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; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 #define _cat2(a,b) a##b
22 #define cat2(a,b) _cat2(a,b)
23 #define _cat4(a,b,c,d) a##b##c##d
24 #define cat4(a,b,c,d) _cat4(a,b,c,d)
25 #define _cat8(a,b,c,d,e,f,g,h) a##b##c##d##e##f##g##h
26 #define cat8(a,b,c,d,e,f,g,h) _cat8(a,b,c,d,e,f,g,h)
28 #ifndef AO_LPC_BEEP_TIMER
29 #define AO_LPC_BEEP_TIMER 1
30 #define AO_LPC_BEEP_CHANNEL 1
31 #define AO_LPC_BEEP_PORT 0
32 #define AO_LPC_BEEP_PIN 14
35 #define AO_LPC_CT_BEEP cat2(lpc_ct32b, AO_LPC_BEEP_TIMER)
36 #define AO_LPC_CT_BEEP_CLKCTRL cat2(LPC_SCB_SYSAHBCLKCTRL_CT32B, AO_LPC_BEEP_TIMER)
37 #define AO_LPC_CT_BEEP_EMR cat2(LPC_CT32B_EMR_EMC, AO_LPC_BEEP_CHANNEL)
38 #define AO_LPC_CT_BEEP_MR AO_LPC_BEEP_CHANNEL
39 #define AO_LPC_CT_BEEP_PWMC cat2(LPC_CT32B_PWMC_PWMEN, AO_LPC_BEEP_CHANNEL)
40 #define AO_LPC_CT_BEEP_IOCONF cat4(pio,AO_LPC_BEEP_PORT,_,AO_LPC_BEEP_PIN)
41 #define AO_LPC_CT_BEEP_FUNC cat8(LPC_IOCONF_FUNC_PIO,AO_LPC_BEEP_PORT,_,AO_LPC_BEEP_PIN,_CT32B,AO_LPC_BEEP_TIMER,_MAT,AO_LPC_BEEP_CHANNEL)
47 AO_LPC_CT_BEEP.tcr = ((0 << LPC_CT32B_TCR_CEN) |
48 (1 << LPC_CT32B_TCR_CRST));
49 lpc_scb.sysahbclkctrl &= ~(1UL << AO_LPC_CT_BEEP_CLKCTRL);
51 lpc_scb.sysahbclkctrl |= (1UL << AO_LPC_CT_BEEP_CLKCTRL);
53 /* Set prescaler to match cc1111 clocks
55 AO_LPC_CT_BEEP.pr = AO_LPC_SYSCLK / 750000 - 1;
57 /* Write the desired data in the match registers */
59 /* Reset after two time units */
60 AO_LPC_CT_BEEP.mr[0] = beep << 1;
62 /* PWM width is half of that */
63 AO_LPC_CT_BEEP.mr[AO_LPC_CT_BEEP_MR] = beep;
65 /* Flip output on PWM match */
66 AO_LPC_CT_BEEP.emr = (LPC_CT32B_EMR_EMC_TOGGLE << AO_LPC_CT_BEEP_EMR);
68 /* Reset on match 0 */
69 AO_LPC_CT_BEEP.mcr = (1 << LPC_CT32B_MCR_MR0R);
72 AO_LPC_CT_BEEP.pwmc = (1 << AO_LPC_CT_BEEP_PWMC);
75 AO_LPC_CT_BEEP.ctcr = 0;
77 /* And turn the timer on */
78 AO_LPC_CT_BEEP.tcr = ((1 << LPC_CT32B_TCR_CEN) |
79 (0 << LPC_CT32B_TCR_CRST));
84 ao_beep_for(uint8_t beep, AO_TICK_TYPE ticks)
94 /* Our beeper is on c32b1_mat1
95 * which is on pin pio0_14
98 lpc_ioconf.AO_LPC_CT_BEEP_IOCONF = ((AO_LPC_CT_BEEP_FUNC << LPC_IOCONF_FUNC) |
99 (LPC_IOCONF_MODE_INACTIVE << LPC_IOCONF_MODE) |
100 (0 << LPC_IOCONF_HYS) |
101 (0 << LPC_IOCONF_INV) |
102 (1 << LPC_IOCONF_ADMODE) |
103 (0 << LPC_IOCONF_OD));
105 lpc_scb.sysahbclkctrl |= (1 << AO_LPC_CT_BEEP_CLKCTRL);
107 /* Disable the counter and reset the value */
108 AO_LPC_CT_BEEP.tcr = ((0 << LPC_CT32B_TCR_CEN) |
109 (1 << LPC_CT32B_TCR_CRST));