altos: Seven segment display driver

Hex numbers and the decimal point.

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

diff --git a/src/drivers/ao_seven_segment.c b/src/drivers/ao_seven_segment.c
new file mode 100644 (file)
index 0000000..1a643ef
--- /dev/null
+++ b/src/drivers/ao_seven_segment.c
@@ -0,0 +1,216 @@
+/*
+ * 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.
+ */
+
+#include <ao.h>
+#include <ao_seven_segment.h>
+#include <ao_lcd_stm.h>
+
+/*
+ *         0
+ *     -------
+ *     |       |  
+ *   1 |       | 2
+ *     |   3   |
+ *      -------
+ *     |       |
+ *   4 |       | 5
+ *     |   6   |
+ *      -------
+ *              [] 7
+ *
+ */
+
+static const uint8_t ao_segments[] = {
+       (1 << AO_SEGMENT_0) |
+       (1 << AO_SEGMENT_1) |
+       (1 << AO_SEGMENT_2) |
+       (0 << AO_SEGMENT_3) |
+       (1 << AO_SEGMENT_4) |
+       (1 << AO_SEGMENT_5) |
+       (1 << AO_SEGMENT_6),            /* 0 */
+
+       (0 << AO_SEGMENT_0) |
+       (0 << AO_SEGMENT_1) |
+       (1 << AO_SEGMENT_2) |
+       (0 << AO_SEGMENT_3) |
+       (0 << AO_SEGMENT_4) |
+       (1 << AO_SEGMENT_5) |
+       (0 << AO_SEGMENT_6),            /* 1 */
+
+       (1 << AO_SEGMENT_0) |
+       (0 << AO_SEGMENT_1) |
+       (1 << AO_SEGMENT_2) |
+       (1 << AO_SEGMENT_3) |
+       (1 << AO_SEGMENT_4) |
+       (0 << AO_SEGMENT_5) |
+       (1 << AO_SEGMENT_6),            /* 2 */
+
+       (1 << AO_SEGMENT_0) |
+       (0 << AO_SEGMENT_1) |
+       (1 << AO_SEGMENT_2) |
+       (1 << AO_SEGMENT_3) |
+       (0 << AO_SEGMENT_4) |
+       (1 << AO_SEGMENT_5) |
+       (1 << AO_SEGMENT_6),            /* 3 */
+
+       (0 << AO_SEGMENT_0) |
+       (1 << AO_SEGMENT_1) |
+       (1 << AO_SEGMENT_2) |
+       (1 << AO_SEGMENT_3) |
+       (0 << AO_SEGMENT_4) |
+       (1 << AO_SEGMENT_5) |
+       (0 << AO_SEGMENT_6),            /* 4 */
+
+       (1 << AO_SEGMENT_0) |
+       (1 << AO_SEGMENT_1) |
+       (0 << AO_SEGMENT_2) |
+       (1 << AO_SEGMENT_3) |
+       (0 << AO_SEGMENT_4) |
+       (1 << AO_SEGMENT_5) |
+       (1 << AO_SEGMENT_6),            /* 5 */
+
+       (1 << AO_SEGMENT_0) |
+       (1 << AO_SEGMENT_1) |
+       (0 << AO_SEGMENT_2) |
+       (1 << AO_SEGMENT_3) |
+       (1 << AO_SEGMENT_4) |
+       (1 << AO_SEGMENT_5) |
+       (1 << AO_SEGMENT_6),            /* 6 */
+
+       (1 << AO_SEGMENT_0) |
+       (0 << AO_SEGMENT_1) |
+       (1 << AO_SEGMENT_2) |
+       (0 << AO_SEGMENT_3) |
+       (0 << AO_SEGMENT_4) |
+       (1 << AO_SEGMENT_5) |
+       (0 << AO_SEGMENT_6),            /* 7 */
+
+       (1 << AO_SEGMENT_0) |
+       (1 << AO_SEGMENT_1) |
+       (1 << AO_SEGMENT_2) |
+       (1 << AO_SEGMENT_3) |
+       (1 << AO_SEGMENT_4) |
+       (1 << AO_SEGMENT_5) |
+       (1 << AO_SEGMENT_6),            /* 8 */
+
+       (1 << AO_SEGMENT_0) |
+       (1 << AO_SEGMENT_1) |
+       (1 << AO_SEGMENT_2) |
+       (1 << AO_SEGMENT_3) |
+       (0 << AO_SEGMENT_4) |
+       (1 << AO_SEGMENT_5) |
+       (1 << AO_SEGMENT_6),            /* 9 */
+
