您好，歡迎進(jìn)入深圳市穎特新科技有限公司官方網(wǎng)站！
您好，歡迎進(jìn)入深圳市穎特新科技有限公司官方網(wǎng)站！
今天來說說新唐庫函數(shù)的寫法講解，一般來說，我們給寄存器定義地址或分配地址，無外乎就是宏定義或者結(jié)構(gòu)體，而新塘呢，同樣也是如此，作為C高級語言，一般上升到M0,M4就會有大量的寄存器和配置參數(shù)，但是相對來說，性能也會提高。
typedef struct { /** * PWRCON * =================================================================================================== * Offset: 0x00 System Power Down Control Register * --------------------------------------------------------------------------------------------------- * |Bits |Field |Descriptions * | :----: | :----: | :---- | * |[0] |XTL12M_EN |External Crystal Oscillator Control * | | |The bit default value is set by flash controller user configuration register config0 [26:24]. * | | |When the default clock source is from external crystal. The bit is auto set to "1" * | | |1 = Crystal oscillation enable * | | |0 = Crystal oscillation disable * |[2] |OSC22M_EN |Internal 22.1184 MHz Oscillator Control * | | |1 = 22.1184 MHz Oscillation enable * | | |0 = 22.1184 MHz Oscillation disable * |[3] |OSC10K_EN |Internal 10KHz Oscillator Control * | | |1 = 10KHz Oscillation enable * | | |0 = 10KHz Oscillation disable * |[4] |PD_WU_DLY |Enable the wake up delay counter. * | | |When the chip wakes up from power down mode, the clock control will delay certain clock * | | |cycles to wait system clock stable. * | | |The delayed clock cycle is 4096 clock cycles when chip work at external crystal (4 ~ * | | |24MHz), and 256 clock cycles when chip work at 22.1184 MHz oscillator. * | | |1 = Enable the clock cycle delay * | | |0 = Disable the clock cycle delay * |[5] |PD_WU_INT_EN|Power down mode wake Up Interrupt Enable * | | |0 = Disable * | | |1 = Enable. The interrupt will occur when Power down mode (Deep Sleep Mode) wakeup. * |[6] |PD_WU_STS |Chip power down wake up status flag * | | |Set by "power down wake up", it indicates that resume from power down mode * | | |The flag is set if the GPIO(P0~P4), UART wakeup * | | |Write 1 to clear the bit * | | |Note: This bit is working only if PD_WU_INT_EN (PWRCON[5]) set to 1. * |[7] |PWR_DOWN_EN |System power down enable bit * | | |When set this bit "1", the chip power down mode is enabled and the chip power down active * | | |is depend on the PD_WAIT_CPU bit * | | |(a) if the PD_WAIT_CPU is "0" then the chip power down after the PWR_DOWN_EN bit set. * | | |(b) if the PD_WAIT_CPU is "1" then the chip keep active till the CPU sleep mode also active * | | |and then the chip power down * | | |When chip wake up from power down, this bit is auto cleared, user need to set this bit again * | | |for next power down. * | | |When in power down mode, external crystal (4~ 24MHz) and the 22.1184 MHz OSC will be * | | |disabled in this mode, but the 10 kHz OSC is not controlled by power down mode. * | | |When in power down mode, the PLL and system clock are disabled, and ignored the clock * | | |source selection. The clocks of peripheral are not controlled by power down mode, if the * | | |peripheral clock source is from 10 kHz oscillator. * | | |1 = Chip enter the power down mode instant or wait CPU sleep command WFI * | | |0 = Chip operate in normal mode or CPU in idle mode (sleep mode) because of WFI * | | |command * |[8] |PD_WAIT_CPU |This bit control the power down entry condition * | | |1 = Chip entry power down mode when the both PWR_DOWN and CPU run WFI instruction. * | | |0 = Chip entry power down mode when the PWR_DOWN bit is set to 1 */ __IO uint32_t PWRCON; /** * AHBCLK * =================================================================================================== * Offset: 0x04 AHB Devices Clock Enable Control Register * --------------------------------------------------------------------------------------------------- * |Bits |Field |Descriptions * | :----: | :----: | :---- | * |[2] |ISP_EN |Flash ISP Controller Clock Enable Control. * | | |1 = To enable the Flash ISP controller clock. * | | |0 = To disable the Flash ISP controller clock. * |[3] |EBI_EN |EBI Controller Clock Enable Control. * | | |1 = To enable the EBI Controller clock. * | | |0 = To disable the EBI Controller clock. * |[4] |HDIV_EN |Divider Controller Clock Enable Control. * | | |1 = To