2 * Copyright © 2013 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
24 lpc_ct32b1.tcr = ((0 << LPC_CT32B_TCR_CEN) |
25 (1 << LPC_CT32B_TCR_CRST));
26 lpc_scb.sysahbclkctrl &= ~(1 << LPC_SCB_SYSAHBCLKCTRL_CT32B1);
28 lpc_scb.sysahbclkctrl |= (1 << LPC_SCB_SYSAHBCLKCTRL_CT32B1);
30 /* Set prescaler to match cc1111 clocks
32 lpc_ct32b1.pc = AO_LPC_CLKOUT / 750000 - 1;
34 /* Write the desired data in the match registers */
36 /* Reset after two time units */
37 lpc_ct32b1.mr[0] = beep << 1;
39 /* Flip output after one time unit */
40 lpc_ct32b1.mr[1] = beep;
42 /* Reset on match 0 */
43 lpc_ct32b1.mcr = (1 << LPC_CT32B_MCR_MR0R);
46 lpc_ct32b1.pwmc = (1 << LPC_CT32B_PWMC_PWMEN1);
51 /* And turn the timer on */
52 lpc_ct32b1.tcr = ((1 << LPC_CT32B_TCR_CEN) |
53 (1 << LPC_CT32B_TCR_CRST));
58 ao_beep_for(uint8_t beep, uint16_t ticks) __reentrant
68 /* Our beeper is on c32b1_mat1
69 * which is on pin pio0_14
72 lpc_ioconf.pio0_14 = ((LPC_IOCONF_FUNC_PIO0_14_CT32B1_MAT1 << LPC_IOCONF_FUNC) |
73 (LPC_IOCONF_MODE_INACTIVE << LPC_IOCONF_MODE) |
74 (0 << LPC_IOCONF_HYS) |
75 (0 << LPC_IOCONF_INV) |
76 (0 << LPC_IOCONF_OD));
78 lpc_scb.sysahbclkctrl |= (1 << LPC_SCB_SYSAHBCLKCTRL_CT32B1);
80 /* Disable the counter and reset the value */
81 lpc_ct32b1.tcr = ((0 << LPC_CT32B_TCR_CEN) |
82 (1 << LPC_CT32B_TCR_CRST));