.define UART_RECV_NEW, 0x2
u_recv_byte:
+#ifndef DTSIM
ldw r3, UART_STATUS(r10)
andx r3, UART_RECV_NEW
brzs+ u_recv_byte; branch if zero
xor r0, r0, r0
ldw r0, UART_RECV(r10)
+#else
+ ldis r0, 0x41 ; 'A'
+#endif
ret
u_send_byte:
+#ifndef DTSIM
ldw r9, UART_STATUS(r10)
andx r9, UART_TRANS_EMPTY
brnz+ u_send_byte ; branch if not zero
stb r1, UART_TRANS(r10)
+#endif
ret
u_send_uint:
+#ifndef DTSIM
addi r8, r1, 0
;usb_sendbuffersafe ("0x", 2);
xor r1, r1, r1
lls r8, r8, 4
addi r7, r7, 1
br u_send_uint_loop
+#else
+ ret
+#endif
u_send_string:
+#ifndef DTSIM
; r1 = addr
; r2 = len
addi r3, r1, 0
addis r2, r2, 0-1
addi r3, r3, 1
br u_send_string_int
+#else
+ ret
+#endif
u_send_newline:
+#ifndef DTSIM
xor r1, r1, r1
ldi r1, 0x0a
call u_send_byte
ldi r1, 0x0d
call u_send_byte
+#endif
ret
u_init:
+#ifndef DTSIM
xor r10, r10, r10
ldi r10, UART_BASE@lo
ldih r10, UART_BASE@hi
+#endif
ret