PRESERVE8
    AREA LPTMRint,CODE,READONLY
    EXPORT asm_lptmr_irq
    IMPORT my_fprint
LPTMR0_IRQHandler EQU asm_lptmr_irq+1
    EXPORT LPTMR0_IRQHandler
asm_lptmr_irq
    PUSH    {lr}            ; store LR
    LDR     r2,=0x40040000  ; my_LPTMR0_CSR, clear interrupt flag
    LSL     r2,r2, #5
    LDR     r3,=0x42000000  ; ALIASED_base
    ADD     r2,r2,r3
    MOV     r3,#7           ; 7, position bit for TCF
    ADD     r2,r2,r3,LSL #2
    MOV     r1, #0x1
    STR     r1,[r2]         ; clear interrupt flag
; increment the irq count
    LDR     r4, =counter
    LDRB    r0,[r4]
    ADD     r0, r0, #1
    STRB    r0, [r4]
    mov     r3, #10
;print every 10
mod
    udiv    r1, r0, r3
    mov     r3, r1, lsl #3
    add     r1, r3, r1, lsl#1
    cmp     r1, r0
    BLEQ    my_fprint
    POP     {pc}            ; Exit from ISR

stop B stop

    ALIGN 4
    AREA MyData, DATA, READWRITE
counter DCD 0x00

    END