move things around and add efm8 and efm32 builds
This commit is contained in:
Conor Patrick
317
efm32/CMSIS/EFM32PG1B/startup_gcc_efm32pg1b.s
Normal file
317
efm32/CMSIS/EFM32PG1B/startup_gcc_efm32pg1b.s
Normal file
@@ -0,0 +1,317 @@
|
||||
/* @file startup_efm32pg1b.S
|
||||
* @brief startup file for Silicon Labs EFM32PG1B devices.
|
||||
* For use with GCC for ARM Embedded Processors
|
||||
* @version 5.2.2
|
||||
* Date: 12 June 2014
|
||||
*
|
||||
*/
|
||||
/* Copyright (c) 2011 - 2014 ARM LIMITED
|
||||
|
||||
All rights reserved.
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are met:
|
||||
- Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
- 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.
|
||||
- Neither the name of ARM 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 COPYRIGHT HOLDERS AND 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.
|
||||
---------------------------------------------------------------------------*/
|
||||
|
||||
.syntax unified
|
||||
.arch armv7-m
|
||||
.section .stack
|
||||
.align 3
|
||||
#ifdef __STACK_SIZE
|
||||
.equ Stack_Size, __STACK_SIZE
|
||||
#else
|
||||
.equ Stack_Size, 0x00000400
|
||||
#endif
|
||||
.globl __StackTop
|
||||
.globl __StackLimit
|
||||
__StackLimit:
|
||||
.space Stack_Size
|
||||
.size __StackLimit, . - __StackLimit
|
||||
__StackTop:
|
||||
.size __StackTop, . - __StackTop
|
||||
|
||||
.section .heap
|
||||
.align 3
|
||||
#ifdef __HEAP_SIZE
|
||||
.equ Heap_Size, __HEAP_SIZE
|
||||
#else
|
||||
.equ Heap_Size, 0x00000C00
|
||||
#endif
|
||||
.globl __HeapBase
|
||||
.globl __HeapLimit
|
||||
__HeapBase:
|
||||
.if Heap_Size
|
||||
.space Heap_Size
|
||||
.endif
|
||||
.size __HeapBase, . - __HeapBase
|
||||
__HeapLimit:
|
||||
.size __HeapLimit, . - __HeapLimit
|
||||
|
||||
.section .vectors
|
||||
.align 2
|
||||
.globl __Vectors
|
||||
__Vectors:
|
||||
.long __StackTop /* Top of Stack */
|
||||
.long Reset_Handler /* Reset Handler */
|
||||
.long NMI_Handler /* NMI Handler */
|
||||
.long HardFault_Handler /* Hard Fault Handler */
|
||||
.long MemManage_Handler /* MPU Fault Handler */
|
||||
.long BusFault_Handler /* Bus Fault Handler */
|
||||
.long UsageFault_Handler /* Usage Fault Handler */
|
||||
.long Default_Handler /* Reserved */
|
||||
.long Default_Handler /* Reserved */
|
||||
.long Default_Handler /* Reserved */
|
||||
.long Default_Handler /* Reserved */
|
||||
.long SVC_Handler /* SVCall Handler */
|
||||
.long DebugMon_Handler /* Debug Monitor Handler */
|
||||
.long Default_Handler /* Reserved */
|
||||
.long PendSV_Handler /* PendSV Handler */
|
||||
.long SysTick_Handler /* SysTick Handler */
|
||||
|
||||
/* External interrupts */
|
||||
.long EMU_IRQHandler /* 0 - EMU */
|
||||
.long Default_Handler /* 1 - Reserved */
|
||||
.long WDOG0_IRQHandler /* 2 - WDOG0 */
|
||||
.long Default_Handler /* 3 - Reserved */
|
||||
.long Default_Handler /* 4 - Reserved */
|
||||
.long Default_Handler /* 5 - Reserved */
|
||||
.long Default_Handler /* 6 - Reserved */
|
||||
.long Default_Handler /* 7 - Reserved */
|
||||
.long LDMA_IRQHandler /* 8 - LDMA */
|
||||
.long GPIO_EVEN_IRQHandler /* 9 - GPIO_EVEN */
