Mercurial > public > ostc4
view Small_CPU/Src/startup_stm32f4xx.S @ 886:d398ecc7d103 Evo_2_23
Improve communication stability:
In case e.g. the bluetooth module has just been started some 'noice' characters may be in the receive buffer causing an error in the modul responds function. In case the legth of the response is unexpected then the buffer will be evaluated till it is empty or an matching answer is found.
| author | Ideenmodellierer |
|---|---|
| date | Sun, 01 Sep 2024 21:38:06 +0200 |
| parents | 22864a24973b |
| children |
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/* File: startup_ARMCM4.S * Purpose: startup file for Cortex-M4 devices. Should use with * GCC for ARM Embedded Processors * Version: V1.3 * Date: 08 Feb 2012 * * Copyright (c) 2012, ARM Limited * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the ARM Limited nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL ARM LIMITED BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ .syntax unified .arch armv7-m .section .stack .align 3 #ifdef __STACK_SIZE .equ Stack_Size, __STACK_SIZE #else .equ Stack_Size, 0x400 #endif .globl __StackTop .globl __StackLimit __StackLimit: .space Stack_Size .size __StackLimit, . - __StackLimit __StackTop: .size __StackTop, . - __StackTop .section .heap .align 3 #ifdef __HEAP_SIZE .equ Heap_Size, __HEAP_SIZE #else .equ Heap_Size, 0xC00 #endif .globl __HeapBase .globl __HeapLimit __HeapBase: .if Heap_Size .space Heap_Size .endif .size __HeapBase, . - __HeapBase __HeapLimit: .size __HeapLimit, . - __HeapLimit .section .isr_vector .align 2 .globl __isr_vector __isr_vector: .long __StackTop /* Top of Stack */ .long Reset_Handler /* Reset Handler */ .long NMI_Handler /* NMI Handler */ .long HardFault_Handler /* Hard Fault Handler */ .long MemManage_Handler /* MPU Fault Handler */ .long BusFault_Handler /* Bus Fault Handler */ .long UsageFault_Handler /* Usage Fault Handler */ .long 0 /* Reserved */ .long 0 /* Reserved */ .long 0 /* Reserved */ .long 0 /* Reserved */ .long SVC_Handler /* SVCall Handler */ .long DebugMon_Handler /* Debug Monitor Handler */ .long 0 /* Reserved */ .long PendSV_Handler /* PendSV Handler */ .long SysTick_Handler /* SysTick Handler */ // External Interrupts .long WWDG_IRQHandler // Window WatchDog .long PVD_IRQHandler // PVD through EXTI Line detection .long TAMP_STAMP_IRQHandler // Tamper and TimeStamps through the EXTI line .long RTC_WKUP_IRQHandler // RTC Wakeup through the EXTI line .long FLASH_IRQHandler // FLASH .long RCC_IRQHandler // RCC .long EXTI0_IRQHandler // EXTI Line0 .long EXTI1_IRQHandler // EXTI Line1 .long EXTI2_IRQHandler // EXTI Line2 .long EXTI3_IRQHandler // EXTI Line3 .long EXTI4_IRQHandler // EXTI Line4 .long DMA1_Stream0_IRQHandler // DMA1 Stream 0 .long DMA1_Stream1_IRQHandler // DMA1 Stream 1 .long DMA1_Stream2_IRQHandler // DMA1 Stream 2 .long DMA1_Stream3_IRQHandler // DMA1 Stream 3 .long DMA1_Stream4_IRQHandler // DMA1 Stream 4 .long DMA1_Stream5_IRQHandler // DMA1 Stream 5 .long DMA1_Stream6_IRQHandler // DMA1 Stream 6 .long ADC_IRQHandler // ADC1, ADC2 and ADC3s .long CAN1_TX_IRQHandler // CAN1 