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 961fbb8400e95dab27624b2295075f6a5c6b481e..f1339ee5a543c43d998ce3c5da962489079f6cdb 100644 (file)
--- 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 5b29deaf636ea5e07e6e14e874938d90a6302375..f997f3b55776c87e3d2e93f14d1e1b24f3f88289 100644 (file)
--- 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);