.syntax unified
.global main
.type main, %function

main:
  bl init
  mov r5, 109 @ tick counter
  mov r0, 0xb1e0 @-22000
  mov r6, r0

loop:
  @1. Calculate the next value in the sawtooth signal
  cmp r5, 0
  beq reset


  add r6, 0x193
  mov r0, r6


  @2. bl to BSP_AUDIO_OUT_Play_Sample with that value in r0
  sub r5, 1
  bl BSP_AUDIO_OUT_Play_Sample
  b loop

  reset:
    mov r5, 109
    mov r0, 0xb1e0
    mov r6, r0
  @3. go back to the top of the loop to do it again for the next value
  b loop

  .size main, .-main