diff options
| author | Keith Packard <keithp@keithp.com> | 2015-08-29 13:20:16 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2015-08-29 13:20:16 -0700 |
| commit | 2839796ca5ace5f0c79643afc1a868893246b621 (patch) | |
| tree | 8d58eb40a70a6af295a40329a3bb1bb0c2637b05 | |
| parent | 368f87918547f89e7eb2a92990621e75e07a3b25 (diff) | |
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>
| -rw-r--r-- | src/drivers/ao_seven_segment.c | 17 | ||||
| -rw-r--r-- | src/drivers/ao_seven_segment.h | 3 |
2 files changed, 15 insertions, 5 deletions
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 @@ -23,6 +23,9 @@ #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); void |