/** ****************************************************************************** * @file startup_stm32l431xx.s * @author MCD Application Team * @brief STM32L431xx devices vector table for GCC toolchain. * This module performs: * - Set the initial SP * - Set the initial PC == Reset_Handler, * - Set the vector table entries with the exceptions ISR address, * - Configure the clock system * - Branches to main in the C library (which eventually * calls main()). * After Reset the Cortex-M4 processor is in Thread mode, * priority is Privileged, and the Stack is set to Main. ****************************************************************************** * @attention * * Copyright (c) 2017 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ .syntax unified .cpu cortex-m4 .fpu softvfp .thumb .global g_pfnVectors .global Default_Handler /* start address for the initialization values of the .data section. defined in linker script */ .word _sidata /* start address for the .data section. defined in linker script */ .word _sdata /* end address for the .data section. defined in linker script */ .word _edata /* start address for the .bss section. defined in linker script */ .word _sbss /* end address for the .bss section. defined in linker script */ .word _ebss .equ BootRAM, 0xF1E0F85F /** * @brief This is the code that gets called when the processor first * starts execution following a reset event. Only the absolutely * necessary set is performed, after which the application * supplied main() routine is called. * @param None * @retval : None */ .section .text.Reset_Handler .weak Reset_Handler .type Reset_Handler, %function Reset_Handler: ldr sp, =_estack /* Set stack pointer */ /* Call the clock system initialization function.*/ bl SystemInit /* Copy the data segment initializers from flash to SRAM */ ldr r0, =_sdata ldr r1, =_edata ldr r2, =_sidata movs r3, #0 b LoopCopyDataInit CopyDataInit: ldr r4, [r2, r3] str r4, [r0, r3] adds r3, r3, #4 LoopCopyDataInit: adds r4, r0, r3 cmp r4, r1 bcc CopyDataInit /* Zero fill the bss segment. */ ldr r2, =_sbss ldr r4, =_ebss movs r3, #0 b LoopFillZerobss FillZerobss: str r3, [r2] adds r2, r2, #4 LoopFillZerobss: cmp r2, r4 bcc FillZerobss /* Call static constructors */ bl __libc_init_array /* Call the application's entry point.*/ bl main LoopForever: b LoopForever .size Reset_Handler, .-Reset_Handler /** * @brief This is the code that gets called when the processor receives an * unexpected interrupt. This simply enters an infinite loop, preserving * the system state for examination by a debugger. * * @param None * @retval : None */ .section .text.Default_Handler,"ax",%progbits Default_Handler: Infinite_Loop: b Infinite_Loop .size Default_Handler, .-Default_Handler /****************************************************************************** * * The minimal vector table for a Cortex-M4. Note that the proper constructs * must be placed on this to ensure that it ends up at physical address * 0x0000.0000. * ******************************************************************************/ .section .isr_vector,"a",%progbits .type g_pfnVectors, %object .size g_pfnVectors, .