enable the Divider Controller clock. * | | |0 = To disable the Divider Controller clock. */ __IO uint32_t AHBCLK; /** * APBCLK * =================================================================================================== * Offset: 0x08 APB Devices Clock Enable Control Register * --------------------------------------------------------------------------------------------------- * |Bits |Field |Descriptions * | :----: | :----: | :---- | * |[0] |WDT_EN |Watch Dog Timer Clock Enable. * | | |This bit is the protected bit, program this need a open lock sequence, write "59h","16h","88h" to * | | |address 0x5000_0100 to un-lock this bit. Reference the register REGWRPROT at address * | | |GCR_BA + 0x100 * | | |0 = Disable Watchdog Timer Clock * | | |1 = Enable Watchdog Timer Clock * |[2] |TMR0_EN |Timer0 Clock Enable Control * | | |0 = Disable Timer0 Clock * | | |1 = Enable Timer0 Clock * |[3] |TMR1_EN |Timer1 Clock Enable Control * | | |0 = Disable Timer1 Clock * | | |1 = Enable Timer1 Clock * |[4] |TMR2_EN |Timer2 Clock Enable Control * | | |0 = Disable Timer2 Clock * | | |1 = Enable Timer2 Clock * |[5] |TMR3_EN |Timer3 Clock Enable Control * | | |0 = Disable Timer3 Clock * | | |1 = Enable Timer3 Clock * |[6] |FDIV_EN |Clock Divider Clock Enable Control * | | |0 = Disable FDIV Clock * | | |1 = Enable FDIV Clock * |[8] |I2C_EN |I2C Clock Enable Control. * | | |0 = Disable I2C Clock * | | |1 = Enable I2C Clock * |[12] |SPI0_EN |SPI0 Clock Enable Control. * | | |0 = Disable SPI0 Clock * | | |1 = Enable SPI0 Clock * |[13] |SPI1_EN |SPI1 Clock Enable Control. * | | |0 = Disable SPI1 Clock * | | |1 = Enable SPI1 Clock * |[16] |UART0_EN |UART0 Clock Enable Control. * | | |1 = Enable UART0 clock * | | |0 = Disable UART0 clock * |[17] |UART1_EN |UART1 Clock Enable Control. * | | |1 = Enable UART1 clock * | | |0 = Disable UART1 clock * |[20] |PWM01_EN |PWM_01 Clock Enable Control. * | | |1 = Enable PWM01 clock * | | |0 = Disable PWM01 clock * |[21] |PWM23_EN |PWM_23 Clock Enable Control. * | | |1 = Enable PWM23 clock * | | |0 = Disable PWM23 clock * |[22] |PWM45_EN |PWM_45 Clock Enable Control. * | | |1 = Enable PWM45 clock * | | |0 = Disable PWM45 clock * |[23] |PWM67_EN |PWM_67 Clock Enable Control. * | | |1 = Enable PWM67 clock * | | |0 = Disable PWM67 clock * |[28] |ADC_EN |Analog-Digital-Converter (ADC) Clock Enable Control. * | | |1 = Enable ADC clock * | | |0 = Disable ADC clock */ __IO uint32_t APBCLK; /** * CLKSTATUS * =================================================================================================== * Offset: 0x0C Clock Status Monitor Register * --------------------------------------------------------------------------------------------------- * |Bits |Field |Descriptions * | :----: | :----: | :---- | * |[0] |XTL12M_STB |XTL12M clock source stable flag * | | |1 = External Crystal clock is stable * | | |0 = External Crystal clock is not stable or not enable * |[2] |PLL_STB |PLL clock source stable flag * | | |1 = PLL clock is stable * | | |0 = PLL clock is not stable or not enable * |[3] |OSC10K_STB |OSC10K clock source stable flag * | | |1 = OSC10K clock is stable * | | |0 = OSC10K clock is not stable or not enable * |[4] |OSC22M_STB |OSC22M clock source stable flag * | | |1 = OSC22M clock is stable * | | |0 = OSC22M clock is not stable or not enable * |[7] |CLK_SW_FAIL|Clock switch fail flag * | | |1 = Clock switch fail * | | |0 = Clock switch success * | | |This bit will be set when target switch clock source is not stable. Write 1 to clear this bit to zero. */ __IO uint32_t CLKSTATUS; /** * CLKSEL0 * =================================================================================================== * Offset: 0x10 Clock Source Select Control Register 0 * --------------------------------------------------------------------------------------------------- * |Bits |Field |Descriptions * | :----: | :----: | :---- | * |[2:0] |HCLK_S |HCLK clock source select. * | | |Note: * | | |1. Before clock switch the related clock sources (pre-select and new-select) must be turn on * | | |2. The 3-bit default value is reloaded with the value of Config0.CFOSC[26:24] in user * | | |configuration register