altos: Add scheme for stm discovery board demo

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 78 insertions, 0 deletions

diff --git a/src/stm-scheme-newlib/ao_scheme_os.h b/src/stm-scheme-newlib/ao_scheme_os.h
new file mode 100644
index 00000000..21b6001a
--- /dev/null
+++ b/src/stm-scheme-newlib/ao_scheme_os.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright © 2016 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.
+ */
+
+#ifndef _AO_SCHEME_OS_H_
+#define _AO_SCHEME_OS_H_
+
+#include "ao.h"
+
+#define AO_SCHEME_POOL		10240
+
+#ifndef __BYTE_ORDER
+#define	__LITTLE_ENDIAN	1234
+#define	__BIG_ENDIAN	4321
+#define __BYTE_ORDER	__LITTLE_ENDIAN
+#endif
+
+static inline int
+ao_scheme_getc() {
+	static uint8_t	at_eol;
+	int c;
+
+	if (at_eol) {
+		ao_cmd_readline();
+		at_eol = 0;
+	}
+	c = ao_cmd_lex();
+	if (c == '\n')
+		at_eol = 1;
+	return c;
+}
+
+static inline void
+ao_scheme_os_flush(void)
+{
+	flush();
+}
+
+static inline void
+ao_scheme_abort(void)
+{
+	ao_panic(1);
+}
+
+static inline void
+ao_scheme_os_led(int led)
+{
+	ao_led_set(led);
+}
+
+#define AO_SCHEME_JIFFIES_PER_SECOND	AO_HERTZ
+
+static inline void
+ao_scheme_os_delay(int delay)
+{
+	ao_delay(delay);
+}
+
+static inline int
+ao_scheme_os_jiffy(void)
+{
+	return ao_tick_count;
+}
+
+#endif