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Jun 16th, 2021
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  1. .macro wait_for_xmit, port
  2. 1001:
  3. ldrb w17, [\port, #0x14]
  4. and w17, w17, #0x20
  5. cmp w17, #0
  6. beq 1001b
  7. .endm
  8.  
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