|
||||
.long TIMER0_IRQHandler /* 10 - TIMER0 */
|
||||
.long USART0_RX_IRQHandler /* 11 - USART0_RX */
|
||||
.long USART0_TX_IRQHandler /* 12 - USART0_TX */
|
||||
.long ACMP0_IRQHandler /* 13 - ACMP0 */
|
||||
.long ADC0_IRQHandler /* 14 - ADC0 */
|
||||
.long IDAC0_IRQHandler /* 15 - IDAC0 */
|
||||
.long I2C0_IRQHandler /* 16 - I2C0 */
|
||||
.long GPIO_ODD_IRQHandler /* 17 - GPIO_ODD */
|
||||
.long TIMER1_IRQHandler /* 18 - TIMER1 */
|
||||
.long USART1_RX_IRQHandler /* 19 - USART1_RX */
|
||||
.long USART1_TX_IRQHandler /* 20 - USART1_TX */
|
||||
.long LEUART0_IRQHandler /* 21 - LEUART0 */
|
||||
.long PCNT0_IRQHandler /* 22 - PCNT0 */
|
||||
.long CMU_IRQHandler /* 23 - CMU */
|
||||
.long MSC_IRQHandler /* 24 - MSC */
|
||||
.long CRYPTO_IRQHandler /* 25 - CRYPTO */
|
||||
.long LETIMER0_IRQHandler /* 26 - LETIMER0 */
|
||||
.long Default_Handler /* 27 - Reserved */
|
||||
.long Default_Handler /* 28 - Reserved */
|
||||
.long RTCC_IRQHandler /* 29 - RTCC */
|
||||
.long Default_Handler /* 30 - Reserved */
|
||||
.long CRYOTIMER_IRQHandler /* 31 - CRYOTIMER */
|
||||
.long Default_Handler /* 32 - Reserved */
|
||||
.long FPUEH_IRQHandler /* 33 - FPUEH */
|
||||
|
||||
|
||||
.size __Vectors, . - __Vectors
|
||||
|
||||
.text
|
||||
.thumb
|
||||
.thumb_func
|
||||
.align 2
|
||||
.globl Reset_Handler
|
||||
.type Reset_Handler, %function
|
||||
Reset_Handler:
|
||||
#ifndef __NO_SYSTEM_INIT
|
||||
ldr r0, =SystemInit
|
||||
blx r0
|
||||
#endif
|
||||
|
||||
/* Firstly it copies data from read only memory to RAM. There are two schemes
|
||||
* to copy. One can copy more than one sections. Another can only copy
|
||||
* one section. The former scheme needs more instructions and read-only
|
||||
* data to implement than the latter.
|
||||
* Macro __STARTUP_COPY_MULTIPLE is used to choose between two schemes. */
|
||||
|
||||
#ifdef __STARTUP_COPY_MULTIPLE
|
||||
/* Multiple sections scheme.
|
||||
*
|
||||
* Between symbol address __copy_table_start__ and __copy_table_end__,
|
||||
* there are array of triplets, each of which specify:
|
||||
* offset 0: LMA of start of a section to copy from
|
||||
* offset 4: VMA of start of a section to copy to
|
||||
* offset 8: size of the section to copy. Must be multiply of 4
|
||||
*
|
||||
* All addresses must be aligned to 4 bytes boundary.
|
||||
*/
|
||||
ldr r4, =__copy_table_start__
|
||||
ldr r5, =__copy_table_end__
|
||||
|
||||
.L_loop0:
|
||||
cmp r4, r5
|
||||
bge .L_loop0_done
|
||||
ldr r1, [r4]
|
||||
ldr r2, [r4, #4]
|
||||
ldr r3, [r4, #8]
|
||||
|
||||
.L_loop0_0:
|
||||
subs r3, #4
|
||||
ittt ge
|
||||
ldrge r0, [r1, r3]
|
||||
strge r0, [r2, r3]
|
||||
bge .L_loop0_0
|
||||
|
||||
adds r4, #12
|
||||
b .L_loop0
|
||||
|
||||
.L_loop0_done:
|
||||
#else
|
||||
/* Single section scheme.
|
||||
*
|
||||
* The ranges of copy from/to are specified by following symbols
|
||||
* __etext: LMA of start of the section to copy from. Usually end of text
|
||||
* __data_start__: VMA of start of the section to copy to
|
||||
* __data_end__: VMA of end of the section to copy to
|
||||
*
|
||||
* All addresses must be aligned to 4 bytes boundary.
