EEPW论坛

     rINTPND=rINTPND;  //同上

清未决应该用 |=

还是不能工作。。。

我上传一下启动代码看看吧。。。

这个启动代码是我从一个项目里找的现成的，不知道是适合这个

 GET option.inc
 GET memcfg.inc
 GET 2440addr.inc

BIT_SELFREFRESH EQU (1<<22)

;Pre-defined constants
USERMODE    EQU  0x10
FIQMODE     EQU  0x11
IRQMODE     EQU  0x12
SVCMODE     EQU  0x13
ABORTMODE   EQU  0x17
UNDEFMODE   EQU  0x1b
MODEMASK    EQU  0x1f
NOINT       EQU  0xc0

;The location of stacks
UserStack EQU (_STACK_BASEADDRESS-0x3800) ;0x33ff4800 ~
SVCStack EQU (_STACK_BASEADDRESS-0x2800) ;0x33ff5800 ~
UndefStack EQU (_STACK_BASEADDRESS-0x2400) ;0x33ff5c00 ~
AbortStack EQU (_STACK_BASEADDRESS-0x2000) ;0x33ff6000 ~
IRQStack EQU (_STACK_BASEADDRESS-0x1000) ;0x33ff7000 ~
FIQStack EQU (_STACK_BASEADDRESS-0x0) ;0x33ff8000 ~

;Check if tasm.exe(armasm -16 ...@ADS 1.0) is used.
 GBLL    THUMBCODE
 [ {CONFIG} = 16
THUMBCODE SETL  {TRUE}
     CODE32
   |
THUMBCODE SETL  {FALSE}
    ]

   MACRO
 MOV_PC_LR
   [ THUMBCODE
     bx lr
   |
     mov pc,lr
   ]
 MEND

   MACRO
 MOVEQ_PC_LR
   [ THUMBCODE
        bxeq lr
   |
     moveq pc,lr
   ]
 MEND

   MACRO
$HandlerLabel HANDLER $HandleLabel

$HandlerLabel
 sub sp,sp,#4 ;decrement sp(to store jump address)
 stmfd sp!,{r0} ;PUSH the work register to stack(lr does't push because it return to original address)
 ldr     r0,=$HandleLabel;load the address of HandleXXX to r0
 ldr     r0,[r0]  ;load the contents(service routine start address) of HandleXXX
 str     r0,[sp,#4]      ;store the contents(ISR) of HandleXXX to stack
 ldmfd   sp!,{r0,pc}     ;POP the work register and pc(jump to ISR)
 MEND

 IMPORT  |Image$$RO$$Limit|  ; End of ROM code (=start of ROM data)
 IMPORT  |Image$$RW$$Base|   ; Base of RAM to initialise
 IMPORT  |Image$$ZI$$Base|   ; Base and limit of area
 IMPORT  |Image$$ZI$$Limit|  ; to zero initialise

 IMPORT Main

 AREA    Init,CODE,READONLY

 ENTRY

 ;1)The code, which converts to Big-endian, should be in little endian code.
 ;2)The following little endian code will be compiled in Big-Endian mode.
 ;  The code byte order should be changed as the memory bus width.
 ;3)The pseudo instruction,DCD can't be used here because the linker generates error.
 ASSERT :DEF:ENDIAN_CHANGE
 [ ENDIAN_CHANGE
     ASSERT  :DEF:ENTRY_BUS_WIDTH
     [ ENTRY_BUS_WIDTH=32
  b ChangeBigEndian     ;DCD 0xea000007
     ]

     [ ENTRY_BUS_WIDTH=16
  andeq r14,r7,r0,lsl #20   ;DCD 0x0007ea00
     ]

     [ ENTRY_BUS_WIDTH=8
  streq r0,[r0,-r10,ror #1] ;DCD 0x070000ea
     ]
 |
     b ResetHandler
    ]
 b HandlerUndef ;handler for Undefined mode
 b HandlerSWI ;handler for SWI interrupt
 b HandlerPabort ;handler for PAbort
 b HandlerDabort ;handler for DAbort
 b .  ;reserved
 b HandlerIRQ ;handler for IRQ interrupt
 b HandlerFIQ ;handler for FIQ interrupt

