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dose atmel micro hase buge?

Ali Salehi

I'am working with at91sam7x256 and in my program the usart interrupt dosen't work correctly ! I communicatinon with atmel but it isn't fix yet.

thise is my program...pleas help me

www.4shared.com/.../usart16__2_.html

my mail :salehi.elc@gmail.com

Parents
  • 0 in reply to Ali Salehi

    and some important part of our start up:

    
UND_Stack_Size      EQU     0x00000000
SVC_Stack_Size      EQU     0x00000100
ABT_Stack_Size      EQU     0x00000000
FIQ_Stack_Size      EQU     0x00000000
IRQ_Stack_Size      EQU     0x00000080
USR_Stack_Size      EQU     0x00000400


IRQ_Handler
     ldr r14, =AT91C_BASE_AIC
    ; ldr r0, [r14, #AIC_IVR]
     ;bx r0

         ;sub r14, r14, #4
     ;stmfd sp!, {r0-r3, r12, r14}
     ;ldr r14, =AT91C_BASE_AIC
     ;ldr r0, [r14, #AIC_IVR]
     ;bx        r0

        ; ldr r14, =AT91C_BASE_AIC
    ; str r14, [r14, #AIC_EOICR]
    ; ldmfd sp!, {r0-r3, r12, pc}^
      ;Save interrupt context on the stack to allow nesting */
      SUB     lr, lr, #4
      STMFD   sp!, {lr}
      MRS     lr, SPSR
      STMFD   sp!, {r0,r1,lr}

     ; Write in the IVR to support Protect Mode */
      LDR     lr, =AT91C_BASE_AIC
      LDR     r0, [r14, #AIC_IVR]
      STR     lr, [r14, #AIC_IVR]

        ; Branch to interrupt handler in Supervisor mode */
       MSR     CPSR_c, #ARM_MODE_SVC
       STMFD   sp!, {r1-r4, r12, lr}
       MOV     lr, pc
       BX      r0
       LDMIA   sp!, {r1-r4, r12, lr}
       MSR     CPSR_c, #ARM_MODE_IRQ | I_BIT

        ; Acknowledge interrupt */
        LDR     lr, =AT91C_BASE_AIC
        STR     lr, [r14, #AIC_EOICR]

        ; Restore interrupt context and branch back to calling code
        LDMIA   sp!, {r0,r1,lr}
        MSR     SPSR_cxsf, lr
        LDMIA   sp!, {pc}^

; Reset Handler

                EXPORT  Reset_Handler

Reply
  • 0 in reply to Ali Salehi

    and some important part of our start up:

    
UND_Stack_Size      EQU     0x00000000
SVC_Stack_Size      EQU     0x00000100
ABT_Stack_Size      EQU     0x00000000
FIQ_Stack_Size      EQU     0x00000000
IRQ_Stack_Size      EQU     0x00000080
USR_Stack_Size      EQU     0x00000400


IRQ_Handler
     ldr r14, =AT91C_BASE_AIC
    ; ldr r0, [r14, #AIC_IVR]
     ;bx r0

         ;sub r14, r14, #4
     ;stmfd sp!, {r0-r3, r12, r14}
     ;ldr r14, =AT91C_BASE_AIC
     ;ldr r0, [r14, #AIC_IVR]
     ;bx        r0

        ; ldr r14, =AT91C_BASE_AIC
    ; str r14, [r14, #AIC_EOICR]
    ; ldmfd sp!, {r0-r3, r12, pc}^
      ;Save interrupt context on the stack to allow nesting */
      SUB     lr, lr, #4
      STMFD   sp!, {lr}
      MRS     lr, SPSR
      STMFD   sp!, {r0,r1,lr}

     ; Write in the IVR to support Protect Mode */
      LDR     lr, =AT91C_BASE_AIC
      LDR     r0, [r14, #AIC_IVR]
      STR     lr, [r14, #AIC_IVR]

        ; Branch to interrupt handler in Supervisor mode */
       MSR     CPSR_c, #ARM_MODE_SVC
       STMFD   sp!, {r1-r4, r12, lr}
       MOV     lr, pc
       BX      r0
       LDMIA   sp!, {r1-r4, r12, lr}
       MSR     CPSR_c, #ARM_MODE_IRQ | I_BIT

        ; Acknowledge interrupt */
        LDR     lr, =AT91C_BASE_AIC
        STR     lr, [r14, #AIC_EOICR]

        ; Restore interrupt context and branch back to calling code
        LDMIA   sp!, {r0,r1,lr}
        MSR     SPSR_cxsf, lr
        LDMIA   sp!, {pc}^

; Reset Handler

                EXPORT  Reset_Handler

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