text: 
  #ifndef __ARCH_ARM_SRC_STM32_CHIP_STM32F37XXX_RCC_H
  #define __ARCH_ARM_SRC_STM32_CHIP_STM32F37XXX_RCC_H
  
  /************************************************************************************
   * Pre-processor Definitions
   ************************************************************************************/
  
  /* Register Offsets *****************************************************************/
  
  #define STM32_RCC_CR_OFFSET         0x0000  /* Clock control register */
  #define STM32_RCC_CFGR_OFFSET       0x0004  /* Clock configuration register */
  #define STM32_RCC_CIR_OFFSET        0x0008  /* Clock interrupt register */
  #define STM32_RCC_APB2RSTR_OFFSET   0x000c  /* APB2 Peripheral reset register */
  #define STM32_RCC_APB1RSTR_OFFSET   0x0010  /* APB1 Peripheral reset register */
  #define STM32_RCC_AHBENR_OFFSET     0x0014  /* AHB Peripheral Clock enable register */
  #define STM32_RCC_APB2ENR_OFFSET    0x0018  /* APB2 Peripheral Clock enable register */
  #define STM32_RCC_APB1ENR_OFFSET    0x001c  /* APB1 Peripheral Clock enable register */
  #define STM32_RCC_BDCR_OFFSET       0x0020  /* Backup domain control register */
  #define STM32_RCC_CSR_OFFSET        0x0024  /* Control/status register */
  #define STM32_RCC_AHBRSTR_OFFSET    0x0028  /* AHB Reset register */
  #define STM32_RCC_CFGR2_OFFSET      0x002c  /* Clock configuration register 2 */
  #define STM32_RCC_CFGR3_OFFSET      0x0030  /* Clock configuration register 3 */
  
  /* Register Addresses ***************************************************************/
  
  #define STM32_RCC_CR                (STM32_RCC_BASE+STM32_RCC_CR_OFFSET)
  #define STM32_RCC_CFGR              (STM32_RCC_BASE+STM32_RCC_CFGR_OFFSET)
  #define STM32_RCC_CIR               (STM32_RCC_BASE+STM32_RCC_CIR_OFFSET)
  #define STM32_RCC_APB2RSTR          (STM32_RCC_BASE+STM32_RCC_APB2RSTR_OFFSET)
  #define STM32_RCC_APB1RSTR          (STM32_RCC_BASE+STM32_RCC_APB1RSTR_OFFSET)
  #define STM32_RCC_AHBENR            (STM32_RCC_BASE+STM32_RCC_AHBENR_OFFSET)
  #define STM32_RCC_APB2ENR           (STM32_RCC_BASE+STM32_RCC_APB2ENR_OFFSET)
  #define STM32_RCC_APB1ENR           (STM32_RCC_BASE+STM32_RCC_APB1ENR_OFFSET)
  #define STM32_RCC_BDCR              (STM32_RCC_BASE+STM32_RCC_BDCR_OFFSET)
  #define STM32_RCC_CSR               (STM32_RCC_BASE+STM32_RCC_CSR_OFFSET)
  #define STM32_RCC_AHBRSTR           (STM32_RCC_BASE+STM32_RCC_AHBRSTR_OFFSET)
  #define STM32_RCC_CFGR2             (STM32_RCC_BASE+STM32_RCC_CFGR2_OFFSET)
  #define STM32_RCC_CFGR3             (STM32_RCC_BASE+STM32_RCC_CFGR3_OFFSET)
  
  /* Register Bitfield Definitions ****************************************************/
  
  /* Clock control register */
  
  #define RCC_CR_HSION                (1 << 0)  /* Bit 0: Internal High Speed clock enable */
  #define RCC_CR_HSIRDY               (1 << 1)  /* Bit 1: Internal High Speed clock ready flag */
  #define RCC_CR_HSITRIM_SHIFT        (3)       /* Bits 7-3: Internal High Speed clock trimming */
  #define RCC_CR_HSITRIM_MASK         (0x1f << RCC_CR_HSITRIM_SHIFT)
  #define RCC_CR_HSICAL_SHIFT         (8)       /* Bits 15-8: Internal High Speed clock Calibration */
  #define RCC_CR_HSICAL_MASK          (0xff << RCC_CR_HSICAL_SHIFT)
  #define RCC_CR_HSEON                (1 << 16) /* Bit 16: External High Speed clock enable */
  #define RCC_CR_HSERDY               (1 << 17) /* Bit 17: External High Speed clock ready flag */
  #define RCC_CR_HSEBYP               (1 << 18) /* Bit 18: External High Speed clock Bypass */
  #define RCC_CR_CSSON                (1 << 19) /* Bit 19: Clock Security System enable */
  #define RCC_CR_PLLON                (1 << 24) /* Bit 24: PLL enable */
  #define RCC_CR_PLLRDY               (1 << 25) /* Bit 25: PLL clock ready flag */
  