;@0x20
 b EnterPWDN ; Must be @0x20.
ChangeBigEndian
;@0x24
 [ ENTRY_BUS_WIDTH=32
     DCD 0xee110f10 ;0xee110f10 => mrc p15,0,r0,c1,c0,0
     DCD 0xe3800080 ;0xe3800080 => orr r0,r0,#0x80;  //Big-endian
     DCD 0xee010f10 ;0xee010f10 => mcr p15,0,r0,c1,c0,0
 ]
 [ ENTRY_BUS_WIDTH=16
     DCD 0x0f10ee11
     DCD 0x0080e380
     DCD 0x0f10ee01
 ]
 [ ENTRY_BUS_WIDTH=8
     DCD 0x100f11ee
     DCD 0x800080e3
     DCD 0x100f01ee
    ]
 DCD 0xffffffff  ;swinv 0xffffff is similar with NOP and run well in both endian mode.
 DCD 0xffffffff
 DCD 0xffffffff
 DCD 0xffffffff
 DCD 0xffffffff
 b ResetHandler

;Function for entering power down mode
; 1. SDRAM should be in self-refresh mode.
; 2. All interrupt should be maksked for SDRAM/DRAM self-refresh.
; 3. LCD controller should be disabled for SDRAM/DRAM self-refresh.
; 4. The I-cache may have to be turned on.
; 5. The location of the following code may have not to be changed.

;void EnterPWDN(int CLKCON);
EnterPWDN
 mov r2,r0  ;r2=rCLKCON
 tst r0,#0x8  ;SLEEP mode?
 bne ENTER_SLEEP

ENTER_STOP
 ldr r0,=REFRESH
 ldr r3,[r0]  ;r3=rREFRESH
 mov r1, r3
 orr r1, r1, #BIT_SELFREFRESH
 str r1, [r0]  ;Enable SDRAM self-refresh

 mov r1,#16   ;wait until self-refresh is issued. may not be needed.
0 subs r1,r1,#1
 bne %B0

 ldr r0,=CLKCON  ;enter STOP mode.
 str r2,[r0]

 mov r1,#32
0 subs r1,r1,#1 ;1) wait until the STOP mode is in effect.
 bne %B0  ;2) Or wait here until the CPU&Peripherals will be turned-off
   ;   Entering SLEEP mode, only the reset by wake-up is available.

 ldr r0,=REFRESH ;exit from SDRAM self refresh mode.
 str r3,[r0]

 MOV_PC_LR

ENTER_SLEEP
 ;NOTE.
 ;1) rGSTATUS3 should have the return address after wake-up from SLEEP mode.

 ldr r0,=REFRESH
 ldr r1,[r0]  ;r1=rREFRESH
 orr r1, r1, #BIT_SELFREFRESH
 str r1, [r0]  ;Enable SDRAM self-refresh

 mov r1,#16   ;Wait until self-refresh is issued,which may not be needed.
0 subs r1,r1,#1
 bne %B0

 ldr r1,=MISCCR
 ldr r0,[r1]
 orr r0,r0,#(7<<17)  ;Set SCLK0=0, SCLK1=0, SCKE=0.
 str r0,[r1]

 ldr r0,=CLKCON  ; Enter sleep mode
 str r2,[r0]

 b .   ;CPU will die here.

WAKEUP_SLEEP
 ;Release SCLKn after wake-up from the SLEEP mode.
 ldr r1,=MISCCR
 ldr r0,[r1]
 bic r0,r0,#(7<<17)  ;SCLK0:0->SCLK, SCLK1:0->SCLK, SCKE:0->=SCKE.
 str r0,[r1]

 ;Set memory control registers
  ldr r0,=SMRDATA
 ldr r1,=BWSCON ;BWSCON Address
 add r2, r0, #52 ;End address of SMRDATA
0
 ldr r3, [r0], #4
 str r3, [r1], #4
 cmp r2, r0
 bne %B0

 mov r1,#256
0 subs r1,r1,#1 ;1) wait until the SelfRefresh is released.
 bne %B0

 ldr r1,=GSTATUS3  ;GSTATUS3 has the start address just after SLEEP wake-up
 ldr r0,[r1]

 mov pc,r0

 LTORG
HandlerFIQ      HANDLER HandleFIQ
HandlerIRQ      HANDLER HandleIRQ
HandlerUndef    HANDLER HandleUndef
HandlerSWI      HANDLER HandleSWI
HandlerDabort   HANDLER HandleDabort
HandlerPabort   HANDLER HandlePabort

