altos: Add stm-vga demo project

[fw/altos] / src / stm-vga / ao_lisp_os.h

diff --git a/src/stm-vga/ao_lisp_os.h b/src/stm-vga/ao_lisp_os.h
new file mode 100644 (file)
index 0000000..1993ac4
--- /dev/null
+++ b/src/stm-vga/ao_lisp_os.h
@@ -0,0 +1,62 @@
+/*
+ * 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_LISP_OS_H_
+#define _AO_LISP_OS_H_
+
+#include "ao.h"
+
+static inline int
+ao_lisp_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_lisp_os_flush(void)
+{
+       flush();
+}
+
+static inline void
+ao_lisp_abort(void)
+{
+       ao_panic(1);
+}
+
+static inline void
+ao_lisp_os_led(int led)
+{
+       ao_led_set(led);
+}
+
+static inline void
+ao_lisp_os_delay(int delay)
+{
+       ao_delay(AO_MS_TO_TICKS(delay));
+}
+
+#endif