  /* Clock configuration register */
  
  #define RCC_CFGR_SW_SHIFT           (0)       /* Bits 1-0: System clock Switch */
  #define RCC_CFGR_SW_MASK            (3 << RCC_CFGR_SW_SHIFT)
  #  define RCC_CFGR_SW_HSI           (0 << RCC_CFGR_SW_SHIFT) /* 00: HSI selected as system clock */
  #  define RCC_CFGR_SW_HSE           (1 << RCC_CFGR_SW_SHIFT) /* 01: HSE selected as system clock */
  #  define RCC_CFGR_SW_PLL           (2 << RCC_CFGR_SW_SHIFT) /* 10: PLL selected as system clock */
  #define RCC_CFGR_SWS_SHIFT          (2)       /* Bits 3-2: System Clock Switch Status */
  #define RCC_CFGR_SWS_MASK           (3 << RCC_CFGR_SWS_SHIFT)
  #  define RCC_CFGR_SWS_HSI          (0 << RCC_CFGR_SWS_SHIFT) /* 00: HSI oscillator used as system clock */
  #  define RCC_CFGR_SWS_HSE          (1 << RCC_CFGR_SWS_SHIFT) /* 01: HSE oscillator used as system clock */
  #  define RCC_CFGR_SWS_PLL          (2 << RCC_CFGR_SWS_SHIFT) /* 10: PLL used as system clock */
  #define RCC_CFGR_HPRE_SHIFT         (4)       /* Bits 7-4: AHB prescaler */
  #define RCC_CFGR_HPRE_MASK          (0x0f << RCC_CFGR_HPRE_SHIFT)
  #  define RCC_CFGR_HPRE_SYSCLK      (0 << RCC_CFGR_HPRE_SHIFT) /* 0xxx: SYSCLK not divided */
  #  define RCC_CFGR_HPRE_SYSCLKd2    (8 << RCC_CFGR_HPRE_SHIFT) /* 1000: SYSCLK divided by 2 */
  #  define RCC_CFGR_HPRE_SYSCLKd4    (9 << RCC_CFGR_HPRE_SHIFT) /* 1001: SYSCLK divided by 4 */
  #  define RCC_CFGR_HPRE_SYSCLKd8    (10 << RCC_CFGR_HPRE_SHIFT) /* 1010: SYSCLK divided by 8 */
  #  define RCC_CFGR_HPRE_SYSCLKd16   (11 << RCC_CFGR_HPRE_SHIFT) /* 1011: SYSCLK divided by 16 */
  #  define RCC_CFGR_HPRE_SYSCLKd64   (12 << RCC_CFGR_HPRE_SHIFT) /* 1100: SYSCLK divided by 64 */
  #  define RCC_CFGR_HPRE_SYSCLKd128  (13 << RCC_CFGR_HPRE_SHIFT) /* 1101: SYSCLK divided by 128 */
  #  define RCC_CFGR_HPRE_SYSCLKd256  (14 << RCC_CFGR_HPRE_SHIFT) /* 1110: SYSCLK divided by 256 */
  #  define RCC_CFGR_HPRE_SYSCLKd512  (15 << RCC_CFGR_HPRE_SHIFT) /* 1111: SYSCLK divided by 512 */
  #define RCC_CFGR_PPRE1_SHIFT        (8)       /* Bits 10-8: APB Low speed prescaler (APB1) */
  #define RCC_CFGR_PPRE1_MASK         (7 << RCC_CFGR_PPRE1_SHIFT)
  #  define RCC_CFGR_PPRE1_HCLK       (0 << RCC_CFGR_PPRE1_SHIFT) /* 0xx: HCLK not divided */
  #  define RCC_CFGR_PPRE1_HCLKd2     (4 << RCC_CFGR_PPRE1_SHIFT) /* 100: HCLK divided by 2 */
  #  define RCC_CFGR_PPRE1_HCLKd4     (5 << RCC_CFGR_PPRE1_SHIFT) /* 101: HCLK divided by 4 */
  #  define RCC_CFGR_PPRE1_HCLKd8     (6 << RCC_CFGR_PPRE1_SHIFT) /* 110: HCLK divided by 8 */
  #  define RCC_CFGR_PPRE1_HCLKd16    (7 << RCC_CFGR_PPRE1_SHIFT) /* 111: HCLK divided by 16 */
  #define RCC_CFGR_PPRE2_SHIFT        (11)      /* Bits 13-11: APB High speed prescaler (APB2) */
  #define RCC_CFGR_PPRE2_MASK         (7 << RCC_CFGR_PPRE2_SHIFT)
  #  define RCC_CFGR_PPRE2_HCLK       (0 << RCC_CFGR_PPRE2_SHIFT) /* 0xx: HCLK not divided */
  #  define RCC_CFGR_PPRE2_HCLKd2     (4 << RCC_CFGR_PPRE2_SHIFT) /* 100: HCLK divided by 2 */
  #  define RCC_CFGR_PPRE2_HCLKd4     (5 << RCC_CFGR_PPRE2_SHIFT) /* 101: HCLK divided by 4 */
  #  define RCC_CFGR_PPRE2_HCLKd8     (6 << RCC_CFGR_PPRE2_SHIFT) /* 110: HCLK divided by 8 */
  #  define RCC_CFGR_PPRE2_HCLKd16    (7 << RCC_CFGR_PPRE2_SHIFT) /* 111: HCLK divided by 16 */
  #define RCC_CFGR_ADCPRE_SHIFT       (13) /* Bits 14-15: ADC prescaler */
  #define RCC_CFGR_ADCPRE_MASK        (7 << RCC_CFGR_ADCPRE_SHIFT)
  #  define RCC_CFGR_ADCPRE_PCLKd2    (0 << RCC_CFGR_ADCPRE_SHIFT) /* 00: PCLK divided by 2 */
  #  define RCC_CFGR_ADCPRE_PCLKd4    (1 << RCC_CFGR_ADCPRE_SHIFT) /* 01: PCLK divided by 4 */
  #  define RCC_CFGR_ADCPRE_PCLKd6    (2 << RCC_CFGR_ADCPRE_SHIFT) /* 10: PCLK divided by 6 */
  #  define RCC_CFGR_ADCPRE_PCLKd8    (3 << RCC_CFGR_ADCPRE_SHIFT) /* 11: PCLK divided by 8 */
  #define RCC_CFGR_PLLSRC             (1 << 16) /* Bit 16: PLL entry clock source */
  #define RCC_CFGR_PLLXTPRE           (1 << 17) /* Bit 17: HSE divider for PLL entry */
  #define RCC_CFGR_PLLMUL_SHIFT       (18)      /* Bits 21-18: PLL Multiplication Factor */
  #define RCC_CFGR_PLLMUL_MASK        (0x0f << RCC_CFGR_PLLMUL_SHIFT)
