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https://opencores.org/ocsvn/eco32/eco32/trunk
Subversion Repositories eco32
[/] [eco32/] [trunk/] [hwtests/] [serial/] [sertest/] [echo1.s] - Rev 39
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; ; echo.s -- test the serial interface ; .set sba,0xF0300010 ; serial base address add $8,$0,sba ; set serial base address L1: ldw $9,$8,0 ; load receiver status into $9 and $9,$9,1 ; check receiver ready beq $9,$0,L1 ; loop while not ready ldw $10,$8,4 ; load receiver data into $10 add $10,$10,0x5C and $10,$10,0xFF L2: ldw $9,$8,8 ; load transmitter status into $9 and $9,$9,1 ; check transmitter ready beq $9,$0,L2 ; loop while not ready stw $10,$8,12 ; load char into transmitter data j L1 ; all over again
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