TX .long CAN1_RX0_IRQHandler // CAN1 RX0 .long CAN1_RX1_IRQHandler // CAN1 RX1 .long CAN1_SCE_IRQHandler // CAN1 SCE .long EXTI9_5_IRQHandler // External Line[9:5]s .long TIM1_BRK_TIM9_IRQHandler // TIM1 Break and TIM9 .long TIM1_UP_TIM10_IRQHandler // TIM1 Update and TIM10 .long TIM1_TRG_COM_TIM11_IRQHandler // TIM1 Trigger and Commutation and TIM11 .long TIM1_CC_IRQHandler // TIM1 Capture Compare .long TIM2_IRQHandler // TIM2 .long TIM3_IRQHandler // TIM3 .long TIM4_IRQHandler // TIM4 .long I2C1_EV_IRQHandler // I2C1 Event .long I2C1_ER_IRQHandler // I2C1 Error .long I2C2_EV_IRQHandler // I2C2 Event .long I2C2_ER_IRQHandler // I2C2 Error .long SPI1_IRQHandler // SPI1 .long SPI2_IRQHandler // SPI2 .long USART1_IRQHandler // USART1 .long USART2_IRQHandler // USART2 .long USART3_IRQHandler // USART3 .long EXTI15_10_IRQHandler // External Line[15:10]s .long RTC_Alarm_IRQHandler // RTC Alarm (A and B) through EXTI Line .long OTG_FS_WKUP_IRQHandler // USB OTG FS Wakeup through EXTI line .long TIM8_BRK_TIM12_IRQHandler // TIM8 Break and TIM12 .long TIM8_UP_TIM13_IRQHandler // TIM8 Update and TIM13 .long TIM8_TRG_COM_TIM14_IRQHandler // TIM8 Trigger and Commutation and TIM14 .long TIM8_CC_IRQHandler // TIM8 Capture Compare .long DMA1_Stream7_IRQHandler // DMA1 Stream7 .long FSMC_IRQHandler // FSMC .long SDIO_IRQHandler // SDIO .long TIM5_IRQHandler // TIM5 .long SPI3_IRQHandler // SPI3 .long UART4_IRQHandler // UART4 .long UART5_IRQHandler // UART5 .long TIM6_DAC_IRQHandler // TIM6 and DAC1&2 underrun errors .long TIM7_IRQHandler // TIM7 .long DMA2_Stream0_IRQHandler // DMA2 Stream 0 .long DMA2_Stream1_IRQHandler // DMA2 Stream 1 .long DMA2_Stream2_IRQHandler // DMA2 Stream 2 .long DMA2_Stream3_IRQHandler // DMA2 Stream 3 .long DMA2_Stream4_IRQHandler // DMA2 Stream 4 .long ETH_IRQHandler // Ethernet .long ETH_WKUP_IRQHandler // Ethernet Wakeup through EXTI line .long CAN2_TX_IRQHandler // CAN2 TX .long CAN2_RX0_IRQHandler // CAN2 RX0 .long CAN2_RX1_IRQHandler // CAN2 RX1 .long CAN2_SCE_IRQHandler // CAN2 SCE .long OTG_FS_IRQHandler // USB OTG FS .long DMA2_Stream5_IRQHandler // DMA2 Stream 5 .long DMA2_Stream6_IRQHandler // DMA2 Stream 6 .long DMA2_Stream7_IRQHandler // DMA2 Stream 7 .long USART6_IRQHandler // USART6 .long I2C3_EV_IRQHandler // I2C3 event .long I2C3_ER_IRQHandler // I2C3 error .long OTG_HS_EP1_OUT_IRQHandler // USB OTG HS End Point 1 Out .long OTG_HS_EP1_IN_IRQHandler // USB OTG HS End Point 1 In .long OTG_HS_WKUP_IRQHandler // USB OTG HS Wakeup through EXTI .long OTG_HS_IRQHandler // USB OTG HS .long DCMI_IRQHandler // DCMI .long CRYP_IRQHandler // CRYP crypto .long HASH_RNG_IRQHandler // Hash and Rng .long FPU_IRQHandler // FPU .size __isr_vector, . - __isr_vector .text .thumb .thumb_func .align 2 .globl Reset_Handler .type Reset_Handler, %function Reset_Handler: /* Loop to copy data from read only memory to RAM. The ranges * of copy from/to are specified by following symbols evaluated in * linker script. * __etext: End of code section, i.e., begin of data sections to copy from. * __data_start__/__data_end__: RAM address range that data should be * copied to. Both must be aligned to 4 bytes boundary. */ ldr r1, =_sidata /*__etext*/ ldr r2, =__data_start__ ldr r3, =__data_end__ #if 1 /* Here are two copies of loop implemenations. First one favors code size * and the second one favors performance. Default uses the first one. * Change to "#if 0" to use the second one */ .flash_to_ram_loop: cmp r2, r3 ittt lt ldrlt r0, [r1], #4 strlt r0, [r2], #4 blt .flash_to_ram_loop #else subs r3, r2 ble .flash_to_ram_loop_end .flash_to_ram_loop: subs r3, #4 ldr r0, [r1, r3] str r0, [r2, r3] bgt .flash_to_ram_loop .flash_to_ram_loop_end: #endif #ifndef __NO_SYSTEM_INIT ldr r0, =SystemInit blx r0 #endif ldr r0, =_start bx r0 .pool .size Reset_Handler, . - Reset_Handler /* Our weak _start alternative if we don't use the library _start * The zero init section must be cleared, otherwise the librtary is * doing that */ .align 1 .thumb_func .weak _start .type _start, %function _start: /* Zero fill the bss segment. */ ldr r1, = __bss_start__ ldr r2, = __bss_end__ movs r3, #0 b .fill_zero_bss .loop_zero_bss: str r3, [r1], #4 .fill_zero_bss: cmp r1, r2 bcc .loop_zero_bss /* Jump to our main */ bl main b . .size _start, . - _start /* Macro to define default handlers. Default handler * will be weak symbol and just dead loops. They can be * overwritten by other handlers */ .macro def_irq_handler handler_name .align 1 .thumb_func .weak \handler_name .type \handler_name, %function \handler_name : b . .size \handler_name, . - \handler_name .endm def_irq_handler NMI_Handler def_irq_handler HardFault_Handler def_irq_handler MemManage_Handler def_irq_handler BusFault_Handler def_irq_handler UsageFault_Handler def_irq_handler SVC_Handler def_irq_handler DebugMon_Handler def_irq_handler PendSV_Handler def_irq_handler SysTick_Handler def_irq_handler Default_Handler // External Interrupts def_irq_handler WWDG_IRQHandler // Window WatchDog def_irq_handler PVD_IRQHandler // PVD through EXTI Line detection def_irq_handler TAMP_STAMP_IRQHandler // Tamper and TimeStamps through the EXTI line def_irq_handler RTC_WKUP_IRQHandler // RTC Wakeup through the EXTI line def_irq_handler FLASH_IRQHandler // FLASH def_irq_handler RCC_IRQHandler // RCC def_irq_handler EXTI0_IRQHandler // EXTI Line0 def_irq_handler EXTI1_IRQHandler // EXTI Line1 def_irq_handler EXTI2_IRQHandler // EXTI Line2 def_irq_handler EXTI3_IRQHandler // EXTI Line3 def_irq_handler EXTI4_IRQHandler // EXTI Line4 def_irq_handler DMA1_Stream0_IRQHandler // DMA1 Stream 0 def_irq_handler DMA1_Stream1_IRQHandler // DMA1 Stream 1 def_irq_handler DMA1_Stream2_IRQHandler // DMA1 Stream 2 def_irq_handler DMA1_Stream3_IRQHandler // DMA1 Stream 3 def_irq_handler DMA1_Stream4_IRQHandler // DMA1 Stream 4 def_irq_handler DMA1_Stream5_IRQHandler // DMA1 Stream 5 def_irq_handler DMA1_Stream6_IRQHandler // DMA1 Stream 6 def_irq_handler ADC_IRQHandler // ADC1, ADC2 and ADC3s def_irq_handler CAN1_TX_IRQHandler // CAN1 TX def_irq_handler CAN1_RX0_IRQHandler // CAN1 RX0 def_irq_handler CAN1_RX1_IRQHandler // CAN1 RX1 def_irq_handler CAN1_SCE_IRQHandler // CAN1 SCE def_irq_handler EXTI9_5_IRQHandler // External