19 lines
291 B
ArmAsm
19 lines
291 B
ArmAsm
.section .text
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.globl _start
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.equ UART_DATA, 0
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.equ UART_STATUS, 1
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.equ UART_RX_READY, 0b10
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.equ UART_TX_READY, 0b01
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_start:
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li a0, 0x1000
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loop:
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lbu t0, UART_STATUS(a0)
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andi t0, t0, UART_RX_READY
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beqz t0, loop
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lbu t0, UART_DATA(a0)
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sb t0, UART_DATA(a0)
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j loop
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