IsrIRQ
 sub sp,sp,#4       ;reserved for PC
 stmfd sp!,{r8-r9}

 ldr r9,=INTOFFSET
 ldr r9,[r9]
 ldr r8,=HandleEINT0
 add r8,r8,r9,lsl #2
 ldr r8,[r8]
 str r8,[sp,#8]
 ldmfd sp!,{r8-r9,pc}

;=======
; ENTRY
;=======
ResetHandler
 ldr r0,=WTCON       ;watch dog disable
 ldr r1,=0x0
 str r1,[r0]

 ldr r0,=INTMSK
 ldr r1,=0xffffffff  ;all interrupt disable
 str r1,[r0]

 ldr r0,=INTSUBMSK
 ldr r1,=0x3ff  ;all sub interrupt disable
 str r1,[r0]

 [ {FALSE}
 ; rGPFDAT = (rGPFDAT & ~(0xf<<4)) | ((~data & 0xf)<<4);
 ; Led_Display
 ldr r0,=GPFCON
 ldr r1,=0x5500
 str r1,[r0]
 ldr r0,=GPFDAT
 ldr r1,=0x10
 str r1,[r0]
 ]

 ;To reduce PLL lock time, adjust the LOCKTIME register.
 ldr r0,=LOCKTIME
 ldr r1,=0xffffff
 str r1,[r0]

    [ PLL_ON_START
 ; Added for confirm clock divide. for 2440.
 ; Setting value Fclk:Hclk:Pclk
 ldr r0,=CLKDIVN 
 ldr r1,=CLKDIV_VAL  ; 0=1:1:1, 1=1:1:2, 2=1:2:2, 3=1:2:4, 4=1:4:4, 5=1:4:8, 6=1:3:3, 7=1:3:6.
 str r1,[r0]

 ;Configure UPLL
 ldr r0,=UPLLCON
 ldr r1,=((U_MDIV<<12)+(U_PDIV<<4)+U_SDIV)
 str r1,[r0]
 
 nop ; Caution: After UPLL setting, at least 7-clocks delay must be inserted for setting hardware be completed.
 nop
 nop
 nop
 nop
 nop
 nop
 ;Configure MPLL
 ldr r0,=MPLLCON
 ldr r1,=((M_MDIV<<12)+(M_PDIV<<4)+M_SDIV)
 str r1,[r0]
    ]
 
     ;Check if the boot is caused by the wake-up from SLEEP mode.
 ldr r1,=GSTATUS2
 ldr r0,[r1]
 tst r0,#0x2
 ;In case of the wake-up from SLEEP mode, go to SLEEP_WAKEUP handler.
 bne WAKEUP_SLEEP

 EXPORT StartPointAfterSleepWakeUp
StartPointAfterSleepWakeUp
 
 ;Set memory control registers
  ldr r0,=SMRDATA
 ldr r1,=BWSCON ;BWSCON Address
 add r2, r0, #52 ;End address of SMRDATA

 
0
 ldr r3, [r0], #4
 str r3, [r1], #4
 cmp r2, r0
 bne %B0

   ;Initialize stacks
 bl InitStacks

   ; Setup IRQ handler
 ldr r0,=HandleIRQ       ;This routine is needed
 ldr r1,=IsrIRQ   ;if there isn't 'subs pc,lr,#4' at 0x18, 0x1c
 
 str r1,[r0]

 ;If main() is used, the variable initialization will be done in __main().
    [ :LNOT:USE_MAIN 
     ;Copy and paste RW data/zero initialized data
 LDR     r0, =|Image$$RO$$Limit| ; Get pointer to ROM data
 LDR     r1, =|Image$$RW$$Base|  ; and RAM copy
 LDR     r3, =|Image$$ZI$$Base| 
 