  #  define RCC_CFGR_PLLMUL_CLKx2     (0 << RCC_CFGR_PLLMUL_SHIFT)  /* 0000: PLL input clock x 2 */
  #  define RCC_CFGR_PLLMUL_CLKx3     (1 << RCC_CFGR_PLLMUL_SHIFT)  /* 0001: PLL input clock x 3 */
  #  define RCC_CFGR_PLLMUL_CLKx4     (2 << RCC_CFGR_PLLMUL_SHIFT)  /* 0010: PLL input clock x 4 */
  #  define RCC_CFGR_PLLMUL_CLKx5     (3 << RCC_CFGR_PLLMUL_SHIFT)  /* 0011: PLL input clock x 5 */
  #  define RCC_CFGR_PLLMUL_CLKx6     (4 << RCC_CFGR_PLLMUL_SHIFT)  /* 0100: PLL input clock x 6 */
  #  define RCC_CFGR_PLLMUL_CLKx7     (5 << RCC_CFGR_PLLMUL_SHIFT)  /* 0101: PLL input clock x 7 */
  #  define RCC_CFGR_PLLMUL_CLKx8     (6 << RCC_CFGR_PLLMUL_SHIFT)  /* 0110: PLL input clock x 8 */
  #  define RCC_CFGR_PLLMUL_CLKx9     (7 << RCC_CFGR_PLLMUL_SHIFT)  /* 0111: PLL input clock x 9 */
  #  define RCC_CFGR_PLLMUL_CLKx10    (8 << RCC_CFGR_PLLMUL_SHIFT)  /* 1000: PLL input clock x 10 */
  #  define RCC_CFGR_PLLMUL_CLKx11    (9 << RCC_CFGR_PLLMUL_SHIFT)  /* 1001: PLL input clock x 11 */
  #  define RCC_CFGR_PLLMUL_CLKx12    (10 << RCC_CFGR_PLLMUL_SHIFT) /* 1010: PLL input clock x 12 */
  #  define RCC_CFGR_PLLMUL_CLKx13    (11 << RCC_CFGR_PLLMUL_SHIFT) /* 1011: PLL input clock x 13 */
  #  define RCC_CFGR_PLLMUL_CLKx14    (12 << RCC_CFGR_PLLMUL_SHIFT) /* 1100: PLL input clock x 14 */
  #  define RCC_CFGR_PLLMUL_CLKx15    (13 << RCC_CFGR_PLLMUL_SHIFT) /* 1101: PLL input clock x 15 */
  #  define RCC_CFGR_PLLMUL_CLKx16    (14 << RCC_CFGR_PLLMUL_SHIFT) /* 111x: PLL input clock x 16 */
  #define RCC_CFGR_USBPRE             (1 << 22) /* Bit 22: USB prescaler */
  #define RCC_CFGR_MCO_SHIFT          (24)      /* Bits 26-24: Microcontroller Clock Output */
  #define RCC_CFGR_MCO_MASK           (3 << RCC_CFGR_MCO_SHIFT)
  #  define RCC_CFGR_MCO_DISABLED     (0 << RCC_CFGR_MCO_SHIFT)  /* 000: MCO output disabled, no clock on MCO */
  #  define RCC_CFGR_MCO_LSICLK       (2 << RCC_CFGR_MCO_SHIFT)  /* 010: LSI clock selected */
  #  define RCC_CFGR_MCO_LSECLK       (3 << RCC_CFGR_MCO_SHIFT)  /* 011: LSE clock selected */
  #  define RCC_CFGR_MCO_SYSCLK       (4 << RCC_CFGR_MCO_SHIFT)  /* 100: System clock (SYSCLK) selected */
  #  define RCC_CFGR_MCO_HSICLK       (5 << RCC_CFGR_MCO_SHIFT)  /* 101: HSI clock selected */
  #  define RCC_CFGR_MCO_HSECLK       (6 << RCC_CFGR_MCO_SHIFT)  /* 101: HSE clock selected */
  #  define RCC_CFGR_PLLCLKd2         (7 << RCC_CFGR_MCO_SHIFT)  /* 111: PLL clock divided by 2 selected */
  #define RCC_CFGR_SDPRE_SHIFT        (27)      /* Bits 27-31: SDADC Prescaler */
  #define RCC_CFGR_SDPRE_MASK         (0x1f << RCC_CFGR_SDPRE_SHIFT)
  #  define RCC_CFGR_SDPRE_DIV2       (0 << RCC_CFGR_SDPRE_SHIFT)  /* 0xxxx: System clock divided by 2 */
  #  define RCC_CFGR_SDPRE_DIV4       (17 << RCC_CFGR_SDPRE_SHIFT) /* 10001: System clock divided by 4 */
  #  define RCC_CFGR_SDPRE_DIV6       (18 << RCC_CFGR_SDPRE_SHIFT) /* 10010: System clock divided by 6 */
  #  define RCC_CFGR_SDPRE_DIV8       (19 << RCC_CFGR_SDPRE_SHIFT) /* 10011: System clock divided by 8 */
  #  define RCC_CFGR_SDPRE_DIV10      (20 << RCC_CFGR_SDPRE_SHIFT) /* 10100: System clock divided by 10 */
  #  define RCC_CFGR_SDPRE_DIV12      (21 << RCC_CFGR_SDPRE_SHIFT) /* 10101: System clock divided by 12 */
  #  define RCC_CFGR_SDPRE_DIV14      (22 << RCC_CFGR_SDPRE_SHIFT) /* 10110: System clock divided by 14 */
  #  define RCC_CFGR_SDPRE_DIV16      (23 << RCC_CFGR_SDPRE_SHIFT) /* 10111: System clock divided by 16 */
  #  define RCC_CFGR_SDPRE_DIV20      (24 << RCC_CFGR_SDPRE_SHIFT) /* 11000: System clock divided by 20 */
  #  define RCC_CFGR_SDPRE_DIV24      (25 << RCC_CFGR_SDPRE_SHIFT) /* 11001: System clock divided by 24 */
  #  define RCC_CFGR_SDPRE_DIV28      (26 << RCC_CFGR_SDPRE_SHIFT) /* 11010: System clock divided by 28 */
  #  define RCC_CFGR_SDPRE_DIV32      (27 << RCC_CFGR_SDPRE_SHIFT) /* 11011: System clock divided by 32 */
  #  define RCC_CFGR_SDPRE_DIV36      (28 << RCC_CFGR_SDPRE_SHIFT) /* 11100: System clock divided by 36 */
  #  define RCC_CFGR_SDPRE_DIV40      (29 << RCC_CFGR_SDPRE_SHIFT) /* 11101: System clock divided by 40 */
  #  define RCC_CFGR_SDPRE_DIV44      (30 << RCC_CFGR_SDPRE_SHIFT) /* 11110: System clock divided by 44 */
  #  define RCC_CFGR_SDPRE_DIV48      (31 << RCC_CFGR_SDPRE_SHIFT) /* 11111: System clock divided by 48 */
  