in Flash controller by any reset. Therefore the default value is either * | | |000b or 111b. * | | |3. These bits are protected bit, program this need an open lock sequence, write * | | |"59h","16h","88h" to address 0x5000_0100 to un-lock this bit. Reference the register * | | |REGWRPROT at address GCR_BA + 0x100 * | | |000 = clock source from external crystal clock (4 ~ 24MHz) * | | |010 = clock source from PLL clock * | | |011 = clock source from internal 10KHz oscillator clock * | | |111 = clock source from internal 22.1184 MHz oscillator clock * | | |others = Reserved * |[5:3] |STCLK_S |MCU Cortex_M0 SysTick clock source select. * | | |These bits are protected bit, program this need an open lock sequence, write "59h","16h","88h" to * | | |address 0x5000_0100 to un-lock this bit. Reference the register REGWRPROT at address GCR_BA * | | |+ 0x100 * | | |000 = Clock source from external crystal clock (4 ~ 24MHz) * | | |010 = Clock source from external crystal clock (4 ~ 24MHz)/2 * | | |011 = clock source from HCLK/2 * | | |1xx = clock source from internal 22.1184 MHz oscillator clock/2 */ __IO uint32_t CLKSEL0; /** * CLKSEL1 * =================================================================================================== * Offset: 0x14 Clock Source Select Control Register 1 * --------------------------------------------------------------------------------------------------- * |Bits |Field |Descriptions * | :----: | :----: | :---- | * |[1:0] |WDT_S |Watchdog Timer clock source select. * | | |These bits are protected bit, program this need a open lock sequence, write "59h","16h","88h" to * | | |address 0x5000_0100 to un-lock this bit. Reference the register REGWRPROT at address * | | |GCR_BA + 0x100 * | | |00 = clock source from external crystal clock (4 ~ 24MHz). * | | |10 = clock source from HCLK/2048 clock * | | |11 = clock source from internal 10KHz oscillator clock * |[3:2] |ADC_S |ADC clock source select. * | | |00 = clock source from external crystal clock (4 ~ 24MHz). * | | |01 = clock source from PLL clock * | | |1x = clock source from internal 22.1184 MHz oscillator clock * |[10:8] |TMR0_S |TIMER0 clock source select. * | | |000 = clock source from external crystal clock (4 ~ 24MHz) * | | |010 = clock source from HCLK * | | |011 = clock source from external trigger * | | |1xx = clock source from internal 22.1184 MHz oscillator clock * |[14:12] |TMR1_S |TIMER1 clock source select. * | | |000 = clock source from external crystal clock (4 ~ 24MHz) * | | |010 = clock source from HCLK * | | |011 = clock source from external trigger * | | |1xx = clock source from internal 22.1184 MHz oscillator clock * |[18:16] |TMR2_S |TIMER2 clock source select. * | | |000 = clock source from external crystal clock (4 ~ 24MHz) * | | |010 = clock source from HCLK * | | |011 = clock source from external trigger * | | |1xx = clock source from internal 22.1184 MHz oscillator clock * |[22:20] |TMR3_S |TIMER3 clock source select. * | | |000 = clock source from external crystal clock (4 ~ 24MHz) * | | |010 = clock source from HCLK * | | |011 = clock source from external trigger * | | |1xx = clock source from internal 22.1184 MHz oscillator clock * |[25:24] |UART_S |UART clock source select. * | | |00 = clock source from external crystal clock (4 ~ 24MHz) * | | |01 = clock source from PLL clock * | | |1x = clock source from internal 22.1184 MHz oscillator clock * |[29:28] |PWM01_S |PWM0 and PWM1 clock source select. * | | |PWM0 and PWM1 uses the same Engine clock source, both of them with the same pre-scalar * | | |00 = clock source from external crystal clock (4 ~ 24MHz) * | | |10 = clock source from HCLK * | | |11 = clock source from internal 22.1184 MHz oscillator clock * |[31:30] |PWM23_S |PWM2 and PWM3 clock source select. * | | |PWM2 and PWM3 uses the same Engine clock source, both of them with the same pre-scalar * | | |00 = clock source from external crystal clock (4 ~ 24MHz) * | | |10 = clock source from HCLK * | | |11 = clock source from internal 22.1184 MHz oscillator clock */ __IO uint32_t CLKSEL1; /** * CLKDIV * =================================================================================================== * Offset: 