FreeCalypso > hg > freecalypso-sw
view gsm-fw/lldbg/serio.S @ 982:461f7ee5f254
fc-olddump: brown paper bag
author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
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date | Thu, 10 Dec 2015 05:35:42 +0000 |
parents | f5affe83ba2d |
children |
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#include "../include/config.h" #include "ns16550.h" /* this module implements the elementary serial I/O operations */ .text .code 32 .globl lldbg_serial_out lldbg_serial_out: ldr r2, =CONFIG_LLDBG_UART_BASE 1: ldrb r3, [r2, #NS16550_LSR] tst r3, #NS16550_LSR_THRE beq 1b strb r0, [r2, #NS16550_THR] bx lr .globl lldbg_serial_in_poll lldbg_serial_in_poll: ldr r2, =CONFIG_LLDBG_UART_BASE ldrb r3, [r2, #NS16550_LSR] tst r3, #NS16550_LSR_DR ldrneb r0, [r2, #NS16550_RBR] mvneq r0, #0 bx lr #if 0 // not needed currently .globl lldbg_serial_flush lldbg_serial_flush: ldr r2, =CONFIG_LLDBG_UART_BASE 1: ldrb r3, [r2, #NS16550_LSR] tst r3, #NS16550_LSR_TEMP beq 1b bx lr #endif