+       (1 << AO_SEGMENT_0) |
+       (1 << AO_SEGMENT_1) |
+       (1 << AO_SEGMENT_2) |
+       (1 << AO_SEGMENT_3) |
+       (1 << AO_SEGMENT_4) |
+       (1 << AO_SEGMENT_5) |
+       (0 << AO_SEGMENT_6),            /* A */
+
+       (0 << AO_SEGMENT_0) |
+       (1 << AO_SEGMENT_1) |
+       (0 << AO_SEGMENT_2) |
+       (1 << AO_SEGMENT_3) |
+       (1 << AO_SEGMENT_4) |
+       (1 << AO_SEGMENT_5) |
+       (1 << AO_SEGMENT_6),            /* b */
+
+       (1 << AO_SEGMENT_0) |
+       (1 << AO_SEGMENT_1) |
+       (0 << AO_SEGMENT_2) |
+       (0 << AO_SEGMENT_3) |
+       (1 << AO_SEGMENT_4) |
+       (0 << AO_SEGMENT_5) |
+       (1 << AO_SEGMENT_6),            /* c */
+
+       (0 << AO_SEGMENT_0) |
+       (0 << AO_SEGMENT_1) |
+       (1 << AO_SEGMENT_2) |
+       (1 << AO_SEGMENT_3) |
+       (1 << AO_SEGMENT_4) |
+       (1 << AO_SEGMENT_5) |
+       (1 << AO_SEGMENT_6),            /* d */
+
+       (1 << AO_SEGMENT_0) |
+       (1 << AO_SEGMENT_1) |
+       (0 << AO_SEGMENT_2) |
+       (1 << AO_SEGMENT_3) |
+       (1 << AO_SEGMENT_4) |
+       (0 << AO_SEGMENT_5) |
+       (1 << AO_SEGMENT_6),            /* E */
+
+       (1 << AO_SEGMENT_0) |
+       (1 << AO_SEGMENT_1) |
+       (0 << AO_SEGMENT_2) |
+       (1 << AO_SEGMENT_3) |
+       (1 << AO_SEGMENT_4) |
+       (0 << AO_SEGMENT_5) |
+       (0 << AO_SEGMENT_6),            /* F */
+};
+
+void
+ao_seven_segment_set(uint8_t digit, uint8_t value)
+{
+       uint8_t s;
+       uint8_t segments;
+
+       if (value == AO_SEVEN_SEGMENT_CLEAR)
+               segments = 0;
+       else {
+               segments = ao_segments[value & 0xf];
+
+               /* Check for decimal point */
+               if (value & 0x10)
+                       segments |= (1 << AO_SEGMENT_7);
+       }
+
+       for (s = 0; s <= 7; s++)
+               ao_lcd_set(digit, s, !!(segments & (1 << s)));
+       ao_lcd_flush();
+}
+
+void
+ao_seven_segment_clear(void)
+{
+       ao_lcd_clear();
+}
+
+
+static void
+ao_seven_segment_show(void)
+{
+       uint8_t digit, value;
+       ao_cmd_decimal();
+       digit = ao_cmd_lex_i;
+       ao_cmd_decimal();
+       value = ao_cmd_lex_i;
+       ao_seven_segment_set(digit, value);
+}
+
+
+static const struct ao_cmds ao_seven_segment_cmds[] = {
+       { ao_seven_segment_show,        "S <digit> <value>\0Set LCD digit" },
+       { 0, NULL },
+};
+
+void
+ao_seven_segment_init(void)
+{
+       ao_cmd_register(ao_seven_segment_cmds);
+}

diff --git a/src/drivers/ao_seven_segment.h b/src/drivers/ao_seven_segment.h
new file mode 100644 (file)
index 0000000..5b29dea
--- /dev/null
+++ b/src/drivers/ao_seven_segment.h
@@ -0,0 +1,34 @@
+/*
+ * 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_SEVEN_SEGMENT_H_
+#define _AO_SEVEN_SEGMENT_H_
+
+#define AO_SEVEN_SEGMENT_DECIMAL       0x10
+
+#define AO_SEVEN_SEGMENT_CLEAR         0xff
+
+void
+ao_seven_segment_set(uint8_t digit, uint8_t value);
+
+void
+ao_seven_segment_clear(void);
+
+void
+ao_seven_segment_init(void);
+
+#endif /* _AO_SEVEN_SEGMENT_H_ */