CC2538 System Control

SYS_CTRL

One and only instance of the System Control module. 

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( (cc2538_sys_ctrl_t*)0x400d2000 )
sys_clock_freq()

Compute the current system clock frequency based on the SYS_CTRL register states. 

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((uint32_t)\
    (SYS_CTRL->cc2538_sys_ctrl_clk_ctrl.CLOCK_CTRLbits.OSC ? \
               RCOSC16M_FREQ : XOSC32M_FREQ) >> \
    SYS_CTRL->cc2538_sys_ctrl_clk_ctrl.CLOCK_CTRLbits.SYS_DIV)
struct cc2538_sys_ctrl_t

System Control component registers.

cc2538.h::cc2538_reg_t CLOCK_CTRL

Clock control register.

cc2538.h::cc2538_reg_t SYS_DIV

System clock rate setting.

Current functional frequency for system clock.

cc2538.h::cc2538_reg_t RESERVED1

Reserved bits.

cc2538.h::cc2538_reg_t IO_DIV

I/O clock rate setting.

Current functional frequency for IO_CLK.

cc2538.h::cc2538_reg_t RESERVED2

Reserved bits.

cc2538.h::cc2538_reg_t OSC

System clock oscillator selection.

Current clock source selected.

cc2538.h::cc2538_reg_t OSC_PD

Oscillator power-down.

cc2538.h::cc2538_reg_t RESERVED3

Reserved bits.

cc2538.h::cc2538_reg_t AMP_DET

Amplitude detector of XOSC during power up.

cc2538.h::cc2538_reg_t RESERVED4

Reserved bits.

cc2538.h::cc2538_reg_t OSC32K

32-kHz clock oscillator selection

Current 32-kHz clock oscillator selected.

cc2538.h::cc2538_reg_t OSC32K_CADIS

Disable calibration 32-kHz RC oscillator.

cc2538.h::cc2538_reg_t RESERVED5

Reserved bits.

struct cc2538_sys_ctrl_t::@38::@43 CLOCK_CTRLbits
union cc2538_sys_ctrl_t::@38 cc2538_sys_ctrl_clk_ctrl

Clock control register.

cc2538.h::cc2538_reg_t CLOCK_STA

Clock status register.

cc2538.h::cc2538_reg_t RESERVED6

Reserved bits.

cc2538.h::cc2538_reg_t RESERVED7

Reserved bits.

cc2538.h::cc2538_reg_t HSOSC_STB

HSOSC stable status.

cc2538.h::cc2538_reg_t XOSC_STB

XOSC stable status.

cc2538.h::cc2538_reg_t SOURCE_CHANGE

System clock source change.

cc2538.h::cc2538_reg_t RESERVED8

Reserved bits.

cc2538.h::cc2538_reg_t RST

Last source of reset.

cc2538.h::cc2538_reg_t OSC32K_CALDIS

Disable calibration 32-kHz RC oscillator.

cc2538.h::cc2538_reg_t SYNC_32K

32-kHz clock source synced to undivided system clock (16 or 32 MHz)

cc2538.h::cc2538_reg_t RESERVED9

Reserved bits.

struct cc2538_sys_ctrl_t::@39::@44 CLOCK_STAbits
union cc2538_sys_ctrl_t::@39 cc2538_sys_ctrl_clk_sta

Clock status register.

cc2538.h::cc2538_reg_t RCGCGPT

Module clocks for GPT[3:0] when the CPU is in active (run) mode.

cc2538.h::cc2538_reg_t SCGCGPT

Module clocks for GPT[3:0] when the CPU is in sleep mode.

cc2538.h::cc2538_reg_t DCGCGPT

Module clocks for GPT[3:0] when the CPU is in PM0.

cc2538.h::cc2538_reg_t SRGPT

Reset for GPT[3:0].

cc2538.h::cc2538_reg_t RCGCSSI

Module clocks for SSI[1:0] when the CPU is in active (run) mode.

cc2538.h::cc2538_reg_t SCGCSSI

Module clocks for SSI[1:0] when the CPU is insSleep mode.

cc2538.h::cc2538_reg_t DCGCSSI

Module clocks for SSI[1:0] when the CPU is in PM0.

cc2538.h::cc2538_reg_t SRSSI

Reset for SSI[1:0].

cc2538.h::cc2538_reg_t RCGCUART

Module clocks for UART[1:0] when the CPU is in active (run) mode.

cc2538.h::cc2538_reg_t UART0

Enable UART0 clock in active (run) mode.

