FreeCalypso > hg > freecalypso-tools
view target-utils/loadagent/serextra.S @ 730:6ae3ad8865f4
doc/Host-tools-overview: update for tiffs-8m
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 28 Aug 2020 05:30:01 +0000 |
parents | 3229940734e5 |
children |
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#include "ns16550.h" @ extra serial I/O functions for loadagent binary operations .text .code 32 .globl serial_out_if_empty serial_out_if_empty: ldr r1, =uart_base ldr r2, [r1] ldrb r3, [r2, #NS16550_LSR] tst r3, #NS16550_LSR_THRE strneb r0, [r2, #NS16550_THR] bx lr