cannot loopback
uart_transmitter_test.vhd pass
pass loopback.vhd
pass io_buffer_loopback.vhd
loopback.s runs normally
loopback.s run normally at boud rate 115200
Merge branch 'io_feature' into emak
Merge remote-tracking branch 'origin/developer' into emak
change io specification (see README)
delete some comment outed code
Merge branch 'io_feature' into developer