-g_pfnVectors g_pfnVectors: .word _estack .word Reset_Handler .word NMI_Handler .word HardFault_Handler .word MemManage_Handler .word BusFault_Handler .word UsageFault_Handler .word 0 .word 0 .word 0 .word 0 .word SVC_Handler .word DebugMon_Handler .word 0 .word PendSV_Handler .word SysTick_Handler .word WWDG_IRQHandler .word PVD_PVM_IRQHandler .word TAMP_STAMP_IRQHandler .word RTC_WKUP_IRQHandler .word FLASH_IRQHandler .word RCC_IRQHandler .word EXTI0_IRQHandler .word EXTI1_IRQHandler .word EXTI2_IRQHandler .word EXTI3_IRQHandler .word EXTI4_IRQHandler .word DMA1_Channel1_IRQHandler .word DMA1_Channel2_IRQHandler .word DMA1_Channel3_IRQHandler .word DMA1_Channel4_IRQHandler .word DMA1_Channel5_IRQHandler .word DMA1_Channel6_IRQHandler .word DMA1_Channel7_IRQHandler .word ADC1_IRQHandler .word CAN1_TX_IRQHandler .word CAN1_RX0_IRQHandler .word CAN1_RX1_IRQHandler .word CAN1_SCE_IRQHandler .word EXTI9_5_IRQHandler .word TIM1_BRK_TIM15_IRQHandler .word TIM1_UP_TIM16_IRQHandler .word TIM1_TRG_COM_IRQHandler .word TIM1_CC_IRQHandler .word TIM2_IRQHandler .word 0 .word 0 .word I2C1_EV_IRQHandler .word I2C1_ER_IRQHandler .word I2C2_EV_IRQHandler .word I2C2_ER_IRQHandler .word SPI1_IRQHandler .word SPI2_IRQHandler .word USART1_IRQHandler .word USART2_IRQHandler .word USART3_IRQHandler .word EXTI15_10_IRQHandler .word RTC_Alarm_IRQHandler .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word SDMMC1_IRQHandler .word 0 .word SPI3_IRQHandler .word 0 .word 0 .word TIM6_DAC_IRQHandler .word TIM7_IRQHandler .word DMA2_Channel1_IRQHandler .word DMA2_Channel2_IRQHandler .word DMA2_Channel3_IRQHandler .word DMA2_Channel4_IRQHandler .word DMA2_Channel5_IRQHandler .word 0 .word 0 .word 0 .word COMP_IRQHandler .word LPTIM1_IRQHandler .word LPTIM2_IRQHandler .word 0 .word DMA2_Channel6_IRQHandler .word DMA2_Channel7_IRQHandler .word LPUART1_IRQHandler .word QUADSPI_IRQHandler .word I2C3_EV_IRQHandler .word I2C3_ER_IRQHandler .word SAI1_IRQHandler .word 0 .word SWPMI1_IRQHandler .word TSC_IRQHandler .word 0 .word 0 .word RNG_IRQHandler .word FPU_IRQHandler .word CRS_IRQHandler /******************************************************************************* * * Provide weak aliases for each Exception handler to the Default_Handler. * As they are weak aliases, any function with the same name will override * this definition. * *******************************************************************************/ .weak NMI_Handler .thumb_set NMI_Handler,Default_Handler .weak HardFault_Handler .thumb_set HardFault_Handler,Default_Handler .weak MemManage_Handler .thumb_set MemManage_Handler,Default_Handler .weak BusFault_Handler .thumb_set BusFault_Handler,Default_Handler .weak UsageFault_Handler .thumb_set UsageFault_Handler,Default_Handler .weak SVC_Handler .thumb_set SVC_Handler,Default_Handler .weak DebugMon_Handler .thumb_set DebugMon_Handler,Default_Handler .weak PendSV_Handler .thumb_set PendSV_Handler,Default_Handler .weak SysTick_Handler .thumb_set SysTick_Handler,Default_Handler .weak WWDG_IRQHandler .thumb_set WWDG_IRQHandler,Default_Handler .weak PVD_PVM_IRQHandler .thumb_set PVD_PVM_IRQHandler,Default_Handler .weak TAMP_STAMP_IRQHandler .thumb_set TAMP_STAMP_IRQHandler,Default_Handler .weak RTC_WKUP_IRQHandler .thumb_set RTC_WKUP_IRQHandler,Default_Handler .weak FLASH_IRQHandler .thumb_set FLASH_IRQHandler,Default_Handler .weak RCC_IRQHandler .thumb_set RCC_IRQHandler,Default_Handler .weak EXTI0_IRQHandler .thumb_set EXTI0_IRQHandler,Default_Handler .weak EXTI1_IRQHandler .thumb_set EXTI1_IRQHandler,Default_Handler .weak EXTI2_IRQHandler .thumb_set EXTI2_IRQHandler,Default_Handler .weak EXTI3_IRQHandler .thumb_set EXTI3_IRQHandler,Default_Handler .weak EXTI4_IRQHandler .thumb_set EXTI4_IRQHandler,Default_Handler .weak DMA1_Channel1_IRQHandler .thumb_set DMA1_Channel1_IRQHandler,Default_Handler .weak DMA1_Channel2_IRQHandler .thumb_set DMA1_Channel2_IRQHandler,Default_Handler .weak DMA1_Channel3_IRQHandler .thumb_set DMA1_Channel3_IRQHandler,Default_Handler .weak DMA1_Channel4_IRQHandler .thumb_set