 ;Zero init base => top of initialised data
 CMP     r0, r1      ; Check that they are different
 BEQ     %F2
1      
 CMP     r1, r3      ; Copy init data
 LDRCC   r2, [r0], #4    ;--> LDRCC r2, [r0] + ADD r0, r0, #4        
 STRCC   r2, [r1], #4    ;--> STRCC r2, [r1] + ADD r1, r1, #4
 BCC     %B1
2      
 LDR     r1, =|Image$$ZI$$Limit| ; Top of zero init segment
 MOV     r2, #0
3      
 CMP     r3, r1      ; Zero init
 STRCC   r2, [r3], #4
 BCC     %B3
    ]
    mrs     r0, cpsr
 and     r0, r0, #0x52
 msr     cpsr_c, r0
    
    [ :LNOT:THUMBCODE
     bl Main        ;Don't use main() because ......
     b .                      
    ]

    [ THUMBCODE         ;for start-up code for Thumb mode
     orr lr,pc,#1
     bx lr
     CODE16
     bl Main        ;Don't use main() because ......
     b .
     CODE32
    ]

;function initializing stacks
InitStacks
 ;Don't use DRAM,such as stmfd,ldmfd......
 ;SVCstack is initialized before
 ;Under toolkit ver 2.5, 'msr cpsr,r1' can be used instead of 'msr cpsr_cxsf,r1'
 mrs r0,cpsr
 bic r0,r0,#MODEMASK
 orr r1,r0,#UNDEFMODE|NOINT
 msr cpsr_cxsf,r1  ;UndefMode
 ldr sp,=UndefStack  ; UndefStack=0x33FF_5C00

 orr r1,r0,#ABORTMODE|NOINT
 msr cpsr_cxsf,r1  ;AbortMode
 ldr sp,=AbortStack  ; AbortStack=0x33FF_6000

 orr r1,r0,#IRQMODE|NOINT
 msr cpsr_cxsf,r1  ;IRQMode
 ldr sp,=IRQStack  ; IRQStack=0x33FF_7000

 orr r1,r0,#FIQMODE|NOINT
 msr cpsr_cxsf,r1  ;FIQMode
 ldr sp,=FIQStack  ; FIQStack=0x33FF_8000

 bic r0,r0,#MODEMASK|NOINT
 orr r1,r0,#SVCMODE
 msr cpsr_cxsf,r1  ;SVCMode
 ldr sp,=SVCStack  ; SVCStack=0x33FF_5800

 ;USER mode has not be initialized.
 mov pc,lr
 ;The LR register won't be valid if the current mode is not SVC mode.

 
;=====================================================================
; Clock division test
; Assemble code, because VSYNC time is very short
;=====================================================================
 EXPORT CLKDIV124
 EXPORT CLKDIV144
 
CLKDIV124
 
 ldr     r0, = CLKDIVN
 ldr     r1, = 0x3  ; 0x3 = 1:2:4
 str     r1, [r0]
; wait until clock is stable
 nop
 nop
 nop
 nop
 nop

 ldr     r0, = REFRESH
 ldr     r1, [r0]
 bic  r1, r1, #0xff
 bic  r1, r1, #(0x7<<8)
 orr  r1, r1, #0x470 ; REFCNT135
 str     r1, [r0]
 nop
 nop
 nop
 nop
 nop
 mov     pc, lr

CLKDIV144
 ldr     r0, = CLKDIVN
 ldr     r1, = 0x4  ; 0x4 = 1:4:4
 str     r1, [r0]
; wait until clock is stable
 nop
 nop
 nop
 nop
 nop

 ldr     r0, = REFRESH
 ldr     r1, [r0]
 bic  r1, r1, #0xff
 bic  r1, r1, #(0x7<<8)
 orr  r1, r1, #0x630 ; REFCNT675 - 1520
 str     r1, [r0]
 nop
 nop
 nop
 nop
 nop
 mov     pc, lr

 LTORG

SMRDATA DATA
; Memory configuration should be optimized for best performance
; The following parameter is not optimized.
; Memory access cycle parameter strategy
; 1) The memory settings is  safe parameters even at HCLK=75Mhz.
; 2) SDRAM refresh period is for HCLK<=75Mhz.

