4 Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
6 This file is part of simavr.
8 simavr is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 simavr is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with simavr. If not, see <http://www.gnu.org/licenses/>.
22 #ifndef __AVR_TIMER_H__
23 #define __AVR_TIMER_H__
40 TIMER_IRQ_OUT_PWM0 = 0,
42 TIMER_IRQ_OUT_COMP, // comparator pins output IRQ
44 TIMER_IRQ_COUNT = TIMER_IRQ_OUT_COMP + AVR_TIMER_COMP_COUNT
47 // Get the internal IRQ corresponding to the INT
48 #define AVR_IOCTL_TIMER_GETIRQ(_name) AVR_IOCTL_DEF('t','m','r',(_name))
50 // Waveform generation modes
52 avr_timer_wgm_none = 0, // invalid mode
56 avr_timer_wgm_fast_pwm,
60 // Compare output modes
62 avr_timer_com_normal = 0,// Normal mode, OCnx disconnected
63 avr_timer_com_toggle, // Toggle OCnx on compare match
64 avr_timer_com_clear, // clear OCnx on compare match
65 avr_timer_com_set, // set OCnx on compare match
70 avr_timer_wgm_reg_constant = 0,
71 avr_timer_wgm_reg_ocra,
72 avr_timer_wgm_reg_icr,
74 typedef struct avr_timer_wgm_t {
75 uint32_t top: 8, bottom: 8, size : 8, kind : 8;
78 #define AVR_TIMER_WGM_NORMAL8() { .kind = avr_timer_wgm_normal, .size=8 }
79 #define AVR_TIMER_WGM_NORMAL16() { .kind = avr_timer_wgm_normal, .size=16 }
80 #define AVR_TIMER_WGM_CTC() { .kind = avr_timer_wgm_ctc, .top = avr_timer_wgm_reg_ocra }
81 #define AVR_TIMER_WGM_ICCTC() { .kind = avr_timer_wgm_ctc, .top = avr_timer_wgm_reg_icr }
82 #define AVR_TIMER_WGM_FASTPWM8() { .kind = avr_timer_wgm_fast_pwm, .size=8 }
83 #define AVR_TIMER_WGM_FASTPWM9() { .kind = avr_timer_wgm_fast_pwm, .size=9 }
84 #define AVR_TIMER_WGM_FASTPWM10() { .kind = avr_timer_wgm_fast_pwm, .size=10 }
85 #define AVR_TIMER_WGM_FCPWM8() { .kind = avr_timer_wgm_fc_pwm, .size=8 }
86 #define AVR_TIMER_WGM_FCPWM9() { .kind = avr_timer_wgm_fc_pwm, .size=9 }
87 #define AVR_TIMER_WGM_FCPWM10() { .kind = avr_timer_wgm_fc_pwm, .size=10 }
88 #define AVR_TIMER_WGM_OCPWM() { .kind = avr_timer_wgm_pwm, .top = avr_timer_wgm_reg_ocra }
89 #define AVR_TIMER_WGM_ICPWM() { .kind = avr_timer_wgm_pwm, .top = avr_timer_wgm_reg_icr }
92 typedef struct avr_timer_t {
96 avr_regbit_t disabled; // bit in the PRR
98 avr_io_addr_t r_tcnt, r_icr;
99 avr_io_addr_t r_tcnth, r_icrh;
102 avr_timer_wgm_t wgm_op[16];
106 avr_regbit_t as2; // asynchronous clock 32khz
107 avr_regbit_t icp; // input capture pin, to link IRQs
108 avr_regbit_t ices; // input capture edge select
111 avr_int_vector_t interrupt; // interrupt vector
112 avr_io_addr_t r_ocr; // comparator register low byte
113 avr_io_addr_t r_ocrh; // comparator register hi byte
114 avr_regbit_t com; // comparator output mode registers
115 avr_regbit_t com_pin; // where comparator output is connected
116 uint64_t comp_cycles;
117 } comp[AVR_TIMER_COMP_COUNT];
119 avr_int_vector_t overflow; // overflow
120 avr_int_vector_t icr; // input capture
122 avr_timer_wgm_t mode;
124 uint64_t tov_base; // when we last were called
125 uint16_t tov_top; // current top value to calculate tnct
128 void avr_timer_init(avr_t * avr, avr_timer_t * port);
134 #endif /*__AVR_TIMER_H__*/