X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=ao_beep.c;fp=ao_beep.c;h=ae5e36a6249cf4470edf0b7e9f24876b1ca7195c;hp=0000000000000000000000000000000000000000;hb=f3f25a1cec7d2a034aa544569cfd23bea1a996c5;hpb=e14f07bfdb8824fc7ed6df1129c66ee39ffd6d54

diff --git a/ao_beep.c b/ao_beep.c
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index 00000000..ae5e36a6
--- /dev/null
+++ b/ao_beep.c
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+/*
+ * Copyright © 2009 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; 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 "ao.h"
+
+void
+ao_beep_init(void)
+{
+	/* Our beeper is on P2_0, which is hooked to timer 4 using
+	 * configuration alternative 2
+	 */
+	P2_0 = 0;
+	P2SEL = (P2SEL & ~P2SEL_SELP2_0_MASK) | P2SEL_SELP2_0_GPIO;
+	PERCFG = (PERCFG & ~PERCFG_T4CFG_ALT_MASK) | PERCFG_T4CFG_ALT_2;
+	T4CCTL0 = TxCCTLy_CMP_TOGGLE|TxCCTLy_CMP_MODE_ENABLE;
+}
+
+void
+ao_beep(uint8_t beep)
+{
+	if (beep == 0) {
+		P2_0 = 0;
+		P2SEL = (P2SEL & ~P2SEL_SELP2_0_MASK) | P2SEL_SELP2_0_GPIO;
+		T4CTL = 0;
+	} else {
+		P2SEL = (P2SEL & ~P2SEL_SELP2_0_MASK) | P2SEL_SELP2_0_PERIPHERAL;
+		T4CC0 = beep;
+		T4CTL = TxCTL_DIV_32 | TxCTL_MODE_MODULO | TxCTL_START;
+	}
+}
+
+void
+ao_beep_for(uint8_t beep, uint16_t ticks)
+{
+	ao_beep(beep);
+	ao_delay(ticks);
+	ao_beep(0);
+}