0x18 Clock Divider Number Register * --------------------------------------------------------------------------------------------------- * |Bits |Field |Descriptions * | :----: | :----: | :---- | * |[3:0] |HCLK_N |HCLK clock divide number from HCLK clock source * | | |The HCLK clock frequency = (HCLK clock source frequency) / (HCLK_N + 1) * |[11:8] |UART_N |UART clock divide number from UART clock source * | | |The UART clock frequency = (UART clock source frequency ) / (UART_N + 1) * |[23:16] |ADC_N |ADC clock divide number from ADC clock source * | | |The ADC clock frequency = (ADC clock source frequency ) / (ADC_N + 1) */ __IO uint32_t CLKDIV; /** * CLKSEL2 * =================================================================================================== * Offset: 0x1C Clock Source Select Control Register 2 * --------------------------------------------------------------------------------------------------- * |Bits |Field |Descriptions * | :----: | :----: | :---- | * |[3:2] |FRQDIV_S |Clock Divider Clock Source Select * | | |00 = clock source from external crystal clock (4 ~ 24MHz) * | | |10 = clock source from HCLK * | | |11 = clock source from internal 22.1184 MHz oscillator clock * |[5:4] |PWM45_S |PWM4 and PWM5 clock source select. - PWM4 and PWM5 used the same Engine clock source, * | | |both of them with the same pre-scalar * | | |00 = clock source from external crystal clock (4 ~ 24MHz) * | | |10 = clock source from HCLK * | | |11 = clock source from internal 22.1184 MHz oscillator clock * |[7:6] |PWM67_S |PWM6 and PWM7 clock source select. - PWM6 and PWM7 used the same Engine clock source, * | | |both of them with the same pre-scalar * | | |00 = clock source from external crystal clock (4 ~ 24MHz) * | | |10 = clock source from HCLK * | | |11 = clock source from internal 22.1184 MHz oscillator clock */ __IO uint32_t CLKSEL2; /** * PLLCON * =================================================================================================== * Offset: 0x20 PLL Control Register * --------------------------------------------------------------------------------------------------- * |Bits |Field |Descriptions * | :----: | :----: | :---- | * |[8:0] |FB_DV |PLL Feedback Divider Control Pins (PLL_F[8:0]) * |[13:9] |IN_DV |PLL Input Divider Control Pins (PLL_R[4:0]) * |[15:14] |OUT_DV |PLL Output Divider Control Pins (PLL_OD[1:0]) * |[16] |PD |Power Down Mode. * | | |If set the IDLE bit "1" in PWRCON register, the PLL will enter power down mode too * | | |0 = PLL is in normal mode (default) * | | |1 = PLL is in power-down mode * |[17] |BP |PLL Bypass Control * | | |0 = PLL is in normal mode (default) * | | |1 = PLL clock output is same as clock input (XTALin) * |[18] |OE |PLL OE (FOUT enable) pin Control * | | |0 = PLL FOUT enable * | | |1 = PLL FOUT is fixed low * |[19] |PLL_SRC |PLL Source Clock Select * | | |1 = PLL source clock from 22.1184 MHz oscillator * | | |0 = PLL source clock from external crystal clock (4 ~ 24 MHz) */ __IO uint32_t PLLCON; /** * FRQDIV * =================================================================================================== * Offset: 0x24 Frequency Divider Control Register * --------------------------------------------------------------------------------------------------- * |Bits |Field |Descriptions * | :----: | :----: | :---- | * |[3:0] |FSEL |Divider Output Frequency Selection Bits * | | |The formula of output frequency is * | | |Fout = Fin/2(N+1), * | | |where Fin is the input clock frequency, Fout is the frequency of divider output clock, N is the 4-bit * | | |value of FSEL[3:0]. * |[4] |DIVIDER_EN|Frequency Divider Enable Bit * | | |0 = Disable Frequency Divider * | | |1 = Enable Frequency Divider */ __IO uint32_t FRQDIV; } CLK_T; /** @addtogroup CLK_CONST CLK Bit Field Definition Constant Definitions for CLK Controller @{ */ /* CLK PWRCON Bit Field Definitions */ #define CLK_PWRCON_PD_WAIT_CPU_Pos 8 /*!< CLK PWRCON: PD_WAIT_CPU Position */ #define CLK_PWRCON_PD_WAIT_CPU_Msk (1ul << CLK_PWRCON_PD_WAIT_CPU_Pos) /*!< CLK PWRCON: PD_WAIT_CPU Mask */ #define CLK_PWRCON_PWR_DOWN_EN_Pos 7 /*!