/** ****************************************************************************** * @file startup_stm32f0xx.s * @author MCD Application Team * @version V1.4.0 * @date 24-July-2014 * @brief STM32F072 Devices vector table for RIDE7 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 system clock * - Branches to main in the C library (which eventually * calls main()). * After Reset the Cortex-M0 processor is in Thread mode, * priority is Privileged, and the Stack is set to Main. ****************************************************************************** * @attention * *

© COPYRIGHT 2014 STMicroelectronics

* * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); * You may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.st.com/software_license_agreement_liberty_v2 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ****************************************************************************** */ .syntax unified .cpu cortex-m0 .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, 0xF108F85F /** * @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 r0, =_estack mov sp, r0 /* set stack pointer */ /*Check if boot space corresponds to test memory*/ LDR R0,=0x00000004 LDR R1, [R0] LSRS R1, R1, #24 LDR R2,=0x1F CMP R1, R2 BNE ApplicationStart /*SYSCFG clock enable*/ LDR R0,=0x40021018 LDR R1,=0x00000001 STR R1, [R0] /*Set CFGR1 register with flash memory remap at address 0*/ LDR R0,=0x40010000 LDR R1,=0x00000000 STR R1, [R0] ApplicationStart: /* Copy the data segment initializers from flash to SRAM */ movs r1, #0 b LoopCopyDataInit CopyDataInit: ldr r3, =_sidata ldr r3, [r3, r1] str r3, [r0, r1] adds r1, r1, #4 LoopCopyDataInit: ldr r0, =_sdata ldr r3, =_edata adds r2, r0, r1 cmp r2, r3 bcc CopyDataInit ldr r2, =_sbss b LoopFillZerobss /* Zero fill the bss segment. */ FillZerobss: movs r3, #0 str r3, [r2] adds r2, r2, #4 LoopFillZerobss: ldr r3, = _ebss cmp r2, r3 bcc FillZerobss /* Call the clock system intitialization function.*/ bl SystemInit /* 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 M0. 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 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word SVC_Handler .word 0 .word 0 .word PendSV_Handler .word SysTick_Handler .word WWDG_IRQHandler .word PVD_VDDIO2_IRQHandler .word RTC_IRQHandler .word FLASH_IRQHandler .word RCC_CRS_IRQHandler .word EXTI0_1_IRQHandler .word EXTI2_3_IRQHandler .word EXTI4_15_IRQHandler .word TSC_IRQHandler .word DMA1_Channel1_IRQHandler .word DMA1_Channel2_3_IRQHandler .word DMA1_Channel4_5_6_7_IRQHandler .word ADC1_COMP_IRQHandler .word TIM1_BRK_UP_TRG_COM_IRQHandler .word TIM1_CC_IRQHandler .word TIM2_IRQHandler .word TIM3_IRQHandler .word TIM6_DAC_IRQHandler .word TIM7_IRQHandler .word TIM14_IRQHandler .word TIM15_IRQHandler .word TIM16_IRQHandler .word TIM17_IRQHandler .word I2C1_IRQHandler .word I2C2_IRQHandler .word SPI1_IRQHandler .word SPI2_IRQHandler .word USART1_IRQHandler .word USART2_IRQHandler .word USART3_4_IRQHandler .word CEC_CAN_IRQHandler .word USB_IRQHandler .word BootRAM /* @0x108. This is for boot in RAM mode for STM32F0xx devices. */ /******************************************************************************* * * 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 SVC_Handler .thumb_set SVC_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_VDDIO2_IRQHandler .thumb_set PVD_VDDIO2_IRQHandler,Default_Handler .weak RTC_IRQHandler .thumb_set RTC_IRQHandler,Default_Handler .weak FLASH_IRQHandler .thumb_set FLASH_IRQHandler,Default_Handler .weak RCC_CRS_IRQHandler .thumb_set RCC_CRS_IRQHandler,Default_Handler .weak EXTI0_1_IRQHandler .thumb_set EXTI0_1_IRQHandler,Default_Handler .weak EXTI2_3_IRQHandler .thumb_set EXTI2_3_IRQHandler,Default_Handler .weak EXTI4_15_IRQHandler .thumb_set EXTI4_15_IRQHandler,Default_Handler .weak TSC_IRQHandler .thumb_set TSC_IRQHandler,Default_Handler .weak DMA1_Channel1_IRQHandler .thumb_set DMA1_Channel1_IRQHandler,Default_Handler .weak DMA1_Channel2_3_IRQHandler .thumb_set DMA1_Channel2_3_IRQHandler,Default_Handler .weak DMA1_Channel4_5_6_7_IRQHandler .thumb_set DMA1_Channel4_5_6_7_IRQHandler,Default_Handler .weak ADC1_COMP_IRQHandler .thumb_set ADC1_COMP_IRQHandler,Default_Handler .weak TIM1_BRK_UP_TRG_COM_IRQHandler .thumb_set TIM1_BRK_UP_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 TIM3_IRQHandler .thumb_set TIM3_IRQHandler,Default_Handler .weak TIM6_DAC_IRQHandler .thumb_set TIM6_DAC_IRQHandler,Default_Handler .weak TIM7_IRQHandler .thumb_set TIM7_IRQHandler,Default_Handler .weak TIM14_IRQHandler .thumb_set TIM14_IRQHandler,Default_Handler .weak TIM15_IRQHandler .thumb_set TIM15_IRQHandler,Default_Handler .weak TIM16_IRQHandler .thumb_set TIM16_IRQHandler,Default_Handler .weak TIM17_IRQHandler .thumb_set TIM17_IRQHandler,Default_Handler .weak I2C1_IRQHandler .thumb_set I2C1_IRQHandler,Default_Handler .weak I2C2_IRQHandler .thumb_set I2C2_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_4_IRQHandler .thumb_set USART3_4_IRQHandler,Default_Handler .weak CEC_CAN_IRQHandler .thumb_set CEC_CAN_IRQHandler,Default_Handler .weak USB_IRQHandler .thumb_set USB_IRQHandler,Default_Handler /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/