summaryrefslogtreecommitdiff
path: root/digital/dev2/src/common/select.c
diff options
context:
space:
mode:
authorNicolas Schodet2009-04-10 01:16:50 +0200
committerNicolas Schodet2009-04-10 01:16:50 +0200
commit72ed993e982d1a2484ef9d54d93757f2f9094547 (patch)
tree440c2b1ddbbca4a36c686b3f3e20f8dd6a2a85c3 /digital/dev2/src/common/select.c
parentefdeb17f51de00aade6ea3ec4d3ddf1404d56855 (diff)
* digital/dev2:
- added usb_serial_isp, no isp yet.
Diffstat (limited to 'digital/dev2/src/common/select.c')
-rw-r--r--digital/dev2/src/common/select.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/digital/dev2/src/common/select.c b/digital/dev2/src/common/select.c
new file mode 100644
index 00000000..d4e7bb30
--- /dev/null
+++ b/digital/dev2/src/common/select.c
@@ -0,0 +1,66 @@
+/* select.c - Output selection mechanism. */
+/* dev2 - Multi-purpose development board using USB and Ethernet. {{{
+ *
+ * Copyright (C) 2009 Nicolas Schodet
+ *
+ * APBTeam:
+ * Web: http://apbteam.org/
+ * Email: team AT apbteam DOT org
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 "common.h"
+
+#include "io.h"
+
+#include "select.h"
+
+#define ENABLE _BV (2)
+#define SELA _BV (5)
+#define SELB _BV (4)
+
+/* Initialise selector. */
+void
+select_init (void)
+{
+ PORTC &= ~(ENABLE | SELA | SELB);
+ DDRC |= ENABLE | SELA | SELB;
+}
+
+/* Select an output (1-4) or switch off (0, anything else). */
+void
+select_out (uint8_t num)
+{
+ uint8_t p = PORTC & ~(ENABLE | SELA | SELB);
+ switch (num)
+ {
+ case 1:
+ PORTC = p | ENABLE;
+ break;
+ case 2:
+ PORTC = p | ENABLE | SELA;
+ break;
+ case 3:
+ PORTC = p | ENABLE | SELB;
+ break;
+ case 4:
+ PORTC = p | ENABLE | SELA | SELB;
+ break;
+ default:
+ PORTC = p;
+ break;
+ }
+}