  /* Clock interrupt register */
  
  #define RCC_CIR_LSIRDYF             (1 << 0)  /* Bit 0: LSI Ready Interrupt flag */
  #define RCC_CIR_LSERDYF             (1 << 1)  /* Bit 1: LSE Ready Interrupt flag */
  #define RCC_CIR_HSIRDYF             (1 << 2)  /* Bit 2: HSI Ready Interrupt flag */
  #define RCC_CIR_HSERDYF             (1 << 3)  /* Bit 3: HSE Ready Interrupt flag */
  #define RCC_CIR_PLLRDYF             (1 << 4)  /* Bit 4: PLL Ready Interrupt flag */
  #define RCC_CIR_CSSF                (1 << 7)  /* Bit 7: Clock Security System Interrupt flag */
  #define RCC_CIR_LSIRDYIE            (1 << 8)  /* Bit 8: LSI Ready Interrupt Enable */
  #define RCC_CIR_LSERDYIE            (1 << 9)  /* Bit 9: LSE Ready Interrupt Enable */
  #define RCC_CIR_HSIRDYIE            (1 << 10) /* Bit 10: HSI Ready Interrupt Enable */
  #define RCC_CIR_HSERDYIE            (1 << 11) /* Bit 11: HSE Ready Interrupt Enable */
  #define RCC_CIR_PLLRDYIE            (1 << 12) /* Bit 12: PLL Ready Interrupt Enable */
  #define RCC_CIR_LSIRDYC             (1 << 16) /* Bit 16: LSI Ready Interrupt Clear */
  #define RCC_CIR_LSERDYC             (1 << 17) /* Bit 17: LSE Ready Interrupt Clear */
  #define RCC_CIR_HSIRDYC             (1 << 18) /* Bit 18: HSI Ready Interrupt Clear */
  #define RCC_CIR_HSERDYC             (1 << 19) /* Bit 19: HSE Ready Interrupt Clear */
  #define RCC_CIR_PLLRDYC             (1 << 20) /* Bit 20: PLL Ready Interrupt Clear */
  #define RCC_CIR_CSSC                (1 << 23) /* Bit 23: Clock Security System Interrupt Clear */
  
