/** ****************************************************************************** * @file startup_stm32f10x_md.s * @author MCD Application Team / Angus Peart * @version V3.1.2 * @date 09/28/2009 * @brief STM32F10x Medium Density 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 * - 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. ******************************************************************************* * @copy * * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. * *

© COPYRIGHT 2009 STMicroelectronics

*/ .syntax unified .cpu cortex-m3 .fpu softvfp .thumb .global g_pfnVectors .global Default_Handler .global xPortIncreaseHeapSize .global Stack_Change /* 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: /* * From COrtex-M3 reference manual: * - Handler IRQ always use SP_main * - Process use SP_main or SP_process * Here, we will use beginning of SRAM for IRQ (SP_main) * and end of heap for initialization (SP_process). * Once the schedule starts, all threads will use their own stack * from heap and NOBOBY should use SP_process again. */ /* Do set/reset the stack pointers */ LDR r0, =_irq_stack_top MSR msp, r0 LDR r2, =_init_stack_top MSR psp, r2 /* check if irq and init stack are the same */ /* if they are, we don't do stack swap */ /* and lets bypass the monitoring as well for now */ cmp r0, r2 beq SectionBssInit /* DO * - stay in thread process mode * - stay in privilege level * - use process stack */ movs r0, #2 MSR control, r0 ISB /* Fill IRQ stack for watermark monitoring */ ldr r2, =_irq_stack_end b LoopFillIRQStack FillIRQStack: movw r3, #0xA5A5 str r3, [r2], #4 LoopFillIRQStack: ldr r3, = _irq_stack_top cmp r2, r3 bcc FillIRQStack SectionBssInit: /* 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 application's entry point.*/ bl main /* will never return here */ bx lr .size Reset_Handler, .-Reset_Handler /** * @brief This is the code that swaps stack (from end of heap to irq_stack). * Also reclaim the heap that was used as a stack. * @param None * @retval : None */ .section .text.Stack_Change .weak Stack_Change .type Stack_Change, %function Stack_Change: mov r4, lr /* Switches stack back momentarily to MSP */ movs r0, #0 msr control, r0 Heap_Reclaim: /* add heap_post_rtos to the heap (if the capability/function exist) */ /* Also claim the unused memory (between end of heap to end of memory */ /* CAREFULL: the heap section must be the last section in RAM in order this to work */ ldr r0, = _init_stack_size ldr r1, = _eheap_post_rtos ldr r2, = _eram subs r2, r2, r1 adds r0, r0, r2 bl xPortIncreaseHeapSize bx r4 .size Stack_Change, .-Stack_Change /** * @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 _irq_stack_top .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 vPortSVCHandler .word DebugMon_Handler .word 0 .word xPortPendSVHandler .word xPortSysTickHandler .word WWDG_IRQHandler .word PVD_IRQHandler .word TAMPER_IRQHandler .word RTC_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_2_IRQHandler .word USB_HP_CAN1_TX_IRQHandler .word USB_LP_CAN1_RX0_IRQHandler .word CAN1_RX1_IRQHandler .word CAN1_SCE_IRQHandler .word EXTI9_5_IRQHandler .word TIM1_BRK_IRQHandler .word TIM1_UP_IRQHandler .word TIM1_TRG_COM_IRQHandler .word TIM1_CC_IRQHandler .word TIM2_IRQHandler .word TIM3_IRQHandler .word TIM4_IRQHandler .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 RTCAlarm_IRQHandler .word USBWakeUp_IRQHandler .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word BootRAM /* @0x108. This is for boot in RAM mode for STM32F10x Medium Density 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 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_IRQHandler .thumb_set PVD_IRQHandler,Default_Handler .weak TAMPER_IRQHandler .thumb_set TAMPER_IRQHandler,Default_Handler .weak RTC_IRQHandler .thumb_set RTC_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_2_IRQHandler .thumb_set ADC1_2_IRQHandler,Default_Handler .weak USB_HP_CAN1_TX_IRQHandler .thumb_set USB_HP_CAN1_TX_IRQHandler,Default_Handler .weak USB_LP_CAN1_RX0_IRQHandler .thumb_set USB_LP_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_IRQHandler .thumb_set TIM1_BRK_IRQHandler,Default_Handler .weak TIM1_UP_IRQHandler .thumb_set TIM1_UP_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 TIM3_IRQHandler .thumb_set TIM3_IRQHandler,Default_Handler .weak TIM4_IRQHandler .thumb_set TIM4_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 RTCAlarm_IRQHandler .thumb_set RTCAlarm_IRQHandler,Default_Handler .weak USBWakeUp_IRQHandler .thumb_set USBWakeUp_IRQHandler,Default_Handler