|
||||
*/
|
||||
ldr r1, =__etext
|
||||
ldr r2, =__data_start__
|
||||
ldr r3, =__data_end__
|
||||
|
||||
.L_loop1:
|
||||
cmp r2, r3
|
||||
ittt lt
|
||||
ldrlt r0, [r1], #4
|
||||
strlt r0, [r2], #4
|
||||
blt .L_loop1
|
||||
#endif /*__STARTUP_COPY_MULTIPLE */
|
||||
|
||||
/* This part of work usually is done in C library startup code. Otherwise,
|
||||
* define this macro to enable it in this startup.
|
||||
*
|
||||
* There are two schemes too. One can clear multiple BSS sections. Another
|
||||
* can only clear one section. The former is more size expensive than the
|
||||
* latter.
|
||||
*
|
||||
* Define macro __STARTUP_CLEAR_BSS_MULTIPLE to choose the former.
|
||||
* Otherwise efine macro __STARTUP_CLEAR_BSS to choose the later.
|
||||
*/
|
||||
#ifdef __STARTUP_CLEAR_BSS_MULTIPLE
|
||||
/* Multiple sections scheme.
|
||||
*
|
||||
* Between symbol address __zero_table_start__ and __zero_table_end__,
|
||||
* there are array of tuples specifying:
|
||||
* offset 0: Start of a BSS section
|
||||
* offset 4: Size of this BSS section. Must be multiply of 4
|
||||
*/
|
||||
ldr r3, =__zero_table_start__
|
||||
ldr r4, =__zero_table_end__
|
||||
|
||||
.L_loop2:
|
||||
cmp r3, r4
|
||||
bge .L_loop2_done
|
||||
ldr r1, [r3]
|
||||
ldr r2, [r3, #4]
|
||||
movs r0, 0
|
||||
|
||||
.L_loop2_0:
|
||||
subs r2, #4
|
||||
itt ge
|
||||
strge r0, [r1, r2]
|
||||
bge .L_loop2_0
|
||||
adds r3, #8
|
||||
b .L_loop2
|
||||
.L_loop2_done:
|
||||
#elif defined (__STARTUP_CLEAR_BSS)
|
||||
/* Single BSS section scheme.
|
||||
*
|
||||
* The BSS section is specified by following symbols
|
||||
* __bss_start__: start of the BSS section.
|
||||
* __bss_end__: end of the BSS section.
|
||||
*
|
||||
* Both addresses must be aligned to 4 bytes boundary.
|
||||
*/
|
||||
ldr r1, =__bss_start__
|
||||
ldr r2, =__bss_end__
|
||||
|
||||
movs r0, 0
|
||||
.L_loop3:
|
||||
cmp r1, r2
|
||||
itt lt
|
||||
strlt r0, [r1], #4
|
||||
blt .L_loop3
|
||||
#endif /* __STARTUP_CLEAR_BSS_MULTIPLE || __STARTUP_CLEAR_BSS */
|
||||
|
||||
#ifndef __START
|
||||
#define __START _start
|
||||
#endif
|
||||
bl __START
|
||||
|
||||
.pool
|
||||
.size Reset_Handler, . - Reset_Handler
|
||||
|
||||
.align 1
|
||||
.thumb_func
|
||||
.weak Default_Handler
|
||||
.type Default_Handler, %function
|
||||
Default_Handler:
|
||||
b .