  /* APB2 Peripheral reset register */
  
  #define RCC_APB2RSTR_SYSCFGRST      (1 << 0)  /* Bit 0: SYSCFG, Comparators and operational amplifiers reset */
  #define RCC_APB2RSTR_ADCRST         (1 << 9)  /* Bit 9: ADC reset */
  #define RCC_APB2RSTR_SPI1RST        (1 << 12) /* Bit 12: SPI 1 reset */
  #define RCC_APB2RSTR_USART1RST      (1 << 14) /* Bit 14: USART1 reset */
  #define RCC_APB2RSTR_TIM15RST       (1 << 16) /* Bit 16: TIM15 reset */
  #define RCC_APB2RSTR_TIM16RST       (1 << 17) /* Bit 17: TIM16 reset */
  #define RCC_APB2RSTR_TIM17RST       (1 << 18) /* Bit 18: TIM17 reset */
  #define RCC_APB2RSTR_TIM19RST       (1 << 19) /* Bit 19: TIM19 reset */
  #define RCC_APB2RSTR_SDADC1RST      (1 << 24) /* Bit 24: SDADC1 reset */
  #define RCC_APB2RSTR_SDADC2RST      (1 << 25) /* Bit 25: SDADC2 reset */
  #define RCC_APB2RSTR_SDADC3RST      (1 << 26) /* Bit 26: SDADC3 reset */
  
  /* APB1 Peripheral reset register */
  
  #define RCC_APB1RSTR_TIM2RST        (1 << 0)  /* Bit 0: Timer 2 reset */
  #define RCC_APB1RSTR_TIM3RST        (1 << 1)  /* Bit 1: Timer 3 reset */
  #define RCC_APB1RSTR_TIM4RST        (1 << 2)  /* Bit 2: Timer 4 reset */
  #define RCC_APB1RSTR_TIM5RST        (1 << 3)  /* Bit 2: Timer 5 reset */
  #define RCC_APB1RSTR_TIM6RST        (1 << 4)  /* Bit 4: Timer 6 reset */
  #define RCC_APB1RSTR_TIM7RST        (1 << 5)  /* Bit 5: Timer 7 reset */
  #define RCC_APB1RSTR_TIM12RST       (1 << 6)  /* Bit 6: Timer 12 reset */
  #define RCC_APB1RSTR_TIM13RST       (1 << 7)  /* Bit 7: Timer 13 reset */
  #define RCC_APB1RSTR_TIM14RST       (1 << 8)  /* Bit 8: Timer 14 reset */
  #define RCC_APB1RSTR_TIM18RST       (1 << 9)  /* Bit 9: Timer 18 reset */
  #define RCC_APB1RSTR_WWDGRST        (1 << 11) /* Bit 11: Window Watchdog reset */
  #define RCC_APB1RSTR_SPI2RST        (1 << 14) /* Bit 14: SPI 2 reset */
  #define RCC_APB1RSTR_SPI3RST        (1 << 15) /* Bit 15: SPI 3 reset */
  #define RCC_APB1RSTR_USART2RST      (1 << 17) /* Bit 17: USART 2 reset */
  #define RCC_APB1RSTR_USART3RST      (1 << 18) /* Bit 18: USART 3 reset */
  #define RCC_APB1RSTR_I2C1RST        (1 << 21) /* Bit 21: I2C 1 reset */
  #define RCC_APB1RSTR_I2C2RST        (1 << 22) /* Bit 22: I2C 2 reset */
  #define RCC_APB1RSTR_USBRST         (1 << 23) /* Bit 23: USB reset */
  #define RCC_APB1RSTR_CANRST         (1 << 25) /* Bit 25: CAN reset */
  #define RCC_APB1RSTR_CAN1RST        (1 << 25) /* Bit 25: CAN reset */
  #define RCC_APB1RSTR_DAC2RST        (1 << 26) /* Bit 26: DAC2 interface reset */
  #define RCC_APB1RSTR_PWRRST         (1 << 28) /* Bit 28: Power interface reset */
  #define RCC_APB1RSTR_DAC1RST        (1 << 29) /* Bit 29: DAC1 interface reset */
  #define RCC_APB1RSTR_CECRST         (1 << 30) /* Bit 30: CEC reset */
  
  /* AHB Peripheral Clock enable register */
  
  #define RCC_AHBENR_DMA1EN           (1 << 0)  /* Bit 0: DMA1 clock enable */
  #define RCC_AHBENR_DMA2EN           (1 << 1)  /* Bit 1: DMA2 clock enable */
  #define RCC_AHBENR_SRAMEN           (1 << 2)  /* Bit 2: SRAM interface clock enable */
  #define RCC_AHBENR_FLITFEN          (1 << 4)  /* Bit 4: FLITF clock enable */
  #define RCC_AHBENR_CRCEN            (1 << 6)  /* Bit 6: CRC clock enable */
  #define RCC_AHBENR_IOPAEN           (1 << 17) /* Bit 17: I/O port A clock enable */
  #define RCC_AHBENR_IOPBEN           (1 << 18) /* Bit 17: I/O port B clock enable */
  #define RCC_AHBENR_IOPCEN           (1 << 19) /* Bit 17: I/O port C clock enable */
  #define RCC_AHBENR_IOPDEN           (1 << 20) /* Bit 17: I/O port D clock enable */
  #define RCC_AHBENR_IOPEEN           (1 << 21) /* Bit 17: I/O port E clock enable */
  #define RCC_AHBENR_IOPFEN           (1 << 22) /* Bit 17: I/O port F clock enable */
  #define RCC_AHBENR_TSCEN            (1 << 24) /* Bit 24: TSCEN: Touch sensing controller clock enable */
  