Line[9:5]s def_irq_handler TIM1_BRK_TIM9_IRQHandler // TIM1 Break and TIM9 def_irq_handler TIM1_UP_TIM10_IRQHandler // TIM1 Update and TIM10 def_irq_handler TIM1_TRG_COM_TIM11_IRQHandler // TIM1 Trigger and Commutation and TIM11 def_irq_handler TIM1_CC_IRQHandler // TIM1 Capture Compare def_irq_handler TIM2_IRQHandler // TIM2 def_irq_handler TIM3_IRQHandler // TIM3 def_irq_handler TIM4_IRQHandler // TIM4 def_irq_handler I2C1_EV_IRQHandler // I2C1 Event def_irq_handler I2C1_ER_IRQHandler // I2C1 Error def_irq_handler I2C2_EV_IRQHandler // I2C2 Event def_irq_handler I2C2_ER_IRQHandler // I2C2 Error def_irq_handler SPI1_IRQHandler // SPI1 def_irq_handler SPI2_IRQHandler // SPI2 def_irq_handler USART1_IRQHandler // USART1 def_irq_handler USART2_IRQHandler // USART2 def_irq_handler USART3_IRQHandler // USART3 def_irq_handler EXTI15_10_IRQHandler // External Line[15:10]s def_irq_handler RTC_Alarm_IRQHandler // RTC Alarm (A and B) through EXTI Line def_irq_handler OTG_FS_WKUP_IRQHandler // USB OTG FS Wakeup through EXTI line def_irq_handler TIM8_BRK_TIM12_IRQHandler // TIM8 Break and TIM12 def_irq_handler TIM8_UP_TIM13_IRQHandler // TIM8 Update and TIM13 def_irq_handler TIM8_TRG_COM_TIM14_IRQHandler // TIM8 Trigger and Commutation and TIM14 def_irq_handler TIM8_CC_IRQHandler // TIM8 Capture Compare def_irq_handler DMA1_Stream7_IRQHandler // DMA1 Stream7 def_irq_handler FSMC_IRQHandler // FSMC def_irq_handler SDIO_IRQHandler // SDIO def_irq_handler TIM5_IRQHandler // TIM5 def_irq_handler SPI3_IRQHandler // SPI3 def_irq_handler UART4_IRQHandler // UART4 def_irq_handler UART5_IRQHandler // UART5 def_irq_handler TIM6_DAC_IRQHandler // TIM6 and DAC1&2 underrun errors def_irq_handler TIM7_IRQHandler // TIM7 def_irq_handler DMA2_Stream0_IRQHandler // DMA2 Stream 0 def_irq_handler DMA2_Stream1_IRQHandler // DMA2 Stream 1 def_irq_handler DMA2_Stream2_IRQHandler // DMA2 Stream 2 def_irq_handler DMA2_Stream3_IRQHandler // DMA2 Stream 3 def_irq_handler DMA2_Stream4_IRQHandler // DMA2 Stream 4 def_irq_handler ETH_IRQHandler // Ethernet def_irq_handler ETH_WKUP_IRQHandler // Ethernet Wakeup through EXTI line def_irq_handler CAN2_TX_IRQHandler // CAN2 TX def_irq_handler CAN2_RX0_IRQHandler // CAN2 RX0 def_irq_handler CAN2_RX1_IRQHandler // CAN2 RX1 def_irq_handler CAN2_SCE_IRQHandler // CAN2 SCE def_irq_handler OTG_FS_IRQHandler // USB OTG FS def_irq_handler DMA2_Stream5_IRQHandler // DMA2 Stream 5 def_irq_handler DMA2_Stream6_IRQHandler // DMA2 Stream 6 def_irq_handler DMA2_Stream7_IRQHandler // DMA2 Stream 7 def_irq_handler USART6_IRQHandler // USART6 def_irq_handler I2C3_EV_IRQHandler // I2C3 event def_irq_handler I2C3_ER_IRQHandler // I2C3 error def_irq_handler OTG_HS_EP1_OUT_IRQHandler // USB OTG HS End Point 1 Out def_irq_handler OTG_HS_EP1_IN_IRQHandler // USB OTG HS End Point 1 In def_irq_handler OTG_HS_WKUP_IRQHandler // USB OTG HS Wakeup through EXTI def_irq_handler OTG_HS_IRQHandler // USB OTG HS def_irq_handler DCMI_IRQHandler // DCMI def_irq_handler CRYP_IRQHandler // CRYP crypto def_irq_handler HASH_RNG_IRQHandler // Hash and Rng def_irq_handler FPU_IRQHandler // FPU .end