|
||||
.size Default_Handler, . - Default_Handler
|
||||
|
||||
/* Macro to define default handlers. Default handler
|
||||
* will be weak symbol and just dead loops. They can be
|
||||
* overwritten by other handlers */
|
||||
.macro def_irq_handler handler_name
|
||||
.weak \handler_name
|
||||
.set \handler_name, Default_Handler
|
||||
.endm
|
||||
|
||||
def_irq_handler NMI_Handler
|
||||
def_irq_handler HardFault_Handler
|
||||
def_irq_handler MemManage_Handler
|
||||
def_irq_handler BusFault_Handler
|
||||
def_irq_handler UsageFault_Handler
|
||||
def_irq_handler SVC_Handler
|
||||
def_irq_handler DebugMon_Handler
|
||||
def_irq_handler PendSV_Handler
|
||||
def_irq_handler SysTick_Handler
|
||||
|
||||
|
||||
def_irq_handler EMU_IRQHandler
|
||||
def_irq_handler WDOG0_IRQHandler
|
||||
def_irq_handler LDMA_IRQHandler
|
||||
def_irq_handler GPIO_EVEN_IRQHandler
|
||||
def_irq_handler TIMER0_IRQHandler
|
||||
def_irq_handler USART0_RX_IRQHandler
|
||||
def_irq_handler USART0_TX_IRQHandler
|
||||
def_irq_handler ACMP0_IRQHandler
|
||||
def_irq_handler ADC0_IRQHandler
|
||||
def_irq_handler IDAC0_IRQHandler
|
||||
def_irq_handler I2C0_IRQHandler
|
||||
def_irq_handler GPIO_ODD_IRQHandler
|
||||
def_irq_handler TIMER1_IRQHandler
|
||||
def_irq_handler USART1_RX_IRQHandler
|
||||
def_irq_handler USART1_TX_IRQHandler
|
||||
def_irq_handler LEUART0_IRQHandler
|
||||
def_irq_handler PCNT0_IRQHandler
|
||||
def_irq_handler CMU_IRQHandler
|
||||
def_irq_handler MSC_IRQHandler
|
||||
def_irq_handler CRYPTO_IRQHandler
|
||||
def_irq_handler LETIMER0_IRQHandler
|
||||
def_irq_handler RTCC_IRQHandler
|
||||
def_irq_handler CRYOTIMER_IRQHandler
|
||||
def_irq_handler FPUEH_IRQHandler
|
||||
|
||||
.end
|
||||
389
efm32/CMSIS/EFM32PG1B/system_efm32pg1b.c
Normal file
389
efm32/CMSIS/EFM32PG1B/system_efm32pg1b.c
Normal file
@@ -0,0 +1,389 @@
|
||||
/***************************************************************************//**
|
||||
* @file system_efm32pg1b.c
|
||||
* @brief CMSIS Cortex-M3/M4 System Layer for EFM32 devices.
|
||||
* @version 5.2.2
|
||||
******************************************************************************
|
||||
* # License
|
||||
* <b>Copyright 2017 Silicon Laboratories, Inc. http://www.silabs.com</b>
|
||||
******************************************************************************
|
||||
*
|
||||
* Permission is granted to anyone to use this software for any purpose,
|
||||
* including commercial applications, and to alter it and redistribute it
|
||||
* freely, subject to the following restrictions:
|
||||
*
|
||||
* 1. The origin of this software must not be misrepresented; you must not
|
||||
* claim that you wrote the original software.@n
|
||||
* 2. Altered source versions must be plainly marked as such, and must not be
|
||||
* misrepresented as being the original software.@n
|
||||
* 3. This notice may not be removed or altered from any source distribution.
|
||||
*
|
||||
* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Laboratories, Inc.
|
||||
* has no obligation to support this Software. Silicon Laboratories, Inc. is
|
||||
* providing the Software "AS IS", with no express or implied warranties of any
|
||||
* kind, including, but not limited to, any implied warranties of
|
||||
* merchantability or fitness for any particular purpose or warranties against
|
||||
* infringement of any proprietary rights of a third party.
|
||||
*
|
||||
* Silicon Laboratories, Inc. will not be liable for any consequential,
|
||||
* incidental, or special damages, or any other relief, or for any claim by
|
||||
* any third party, arising from your use of this Software.