  /* APB2 Peripheral Clock enable register */
  
  #define RCC_APB2ENR_SYSCFGEN        (1 << 0)  /* Bit 0: SYSCFG, Comparators and operational amplifiers clock enable */
  #define RCC_APB2ENR_ADC1EN          (1 << 9)  /* Bit 9: ADC1 clock enable */
  #define RCC_APB2ENR_SPI1EN          (1 << 12) /* Bit 12: SPI 1 clock enable */
  #define RCC_APB2ENR_USART1EN        (1 << 14) /* Bit 14: USART1 clock enable */
  #define RCC_APB2ENR_TIM15EN         (1 << 16) /* Bit 16: TIM15 clock enable */
  #define RCC_APB2ENR_TIM16EN         (1 << 17) /* Bit 17: TIM16 clock enable */
  #define RCC_APB2ENR_TIM17EN         (1 << 18) /* Bit 18: TIM17 clock enable */
  #define RCC_APB2ENR_TIM19EN         (1 << 19) /* Bit 19: TIM19 clock enable */
  #define RCC_APB2ENR_SDADC1EN        (1 << 24) /* Bit 24: SDADC1 clock enable */
  #define RCC_APB2ENR_SDADC2EN        (1 << 25) /* Bit 25: SDADC2 clock enable */
  #define RCC_APB2ENR_SDADC3EN        (1 << 26) /* Bit 26: SDADC3 clock enable */
  
  /* APB1 Peripheral Clock enable register */
  
  #define RCC_APB1ENR_TIM2EN          (1 << 0)  /* Bit 0: Timer 2 clock enable */
  #define RCC_APB1ENR_TIM3EN          (1 << 1)  /* Bit 1: Timer 3 clock enable */
  #define RCC_APB1ENR_TIM4EN          (1 << 2)  /* Bit 2: Timer 4 clock enable */
  #define RCC_APB1ENR_TIM5EN          (1 << 3)  /* Bit 2: Timer 5 clock enable */
  #define RCC_APB1ENR_TIM6EN          (1 << 4)  /* Bit 4: Timer 6 clock enable */
  #define RCC_APB1ENR_TIM7EN          (1 << 5)  /* Bit 5: Timer 7 clock enable */
  #define RCC_APB1ENR_TIM12EN         (1 << 6)  /* Bit 6: Timer 12 clock enable */
  #define RCC_APB1ENR_TIM13EN         (1 << 7)  /* Bit 7: Timer 13 clock enable */
  #define RCC_APB1ENR_TIM14EN         (1 << 8)  /* Bit 8: Timer 14 clock enable */
  #define RCC_APB1ENR_TIM18EN         (1 << 9)  /* Bit 9: Timer 18 clock enable */
  #define RCC_APB1ENR_WWDGEN          (1 << 11) /* Bit 11: Window Watchdog clock enable */
  #define RCC_APB1ENR_SPI2EN          (1 << 14) /* Bit 14: SPI 2 clock enable */
  #define RCC_APB1ENR_SPI3EN          (1 << 15) /* Bit 15: SPI 3 clock enable */
  #define RCC_APB1ENR_USART2EN        (1 << 17) /* Bit 17: USART 2 clock enable */
  #define RCC_APB1ENR_USART3EN        (1 << 18) /* Bit 18: USART 3 clock enable */
  #define RCC_APB1ENR_I2C1EN          (1 << 21) /* Bit 21: I2C 1 clock enable */
  #define RCC_APB1ENR_I2C2EN          (1 << 22) /* Bit 22: I2C 2 clock enable */
  #define RCC_APB1ENR_USBEN           (1 << 23) /* Bit 23: USB clock enable */
  #define RCC_APB1ENR_CANEN           (1 << 25) /* Bit 25: CAN clock enable */
  #define RCC_APB1ENR_DAC2EN          (1 << 26) /* Bit 26: DAC1 interface clock enable */
  #define RCC_APB1ENR_PWREN           (1 << 28) /* Bit 28: Power interface clock enable */
  #define RCC_APB1ENR_DAC1EN          (1 << 29) /* Bit 29: DAC1 interface clock enable */
  #define RCC_APB1ENR_CECEN           (1 << 30) /* Bit 30: CEC clock enable */
  
