altos: Provide interface for STM LCD driver.

This provides a simple function interface for driving the LCD segments
in the STM chip. It also uses the update complete interrupt to block
LCD users during flush.

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

1 files changed, 30 insertions, 0 deletions

diff --git a/src/stm/ao_lcd_stm.h b/src/stm/ao_lcd_stm.h
new file mode 100644
index 00000000..14667546
--- /dev/null
+++ b/src/stm/ao_lcd_stm.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright © 2012 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_LCD_STM_H_
+#define _AO_LCD_STM_H_
+
+void
+ao_lcd_set(uint8_t digit, uint8_t segment, uint8_t value);
+
+void
+ao_lcd_clear(void);
+
+void
+ao_lcd_flush(void);
+
+#endif /* _AO_LCD_STM_H_ */