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- use symbolic names

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git-svn-id: http://moon:8086/svn/vhdl/trunk@1631 cc03376c-175c-47c8-b038-4cd826a8556b
This commit is contained in:
jens
2021-04-04 08:58:15 +00:00
parent cbd6a1fa29
commit c22bd92d64
1 changed files with 7 additions and 2 deletions
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lib/CPUs/JCpu/tools/lib/uart.inc.jsm
+7 -2
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@@ -4,6 +4,10 @@
; needs xmem-address definition for ; needs xmem-address definition for
; - uart_status (Status register) ; - uart_status (Status register)
; - uart_data (Data register) ; - uart_data (Data register)
UART_TX_EMPTY equ 0x01
UART_TX_FULL equ 0x02
UART_TX_CMPL equ 0x04
UART_RX_PRESENT equ 0x10
; ------------------------------------------------- ; -------------------------------------------------
; sout ; sout
@@ -11,7 +15,7 @@
; R0 = input ; R0 = input
sout: push R1 sout: push R1
sout1: xin R1, (uart_status) sout1: xin R1, (uart_status)
and R1, 0x02 and R1, UART_TX_FULL
jnz sout1 jnz sout1
xout (uart_data), R0 xout (uart_data), R0
pop R1 pop R1
@@ -23,10 +27,11 @@ sout1: xin R1, (uart_status)
; R0 = output ; R0 = output
sin: push R1 sin: push R1
sin1: xin R1, (uart_status) sin1: xin R1, (uart_status)
and R1, 0x10 and R1, UART_RX_PRESENT
jnz sin1 jnz sin1
xin R0, (uart_data) xin R0, (uart_data)
pop R1 pop R1
ret ret
; ------------------------------------------------- ; -------------------------------------------------