< CLK PWRCON: PWR_DOWN_EN Position */ #define CLK_PWRCON_PWR_DOWN_EN_Msk (1ul << CLK_PWRCON_PWR_DOWN_EN_Pos) /*!< CLK PWRCON: PWR_DOWN_EN Mask */ #define CLK_PWRCON_PD_WU_STS_Pos 6 /*!< CLK PWRCON: PD_WU_STS Position */ #define CLK_PWRCON_PD_WU_STS_Msk (1ul << CLK_PWRCON_PD_WU_STS_Pos) /*!< CLK PWRCON: PD_WU_STS Mask */ #define CLK_PWRCON_PD_WU_INT_EN_Pos 5 /*!< CLK PWRCON: PD_WU_INT_EN Position */ #define CLK_PWRCON_PD_WU_INT_EN_Msk (1ul << CLK_PWRCON_PD_WU_INT_EN_Pos) /*!< CLK PWRCON: PD_WU_INT_EN Mask */ #define CLK_PWRCON_PD_WU_DLY_Pos 4 /*!< CLK PWRCON: PD_WU_DLY Position */ #define CLK_PWRCON_PD_WU_DLY_Msk (1ul << CLK_PWRCON_PD_WU_DLY_Pos) /*!< CLK PWRCON: PD_WU_DLY Mask */ #define CLK_PWRCON_OSC10K_EN_Pos 3 /*!< CLK PWRCON: OSC10K_EN Position */ #define CLK_PWRCON_OSC10K_EN_Msk (1ul << CLK_PWRCON_OSC10K_EN_Pos) /*!< CLK PWRCON: OSC10K_EN Mask */ #define CLK_PWRCON_IRC10K_EN_Pos 3 /*!< CLK PWRCON: OSC10K_EN Position */ #define CLK_PWRCON_IRC10K_EN_Msk (1ul << CLK_PWRCON_OSC10K_EN_Pos) /*!< CLK PWRCON: OSC10K_EN Mask */ #define CLK_PWRCON_OSC22M_EN_Pos 2 /*!< CLK PWRCON: OSC22M_EN Position */ #define CLK_PWRCON_OSC22M_EN_Msk (1ul << CLK_PWRCON_OSC22M_EN_Pos) /*!< CLK PWRCON: OSC22M_EN Mask */ #define CLK_PWRCON_IRC22M_EN_Pos 2 /*!< CLK PWRCON: OSC22M_EN Position */ #define CLK_PWRCON_IRC22M_EN_Msk (1ul << CLK_PWRCON_OSC22M_EN_Pos) /*!< CLK PWRCON: OSC22M_EN Mask */ #define CLK_PWRCON_XTL12M_EN_Pos 0 /*!< CLK PWRCON: XTL12M_EN Position */ #define CLK_PWRCON_XTL12M_EN_Msk (1ul << CLK_PWRCON_XTL12M_EN_Pos) /*!< CLK PWRCON: XTL12M_EN Mask */ /* CLK AHBCLK Bit Field Definitions */ #define CLK_AHBCLK_HDIV_EN_Pos 4 /*!< CLK AHBCLK: HDIV_EN Position */ #define CLK_AHBCLK_HDIV_EN_Msk (1ul << CLK_AHBCLK_HDIV_EN_Pos) /*!< CLK AHBCLK: HDIV_EN Mask */ #define CLK_AHBCLK_EBI_EN_Pos 3 /*!< CLK AHBCLK: EBI_EN Position */ #define CLK_AHBCLK_EBI_EN_Msk (1ul << CLK_AHBCLK_EBI_EN_Pos) /*!< CLK AHBCLK: EBI_EN Mask */ #define CLK_AHBCLK_ISP_EN_Pos 2 /*!< CLK AHBCLK: ISP_EN Position */ #define CLK_AHBCLK_ISP_EN_Msk (1ul << CLK_AHBCLK_ISP_EN_Pos) /*!< CLK AHBCLK: ISP_EN Mask */ /* CLK APBCLK Bit Field Definitions */ #define CLK_APBCLK_ACMP23_EN_Pos 31 /*!< CLK APBCLK: ACMP23_EN Position */ #define CLK_APBCLK_ACMP23_EN_Msk (1ul << CLK_APBCLK_ACMP23_EN_Pos) /*!< CLK APBCLK: ACMP23_EN Mask */ #define CLK_APBCLK_ACMP01_EN_Pos 30 /*!< CLK APBCLK: ACMP01_EN Position */ #define CLK_APBCLK_ACMP01_EN_Msk (1ul << CLK_APBCLK_ACMP01_EN_Pos) /*!< CLK APBCLK: ACMP01_EN Mask */ #define CLK_APBCLK_ADC_EN_Pos 28 /*!< CLK APBCLK: ADC_EN Position */ #define CLK_APBCLK_ADC_EN_Msk (1ul << CLK_APBCLK_ADC_EN_Pos) /*!< CLK APBCLK: ADC_EN Mask */ #define CLK_APBCLK_PWM67_EN_Pos 23 /*!< CLK APBCLK: PWM67_EN Position */ #define CLK_APBCLK_PWM67_EN_Msk (1ul << CLK_APBCLK_PWM67_EN_Pos) /*!< CLK APBCLK: PWM67_EN Mask */ #define CLK_APBCLK_PWM45_EN_Pos 22 /*!< CLK APBCLK: PWM45_EN Position */ #define CLK_APBCLK_PWM45_EN_Msk (1ul << CLK_APBCLK_PWM45_EN_Pos) /*!< CLK APBCLK: PWM45_EN Mask */ #define CLK_APBCLK_PWM23_EN_Pos 21 /*!< CLK APBCLK: PWM23_EN Position */ #define CLK_APBCLK_PWM23_EN_Msk (1ul << CLK_APBCLK_PWM23_EN_Pos) /*!< CLK APBCLK: PWM23_EN Mask */ #define CLK_APBCLK_PWM01_EN_Pos 20 /*!< CLK APBCLK: PWM01_EN Position */ #define CLK_APBCLK_PWM01_EN_Msk (1ul << CLK_APBCLK_PWM01_EN_Pos) /*!< CLK APBCLK: PWM01_EN Mask */ #define CLK_APBCLK_UART1_EN_Pos 17 /*!< CLK APBCLK: UART1_EN Position */ #define CLK_APBCLK_UART1_EN_Msk (1ul << CLK_APBCLK_UART1_EN_Pos) /*!< CLK APBCLK: UART1_EN Mask */ #define CLK_APBCLK_UART0_EN_Pos 16 /*!< CLK APBCLK: UART0_EN Position */ #define CLK_APBCLK_UART0_EN_Msk (1ul << CLK_APBCLK_UART0_EN_Pos) /*!< CLK APBCLK: UART0_EN Mask */ #define CLK_APBCLK_SPI1_EN_Pos 13 /*!< CLK APBCLK: SPI1_EN Position */ #define CLK_APBCLK_SPI1_EN_Msk (1ul << CLK_APBCLK_SPI1_EN_Pos) /*!< CLK APBCLK: SPI1_EN Mask */ #define CLK_APBCLK_SPI0_EN_Pos 12 /*!< CLK APBCLK: SPI0_EN Position */ #define CLK_APBCLK_SPI0_EN_Msk (1ul << CLK_APBCLK_SPI0_EN_Pos) /*!< CLK APBCLK: SPI0_EN Mask */ #define CLK_APBCLK_I2C1_EN_Pos 9 /*!< CLK APBCLK: I2C1_EN Position */ #define CLK_APBCLK_I2C1_EN_Msk (1ul << CLK_APBCLK_I2C1_EN_Pos) /*!< CLK APBCLK: I2C1_EN Mask */ #define CLK_APBCLK_I2C0_EN_Pos 8 /*!