|
||||
*
|
||||
*****************************************************************************/
|
||||
|
||||
#include <stdint.h>
|
||||
#include "em_device.h"
|
||||
|
||||
/*******************************************************************************
|
||||
****************************** DEFINES ************************************
|
||||
******************************************************************************/
|
||||
|
||||
/** LFRCO frequency, tuned to below frequency during manufacturing. */
|
||||
#define EFM32_LFRCO_FREQ (32768UL)
|
||||
/** ULFRCO frequency */
|
||||
#define EFM32_ULFRCO_FREQ (1000UL)
|
||||
|
||||
/*******************************************************************************
|
||||
************************** LOCAL VARIABLES ********************************
|
||||
******************************************************************************/
|
||||
|
||||
/* System oscillator frequencies. These frequencies are normally constant */
|
||||
/* for a target, but they are made configurable in order to allow run-time */
|
||||
/* handling of different boards. The crystal oscillator clocks can be set */
|
||||
/* compile time to a non-default value by defining respective EFM_nFXO_FREQ */
|
||||
/* values according to board design. By defining the EFM_nFXO_FREQ to 0, */
|
||||
/* one indicates that the oscillator is not present, in order to save some */
|
||||
/* SW footprint. */
|
||||
|
||||
#ifndef EFM32_HFRCO_MAX_FREQ
|
||||
/** Maximum HFRCO frequency */
|
||||
#define EFM32_HFRCO_MAX_FREQ (38000000UL)
|
||||
#endif
|
||||
|
||||
#ifndef EFM32_HFXO_FREQ
|
||||
/** HFXO frequency */
|
||||
#define EFM32_HFXO_FREQ (40000000UL)
|
||||
#endif
|
||||
|
||||
#ifndef EFM32_HFRCO_STARTUP_FREQ
|
||||
/** HFRCO startup frequency */
|
||||
#define EFM32_HFRCO_STARTUP_FREQ (19000000UL)
|
||||
#endif
|
||||
|
||||
|
||||
/* Do not define variable if HF crystal oscillator not present */
|
||||
#if (EFM32_HFXO_FREQ > 0UL)
|
||||
/** @cond DO_NOT_INCLUDE_WITH_DOXYGEN */
|
||||
/** System HFXO clock. */
|
||||
static uint32_t SystemHFXOClock = EFM32_HFXO_FREQ;
|
||||
/** @endcond (DO_NOT_INCLUDE_WITH_DOXYGEN) */
|
||||
#endif
|
||||
|
||||
#ifndef EFM32_LFXO_FREQ
|
||||
/** LFXO frequency */
|
||||
#define EFM32_LFXO_FREQ (EFM32_LFRCO_FREQ)
|
||||
#endif
|
||||
/* Do not define variable if LF crystal oscillator not present */
|
||||
#if (EFM32_LFXO_FREQ > 0UL)
|
||||
/** @cond DO_NOT_INCLUDE_WITH_DOXYGEN */
|
||||
/** System LFXO clock. */
|
||||
static uint32_t SystemLFXOClock = 32768UL;
|
||||
/** @endcond (DO_NOT_INCLUDE_WITH_DOXYGEN) */
|
||||
#endif
|
||||
|
||||
|
||||
/*******************************************************************************
|
||||
************************** GLOBAL VARIABLES *******************************
|
||||
******************************************************************************/
|
||||
|
||||
/**
|
||||
* @brief
|
||||
* System System Clock Frequency (Core Clock).
|
||||
*
|
||||
* @details
|
||||
* Required CMSIS global variable that must be kept up-to-date.
|
||||
*/
|
||||
uint32_t SystemCoreClock = EFM32_HFRCO_STARTUP_FREQ;
|
||||
|
||||
|
||||
/**
|
||||
* @brief
|
||||
* System HFRCO frequency
|
||||
*
|
||||
* @note
|
||||
* This is an EFM32 proprietary variable, not part of the CMSIS definition.
|
||||
*
|
||||
* @details
|
||||
* Frequency of the system HFRCO oscillator
|
||||
*/
|
||||
uint32_t SystemHfrcoFreq = EFM32_HFRCO_STARTUP_FREQ;
|
||||
|
||||
|
||||
/*******************************************************************************
|
||||
************************** GLOBAL FUNCTIONS *******************************
|
||||
******************************************************************************/
|
||||
|
||||
/***************************************************************************//**
|
||||
* @brief
|
||||
* Get the current core clock frequency.
|
||||
*
|
||||
* @details
|
||||
* 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.
|
||||
*
|
||||
* @note
|
||||
* This is an EFM32 proprietary function, not part of the CMSIS definition.
|
||||
*
|
||||
* @return
|
||||
* The current core clock frequency in Hz.
|
||||
******************************************************************************/
|
||||
uint32_t SystemCoreClockGet(void)
|
||||
{
|
||||
uint32_t ret;
|
||||
uint32_t presc;
|
||||
|
||||
ret = SystemHFClockGet();
|
||||
presc = (CMU->HFCOREPRESC & _CMU_HFCOREPRESC_PRESC_MASK) >>
|
||||
_CMU_HFCOREPRESC_PRESC_SHIFT;
|
||||
ret /= (presc + 1);
|
||||
|
||||
/* Keep CMSIS system clock variable up-to-date */
|
||||
SystemCoreClock = ret;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************//**
|
||||
* @brief
|
||||
* Get the maximum core clock frequency.
|
||||
*
|
||||
* @note
|
||||
* This is an EFM32 proprietary function, not part of the CMSIS definition.
|
||||
*
|
||||
* @return
|
||||
* The maximum core clock frequency in Hz.
