EFM32 Happy Gecko Software Documentation
efm32hg-doc-5.1.2
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CMSIS Cortex-M0+ System Layer for EFM32HG devices.
Copyright 2017 Silicon Laboratories, Inc. http://www.silabs.com
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Definition in file system_efm32hg.c.
Go to the source code of this file.
Macros | |
#define | EFM32_HFRCO_MAX_FREQ (21000000UL) |
#define | EFM32_HFXO_FREQ (24000000UL) |
#define | EFM32_LFRCO_FREQ (32768UL) |
#define | EFM32_LFXO_FREQ (EFM32_LFRCO_FREQ) |
#define | EFM32_ULFRCO_FREQ (1000UL) |
Functions | |
uint32_t | SystemCoreClockGet (void) |
Get the current core clock frequency. More... | |
uint32_t | SystemHFClockGet (void) |
Get the current HFCLK frequency. More... | |
uint32_t | SystemHFXOClockGet (void) |
Get high frequency crystal oscillator clock frequency for target system. More... | |
void | SystemHFXOClockSet (uint32_t freq) |
Set high frequency crystal oscillator clock frequency for target system. More... | |
void | SystemInit (void) |
Initialize the system. More... | |
uint32_t | SystemLFRCOClockGet (void) |
Get low frequency RC oscillator clock frequency for target system. More... | |
uint32_t | SystemLFXOClockGet (void) |
Get low frequency crystal oscillator clock frequency for target system. More... | |
void | SystemLFXOClockSet (uint32_t freq) |
Set low frequency crystal oscillator clock frequency for target system. More... | |
uint32_t | SystemMaxCoreClockGet (void) |
Get the maximum core clock frequency. More... | |
uint32_t | SystemULFRCOClockGet (void) |
Get ultra low frequency RC oscillator clock frequency for target system. More... | |
Variables | |
uint32_t | SystemCoreClock |
System System Clock Frequency (Core Clock). More... | |
#define EFM32_LFRCO_FREQ (32768UL) |
LFRCO frequency, tuned to below frequency during manufacturing.
Definition at line 41 of file system_efm32hg.c.
Referenced by SystemHFClockGet(), and SystemLFRCOClockGet().
#define EFM32_LFXO_FREQ (EFM32_LFRCO_FREQ) |
(DO_NOT_INCLUDE_WITH_DOXYGEN)
Definition at line 71 of file system_efm32hg.c.
uint32_t SystemCoreClockGet | ( | void | ) |
Get the current core clock frequency.
Calculate and get the current core clock frequency based on the current configuration. Assuming that the SystemCoreClock global variable is maintained, the core clock frequency is stored in that variable as well. This function will however calculate the core clock based on actual HW configuration. It will also update the SystemCoreClock global variable.
Definition at line 116 of file system_efm32hg.c.
References _CMU_HFCORECLKDIV_HFCORECLKDIV_MASK, _CMU_HFCORECLKDIV_HFCORECLKDIV_SHIFT, CMU, SystemCoreClock, and SystemHFClockGet().
Referenced by CMU_ClockDivSet(), CMU_ClockFreqGet(), CMU_ClockSelectSet(), CMU_HFRCOBandSet(), MSC_Init(), SystemCoreClockUpdate(), SystemHFXOClockSet(), SystemLFXOClockSet(), TFT_AddressMappedInit(), and TFT_DirectInit().
uint32_t SystemHFClockGet | ( | void | ) |
Get the current HFCLK frequency.
Definition at line 158 of file system_efm32hg.c.
References _CMU_CTRL_HFCLKDIV_MASK, _CMU_CTRL_HFCLKDIV_SHIFT, _CMU_HFRCOCTRL_BAND_MASK, CMU, CMU_HFRCOCTRL_BAND_11MHZ, CMU_HFRCOCTRL_BAND_14MHZ, CMU_HFRCOCTRL_BAND_1MHZ, CMU_HFRCOCTRL_BAND_21MHZ, CMU_HFRCOCTRL_BAND_7MHZ, CMU_STATUS_HFRCOSEL, CMU_STATUS_HFXOSEL, CMU_STATUS_LFRCOSEL, CMU_STATUS_LFXOSEL, CMU_STATUS_USHFRCODIV2SEL, and EFM32_LFRCO_FREQ.
Referenced by CMU_ClockDivSet(), CMU_ClockFreqGet(), and SystemCoreClockGet().
uint32_t SystemHFXOClockGet | ( | void | ) |
Get high frequency crystal oscillator clock frequency for target system.
Definition at line 244 of file system_efm32hg.c.
Referenced by CMU_ClockSelectSet().
void SystemHFXOClockSet | ( | uint32_t | freq | ) |
Set high frequency crystal oscillator clock frequency for target system.
[in] | freq | HFXO frequency in Hz used for target. |
Definition at line 270 of file system_efm32hg.c.
References CMU, CMU_STATUS_HFXOSEL, and SystemCoreClockGet().
void SystemInit | ( | void | ) |
Initialize the system.
Do required generic HW system init.
Definition at line 300 of file system_efm32hg.c.
uint32_t SystemLFRCOClockGet | ( | void | ) |
Get low frequency RC oscillator clock frequency for target system.
Definition at line 315 of file system_efm32hg.c.
References EFM32_LFRCO_FREQ.
uint32_t SystemLFXOClockGet | ( | void | ) |
Get low frequency crystal oscillator clock frequency for target system.
Definition at line 351 of file system_efm32hg.c.
Referenced by UARTDRV_InitLeuart().
void SystemLFXOClockSet | ( | uint32_t | freq | ) |
Set low frequency crystal oscillator clock frequency for target system.
[in] | freq | LFXO frequency in Hz used for target. |
Definition at line 377 of file system_efm32hg.c.
References CMU, CMU_STATUS_LFXOSEL, and SystemCoreClockGet().
uint32_t SystemMaxCoreClockGet | ( | void | ) |
Get the maximum core clock frequency.
Definition at line 141 of file system_efm32hg.c.
uint32_t SystemULFRCOClockGet | ( | void | ) |
Get ultra low frequency RC oscillator clock frequency for target system.
Definition at line 334 of file system_efm32hg.c.
uint32_t SystemCoreClock |
System System Clock Frequency (Core Clock).
(DO_NOT_INCLUDE_WITH_DOXYGEN)
Required CMSIS global variable that must be kept up-to-date.
Definition at line 93 of file system_efm32hg.c.
Referenced by SystemCoreClockGet().