< CLK APBCLK: I2C0_EN Position */ #define CLK_APBCLK_I2C0_EN_Msk (1ul << CLK_APBCLK_I2C0_EN_Pos) /*!< CLK APBCLK: I2C0_EN Mask */ #define CLK_APBCLK_I2C_EN_Pos 8 /*!< CLK APBCLK: I2C_EN Position */ #define CLK_APBCLK_I2C_EN_Msk (1ul << CLK_APBCLK_I2C_EN_Pos) /*!< CLK APBCLK: I2C_EN Mask */ #define CLK_APBCLK_FDIV_EN_Pos 6 /*!< CLK APBCLK: FDIV_EN Position */ #define CLK_APBCLK_FDIV_EN_Msk (1ul << CLK_APBCLK_FDIV_EN_Pos) /*!< CLK APBCLK: FDIV_EN Mask */ #define CLK_APBCLK_TMR3_EN_Pos 5 /*!< CLK APBCLK: TMR3_EN Position */ #define CLK_APBCLK_TMR3_EN_Msk (1ul << CLK_APBCLK_TMR3_EN_Pos) /*!< CLK APBCLK: TMR3_EN Mask */ #define CLK_APBCLK_TMR2_EN_Pos 4 /*!< CLK APBCLK: TMR2_EN Position */ #define CLK_APBCLK_TMR2_EN_Msk (1ul << CLK_APBCLK_TMR2_EN_Pos) /*!< CLK APBCLK: TMR2_EN Mask */ #define CLK_APBCLK_TMR1_EN_Pos 3 /*!< CLK APBCLK: TMR1_EN Position */ #define CLK_APBCLK_TMR1_EN_Msk (1ul << CLK_APBCLK_TMR1_EN_Pos) /*!< CLK APBCLK: TMR1_EN Mask */ #define CLK_APBCLK_TMR0_EN_Pos 2 /*!< CLK APBCLK: TMR0_EN Position */ #define CLK_APBCLK_TMR0_EN_Msk (1ul << CLK_APBCLK_TMR0_EN_Pos) /*!< CLK APBCLK: TMR0_EN Mask */ #define CLK_APBCLK_WDT_EN_Pos 0 /*!< CLK APBCLK: WDT_EN Position */ #define CLK_APBCLK_WDT_EN_Msk (1ul << CLK_APBCLK_WDT_EN_Pos) /*!< CLK APBCLK: WDT_EN Mask */ /* CLK CLKSTATUS Bit Field Definitions */ #define CLK_CLKSTATUS_CLK_SW_FAIL_Pos 7 /*!< CLK CLKSTATUS: CLK_SW_FAIL Position */ #define CLK_CLKSTATUS_CLK_SW_FAIL_Msk (1ul << CLK_CLKSTATUS_CLK_SW_FAIL_Pos)/*!< CLK CLKSTATUS: CLK_SW_FAIL Mask */ #define CLK_CLKSTATUS_OSC22M_STB_Pos 4 /*!< CLK CLKSTATUS: OSC22M_STB Position */ #define CLK_CLKSTATUS_OSC22M_STB_Msk (1ul << CLK_CLKSTATUS_OSC22M_STB_Pos)/*!< CLK CLKSTATUS: OSC22M_STB Mask */ #define CLK_CLKSTATUS_IRC22M_STB_Pos 4 /*!< CLK CLKSTATUS: IRC22M_STB Position */ #define CLK_CLKSTATUS_IRC22M_STB_Msk (1ul << CLK_CLKSTATUS_IRC22M_STB_Pos)/*!< CLK CLKSTATUS: IRC22M_STB Mask */ #define CLK_CLKSTATUS_OSC10K_STB_Pos 3 /*!< CLK CLKSTATUS: OSC10K_STB Position */ #define CLK_CLKSTATUS_OSC10K_STB_Msk (1ul << CLK_CLKSTATUS_OSC10K_STB_Pos)/*!< CLK CLKSTATUS: OSC10K_STB Mask */ #define CLK_CLKSTATUS_IRC10K_STB_Pos 3 /*!< CLK CLKSTATUS: IRC10K_STB Position */ #define CLK_CLKSTATUS_IRC10K_STB_Msk (1ul << CLK_CLKSTATUS_IRC10K_STB_Pos)/*!< CLK CLKSTATUS: IRC10K_STB Mask */ #define CLK_CLKSTATUS_PLL_STB_Pos 2 /*!< CLK CLKSTATUS: PLL_STB Position */ #define CLK_CLKSTATUS_PLL_STB_Msk (1ul << CLK_CLKSTATUS_PLL_STB_Pos) /*!< CLK CLKSTATUS: PLL_STB Mask */ #define CLK_CLKSTATUS_XTL12M_STB_Pos 0 /*!< CLK CLKSTATUS: XTL12M_STB Position */ #define CLK_CLKSTATUS_XTL12M_STB_Msk (1ul << CLK_CLKSTATUS_XTL12M_STB_Pos)/*!< CLK CLKSTATUS: XTL12M_STB Mask */ /* CLK CLKSEL0 Bit Field Definitions */ #define CLK_CLKSEL0_STCLK_S_Pos 3 /*!< CLK CLKSEL0: STCLK_S Position */ #define CLK_CLKSEL0_STCLK_S_Msk (7ul << CLK_CLKSEL0_STCLK_S_Pos) /*!< CLK CLKSEL0: STCLK_S Mask */ #define CLK_CLKSEL0_HCLK_S_Pos 0 /*!< CLK CLKSEL0: HCLK_S Position */ #define CLK_CLKSEL0_HCLK_S_Msk (7ul << CLK_CLKSEL0_HCLK_S_Pos) /*!< CLK CLKSEL0: HCLK_S Mask */ /* CLK CLKSEL1 Bit Field Definitions */ #define CLK_CLKSEL1_PWM23_S_Pos 30 /*!< CLK CLKSEL1: PWM23_S Position */ #define CLK_CLKSEL1_PWM23_S_Msk (3ul << CLK_CLKSEL1_PWM23_S_Pos) /*!< CLK CLKSEL1: PWM23_S Mask */ #define CLK_CLKSEL1_PWM01_S_Pos 28 /*!< CLK CLKSEL1: PWM01_S Position */ #define CLK_CLKSEL1_PWM01_S_Msk (3ul << CLK_CLKSEL1_PWM01_S_Pos) /*!< CLK CLKSEL1: PWM01_S Mask */ #define CLK_CLKSEL1_UART_S_Pos 24 /*!< CLK CLKSEL1: UART_S Position */ #define CLK_CLKSEL1_UART_S_Msk (3ul << CLK_CLKSEL1_UART_S_Pos) /*!< CLK CLKSEL1: UART_S Mask */ #define CLK_CLKSEL1_TMR3_S_Pos 20 /*!< CLK CLKSEL1: TMR3_S Position */ #define CLK_CLKSEL1_TMR3_S_Msk (7ul << CLK_CLKSEL1_TMR3_S_Pos) /*!< CLK CLKSEL1: TMR3_S Mask */ #define CLK_CLKSEL1_TMR2_S_Pos 16 /*!< CLK CLKSEL1: TMR2_S Position */ #define CLK_CLKSEL1_TMR2_S_Msk (7ul << CLK_CLKSEL1_TMR2_S_Pos) /*!< CLK CLKSEL1: TMR2_S Mask */ #define CLK_CLKSEL1_TMR1_S_Pos 12 /*!< CLK CLKSEL1: TMR1_S Position */ #define CLK_CLKSEL1_TMR1_S_Msk (7ul << CLK_CLKSEL1_TMR1_S_Pos) /*!< CLK CLKSEL1: TMR1_S Mask */ #define CLK_CLKSEL1_TMR0_S_Pos 8 /*!< CLK CLKSEL1: TMR0_S Position */ #define CLK_CLKSEL1_TMR0_S_Msk (7ul << CLK_CLKSEL1_TMR0_S_Pos) /*!