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发表于 2009-10-17 01:29:16
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其实 mdk 以及 iar 都带着 lm3s的几种测试版的软件的，你查下example下的ti文件，boards下就有lm3s1968的例子
里面就有start up 文件，其实ti的lm3s的驱动库也有。下面就是ti的mdk下的bootloader，使用汇编写的
iar 的是使用c写的，里面嵌套汇编。驱动库里面都有，注释也不错。
; This is part of revision 4905 of the EK-LM3S1968 Firmware Package.
;
;******************************************************************************
;******************************************************************************
;
; <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
;
;******************************************************************************
Stack EQU 0x00000100
;******************************************************************************
;
; <o> Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
;
;******************************************************************************
Heap EQU 0x00000000
;******************************************************************************
;
; Allocate space for the stack.
;
;******************************************************************************
AREA STACK, NOINIT, READWRITE, ALIGN=3
StackMem
SPACE Stack
__initial_sp
;******************************************************************************
;
; Allocate space for the heap.
;
;******************************************************************************
AREA HEAP, NOINIT, READWRITE, ALIGN=3
__heap_base
HeapMem
SPACE Heap
__heap_limit
;******************************************************************************
;
; Indicate that the code in this file preserves 8-byte alignment of the stack.
;
;******************************************************************************
PRESERVE8
;******************************************************************************
;
; Place code into the reset code section.
;
;******************************************************************************
AREA RESET, CODE, READONLY
THUMB
;******************************************************************************
;
; The vector table.
;
;******************************************************************************
EXPORT __Vectors
__Vectors
DCD StackMem + Stack ; Top of Stack
DCD Reset_Handler ; Reset Handler
DCD NmiSR ; NMI Handler
DCD FaultISR ; Hard Fault Handler
DCD IntDefaultHandler ; The MPU fault handler
DCD IntDefaultHandler ; The bus fault handler
DCD IntDefaultHandler ; The usage fault handler
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD IntDefaultHandler ; SVCall handler
DCD IntDefaultHandler ; Debug monitor handler
DCD 0 ; Reserved
DCD IntDefaultHandler ; The PendSV handler
DCD IntDefaultHandler ; The SysTick handler
DCD IntDefaultHandler ; GPIO Port A
DCD IntDefaultHandler ; GPIO Port B
DCD IntDefaultHandler ; GPIO Port C
DCD IntDefaultHandler ; GPIO Port D
DCD IntDefaultHandler ; GPIO Port E
DCD IntDefaultHandler ; UART0 Rx and Tx
DCD IntDefaultHandler ; UART1 Rx and Tx
DCD IntDefaultHandler ; SSI0 Rx and Tx
DCD IntDefaultHandler ; I2C0 Master and Slave
DCD IntDefaultHandler ; PWM Fault
DCD IntDefaultHandler ; PWM Generator 0
DCD IntDefaultHandler ; PWM Generator 1
DCD IntDefaultHandler ; PWM Generator 2
DCD IntDefaultHandler ; Quadrature Encoder 0
DCD IntDefaultHandler ; ADC Sequence 0
DCD IntDefaultHandler ; ADC Sequence 1
DCD IntDefaultHandler ; ADC Sequence 2
DCD IntDefaultHandler ; ADC Sequence 3
DCD IntDefaultHandler ; Watchdog timer
DCD IntDefaultHandler ; Timer 0 subtimer A
DCD IntDefaultHandler ; Timer 0 subtimer B
DCD IntDefaultHandler ; Timer 1 subtimer A
DCD IntDefaultHandler ; Timer 1 subtimer B
DCD IntDefaultHandler ; Timer 2 subtimer A
DCD IntDefaultHandler ; Timer 2 subtimer B
DCD IntDefaultHandler ; Analog Comparator 0
DCD IntDefaultHandler ; Analog Comparator 1
DCD IntDefaultHandler ; Analog Comparator 2
DCD IntDefaultHandler ; System Control (PLL, OSC, BO)
DCD IntDefaultHandler ; FLASH Control
DCD IntDefaultHandler ; GPIO Port F
DCD IntDefaultHandler ; GPIO Port G
DCD IntDefaultHandler ; GPIO Port H
DCD IntDefaultHandler ; UART2 Rx and Tx
DCD IntDefaultHandler ; SSI1 Rx and Tx
DCD IntDefaultHandler ; Timer 3 subtimer A
DCD IntDefaultHandler ; Timer 3 subtimer B
DCD IntDefaultHandler ; I2C1 Master and Slave
DCD IntDefaultHandler ; Quadrature Encoder 1
DCD IntDefaultHandler ; CAN0
DCD IntDefaultHandler ; CAN1
DCD IntDefaultHandler ; CAN2
DCD IntDefaultHandler ; Ethernet
DCD IntDefaultHandler ; Hibernate
;******************************************************************************
;
; 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
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 |
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