|
||||
******************************************************************************/
|
||||
uint32_t SystemMaxCoreClockGet(void)
|
||||
{
|
||||
return (EFM32_HFRCO_MAX_FREQ > EFM32_HFXO_FREQ ? \
|
||||
EFM32_HFRCO_MAX_FREQ : EFM32_HFXO_FREQ);
|
||||
}
|
||||
|
||||
|
||||
/***************************************************************************//**
|
||||
* @brief
|
||||
* Get the current HFCLK frequency.
|
||||
*
|
||||
* @note
|
||||
* This is an EFM32 proprietary function, not part of the CMSIS definition.
|
||||
*
|
||||
* @return
|
||||
* The current HFCLK frequency in Hz.
|
||||
******************************************************************************/
|
||||
uint32_t SystemHFClockGet(void)
|
||||
{
|
||||
uint32_t ret;
|
||||
|
||||
switch (CMU->HFCLKSTATUS & _CMU_HFCLKSTATUS_SELECTED_MASK)
|
||||
{
|
||||
case CMU_HFCLKSTATUS_SELECTED_LFXO:
|
||||
#if (EFM32_LFXO_FREQ > 0)
|
||||
ret = SystemLFXOClock;
|
||||
#else
|
||||
/* We should not get here, since core should not be clocked. May */
|
||||
/* be caused by a misconfiguration though. */
|
||||
ret = 0;
|
||||
#endif
|
||||
break;
|
||||
|
||||
case CMU_HFCLKSTATUS_SELECTED_LFRCO:
|
||||
ret = EFM32_LFRCO_FREQ;
|
||||
break;
|
||||
|
||||
case CMU_HFCLKSTATUS_SELECTED_HFXO:
|
||||
#if (EFM32_HFXO_FREQ > 0)
|
||||
ret = SystemHFXOClock;
|
||||
#else
|
||||
/* We should not get here, since core should not be clocked. May */
|
||||
/* be caused by a misconfiguration though. */
|
||||
ret = 0;
|
||||
#endif
|
||||
break;
|
||||
|
||||
default: /* CMU_HFCLKSTATUS_SELECTED_HFRCO */
|
||||
ret = SystemHfrcoFreq;
|
||||
break;
|
||||
}
|
||||
|
||||
return ret / (1U + ((CMU->HFPRESC & _CMU_HFPRESC_PRESC_MASK)
|
||||
>> _CMU_HFPRESC_PRESC_SHIFT));
|
||||
}
|
||||
|
||||
|
||||
/**************************************************************************//**
|
||||
* @brief
|
||||
* Get high frequency crystal oscillator clock frequency for target system.
|
||||
*
|
||||
* @note
|
||||
* This is an EFM32 proprietary function, not part of the CMSIS definition.
|
||||
*
|
||||
* @return
|
||||
* HFXO frequency in Hz.
|
||||
*****************************************************************************/
|
||||
uint32_t SystemHFXOClockGet(void)
|
||||
{
|
||||
/* External crystal oscillator present? */
|
||||
#if (EFM32_HFXO_FREQ > 0)
|
||||
return SystemHFXOClock;
|
||||
#else
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/**************************************************************************//**
|
||||
* @brief
|
||||
* Set high frequency crystal oscillator clock frequency for target system.
|
||||
*
|
||||
* @note
|
||||
* This function is mainly provided for being able to handle target systems
|
||||
* with different HF crystal oscillator frequencies run-time. If used, it
|
||||
* should probably only be used once during system startup.
|
||||
*
|
||||
* @note
|
||||
* This is an EFM32 proprietary function, not part of the CMSIS definition.
|
||||
*
|
||||
* @param[in] freq
|
||||
* HFXO frequency in Hz used for target.
|
||||
*****************************************************************************/
|
||||
void SystemHFXOClockSet(uint32_t freq)
|
||||
{
|
||||
/* External crystal oscillator present? */
|
||||
#if (EFM32_HFXO_FREQ > 0)
|
||||
SystemHFXOClock = freq;
|
||||
|
||||
/* Update core clock frequency if HFXO is used to clock core */
|
||||
if ((CMU->HFCLKSTATUS & _CMU_HFCLKSTATUS_SELECTED_MASK) == CMU_HFCLKSTATUS_SELECTED_HFXO)
|
||||
{
|
||||
/* The function will update the global variable */
|
||||
SystemCoreClockGet();
|
||||
}
|
||||
#else
|
||||
(void)freq; /* Unused parameter */
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/**************************************************************************//**
|
||||
* @brief
|
||||
* Initialize the system.