 DCD (0+(B1_BWSCON<<4)+(B2_BWSCON<<8)+(B3_BWSCON<<12)+(B4_BWSCON<<16)+(B5_BWSCON<<20)+(B6_BWSCON<<24)+(B7_BWSCON<<28))
 DCD ((B0_Tacs<<13)+(B0_Tcos<<11)+(B0_Tacc<<8)+(B0_Tcoh<<6)+(B0_Tah<<4)+(B0_Tacp<<2)+(B0_PMC))   ;GCS0
 DCD ((B1_Tacs<<13)+(B1_Tcos<<11)+(B1_Tacc<<8)+(B1_Tcoh<<6)+(B1_Tah<<4)+(B1_Tacp<<2)+(B1_PMC))   ;GCS1
 DCD ((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC))   ;GCS2
 DCD ((B3_Tacs<<13)+(B3_Tcos<<11)+(B3_Tacc<<8)+(B3_Tcoh<<6)+(B3_Tah<<4)+(B3_Tacp<<2)+(B3_PMC))   ;GCS3
 DCD ((B4_Tacs<<13)+(B4_Tcos<<11)+(B4_Tacc<<8)+(B4_Tcoh<<6)+(B4_Tah<<4)+(B4_Tacp<<2)+(B4_PMC))   ;GCS4
 DCD ((B5_Tacs<<13)+(B5_Tcos<<11)+(B5_Tacc<<8)+(B5_Tcoh<<6)+(B5_Tah<<4)+(B5_Tacp<<2)+(B5_PMC))   ;GCS5
 DCD ((B6_MT<<15)+(B6_Trcd<<2)+(B6_SCAN))    ;GCS6
 DCD ((B7_MT<<15)+(B7_Trcd<<2)+(B7_SCAN))    ;GCS7
 DCD ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT)

 DCD 0x32     ;SCLK power saving mode, BANKSIZE 128M/128M

 DCD 0x30     ;MRSR6 CL=3clk
 DCD 0x30     ;MRSR7 CL=3clk

 ALIGN

 AREA RamData, DATA, READWRITE

 ^   _ISR_STARTADDRESS  ; _ISR_STARTADDRESS=0x33FF_FF00
HandleReset  #   4
HandleUndef  #   4
HandleSWI  #   4
HandlePabort    #   4
HandleDabort    #   4
HandleReserved  #   4
HandleIRQ  #   4
HandleFIQ  #   4

;Don't use the label 'IntVectorTable',
;The value of IntVectorTable is different with the address you think it may be.
;IntVectorTable
;@0x33FF_FF20
HandleEINT0  #   4
HandleEINT1  #   4
HandleEINT2  #   4
HandleEINT3  #   4
HandleEINT4_7 #   4
HandleEINT8_23 #   4
HandleCAM  #   4  ; Added for 2440.
HandleBATFLT #   4
HandleTICK  #   4
HandleWDT  #   4
HandleTIMER0  #   4
HandleTIMER1  #   4
HandleTIMER2  #   4
HandleTIMER3  #   4
HandleTIMER4  #   4
HandleUART2   #   4
;@0x33FF_FF60
HandleLCD   #   4
HandleDMA0  #   4
HandleDMA1  #   4
HandleDMA2  #   4
HandleDMA3  #   4
HandleMMC  #   4
HandleSPI0  #   4
HandleUART1  #   4
HandleNFCON  #   4  ; Added for 2440.
HandleUSBD  #   4
HandleUSBH  #   4
HandleIIC  #   4
HandleUART0  #   4
HandleSPI1   #   4
HandleRTC   #   4
HandleADC   #   4
;@0x33FF_FFA0
 END

通过楼主的描述，应该还没有到操作系统之上

首先要确定这个中断能否执行——可以在中断内部设置一个断点 来查看。

我觉得中断里——楼上提到的——那两行语句有问题。 那个不是赋值语句吗？

嗯，这是裸机程序。楼上说的赋值语句是写的有问题吗？我是参考书上写的，所以不知道实际工程中是不是符合标准。

请帮忙看下启动程序、CPSR赋值和主程序问题出在哪里了，我现在还不太熟悉这个编程。我的ADS设置的内存入口是0x30000000，这些都是按照手册和书上说明设置的。写一个最简单的输出可以正常执行，但一进中断就不行了。

谢谢大家了！！！

清未决的合理操作不是简单的赋值~

还是把那俩pending寄存器弄明白的好，“等于”不等效“或等”

感受下