22 lines
831 B
NASM
22 lines
831 B
NASM
.include "msp430g2553.inc"
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org 0xC000
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START:
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mov.w #WDTPW|WDTHOLD, &WDTCTL
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mov.b #0x41, &P1DIR ; #01000001b (P1.6 == LED2, P1.0 == LED1)
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mov.w #0x01, R8 ; #00000001b (start on LED1)
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REPEAT:
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mov.b R8, &P1OUT
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xor.b #0x41, R8 ; #00000001b -> #01000000b -> ... (LED0 -> LED1 -> ...)
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mov.w #40000, R9 ; counts to decrement before blink
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mov.w #40000, R10 ; counts to decrement (2nd dec, since 16-bit max value is 65536)
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WAITER1:
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dec R9
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jnz WAITER1 ; R9 not yet 0
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WAITER2:
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dec R10
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jnz waiter2 ; R10 not yet 0
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jmp repeat ; R9, R10 == 0; blink other LED
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org 0xfffe
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dw START ; set reset vector to 'init' label |