|
||||
*
|
||||
* @details
|
||||
* Do required generic HW system init.
|
||||
*
|
||||
* @note
|
||||
* This function is invoked during system init, before the main() routine
|
||||
* and any data has been initialized. For this reason, it cannot do any
|
||||
* initialization of variables etc.
|
||||
*****************************************************************************/
|
||||
void SystemInit(void)
|
||||
{
|
||||
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
|
||||
/* Set floating point coprosessor access mode. */
|
||||
SCB->CPACR |= ((3UL << 10*2) | /* set CP10 Full Access */
|
||||
(3UL << 11*2) ); /* set CP11 Full Access */
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/**************************************************************************//**
|
||||
* @brief
|
||||
* Get low frequency RC oscillator clock frequency for target system.
|
||||
*
|
||||
* @note
|
||||
* This is an EFM32 proprietary function, not part of the CMSIS definition.
|
||||
*
|
||||
* @return
|
||||
* LFRCO frequency in Hz.
|
||||
*****************************************************************************/
|
||||
uint32_t SystemLFRCOClockGet(void)
|
||||
{
|
||||
/* Currently we assume that this frequency is properly tuned during */
|
||||
/* manufacturing and is not changed after reset. If future requirements */
|
||||
/* for re-tuning by user, we can add support for that. */
|
||||
return EFM32_LFRCO_FREQ;
|
||||
}
|
||||
|
||||
|
||||
/**************************************************************************//**
|
||||
* @brief
|
||||
* Get ultra low frequency RC oscillator clock frequency for target system.
|
||||
*
|
||||
* @note
|
||||
* This is an EFM32 proprietary function, not part of the CMSIS definition.
|
||||
*
|
||||
* @return
|
||||
* ULFRCO frequency in Hz.
|
||||
*****************************************************************************/
|
||||
uint32_t SystemULFRCOClockGet(void)
|
||||
{
|
||||
/* The ULFRCO frequency is not tuned, and can be very inaccurate */
|
||||
return EFM32_ULFRCO_FREQ;
|
||||
}
|
||||
|
||||
|
||||
/**************************************************************************//**
|
||||
* @brief
|
||||
* Get low frequency crystal oscillator clock frequency for target system.
|
||||
*
|
||||
* @note
|
||||
* This is an EFM32 proprietary function, not part of the CMSIS definition.
|
||||
*
|
||||
* @return
|
||||
* LFXO frequency in Hz.
|
||||
*****************************************************************************/
|
||||
uint32_t SystemLFXOClockGet(void)
|
||||
{
|
||||
/* External crystal oscillator present? */
|
||||
#if (EFM32_LFXO_FREQ > 0)
|
||||
return SystemLFXOClock;
|
||||
#else
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/**************************************************************************//**
|
||||
* @brief
|
||||
* Set low frequency crystal oscillator clock frequency for target system.
|
||||
*
|
||||
* @note
|
||||
* This function is mainly provided for being able to handle target systems
|
||||
* with different HF crystal oscillator frequencies run-time. If used, it
|
||||
* should probably only be used once during system startup.
|
||||
*
|
||||
* @note
|
||||
* This is an EFM32 proprietary function, not part of the CMSIS definition.
|
||||
*
|
||||
* @param[in] freq
|
||||
* LFXO frequency in Hz used for target.
|
||||
*****************************************************************************/
|
||||
void SystemLFXOClockSet(uint32_t freq)
|
||||
{
|
||||
/* External crystal oscillator present? */
|
||||
#if (EFM32_LFXO_FREQ > 0)
|
||||
SystemLFXOClock = freq;
|
||||
|
||||
/* Update core clock frequency if LFXO is used to clock core */
|
||||
if ((CMU->HFCLKSTATUS & _CMU_HFCLKSTATUS_SELECTED_MASK) == CMU_HFCLKSTATUS_SELECTED_LFXO)
|
||||
{
|
||||
/* The function will update the global variable */
|
||||
SystemCoreClockGet();
|
||||
}
|
||||
#else
|
||||
(void)freq; /* Unused parameter */
|
||||
#endif
|
||||
}
|
||||
Reference in New Issue
Block a user