startup.s

基于TI公司Cortex-M3的uart超级通信开发

        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     0                           ; Reserved
        DCD     IntDefaultHandler           ; Timer 5 subtimer A
        DCD     IntDefaultHandler           ; Timer 5 subtimer B
        DCD     IntDefaultHandler           ; Wide Timer 0 subtimer A
        DCD     IntDefaultHandler           ; Wide Timer 0 subtimer B
        DCD     IntDefaultHandler           ; Wide Timer 1 subtimer A
        DCD     IntDefaultHandler           ; Wide Timer 1 subtimer B
        DCD     IntDefaultHandler           ; Wide Timer 2 subtimer A
        DCD     IntDefaultHandler           ; Wide Timer 2 subtimer B
        DCD     IntDefaultHandler           ; Wide Timer 3 subtimer A
        DCD     IntDefaultHandler           ; Wide Timer 3 subtimer B
        DCD     IntDefaultHandler           ; Wide Timer 4 subtimer A
        DCD     IntDefaultHandler           ; Wide Timer 4 subtimer B
        DCD     IntDefaultHandler           ; Wide Timer 5 subtimer A
        DCD     IntDefaultHandler           ; Wide Timer 5 subtimer B
        DCD     IntDefaultHandler           ; FPU
        DCD     IntDefaultHandler           ; PECI 0
        DCD     IntDefaultHandler           ; LPC 0
        DCD     IntDefaultHandler           ; I2C4 Master and Slave
        DCD     IntDefaultHandler           ; I2C5 Master and Slave
        DCD     IntDefaultHandler           ; GPIO Port M
        DCD     IntDefaultHandler           ; GPIO Port N
        DCD     IntDefaultHandler           ; Quadrature Encoder 2
        DCD     IntDefaultHandler           ; Fan 0
        DCD     0                           ; Reserved
        DCD     IntDefaultHandler           ; GPIO Port P (Summary or P0)
        DCD     IntDefaultHandler           ; GPIO Port P1
        DCD     IntDefaultHandler           ; GPIO Port P2
        DCD     IntDefaultHandler           ; GPIO Port P3
        DCD     IntDefaultHandler           ; GPIO Port P4
        DCD     IntDefaultHandler           ; GPIO Port P5
        DCD     IntDefaultHandler           ; GPIO Port P6
        DCD     IntDefaultHandler           ; GPIO Port P7
        DCD     IntDefaultHandler           ; GPIO Port Q (Summary or Q0)
        DCD     IntDefaultHandler           ; GPIO Port Q1
        DCD     IntDefaultHandler           ; GPIO Port Q2
        DCD     IntDefaultHandler           ; GPIO Port Q3
        DCD     IntDefaultHandler           ; GPIO Port Q4
        DCD     IntDefaultHandler           ; GPIO Port Q5
        DCD     IntDefaultHandler           ; GPIO Port Q6
        DCD     IntDefaultHandler           ; GPIO Port Q7
        DCD     IntDefaultHandler           ; GPIO Port R
        DCD     IntDefaultHandler           ; GPIO Port S
        DCD     IntDefaultHandler           ; PWM 1 Generator 0
        DCD     IntDefaultHandler           ; PWM 1 Generator 1
        DCD     IntDefaultHandler           ; PWM 1 Generator 2
        DCD     IntDefaultHandler           ; PWM 1 Generator 3
        DCD     IntDefaultHandler           ; PWM 1 Fault

;******************************************************************************
;
; This is the code that gets called when the processor first starts execution
; following a reset event.
;
;******************************************************************************
        EXPORT  Reset_Handler
Reset_Handler
        ;
        ; Call the C library enty point that handles startup.  This will copy
        ; the .data section initializers from flash to SRAM and zero fill the
        ; .bss section.
        ;
        IMPORT  __main

        IF      {CPU} = "Cortex-M4.fp"
        LDR     R0, =0xE000ED88           ; Enable CP10,CP11
        LDR     R1,[R0]
        ORR     R1,R1,#(0xF << 20)
        STR     R1,[R0]
        ENDIF

        B       __main

;******************************************************************************
;
; This is the code that gets called when the processor receives a NMI.  This
; simply enters an infinite loop, preserving the system state for examination
; by a debugger.
;
;******************************************************************************
NmiSR
        B       NmiSR

;******************************************************************************
;
; This is the code that gets called when the processor receives a fault
; interrupt.  This simply enters an infinite loop, preserving the system state
; for examination by a debugger.
;
;******************************************************************************
FaultISR
        B       FaultISR

;******************************************************************************
;
; 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.
;
;******************************************************************************
IntDefaultHandler
        B       IntDefaultHandler

;******************************************************************************
;
; Make sure the end of this section is aligned.
;
;******************************************************************************
        ALIGN

;******************************************************************************
;
; Some code in the normal code section for initializing the heap and stack.
;
;******************************************************************************
        AREA    |.text|, CODE, READONLY

;******************************************************************************
;
; The function expected of the C library startup code for defining the stack
; and heap memory locations.  For the C library version of the startup code,
; provide this function so that the C library initialization code can find out
; the location of the stack and heap.
;
;******************************************************************************
    IF :DEF: __MICROLIB
        EXPORT  __initial_sp
        EXPORT  __heap_base
        EXPORT __heap_limit
    ELSE
        IMPORT  __use_two_region_memory
        EXPORT  __user_initial_stackheap
__user_initial_stackheap
        LDR     R0, =HeapMem
        LDR     R1, =(StackMem + Stack)
        LDR     R2, =(HeapMem + Heap)
        LDR     R3, =StackMem
        BX      LR
    ENDIF

;******************************************************************************
;
; Make sure the end of this section is aligned.
;
;******************************************************************************
        ALIGN

;******************************************************************************
;
; Tell the assembler that we're done.
;
;******************************************************************************
        END