< CLK CLKSEL1: TMR0_S Mask */ #define CLK_CLKSEL1_SPI1_S_Pos 5 /*!< CLK CLKSEL1: SPI1_S Position */ #define CLK_CLKSEL1_SPI1_S_Msk (1ul << CLK_CLKSEL1_SPI1_S_Pos) /*!< CLK CLKSEL1: SPI1_S Mask */ #define CLK_CLKSEL1_SPI0_S_Pos 4 /*!< CLK CLKSEL1: SPI0_S Position */ #define CLK_CLKSEL1_SPI0_S_Msk (1ul << CLK_CLKSEL1_SPI0_S_Pos) /*!< CLK CLKSEL1: SPI0_S Mask */ #define CLK_CLKSEL1_ADC_S_Pos 2 /*!< CLK CLKSEL1: ADC_S Position */ #define CLK_CLKSEL1_ADC_S_Msk (3ul << CLK_CLKSEL1_ADC_S_Pos) /*!< CLK CLKSEL1: ADC_S Mask */ #define CLK_CLKSEL1_WDT_S_Pos 0 /*!< CLK CLKSEL1: WDT_S Position */ #define CLK_CLKSEL1_WDT_S_Msk (3ul << CLK_CLKSEL1_WDT_S_Pos) /*!< CLK CLKSEL1: WDT_S Mask */ /* CLK CLKSEL2 Bit Field Definitions */ #define CLK_CLKSEL2_WWDT_S_Pos 16 /*!< CLK CLKSEL2: WWDT_S Position */ #define CLK_CLKSEL2_WWDT_S_Msk (3ul << CLK_CLKSEL2_WWDT_S_Pos) /*!< CLK CLKSEL2: WWDT_S Mask */ #define CLK_CLKSEL2_PWM67_S_Pos 6 /*!< CLK CLKSEL2: PWM67_S Position */ #define CLK_CLKSEL2_PWM67_S_Msk (3ul << CLK_CLKSEL2_PWM67_S_Pos) /*!< CLK CLKSEL2: PWM67_S Mask */ #define CLK_CLKSEL2_PWM45_S_Pos 4 /*!< CLK CLKSEL2: PWM45_S Position */ #define CLK_CLKSEL2_PWM45_S_Msk (3ul << CLK_CLKSEL2_PWM45_S_Pos) /*!< CLK CLKSEL2: PWM45_S Mask */ #define CLK_CLKSEL2_FRQDIV_S_Pos 2 /*!< CLK CLKSEL2: FRQDIV_S Position */ #define CLK_CLKSEL2_FRQDIV_S_Msk (3ul << CLK_CLKSEL2_FRQDIV_S_Pos) /*!< CLK CLKSEL2: FRQDIV_S Mask */ /* CLK CLKDIV Bit Field Definitions */ #define CLK_CLKDIV_ADC_N_Pos 16 /*!< CLK CLKDIV: ADC_N Position */ #define CLK_CLKDIV_ADC_N_Msk (0xFFul << CLK_CLKDIV_ADC_N_Pos) /*!< CLK CLKDIV: ADC_N Mask */ #define CLK_CLKDIV_UART_N_Pos 8 /*!< CLK CLKDIV: UART_N Position */ #define CLK_CLKDIV_UART_N_Msk (0xFul << CLK_CLKDIV_UART_N_Pos) /*!< CLK CLKDIV: UART_N Mask */ #define CLK_CLKDIV_HCLK_N_Pos 0 /*!< CLK CLKDIV: HCLK_N Position */ #define CLK_CLKDIV_HCLK_N_Msk (0xFul << CLK_CLKDIV_HCLK_N_Pos) /*!< CLK CLKDIV: HCLK_N Mask */ /* CLK PLLCON Bit Field Definitions */ #define CLK_PLLCON_PLL_SRC_Pos 19 /*!< CLK PLLCON: PLL_SRC Position */ #define CLK_PLLCON_PLL_SRC_Msk (1ul << CLK_PLLCON_PLL_SRC_Pos) /*!< CLK PLLCON: PLL_SRC Mask */ #define CLK_PLLCON_OE_Pos 18 /*!< CLK PLLCON: OE Position */ #define CLK_PLLCON_OE_Msk (1ul << CLK_PLLCON_OE_Pos) /*!< CLK PLLCON: OE Mask */ #define CLK_PLLCON_BP_Pos 17 /*!< CLK PLLCON: BP Position */ #define CLK_PLLCON_BP_Msk (1ul << CLK_PLLCON_BP_Pos) /*!< CLK PLLCON: BP Mask */ #define CLK_PLLCON_PD_Pos 16 /*!< CLK PLLCON: PD Position */ #define CLK_PLLCON_PD_Msk (1ul << CLK_PLLCON_PD_Pos) /*!< CLK PLLCON: PD Mask */ #define CLK_PLLCON_OUT_DV_Pos 14 /*!< CLK PLLCON: OUT_DV Position */ #define CLK_PLLCON_OUT_DV_Msk (3ul << CLK_PLLCON_OUT_DV_Pos) /*!< CLK PLLCON: OUT_DV Mask */ #define CLK_PLLCON_IN_DV_Pos 9 /*!< CLK PLLCON: IN_DV Position */ #define CLK_PLLCON_IN_DV_Msk (0x1Ful << CLK_PLLCON_IN_DV_Pos) /*!< CLK PLLCON: IN_DV Mask */ #define CLK_PLLCON_FB_DV_Pos 0 /*!< CLK PLLCON: FB_DV Position */ #define CLK_PLLCON_FB_DV_Msk (0x1FFul << CLK_PLLCON_FB_DV_Pos) /*!< CLK PLLCON: FB_DV Mask */ /* CLK FRQDIV Bit Field Definitions */ #define CLK_FRQDIV_DIVIDER1_Pos 5 /*!< CLK FRQDIV: DIVIDER1 Position */ #define CLK_FRQDIV_DIVIDER1_Msk (1ul << CLK_FRQDIV_DIVIDER1_Pos) /*!< CLK FRQDIV: DIVIDER1 Mask */ #define CLK_FRQDIV_DIVIDER_EN_Pos 4 /*!< CLK FRQDIV: DIVIDER_EN Position */ #define CLK_FRQDIV_DIVIDER_EN_Msk (1ul << CLK_FRQDIV_DIVIDER_EN_Pos) /*!< CLK FRQDIV: DIVIDER_EN Mask */ #define CLK_FRQDIV_FSEL_Pos 0 /*!< CLK FRQDIV: FSEL Position */ #define CLK_FRQDIV_FSEL_Msk (0xFul << CLK_FRQDIV_FSEL_Pos) /*!< CLK FRQDIV: FSEL Mask */ /**@}*/ /* CLK_CONST */ /**@}*/ /* CLK */
