2 * Copyright © 2009 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 * Basic I/O functions to support SDCC stdio package
24 #ifdef SERIAL_STDIN_PORT
25 #define USE_SERIAL_STDIN 1
27 #define USE_SERIAL_STDIN 0
30 #define AO_NUM_STDIOS (HAS_USB + PACKET_HAS_SLAVE + USE_SERIAL_STDIN)
32 __xdata struct ao_stdio ao_stdios[AO_NUM_STDIOS];
33 __pdata int8_t ao_cur_stdio;
34 __pdata int8_t ao_num_stdios;
41 extern void ao_debug_out(char c);
49 (*ao_stdios[ao_cur_stdio].putchar)('\r');
50 (*ao_stdios[ao_cur_stdio].putchar)(c);
56 if (ao_stdios[ao_cur_stdio].flush)
57 ao_stdios[ao_cur_stdio].flush();
60 __xdata uint8_t ao_stdin_ready;
63 getchar(void) __reentrant __critical
66 int8_t stdio = ao_cur_stdio;
69 c = ao_stdios[stdio].pollchar();
70 if (c != AO_READ_AGAIN)
72 if (++stdio == ao_num_stdios)
74 if (stdio == ao_cur_stdio)
75 ao_sleep(&ao_stdin_ready);
84 return ao_stdios[ao_cur_stdio].echo;
88 ao_add_stdio(char (*pollchar)(void),
89 void (*putchar)(char),
90 void (*flush)(void)) __reentrant
92 if (ao_num_stdios == AO_NUM_STDIOS)
93 ao_panic(AO_PANIC_STDIO);
94 ao_stdios[ao_num_stdios].pollchar = pollchar;
95 ao_stdios[ao_num_stdios].putchar = putchar;
96 ao_stdios[ao_num_stdios].flush = flush;
97 ao_stdios[ao_num_stdios].echo = 1;
98 return ao_num_stdios++;