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tinyUSB/hw/bsp/at32f425/startup_at32f425.s

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2025-07-07 14:13:15 +08:00
/**
******************************************************************************
* @file startup_at32f425.s
* @brief at32f425xx 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 and the external sram to
* be used as data memory (optional, to be enabled by user)
* - 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.
******************************************************************************
*/
.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
/* stack used for SystemInit_ExtMemCtl; always internal RAM used */
/**
* @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 initialization function.*/
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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
/* External Interrupts */
.word WWDT_IRQHandler /* Window Watchdog Timer */
.word PVM_IRQHandler /* PVM through EXINT Line detect */
.word ERTC_IRQHandler /* ERTC */
.word FLASH_IRQHandler /* Flash */
.word CRM_IRQHandler /* CRM */
.word EXINT1_0_IRQHandler /* EXINT Line 1 & 0 */
.word EXINT3_2_IRQHandler /* EXINT Line 3 & 2 */
.word EXINT15_4_IRQHandler /* EXINT Line 15 ~ 4 */
.word ACC_IRQHandler /* ACC */
.word DMA1_Channel1_IRQHandler /* DMA1 Channel 1 */
.word DMA1_Channel3_2_IRQHandler /* DMA1 Channel 3 & 2 */
.word DMA1_Channel7_4_IRQHandler /* DMA1 Channel 7 & 4 */
.word ADC1_IRQHandler /* ADC1 */
.word TMR1_BRK_OVF_TRG_HALL_IRQHandler /* TMR1 brake overflow trigger and hall */
.word TMR1_CH_IRQHandler /* TMR1 channel */
.word TMR2_GLOBAL_IRQHandler /* TMR2 */
.word TMR3_GLOBAL_IRQHandler /* TMR3 */
.word TMR6_GLOBAL_IRQHandler /* TMR6 */
.word TMR7_GLOBAL_IRQHandler /* TMR7 */
.word TMR14_GLOBAL_IRQHandler /* TMR14 */
.word TMR15_GLOBAL_IRQHandler /* TMR15 */
.word TMR16_GLOBAL_IRQHandler /* TMR16 */
.word TMR17_GLOBAL_IRQHandler /* TMR17 */
.word I2C1_EVT_IRQHandler /* I2C1 Event */
.word I2C2_EVT_IRQHandler /* I2C2 Event */
.word SPI1_IRQHandler /* SPI1 */
.word SPI2_IRQHandler /* SPI2 */
.word USART1_IRQHandler /* USART1 */
.word USART2_IRQHandler /* USART2 */
.word USART4_3_IRQHandler /* USART3 & USART4 */
.word CAN1_IRQHandler /* CAN1 */
.word OTGFS1_IRQHandler /* OTGFS1 */
.word I2C1_ERR_IRQHandler /* I2C1 Error */
.word SPI3_IRQHandler /* SPI3 */
.word I2C2_ERR_IRQHandler /* I2C2 Error */
.word TMR13_GLOBAL_IRQHandler /* TMR13 */
/*******************************************************************************
*
* 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 WWDT_IRQHandler
.thumb_set WWDT_IRQHandler,Default_Handler
.weak PVM_IRQHandler
.thumb_set PVM_IRQHandler,Default_Handler
.weak ERTC_IRQHandler
.thumb_set ERTC_IRQHandler,Default_Handler
.weak FLASH_IRQHandler
.thumb_set FLASH_IRQHandler,Default_Handler
.weak CRM_IRQHandler
.thumb_set CRM_IRQHandler,Default_Handler
.weak EXINT1_0_IRQHandler
.thumb_set EXINT1_0_IRQHandler,Default_Handler
.weak EXINT3_2_IRQHandler
.thumb_set EXINT3_2_IRQHandler,Default_Handler
.weak EXINT15_4_IRQHandler
.thumb_set EXINT15_4_IRQHandler,Default_Handler
.weak ACC_IRQHandler
.thumb_set ACC_IRQHandler,Default_Handler
.weak DMA1_Channel1_IRQHandler
.thumb_set DMA1_Channel1_IRQHandler,Default_Handler
.weak DMA1_Channel3_2_IRQHandler
.thumb_set DMA1_Channel3_2_IRQHandler,Default_Handler
.weak DMA1_Channel7_4_IRQHandler
.thumb_set DMA1_Channel7_4_IRQHandler,Default_Handler
.weak ADC1_IRQHandler
.thumb_set ADC1_IRQHandler,Default_Handler
.weak TMR1_BRK_OVF_TRG_HALL_IRQHandler
.thumb_set TMR1_BRK_OVF_TRG_HALL_IRQHandler,Default_Handler
.weak TMR1_CH_IRQHandler
.thumb_set TMR1_CH_IRQHandler,Default_Handler
.weak TMR2_GLOBAL_IRQHandler
.thumb_set TMR2_GLOBAL_IRQHandler,Default_Handler
.weak TMR3_GLOBAL_IRQHandler
.thumb_set TMR3_GLOBAL_IRQHandler,Default_Handler
.weak TMR6_GLOBAL_IRQHandler
.thumb_set TMR6_GLOBAL_IRQHandler,Default_Handler
.weak TMR7_GLOBAL_IRQHandler
.thumb_set TMR7_GLOBAL_IRQHandler,Default_Handler
.weak TMR14_GLOBAL_IRQHandler
.thumb_set TMR14_GLOBAL_IRQHandler,Default_Handler
.weak TMR15_GLOBAL_IRQHandler
.thumb_set TMR15_GLOBAL_IRQHandler,Default_Handler
.weak TMR16_GLOBAL_IRQHandler
.thumb_set TMR16_GLOBAL_IRQHandler,Default_Handler
.weak TMR17_GLOBAL_IRQHandler
.thumb_set TMR17_GLOBAL_IRQHandler,Default_Handler
.weak I2C1_EVT_IRQHandler
.thumb_set I2C1_EVT_IRQHandler,Default_Handler
.weak I2C2_EVT_IRQHandler
.thumb_set I2C2_EVT_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 USART4_3_IRQHandler
.thumb_set USART4_3_IRQHandler,Default_Handler
.weak CAN1_IRQHandler
.thumb_set CAN1_IRQHandler,Default_Handler
.weak OTGFS1_IRQHandler
.thumb_set OTGFS1_IRQHandler,Default_Handler
.weak I2C1_ERR_IRQHandler
.thumb_set I2C1_ERR_IRQHandler,Default_Handler
.weak SPI3_IRQHandler
.thumb_set SPI3_IRQHandler,Default_Handler
.weak I2C2_ERR_IRQHandler
.thumb_set I2C2_ERR_IRQHandler,Default_Handler
.weak TMR13_GLOBAL_IRQHandler
.thumb_set TMR13_GLOBAL_IRQHandler,Default_Handler