Enable UART0 clock in PM0.

Enable UART0 clock in sleep mode.

cc2538.h::cc2538_reg_t UART1

Enable UART1 clock in active (run) mode.

Enable UART1 clock in PM0.

Enable UART1 clock in sleep mode.

cc2538.h::cc2538_reg_t RESERVED

Reserved bits.

struct cc2538_sys_ctrl_t::@40::@45 RCGCUARTbits
union cc2538_sys_ctrl_t::@40 cc2538_sys_ctrl_unnamed1

UART module clock register - active mode.

cc2538.h::cc2538_reg_t SCGCUART

Module clocks for UART[1:0] when the CPU is in sleep mode.

struct cc2538_sys_ctrl_t::@41::@46 SCGCUARTbits
union cc2538_sys_ctrl_t::@41 cc2538_sys_ctrl_unnamed2

UART module clock register - sleep mode.

cc2538.h::cc2538_reg_t DCGCUART

Module clocks for UART[1:0] when the CPU is in PM0.

struct cc2538_sys_ctrl_t::@42::@47 DCGCUARTbits
union cc2538_sys_ctrl_t::@42 cc2538_sys_ctrl_unnamed3

UART module clock register - PM0 mode.

cc2538.h::cc2538_reg_t SRUART

Reset for UART[1:0].

cc2538.h::cc2538_reg_t RCGCI2C

Module clocks for I2C when the CPU is in active (run) mode.

cc2538.h::cc2538_reg_t SCGCI2C

Module clocks for I2C when the CPU is in sleep mode.

cc2538.h::cc2538_reg_t DCGCI2C

Module clocks for I2C when the CPU is in PM0.

cc2538.h::cc2538_reg_t SRI2C

Reset for I2C.

cc2538.h::cc2538_reg_t RCGCSEC

Module clocks for the security module when the CPU is in active (run) mode.

cc2538.h::cc2538_reg_t SCGCSEC

Module clocks for the security module when the CPU is in sleep mode.

cc2538.h::cc2538_reg_t DCGCSEC

Module clocks for the security module when the CPU is in PM0.

cc2538.h::cc2538_reg_t SRSEC

Reset for the security module.

cc2538.h::cc2538_reg_t PMCTL

Power mode.

cc2538.h::cc2538_reg_t SRCRC

CRC on state retention.

cc2538.h::cc2538_reg_t RESERVED10()

Reserved bits.

cc2538.h::cc2538_reg_t PWRDBG

Power debug register.

cc2538.h::cc2538_reg_t RESERVED11()

Reserved bits.

cc2538.h::cc2538_reg_t CLD

This register controls the clock loss detection feature.

cc2538.h::cc2538_reg_t RESERVED12()

Reserved bits.

cc2538.h::cc2538_reg_t IWE

This register controls interrupt wake-up.

cc2538.h::cc2538_reg_t I_MAP

This register selects which interrupt map to be used.

cc2538.h::cc2538_reg_t RESERVED13()

Reserved bits.

cc2538.h::cc2538_reg_t RCGCRFC

This register defines the module clocks for RF CORE when the CPU is in active (run) mode.

cc2538.h::cc2538_reg_t SCGCRFC

This register defines the module clocks for RF CORE when the CPU is in sleep mode.

cc2538.h::cc2538_reg_t DCGCRFC

This register defines the module clocks for RF CORE when the CPU is in PM0.

cc2538.h::cc2538_reg_t EMUOVR

This register defines the emulator override controls for power mode and peripheral clock gate.