  /* Backup domain control register */
  
  #define RCC_BDCR_LSEON              (1 << 0)  /* Bit 0: External Low Speed oscillator enable */
  #define RCC_BDCR_LSERDY             (1 << 1)  /* Bit 1: External Low Speed oscillator Ready */
  #define RCC_BDCR_LSEBYP             (1 << 2)  /* Bit 2: External Low Speed oscillator Bypass */
  #define RCC_BDCR_LSEDRV_SHIFT       (3)       /* Bits 4:3: LSE oscillator drive capability */
  #define RCC_BDCR_LSEDRV_MASK        (3 << RCC_BDCR_LSEDRV_SHIFT)
  #  define RCC_BDCR_LSEDRV_LOW       (0 << RCC_BDCR_LSEDRV_SHIFT) /* 'Xtal mode' lower driving capability */
  #  define RCC_BDCR_LSEDRV_MEDLOW    (1 << RCC_BDCR_LSEDRV_SHIFT) /* 'Xtal mode' medium low driving capability */
  #  define RCC_BDCR_LSEDRV_MEDHIGH   (2 << RCC_BDCR_LSEDRV_SHIFT) /* 'Xtal mode' medium high driving capability */
  #  define RCC_BDCR_LSEDRV_HIGH      (3 << RCC_BDCR_LSEDRV_SHIFT) /* 'Xtal mode' higher driving capability */
  #define RCC_BDCR_RTCSEL_SHIFT       (8)       /* Bits 9:8: RTC clock source selection */
  #define RCC_BDCR_RTCSEL_MASK        (3 << RCC_BDCR_RTCSEL_SHIFT)
  #  define RCC_BDCR_RTCSEL_NOCLK     (0 << RCC_BDCR_RTCSEL_SHIFT) /* 00: No clock */
  #  define RCC_BDCR_RTCSEL_LSE       (1 << RCC_BDCR_RTCSEL_SHIFT) /* 01: LSE oscillator clock used as RTC clock */
  #  define RCC_BDCR_RTCSEL_LSI       (2 << RCC_BDCR_RTCSEL_SHIFT) /* 10: LSI oscillator clock used as RTC clock */
  #  define RCC_BDCR_RTCSEL_HSE       (3 << RCC_BDCR_RTCSEL_SHIFT) /* 11: HSE oscillator clock divided by 128 used as RTC clock */
  #define RCC_BDCR_RTCEN              (1 << 15) /* Bit 15: RTC clock enable */
  #define RCC_BDCR_BDRST              (1 << 16) /* Bit 16: Backup domain software reset */
  
  /* Control/status register */
  
  #define RCC_CSR_LSION               (1 << 0)  /* Bit 0: Internal Low Speed oscillator enable */
  #define RCC_CSR_LSIRDY              (1 << 1)  /* Bit 1: Internal Low Speed oscillator Ready */
  #define RCC_CSR_RMVF                (1 << 24) /* Bit 24: Remove reset flag */
  #define RCC_CSR_OBLRSTF             (1 << 25) /* Bit 25: Option byte loader reset flag */
  #define RCC_CSR_PINRSTF             (1 << 26) /* Bit 26: PIN reset flag */
  #define RCC_CSR_PORRSTF             (1 << 27) /* Bit 27: POR/PDR reset flag */
  #define RCC_CSR_SFTRSTF             (1 << 28) /* Bit 28: Software Reset flag */
  #define RCC_CSR_IWDGRSTF            (1 << 29) /* Bit 29: Independent Watchdog reset flag */
  #define RCC_CSR_WWDGRSTF            (1 << 30) /* Bit 30: Window watchdog reset flag */
  #define RCC_CSR_LPWRRSTF            (1 << 31) /* Bit 31: Low-Power reset flag */
  
  /* AHB peripheral clock reset register (RCC_AHBRSTR) */
  
  #define RCC_AHBRSTR_IOPARST         (1 << 17) /* Bit 17: I/O port A reset */
  #define RCC_AHBRSTR_IOPBRST         (1 << 18) /* Bit 18: I/O port B reset */
  #define RCC_AHBRSTR_IOPCRST         (1 << 29) /* Bit 19: I/O port C reset */
  #define RCC_AHBRSTR_IOPDRST         (1 << 20) /* Bit 20: I/O port D reset */
  #define RCC_AHBRSTR_IOPERST         (1 << 21) /* Bit 21: I/O port E reset */
  #define RCC_AHBRSTR_IOPFRST         (1 << 22) /* Bit 22: I/O port F reset */
  #define RCC_AHBRSTR_TSCRST          (1 << 24) /* Bit 24: Touch sensing controller reset */
  
