微處理器 - STMicroelectronics STM8S103 - Assembly - Timer4


參考資訊：
https://programmer.group/stm8s-timer-basic-interrupt-timing.html

暫存器




main.s

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    .equ PB_ODR,    0x5005
    .equ PB_IDR,    0x5006
    .equ PB_DDR,    0x5007
    .equ PB_CR1,    0x5008
    .equ PB_CR2,    0x5009
    .equ TIM4_CR1,  0x5340
    .equ TIM4_PSCR, 0x5347
    .equ TIM4_ARR,  0x5348
    .equ TIM4_CNTR, 0x5346
    .equ TIM4_IER,  0x5343
    .equ TIM4_SR,   0x5344
 
    .area data
    .area initialized
    cnt: .ds 2
 
    .area sseg
    .area home
    int main
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int 0
    int timer4_handler
 
    .area cseg
main:
    mov PB_DDR, #0x20
    mov PB_CR1, #0x20
    mov TIM4_PSCR, #0x00
    mov TIM4_ARR, #0xff
    mov TIM4_CNTR, #0x00
    mov TIM4_IER, #0x01
    mov TIM4_SR, #0x01
    mov TIM4_CR1, #0x81
    bset PB_ODR, #5
    mov cnt, #0x0000
    rim
loop:
    jp loop
 
timer4_handler:
    mov TIM4_SR, #0
    ldw x, cnt
    incw x
    ldw cnt, x
    cpw x, #1000
    jrne exit
    mov cnt, #0x0000
    bcpl PB_ODR, #5
exit:
    iret

完成