99 lines
1.5 KiB
Plaintext
99 lines
1.5 KiB
Plaintext
reset:
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br always >main
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nop
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hardfault:
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reti
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nop
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memfault:
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reti
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nop
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.align
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led_addr: .word 0x000F0000
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number_array0:
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.word 0x03020100
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number_array1:
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.word 0x07060504
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number_array2:
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.word 0x0B0A0908
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number_array3:
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.word 0x0F0E0D0C
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segment_addr0: .word 0x000F00A0
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segment_addr1: .word 0x000F00A4
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random_value: .word 0xAA
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w_cnt_top: .word 0xFFFFFF // for real board
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// w_cnt_top: .word 0x100 //for simulation only
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infamous_pattern0:
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.word 0x0F0E0E0B
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infamous_pattern1:
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.word 0x0D0A0E0D
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main:
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ldr r8, >w_cnt_top
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ldr r0, >led_addr
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// Set LEDs to some value
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ldr r4, >random_value
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st08 r0, r4
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number_loop:
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// First 4
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ldr r4, >number_array0
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ldr r0, >segment_addr0
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st32 r0, r4
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// Second 4
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ldr r4, >number_array1
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ldr r0, >segment_addr1
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st32 r0, r4
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call >wait
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nop
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// First 4
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ldr r4, >number_array2
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ldr r0, >segment_addr0
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st32 r0, r4
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// Second 4
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ldr r4, >number_array3
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ldr r0, >segment_addr1
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st32 r0, r4
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call >wait
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nop
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// 0xDEADBEEF pattern:
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// First 4
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ldr r4, >infamous_pattern0
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ldr r0, >segment_addr0
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st32 r0, r4
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// Second 4
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ldr r4, >infamous_pattern1
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ldr r0, >segment_addr1
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st32 r0, r4
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call >wait
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nop
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br always >number_loop
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nop
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//subroutine to iterate until counter overflow
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wait:
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clr r7 //inititalize inner counter
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inc_i:
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cmp neq r7,r8
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br true >inc_i //if i=cnt_top
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addi r7,1
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ret //else
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nop
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