  /* Clock configuration register 2 */
  
  #define RCC_CFGR2_PREDIV_SHIFT      (0)       /* Bits 0-3: PREDIV division factor */
  #define RCC_CFGR2_PREDIV_MASK       (15 << RCC_CFGR2_PREDIV_SHIFT)
  #  define RCC_CFGR2_PREDIVd1        (0 << RCC_CFGR2_PREDIV_SHIFT)  /* 0000: HSE input to PLL not divided */
  #  define RCC_CFGR2_PREDIVd2        (1 << RCC_CFGR2_PREDIV_SHIFT)  /* 0001: HSE input to PLL divided by 2 */
  #  define RCC_CFGR2_PREDIVd3        (2 << RCC_CFGR2_PREDIV_SHIFT)  /* 0010: HSE input to PLL divided by 3 */
  #  define RCC_CFGR2_PREDIVd4        (3 << RCC_CFGR2_PREDIV_SHIFT)  /* 0011: HSE input to PLL divided by 4 */
  #  define RCC_CFGR2_PREDIVd5        (4 << RCC_CFGR2_PREDIV_SHIFT)  /* 0100: HSE input to PLL divided by 5 */
  #  define RCC_CFGR2_PREDIVd6        (5 << RCC_CFGR2_PREDIV_SHIFT)  /* 0101: HSE input to PLL divided by 6 */
  #  define RCC_CFGR2_PREDIVd7        (6 << RCC_CFGR2_PREDIV_SHIFT)  /* 0110: HSE input to PLL divided by 7 */
  #  define RCC_CFGR2_PREDIVd8        (7 << RCC_CFGR2_PREDIV_SHIFT)  /* 0111: HSE input to PLL divided by 8 */
  #  define RCC_CFGR2_PREDIVd9        (8 << RCC_CFGR2_PREDIV_SHIFT)  /* 1000: HSE input to PLL divided by 9 */
  #  define RCC_CFGR2_PREDIVd10       (9 << RCC_CFGR2_PREDIV_SHIFT)  /* 1001: HSE input to PLL divided by 10 */
  #  define RCC_CFGR2_PREDIVd11       (10 << RCC_CFGR2_PREDIV_SHIFT) /* 1010: HSE input to PLL divided by 11 */
  #  define RCC_CFGR2_PREDIVd12       (11 << RCC_CFGR2_PREDIV_SHIFT) /* 1011: HSE input to PLL divided by 12 */
  #  define RCC_CFGR2_PREDIVd13       (12 << RCC_CFGR2_PREDIV_SHIFT) /* 1100: HSE input to PLL divided by 13 */
  #  define RCC_CFGR2_PREDIVd14       (13 << RCC_CFGR2_PREDIV_SHIFT) /* 1101: HSE input to PLL divided by 14 */
  #  define RCC_CFGR2_PREDIVd15       (14 << RCC_CFGR2_PREDIV_SHIFT) /* 1110: HSE input to PLL divided by 15 */
  #  define RCC_CFGR2_PREDIVd16       (15 << RCC_CFGR2_PREDIV_SHIFT) /* 1111: HSE input to PLL divided by 16 */
  
  /* Clock configuration register 3 */
  
  #define RCC_CFGR3_USART1SW_SHIFT    (0)       /* Bits 0-1: USART1 clock source selection */
  #define RCC_CFGR3_USART1SW_MASK     (3 << RCC_CFGR3_USART1SW_SHIFT)
  #  define RCC_CFGR3_USART1SW_PCLK   (0 << RCC_CFGR3_USART1SW_SHIFT) /* PCLK */
  #  define RCC_CFGR3_USART1SW_SYSCLK (1 << RCC_CFGR3_USART1SW_SHIFT) /* System clock (SYSCLK) */
  #  define RCC_CFGR3_USART1SW_LSE    (2 << RCC_CFGR3_USART1SW_SHIFT) /* LSE clock */
  #  define RCC_CFGR3_USART1SW_HSI    (0 << RCC_CFGR3_USART1SW_SHIFT) /* HSI clock */
  #define RCC_CFGR3_I2C1SW            (1 << 4)  /* Bit 4: I2C1 clock source selection */
  #define RCC_CFGR3_I2C2SW            (1 << 5)  /* Bit 5: I2C2 clock source selection */
  #define RCC_CFGR3_CECSW             (1 << 6)  /* Bit 6: CEC clock source selection */
  #define RCC_CFGR3_USART2SW_SHIFT    (16)      /* Bits 16-17: USART2 clock source selection */
  #define RCC_CFGR3_USART2SW_MASK     (3 << RCC_CFGR3_USART2SW_SHIFT)
  #  define RCC_CFGR3_USART2SW_PCLK   (0 << RCC_CFGR3_USART2SW_SHIFT) /* PCLK */
  #  define RCC_CFGR3_USART2SW_SYSCLK (1 << RCC_CFGR3_USART2SW_SHIFT) /* System clock (SYSCLK) */
  #  define RCC_CFGR3_USART2SW_LSE    (2 << RCC_CFGR3_USART2SW_SHIFT) /* LSE clock */
  #  define RCC_CFGR3_USART2SW_HSI    (0 << RCC_CFGR3_USART2SW_SHIFT) /* HSI clock */
  #define RCC_CFGR3_USART3SW_SHIFT    (18)      /* Bits 18-19: USART3 clock source selection */
  #define RCC_CFGR3_USART3SW_MASK     (3 << RCC_CFGR3_USART3SW_SHIFT)
  #  define RCC_CFGR3_USART3SW_PCLK   (0 << RCC_CFGR3_USART3SW_SHIFT) /* PCLK */
  #  define RCC_CFGR3_USART3SW_SYSCLK (1 << RCC_CFGR3_USART3SW_SHIFT) /* System clock (SYSCLK) */
  #  define RCC_CFGR3_USART3SW_LSE    (2 << RCC_CFGR3_USART3SW_SHIFT) /* LSE clock */
  #  define RCC_CFGR3_USART3SW_HSI    (0 << RCC_CFGR3_USART3SW_SHIFT) /* HSI clock */
  
  #endif /* __ARCH_ARM_SRC_STM32_CHIP_STM32F37XXX_RCC_H */
  
  