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/*
* Copyright © 2009 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "ao.h"
/*
* Basic I/O functions to support SDCC stdio package
*/
#ifndef USE_SERIAL_0_STDIN
#define USE_SERIAL_0_STDIN 0
#endif
#ifndef USE_SERIAL_1_STDIN
#define USE_SERIAL_1_STDIN 0
#endif
#ifndef USE_SERIAL_2_STDIN
#define USE_SERIAL_2_STDIN 0
#endif
#ifndef USE_SERIAL_3_STDIN
#define USE_SERIAL_3_STDIN 0
#endif
#ifndef USE_SERIAL_4_STDIN
#define USE_SERIAL_4_STDIN 0
#endif
#ifndef USE_SERIAL_5_STDIN
#define USE_SERIAL_5_STDIN 0
#endif
#ifndef USE_SERIAL_6_STDIN
#define USE_SERIAL_6_STDIN 0
#endif
#ifndef USE_SERIAL_7_STDIN
#define USE_SERIAL_7_STDIN 0
#endif
#ifndef USE_SERIAL_8_STDIN
#define USE_SERIAL_8_STDIN 0
#endif
#ifndef USE_SERIAL_9_STDIN
#define USE_SERIAL_9_STDIN 0
#endif
#ifndef PACKET_HAS_SLAVE
#define PACKET_HAS_SLAVE 0
#endif
#define USE_SERIAL_STDIN (USE_SERIAL_0_STDIN + \
USE_SERIAL_1_STDIN + \
USE_SERIAL_2_STDIN + \
USE_SERIAL_3_STDIN + \
USE_SERIAL_4_STDIN + \
USE_SERIAL_5_STDIN + \
USE_SERIAL_6_STDIN + \
USE_SERIAL_7_STDIN + \
USE_SERIAL_8_STDIN + \
USE_SERIAL_9_STDIN)
#define AO_NUM_STDIOS (HAS_USB + PACKET_HAS_SLAVE + USE_SERIAL_STDIN)
__xdata struct ao_stdio ao_stdios[AO_NUM_STDIOS];
#if AO_NUM_STDIOS > 1
__pdata int8_t ao_cur_stdio;
__pdata int8_t ao_num_stdios;
#else
__pdata int8_t ao_cur_stdio;
#define ao_cur_stdio 0
#define ao_num_stdios 0
#endif
void
putchar(char c)
{
#if LOW_LEVEL_DEBUG
if (!ao_cur_task) {
extern void ao_debug_out(char c);
if (c == '\n')
ao_debug_out('\r');
ao_debug_out(c);
return;
}
#endif
if (c == '\n')
(*ao_stdios[ao_cur_stdio].putchar)('\r');
(*ao_stdios[ao_cur_stdio].putchar)(c);
}
void
flush(void)
{
if (ao_stdios[ao_cur_stdio].flush)
ao_stdios[ao_cur_stdio].flush();
}
__xdata uint8_t ao_stdin_ready;
char
getchar(void) __reentrant
{
int c;
int8_t stdio;
ao_arch_block_interrupts();
stdio = ao_cur_stdio;
for (;;) {
c = ao_stdios[stdio]._pollchar();
if (c != AO_READ_AGAIN)
break;
#if AO_NUM_STDIOS > 1
if (++stdio == ao_num_stdios)
stdio = 0;
if (stdio == ao_cur_stdio)
#endif
ao_sleep(&ao_stdin_ready);
}
#if AO_NUM_STDIOS > 1
ao_cur_stdio = stdio;
#endif
ao_arch_release_interrupts();
return c;
}
uint8_t
ao_echo(void)
{
return ao_stdios[ao_cur_stdio].echo;
}
int8_t
ao_add_stdio(int (*_pollchar)(void),
void (*putchar)(char),
void (*flush)(void)) __reentrant
{
#if AO_NUM_STDIOS > 1
if (ao_num_stdios == AO_NUM_STDIOS)
ao_panic(AO_PANIC_STDIO);
#endif
ao_stdios[ao_num_stdios]._pollchar = _pollchar;
ao_stdios[ao_num_stdios].putchar = putchar;
ao_stdios[ao_num_stdios].flush = flush;
ao_stdios[ao_num_stdios].echo = 1;
#if AO_NUM_STDIOS > 1
return ao_num_stdios++;
#else
return 0;
#endif
}
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