From: Keith Packard <keithp@keithp.com>
Date: Sat, 29 Aug 2015 20:20:16 +0000 (-0700)
Subject: altos: Provide direct segment driving interface for LCD displays
X-Git-Tag: 1.6.2^2~62^2~2
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=2839796ca5ace5f0c79643afc1a868893246b621

altos: Provide direct segment driving interface for LCD displays

This exposes a simple bit-mask for setting the seven segments instead
of just allowing hex-decimal values.

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

diff --git a/src/drivers/ao_seven_segment.c b/src/drivers/ao_seven_segment.c
index 961fbb84..f1339ee5 100644
--- a/src/drivers/ao_seven_segment.c
+++ b/src/drivers/ao_seven_segment.c
@@ -168,10 +168,20 @@ static const uint8_t ao_segments[] = {
 	(0 << 6),		/* F */
 };
 
+
 void
-ao_seven_segment_set(uint8_t digit, uint8_t value)
+ao_seven_segment_direct(uint8_t digit, uint8_t segments)
 {
 	uint8_t	s;
+
+	for (s = 0; s <= 7; s++)
+		ao_lcd_set(digit, s, !!(segments & (1 << s)));
+	ao_lcd_flush();
+}
+
+void
+ao_seven_segment_set(uint8_t digit, uint8_t value)
+{
 	uint8_t	segments;
 
 	if (value == AO_SEVEN_SEGMENT_CLEAR)
@@ -183,10 +193,7 @@ ao_seven_segment_set(uint8_t digit, uint8_t value)
 		if (value & 0x10)
 			segments |= (1 << 7);
 	}
-
-	for (s = 0; s <= 7; s++)
-		ao_lcd_set(digit, s, !!(segments & (1 << s)));
-	ao_lcd_flush();
+	ao_seven_segment_direct(digit, segments);
 }
 
 void
diff --git a/src/drivers/ao_seven_segment.h b/src/drivers/ao_seven_segment.h
index 5b29deaf..f997f3b5 100644
--- a/src/drivers/ao_seven_segment.h
+++ b/src/drivers/ao_seven_segment.h
@@ -22,6 +22,9 @@
 
 #define AO_SEVEN_SEGMENT_CLEAR		0xff
 
+void
+ao_seven_segment_direct(uint8_t digit, uint8_t segments);
+
 void
 ao_seven_segment_set(uint8_t digit, uint8_t value);