altos: Split out arch-specific bits of LCD driver

[fw/altos] / src / cc1111 / ao_lcd_port.c

diff --git a/src/cc1111/ao_lcd_port.c b/src/cc1111/ao_lcd_port.c
new file mode 100644 (file)
index 0000000..324cc3d
--- /dev/null
+++ b/src/cc1111/ao_lcd_port.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright © 2011 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"
+
+void
+ao_lcd_port_put_nibble(uint8_t rs, uint8_t nibble)
+{
+       P0 = (P0 & 0xf0) | (nibble & 0x0f);
+       P1_1 = rs;
+       P1_0 = 1;
+       ao_delay(1);
+       P1_0 = 0;
+       ao_delay(1);
+}
+
+void
+ao_lcd_port_init(void)
+{
+       /* LCD_E and LCD_RS are GPIO outputs */
+       P1DIR |= 0x03;
+       P1SEL &= ~0x03;
+
+       /* LCD D4-D7 are GPIO outputs */
+       P0DIR |= 0x0f;
+       P0SEL &= ~0x0f;
+}