132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
/*
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* STM32F4 Startup Code for STM32F407 devices
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* Copyright (C) 2017 Mario Hüttel <mario.huettel@gmx.net>
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*
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* This file is part of 'STM32F4 code template'.
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*
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* It is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* This code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this template. If not, see <http://www.gnu.org/licenses/>.
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* ------------------------------------------------------------------------
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*/
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/* C++ library init */
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# if defined(__cplusplus)
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extern "C" {
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extern void __libc_init_array(void);
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}
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#endif
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/* Defines for weak default handlers */
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#define WEAK __attribute__((weak))
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#define ALIAS(func) __attribute__ ((weak, alias (#func)))
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/* Define for section mapping */
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#define SECTION(sec) __attribute__((section(sec)))
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/* Handler prototypes */
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#if defined(_cplusplus)
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extern "C" {
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#endif
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/* Interrupt Defualt handler */
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WEAK void __int_default_handler(void);
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/* Core Interrupts */
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void Reset_Handler(void);
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void NMI_Handler(void) ALIAS(__int_default_handler);
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void HardFault_Handler(void) ALIAS(__int_default_handler);
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void SVCall_Handler(void) ALIAS(__int_default_handler);
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void PendSV_Handler(void) ALIAS(__int_default_handler);
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void SysTick_Handler(void) ALIAS(__int_default_handler);
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/* Peripheral Interrupts (by default mapped onto Default Handler) */
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extern int main(void);
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extern void __system_init(void);
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extern void __ld_top_of_stack(void);
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#if defined(_cplusplus)
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extern "C" }
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#endif
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void (* const vector_table[])(void) SECTION(".vectors") = {
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&__ld_top_of_stack,
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/* Core Interrupts */
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Reset_Handler,
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NMI_Handler,
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HardFault_Handler,
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};
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static void __init_section(unsigned int *src_start, unsigned int *dest_start, unsigned int *dest_end) {
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unsigned int *get, *put;
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put = dest_start;
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get = src_start;
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while ((unsigned int)put < (unsigned int)dest_end) {
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*(put++) = *(get++);
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}
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}
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static void __fill_zero(unsigned int *start, unsigned int *end) {
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while ((unsigned int) start < (unsigned int)end) {
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*(start++) = 0x00000000;
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}
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}
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extern unsigned int __ld_load_data;
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extern unsigned int __ld_sdata_ccm;
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extern unsigned int __ld_edata_ccm;
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extern unsigned int __ld_sbss_ccm;
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extern unsigned int __ld_ebss_ccm;
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extern unsigned int __ld_sdata;
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extern unsigned int __ld_edata;
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extern unsigned int __ld_sbss;
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extern unsigned int __ld_ebss;
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extern unsigned int __ld_sheap;
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extern unsigned int __ld_eheap;
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void Reset_Handler(void) {
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/* Stack is already initilized by hardware */
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/* Copy .data section */
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__init_section(&__ld_load_data, &__ld_sdata, &__ld_edata);
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/* Fill bss with zero */
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__fill_zero(&__ld_sbss, &__ld_ebss);
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/* Fill Heap with zero */
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__fill_zero(&__ld_sheap, &__ld_eheap);
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/* Fill static CCM memory with zeroes */
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__fill_zero(&__ld_sbss_ccm, &__ld_ebss_ccm);
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/* Set clocks, waitstates, ART operation etc. */
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SystemInit();
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/* C++ init function */
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#if defined(__cplusplus)
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__libc_init_array();
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#endif
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/* Call main */
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main();
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/* Catch return from main() */
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while(1);
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}
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WEAK void __int_default_handler(void)
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{
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while(1);
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}
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