DMA1_Channel4_IRQHandler,Default_Handler .weak DMA1_Channel5_IRQHandler .thumb_set DMA1_Channel5_IRQHandler,Default_Handler .weak DMA1_Channel6_IRQHandler .thumb_set DMA1_Channel6_IRQHandler,Default_Handler .weak DMA1_Channel7_IRQHandler .thumb_set DMA1_Channel7_IRQHandler,Default_Handler .weak ADC1_IRQHandler .thumb_set ADC1_IRQHandler,Default_Handler .weak CAN1_TX_IRQHandler .thumb_set CAN1_TX_IRQHandler,Default_Handler .weak CAN1_RX0_IRQHandler .thumb_set CAN1_RX0_IRQHandler,Default_Handler .weak CAN1_RX1_IRQHandler .thumb_set CAN1_RX1_IRQHandler,Default_Handler .weak CAN1_SCE_IRQHandler .thumb_set CAN1_SCE_IRQHandler,Default_Handler .weak EXTI9_5_IRQHandler .thumb_set EXTI9_5_IRQHandler,Default_Handler .weak TIM1_BRK_TIM15_IRQHandler .thumb_set TIM1_BRK_TIM15_IRQHandler,Default_Handler .weak TIM1_UP_TIM16_IRQHandler .thumb_set TIM1_UP_TIM16_IRQHandler,Default_Handler .weak TIM1_TRG_COM_IRQHandler .thumb_set TIM1_TRG_COM_IRQHandler,Default_Handler .weak TIM1_CC_IRQHandler .thumb_set TIM1_CC_IRQHandler,Default_Handler .weak TIM2_IRQHandler .thumb_set TIM2_IRQHandler,Default_Handler .weak I2C1_EV_IRQHandler .thumb_set I2C1_EV_IRQHandler,Default_Handler .weak I2C1_ER_IRQHandler .thumb_set I2C1_ER_IRQHandler,Default_Handler .weak I2C2_EV_IRQHandler .thumb_set I2C2_EV_IRQHandler,Default_Handler .weak I2C2_ER_IRQHandler .thumb_set I2C2_ER_IRQHandler,Default_Handler .weak SPI1_IRQHandler .thumb_set SPI1_IRQHandler,Default_Handler .weak SPI2_IRQHandler .thumb_set SPI2_IRQHandler,Default_Handler .weak USART1_IRQHandler .thumb_set USART1_IRQHandler,Default_Handler .weak USART2_IRQHandler .thumb_set USART2_IRQHandler,Default_Handler .weak USART3_IRQHandler .thumb_set USART3_IRQHandler,Default_Handler .weak EXTI15_10_IRQHandler .thumb_set EXTI15_10_IRQHandler,Default_Handler .weak RTC_Alarm_IRQHandler .thumb_set RTC_Alarm_IRQHandler,Default_Handler .weak SDMMC1_IRQHandler .thumb_set SDMMC1_IRQHandler,Default_Handler .weak SPI3_IRQHandler .thumb_set SPI3_IRQHandler,Default_Handler .weak TIM6_DAC_IRQHandler .thumb_set TIM6_DAC_IRQHandler,Default_Handler .weak TIM7_IRQHandler .thumb_set TIM7_IRQHandler,Default_Handler .weak DMA2_Channel1_IRQHandler .thumb_set DMA2_Channel1_IRQHandler,Default_Handler .weak DMA2_Channel2_IRQHandler .thumb_set DMA2_Channel2_IRQHandler,Default_Handler .weak DMA2_Channel3_IRQHandler .thumb_set DMA2_Channel3_IRQHandler,Default_Handler .weak DMA2_Channel4_IRQHandler .thumb_set DMA2_Channel4_IRQHandler,Default_Handler .weak DMA2_Channel5_IRQHandler .thumb_set DMA2_Channel5_IRQHandler,Default_Handler .weak COMP_IRQHandler .thumb_set COMP_IRQHandler,Default_Handler .weak LPTIM1_IRQHandler .thumb_set LPTIM1_IRQHandler,Default_Handler .weak LPTIM2_IRQHandler .thumb_set LPTIM2_IRQHandler,Default_Handler .weak DMA2_Channel6_IRQHandler .thumb_set DMA2_Channel6_IRQHandler,Default_Handler .weak DMA2_Channel7_IRQHandler .thumb_set DMA2_Channel7_IRQHandler,Default_Handler .weak LPUART1_IRQHandler .thumb_set LPUART1_IRQHandler,Default_Handler .weak QUADSPI_IRQHandler .thumb_set QUADSPI_IRQHandler,Default_Handler .weak I2C3_EV_IRQHandler .thumb_set I2C3_EV_IRQHandler,Default_Handler .weak I2C3_ER_IRQHandler .thumb_set I2C3_ER_IRQHandler,Default_Handler .weak SAI1_IRQHandler .thumb_set SAI1_IRQHandler,Default_Handler .weak SWPMI1_IRQHandler .thumb_set SWPMI1_IRQHandler,Default_Handler .weak TSC_IRQHandler .thumb_set TSC_IRQHandler,Default_Handler .weak RNG_IRQHandler .thumb_set RNG_IRQHandler,Default_Handler .weak FPU_IRQHandler .thumb_set FPU_IRQHandler,Default_Handler .weak CRS_IRQHandler .thumb_set CRS_IRQHandler,Default_Handler