void SYS_Init(void) { /*---------------------------------------------------------------------------------------------------------*/ /* Init System Clock */ /*---------------------------------------------------------------------------------------------------------*/ /* Enable Internal RC 22.1184MHz clock */ CLK->PWRCON |= CLK_PWRCON_OSC22M_EN_Msk; /* Waiting for Internal RC clock ready */ while(!(CLK->CLKSTATUS & CLK_CLKSTATUS_OSC22M_STB_Msk)); /* Switch HCLK clock source to Internal RC and and HCLK source divide 1 */ CLK->CLKSEL0 &= ~CLK_CLKSEL0_HCLK_S_Msk; CLK->CLKSEL0 |= CLK_CLKSEL0_HCLK_S_HIRC; CLK->CLKDIV &= ~CLK_CLKDIV_HCLK_N_Msk; CLK->CLKDIV |= (CLK_CLKDIV_HCLK(1) << CLK_CLKDIV_HCLK_N_Msk); /* Enable external XTAL 12MHz clock */ CLK->PWRCON |= CLK_PWRCON_XTL12M_EN_Msk; /* Waiting for external XTAL clock ready */ while(!(CLK->CLKSTATUS & CLK_CLKSTATUS_XTL12M_STB_Msk)); /* Set core clock as PLL_CLOCK from PLL */ CLK->PLLCON = PLLCON_SETTING; while(!(CLK->CLKSTATUS & CLK_CLKSTATUS_PLL_STB_Msk)); CLK->CLKSEL0 &= (~CLK_CLKSEL0_HCLK_S_Msk); CLK->CLKSEL0 |= CLK_CLKSEL0_HCLK_S_PLL; /* Update System Core Clock */ /* User can use SystemCoreClockUpdate() to calculate PllClock, SystemCoreClock and CycylesPerUs automatically. */ //SystemCoreClockUpdate(); PllClock = PLL_CLOCK; // PLL SystemCoreClock = PLL_CLOCK / 1; // HCLK CyclesPerUs = PLL_CLOCK / 1000000; // For SYS_SysTickDelay() /* Enable UART module clock */ CLK->APBCLK |= CLK_APBCLK_UART0_EN_Msk; /* Select UART module clock source */ CLK->CLKSEL1 &= ~CLK_CLKSEL1_UART_S_Msk; CLK->CLKSEL1 |= CLK_CLKSEL1_UART_S_HXT; /*---------------------------------------------------------------------------------------------------------*/ /* Init I/O Multi-function */ /*---------------------------------------------------------------------------------------------------------*/ /* Set P3 multi-function pins for UART0 RXD , TXD and CKO */ SYS->P3_MFP &= ~(SYS_MFP_P30_Msk | SYS_MFP_P31_Msk | SYS_MFP_P36_Msk); SYS->P3_MFP |= (SYS_MFP_P30_RXD0 | SYS_MFP_P31_TXD0 | SYS_MFP_P36_CKO); } void UART0_Init() { /*---------------------------------------------------------------------------------------------------------*/ /* Init UART */ /*---------------------------------------------------------------------------------------------------------*/ /* Reset UART IP */ SYS->IPRSTC2 |= SYS_IPRSTC2_UART0_RST_Msk; SYS->IPRSTC2 &= ~SYS_IPRSTC2_UART0_RST_Msk; /* Configure UART0 and set UART0 Baudrate */ UART0->BAUD = UART_BAUD_MODE2 | UART_BAUD_MODE2_DIVIDER(__HXT, 115200); UART0->LCR = UART_WORD_LEN_8 | UART_PARITY_NONE | UART_STOP_BIT_1; }
vc++中的編譯器默認(rèn)的對齊字節(jié)數(shù)是8個字節(jié)，那么變量是按照一個什么樣的方式存儲在內(nèi)存中的呢？？是按照有效對齊字節(jié)數(shù)存儲的，什么是有效內(nèi)存對齊字節(jié)數(shù)呢？即指定的內(nèi)存對齊字節(jié)數(shù)與自身的內(nèi)存對齊字節(jié)數(shù)二者之間取小，比如下面這個結(jié)構(gòu)體：
struct abc
{
int a;
char rfu； /*預(yù)留字節(jié)*/
char b[3] ;
float c;
double d;
} i , j;
int a的有效內(nèi)存對齊字節(jié)數(shù)是4（編譯器默認(rèn)的是8，而a自身內(nèi)存對齊字節(jié)數(shù)是4 ，二者取小就是4 ） ，那么對于a來說就必須要對齊到內(nèi)存地址值是4的倍數(shù)的地址上，同樣的道理char rfu 的內(nèi)存對齊字節(jié)數(shù)是1 ，float c內(nèi)存對齊字節(jié)數(shù)是8 ， double d內(nèi)存對齊字節(jié)數(shù)也是8 ; 對于char b[3]這個char類型的數(shù)組來說它的對齊是按照char類型的有效對齊字節(jié)數(shù)對齊也就是對齊到地址值是1的倍數(shù)的地址上（也就是任意的地址上），
假設(shè)從地址00開始存儲的話：
那么這個結(jié)構(gòu)體的內(nèi)存存儲形式是：
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 （地址是十六進(jìn)制的)
a rfu b[0] b[1] b[2] c d
最后還要保證這個結(jié)構(gòu)體也要對齊，結(jié)構(gòu)體的內(nèi)存對齊字節(jié)數(shù)是該結(jié)構(gòu)體成員中的有效內(nèi)存對齊字節(jié)數(shù)與默認(rèn)的內(nèi)存對齊字節(jié)數(shù)中取大的那個，也就是8 ，整個結(jié)構(gòu)體的字節(jié)數(shù)是24 ，正好能夠被8圓整！因此這個結(jié)構(gòu)體的字節(jié)數(shù)是24 ！這個地方我加入了 char rfu；剛好能使最后的整個結(jié)構(gòu)體字節(jié)數(shù)為24，要是去掉這個，也就是說最后的整個結(jié)構(gòu)體的字節(jié)數(shù)不為結(jié)構(gòu)體成員中的有效內(nèi)存對齊字節(jié)數(shù)中取大的那個的整數(shù)倍，那從哪里補(bǔ)齊呢？是在最后，也就是d后面會自動補(bǔ)上一個char類型嗎？
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 （地址是十六進(jìn)制的)
a b[0] b[1] b[2] cc c d
如果你沒有加那個char rfu的話就會在后面添加一個字節(jié)，這是因為要保證float f這個數(shù)據(jù)對齊到地址值是8的地址上，因為其內(nèi)存對齊字節(jié)數(shù)是8 ，這樣仍然是24個字節(jié)！
各位盟友請教一個問題！我最近在學(xué)習(xí)新唐的cortex-m0這款單片機(jī)遇到一個棘手的問題。我想把單片機(jī)系統(tǒng)時鐘設(shè)置到48M去工作可是總是測試的時候是12M一直沒有成功而且在用到while(!(SYSCLK->CLKSTATUS.PLL_STB));這條語句的時候一直跳不過去！下面我把我配置的代碼貼出來麻煩大家?guī)兔纯！謝謝！
UNLOCKREG();
SYSCLK->PWRCON.XTL12M_EN = 1;
while(!(SYSCLK->CLKSTATUS.XTL12M_STB));
SYSCLK->PLLCON.PLL_SRC = 1;
SYSCLK->PLLCON.OE = 0;
SYSCLK->PLLCON.PD = 0;
SYSCLK->PLLCON.OUT_DV = 3;
SYSCLK->PLLCON.IN_DV = 1;
SYSCLK->PLLCON.FB_DV = 46;
SYSCLK->CLKSEL0.HCLK_S = 2;
while(!(SYSCLK->CLKSTATUS.PLL_STB));
LOCKREG();
我知道原因了，這個地方只能用延時等待穩(wěn)定！（NUC100）
明白了？
下一篇：中央處理器
掃碼關(guān)注我們
傳真：0755-82591176
郵箱：vicky@yingtexin.net
地址：深圳市龍華區(qū)民治街道民治大道973萬眾潤豐創(chuàng)業(yè)園A棟2樓A08
