amiga_boottest
view src/serial.h @ 4:995d42b33974
serial output
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Fri, 23 Feb 2018 13:29:37 +0200 |
| parents | |
| children |
line source
1 #ifndef SERIAL_H_
2 #define SERIAL_H_
4 #include "hwregs.h"
6 /* dff030 is REG_SERDAT
7 * dff018 is REG_SERDATR
8 * bit 13 of SERDATR is TBE (transmit buffer empty)
9 */
10 #define ser_putchar(c) \
11 asm volatile( \
12 "or.w #0x100, %0\n\t" \
13 "0: btst #13, 0xdff018\n\t" \
14 "beq 0b\n\t" \
15 "move.w %0, 0xdff030\n\t" \
16 :: "d"((int16_t)c))
18 void ser_init(int baud);
19 void ser_print(const char *s);
21 #endif /* SERIAL_H_ */