Use the HSE */ #define STM32L4_BOARD_USEHSE 1 /* XXX sysclk mux = pllclk */ /* XXX pll source mux = hse */ /* Prescaler common to all PLL inputs */ #define STM32L4_PLLCFG_PLLM RCC_PLLCFG_PLLM(1) /* 'main' PLL config; we use this to generate our system clock */ #define STM32L4_PLLCFG_PLLN RCC_PLLCFG_PLLN(20) #define STM32L4_PLLCFG_PLLP 0 #undef STM32L4_PLLCFG_PLLP_ENABLED #define STM32L4_PLLCFG_PLLQ 0 #undef STM32L4_PLLCFG_PLLQ_ENABLED #define STM32L4_PLLCFG_PLLR RCC_PLLCFG_PLLR_2 #define STM32L4_PLLCFG_PLLR_ENABLED /* 'SAIPLL1' is used to generate the 48 MHz clock */ #define STM32L4_PLLSAI1CFG_PLLN RCC_PLLSAI1CFG_PLLN(12) #define STM32L4_PLLSAI1CFG_PLLP 0 #undef STM32L4_PLLSAI1CFG_PLLP_ENABLED #define STM32L4_PLLSAI1CFG_PLLQ RCC_PLLSAI1CFG_PLLQ_2 #define STM32L4_PLLSAI1CFG_PLLQ_ENABLED #define STM32L4_PLLSAI1CFG_PLLR 0 #undef STM32L4_PLLSAI1CFG_PLLR_ENABLED /* 'SAIPLL2' is not used in this application */ #define STM32L4_PLLSAI2CFG_PLLN RCC_PLLSAI2CFG_PLLN(8) #define STM32L4_PLLSAI2CFG_PLLP 0 #undef STM32L4_PLLSAI2CFG_PLLP_ENABLED #define STM32L4_PLLSAI2CFG_PLLR 0 #undef STM32L4_PLLSAI2CFG_PLLR_ENABLED #define STM32L4_SYSCLK_FREQUENCY 80000000ul /* Enable CLK48; get it from PLLSAI1 */ #define STM32L4_USE_CLK48 #define STM32L4_CLK48_SEL RCC_CCIPR_CLK48SEL_PLLSAI1 /* Enable LSE (for the RTC) */ #define STM32L4_USE_LSE 1 /* Configure the HCLK divisor (for the AHB bus, core, memory, and DMA */ #define STM32L4_RCC_CFGR_HPRE RCC_CFGR_HPRE_SYSCLK /* HCLK = SYSCLK / 1 */ #define STM32L4_HCLK_FREQUENCY STM32L4_SYSCLK_FREQUENCY #define STM32L4_BOARD_HCLK STM32L4_HCLK_FREQUENCY /* Same as above, to satisfy compiler */ /* Configure the APB1 prescaler */ #define STM32L4_RCC_CFGR_PPRE1 RCC_CFGR_PPRE1_HCLK /* PCLK1 = HCLK / 1 */ #define STM32L4_PCLK1_FREQUENCY (STM32L4_HCLK_FREQUENCY / 1) #define STM32L4_APB1_TIM2_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM3_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM4_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM5_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM6_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM7_CLKIN (STM32L4_PCLK1_FREQUENCY) /* Configure the APB2 prescaler */ #define STM32L4_RCC_CFGR_PPRE2 RCC_CFGR_PPRE2_HCLK /* PCLK2 = HCLK / 1 */ #define STM32L4_PCLK2_FREQUENCY (STM32L4_HCLK_FREQUENCY / 1) #define STM32L4_APB2_TIM1_CLKIN (STM32L4_PCLK2_FREQUENCY) #define STM32L4_APB2_TIM8_CLKIN (STM32L4_PCLK2_FREQUENCY) #elif defined(MSI_CLOCK_CONFIG) /* Use the MSI; frequ = 4 MHz; autotrim from LSE */ #define STM32L4_BOARD_USEMSI 1 #define STM32L4_BOARD_MSIRANGE RCC_CR_MSIRANGE_4M /* XXX sysclk mux = pllclk */ /* XXX pll source mux = msi */ /* Prescaler common to all PLL inputs */ #define STM32L4_PLLCFG_PLLM RCC_PLLCFG_PLLM(1) /* 'main' PLL config; we use this to generate our system clock */ #define STM32L4_PLLCFG_PLLN RCC_PLLCFG_PLLN(40) #define STM32L4_PLLCFG_PLLP 0 #undef STM32L4_PLLCFG_PLLP_ENABLED #define STM32L4_PLLCFG_PLLQ 0 #undef STM32L4_PLLCFG_PLLQ_ENABLED #define STM32L4_PLLCFG_PLLR RCC_PLLCFG_PLLR_2 #define STM32L4_PLLCFG_PLLR_ENABLED /* 'SAIPLL1' is used to generate the 48 MHz clock */ #define STM32L4_PLLSAI1CFG_PLLN RCC_PLLSAI1CFG_PLLN(24) #define STM32L4_PLLSAI1CFG_PLLP 0 #undef STM32L4_PLLSAI1CFG_PLLP_ENABLED #define STM32L4_PLLSAI1CFG_PLLQ RCC_PLLSAI1CFG_PLLQ_2 #define STM32L4_PLLSAI1CFG_PLLQ_ENABLED #define STM32L4_PLLSAI1CFG_PLLR 0 #undef STM32L4_PLLSAI1CFG_PLLR_ENABLED /* 'SAIPLL2' is not used in this application */ #define STM32L4_PLLSAI2CFG_PLLN RCC_PLLSAI2CFG_PLLN(8) #define STM32L4_PLLSAI2CFG_PLLP 0 #undef STM32L4_PLLSAI2CFG_PLLP_ENABLED #define STM32L4_PLLSAI2CFG_PLLR 0 #undef STM32L4_PLLSAI2CFG_PLLR_ENABLED #define STM32L4_SYSCLK_FREQUENCY 80000000ul /* Enable CLK48; get it from PLLSAI1 */ #define STM32L4_USE_CLK48 #define STM32L4_CLK48_SEL RCC_CCIPR_CLK48SEL_PLLSAI1 /* Enable LSE (for the RTC) */ #define STM32L4_USE_LSE 1 /* Configure the HCLK divisor (for the AHB bus, core, memory, and DMA */ #define STM32L4_RCC_CFGR_HPRE RCC_CFGR_HPRE_SYSCLK /* HCLK = SYSCLK / 1 */ #define STM32L4_HCLK_FREQUENCY STM32L4_SYSCLK_FREQUENCY #define STM32L4_BOARD_HCLK STM32L4_HCLK_FREQUENCY /* Same as above, to satisfy compiler */ /* Configure the APB1 prescaler */ #define STM32L4_RCC_CFGR_PPRE1 RCC_CFGR_PPRE1_HCLK /* PCLK1 = HCLK / 1 */ #define STM32L4_PCLK1_FREQUENCY (STM32L4_HCLK_FREQUENCY / 1) #define STM32L4_APB1_TIM2_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM3_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM4_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM5_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM6_CLKIN (STM32L4_PCLK1_FREQUENCY) #define STM32L4_APB1_TIM7_CLKIN (STM32L4_PCLK1_FREQUENCY) /* Configure the APB2 prescaler */ #define STM32L4_RCC_CFGR_PPRE2 RCC_CFGR_PPRE2_HCLK /* PCLK2 = HCLK / 1 */ #define STM32L4_PCLK2_FREQUENCY (STM32L4_HCLK_FREQUENCY / 1) #define STM32L4_APB2_TIM1_CLKIN (STM32L4_PCLK2_FREQUENCY) #define STM32L4_APB2_TIM8_CLKIN (STM32L4_PCLK2_FREQUENCY) #endif /* The timer clock frequencies are automatically defined by hardware. * If the APB prescaler equals 1, the timer clock frequencies are set to the same * frequency as that of the APB domain. Otherwise they are set to twice. * Note: TIM1,8,15,16,17 are on APB2, others on APB1 */ #define BOARD_TIM1_FREQUENCY STM32L4_HCLK_FREQUENCY #define BOARD_TIM2_FREQUENCY STM32L4_HCLK_FREQUENCY #define BOARD_TIM3_FREQUENCY STM32L4_HCLK_FREQUENCY #define BOARD_TIM4_FREQUENCY STM32L4_HCLK_FREQUENCY #define BOARD_TIM5_FREQUENCY STM32L4_HCLK_FREQUENCY #define BOARD_TIM6_FREQUENCY STM32L4_HCLK_FREQUENCY #define BOARD_TIM7_FREQUENCY STM32L4_HCLK_FREQUENCY #define BOARD_TIM8_FREQUENCY STM32L4_HCLK_FREQUENCY #define BOARD_TIM15_FREQUENCY STM32L4_HCLK_FREQUENCY #define BOARD_TIM16_FREQUENCY STM32L4_HCLK_FREQUENCY #define BOARD_TIM17_FREQUENCY STM32L4_HCLK_FREQUENCY #define BOARD_LPTIM1_FREQUENCY STM32L4_HCLK_FREQUENCY #define BOARD_LPTIM2_FREQUENCY STM32L4_HCLK_FREQUENCY /**************************************************************************** * Public Data ****************************************************************************/ #ifndef __ASSEMBLY__ #undef EXTERN #if defined(__cplusplus) #define EXTERN extern "C" extern "C" { #else #define EXTERN extern #endif /**************************************************************************** * Public Function Prototypes ****************************************************************************/ #undef EXTERN #if defined(__cplusplus) } #endif #endif /* __ASSEMBLY__ */ #endif /* __BOARDS_ARM_STM32L4_STM32L476VG_DISCO_INCLUDE_STM32L476VG_DISCO_CLOCKING_H */