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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; 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_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) __reentrant
{
ao_beep(beep);
ao_delay(ticks);
ao_beep(0);
}
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;
}
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