/* 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-M3 processor is in Thread mode, * priority is Privileged, and the Stack is set to Main. ****************************************************************************** */ .syntax unified .cpu cortex-m3 .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: /* 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], #4 LoopFillZerobss: ldr r3, = _ebss cmp r2, r3 bcc FillZerobss /* Call the clock system intitialization function.*/ bl SystemInit /* Call static constructors */ bl __libc_init_array /* Call the application's entry point.*/ bl main bx lr .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 M3. 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 LVD_IRQHandler .word RTC_IRQHandler .word FMC_IRQHandler .word RCU_IRQHandler .word EXTI0_1_IRQHandler .word EXTI2_3_IRQHandler .word EXTI4_15_IRQHandler .word TSI_IRQHandler .word DMA_Channel0_IRQHandler .word DMA_Channel1_2_IRQHandler .word DMA_Channel3_4_IRQHandler .word ADC_CMP_IRQHandler .word TIMER0_BRK_UP_TRG_COM_IRQHandler .word TIMER0_Channel_IRQHandler .word TIMER1_IRQHandler .word TIMER2_IRQHandler .word TIMER5_DAC_IRQHandler .word 0 .word TIMER13_IRQHandler .word TIMER14_IRQHandler .word TIMER15_IRQHandler .word TIMER16_IRQHandler .word I2C0_EV_IRQHandler .word I2C1_EV_IRQHandler .word SPI0_IRQHandler .word SPI1_IRQHandler .word USART0_IRQHandler .word USART1_IRQHandler .word 0 .word CEC_IRQHandler .word 0 .word I2C0_ER_IRQHandler .word 0 .word I2C1_ER_IRQHandler .word I2C2_EV_IRQHandler .word I2C2_ER_IRQHandler .word USBD_LP_IRQHandler .word USBD_HP_IRQHandler .word 0 .word 0 .word 0 .word USBDWakeUp_IRQHandler .word CAN0_TX_IRQHandler .word CAN0_RX0_IRQHandler .word CAN0_RX1_IRQHandler .word CAN0_SCE_IRQHandler .word SLCD_IRQHandler .word DMA_Channel5_6_IRQHandler .word 0 .word 0 .word SPI2_IRQHandler .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word CAN1_TX_IRQHandler .word CAN1_RX0_IRQHandler .word CAN1_RX1_IRQHandler .word CAN1_SCE_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 LVD_IRQHandler .thumb_set LVD_IRQHandler,Default_Handler .weak RTC_IRQHandler .thumb_set RTC_IRQHandler,Default_Handler .weak FMC_IRQHandler .thumb_set FMC_IRQHandler,Default_Handler .weak RCU_IRQHandler .thumb_set RCC_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 TSI_IRQHandler .thumb_set TSI_IRQHandler,Default_Handler .weak DMA_Channel0_IRQHandler .thumb_set DMA_Channel0_IRQHandler,Default_Handler .weak DMA_Channel1_2_IRQHandler .thumb_set DMA_Channel1_2_IRQHandler,Default_Handler .weak DMA_Channel3_4_IRQHandler .thumb_set DMA_Channel3_4_IRQHandler,Default_Handler .weak ADC_CMP_IRQHandler .thumb_set ADC_CMP_IRQHandler,Default_Handler .weak TIMER0_BRK_UP_TRG_COM_IRQHandler .thumb_set TIMER0_BRK_UP_TRG_COM_IRQHandler,Default_Handler .weak TIMER0_Channel_IRQHandler .thumb_set TIMER0_Channel_IRQHandler,Default_Handler .weak TIMER1_IRQHandler .thumb_set TIMER1_IRQHandler,Default_Handler .weak TIMER2_IRQHandler .thumb_set TIMER2_IRQHandler,Default_Handler .weak TIMER5_DAC_IRQHandler .thumb_set TIMER5_DAC_IRQHandler,Default_Handler .weak TIMER13_IRQHandler .thumb_set TIMER13_IRQHandler,Default_Handler .weak TIMER14_IRQHandler .thumb_set TIMER14_IRQHandler,Default_Handler .weak TIMER15_IRQHandler .thumb_set TIMER15_IRQHandler,Default_Handler .weak TIMER16_IRQHandler .thumb_set TIMER16_IRQHandler,Default_Handler .weak I2C0_EV_IRQHandler .thumb_set I2C0_EV_IRQHandler,Default_Handler .weak I2C1_EV_IRQHandler .thumb_set I2C1_EV_IRQHandler,Default_Handler .weak SPI0_IRQHandler .thumb_set SPI0_IRQHandler,Default_Handler .weak SPI1_IRQHandler .thumb_set SPI1_IRQHandler,Default_Handler .weak USART0_IRQHandler .thumb_set USART0_IRQHandler,Default_Handler .weak USART1_IRQHandler .thumb_set USART1_IRQHandler,Default_Handler .weak CEC_IRQHandler .thumb_set CEC_IRQHandler,Default_Handler .weak I2C0_ER_IRQHandler .thumb_set I2C0_ER_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 USBD_LP_IRQHandler .thumb_set USBD_LP_IRQHandler,Default_Handler .weak USBD_HP_IRQHandler .thumb_set USBD_HP_IRQHandler,Default_Handler .weak USBDWakeUp_IRQHandler .thumb_set USBDWakeUp_IRQHandler,Default_Handler .weak CAN0_TX_IRQHandler .thumb_set CAN0_TX_IRQHandler,Default_Handler .weak CAN0_RX0_IRQHandler .thumb_set CAN0_RX0_IRQHandler,Default_Handler .weak CAN0_RX1_IRQHandler .thumb_set CAN0_RX1_IRQHandler,Default_Handler .weak CAN0_SCE_IRQHandler .thumb_set CAN0_SCE_IRQHandler,Default_Handler .weak SLCD_IRQHandler .thumb_set SLCD_IRQHandler,Default_Handler .weak DMA_Channel5_6_IRQHandler .thumb_set DMA_Channel5_6_IRQHandler,Default_Handler .weak SPI2_IRQHandler .thumb_set SPI2_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