altos: Rename 'core' to 'kernel'

[fw/altos] / src / kernel / ao_stdio.c

diff --git a/src/kernel/ao_stdio.c b/src/kernel/ao_stdio.c
new file mode 100644 (file)
index 0000000..9911813
--- /dev/null
+++ b/src/kernel/ao_stdio.c
@@ -0,0 +1,158 @@
+/*
+ * 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
+}