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/>.
36 TIMER_IRQ_OUT_PWM0 = 0,
38 TIMER_IRQ_OUT_COMP, // comparator pins output IRQ
40 TIMER_IRQ_COUNT = TIMER_IRQ_OUT_COMP + AVR_TIMER_COMP_COUNT
43 // Get the internal IRQ corresponding to the INT
44 #define AVR_IOCTL_TIMER_GETIRQ(_name) AVR_IOCTL_DEF('t','m','r',(_name))
46 // Waweform generation modes
48 avr_timer_wgm_none = 0, // invalid mode
52 avr_timer_wgm_fast_pwm,
55 // Compare output modes
57 avr_timer_com_normal = 0,// Normal mode, OCnx disconnected
58 avr_timer_com_toggle, // Toggle OCnx on compare match
59 avr_timer_com_clear, // clear OCnx on compare match
60 avr_timer_com_set, // set OCnx on compare match
65 avr_timer_wgm_reg_constant = 0,
66 avr_timer_wgm_reg_ocra,
67 avr_timer_wgm_reg_icr,
69 typedef struct avr_timer_wgm_t {
70 uint32_t top: 8, bottom: 8, size : 8, kind : 8;
73 #define AVR_TIMER_WGM_NORMAL8() { .kind = avr_timer_wgm_normal, .size=8 }
74 #define AVR_TIMER_WGM_NORMAL16() { .kind = avr_timer_wgm_normal, .size=16 }
75 #define AVR_TIMER_WGM_CTC() { .kind = avr_timer_wgm_ctc, .top = avr_timer_wgm_reg_ocra }
76 #define AVR_TIMER_WGM_ICCTC() { .kind = avr_timer_wgm_ctc, .top = avr_timer_wgm_reg_icr }
77 #define AVR_TIMER_WGM_FASTPWM8() { .kind = avr_timer_wgm_fast_pwm, .size=8 }
78 #define AVR_TIMER_WGM_FASTPWM9() { .kind = avr_timer_wgm_fast_pwm, .size=9 }
79 #define AVR_TIMER_WGM_FASTPWM10() { .kind = avr_timer_wgm_fast_pwm, .size=10 }
80 #define AVR_TIMER_WGM_OCPWM() { .kind = avr_timer_wgm_pwm, .top = avr_timer_wgm_reg_ocra }
81 #define AVR_TIMER_WGM_ICPWM() { .kind = avr_timer_wgm_pwm, .top = avr_timer_wgm_reg_icr }
84 typedef struct avr_timer_t {
87 avr_regbit_t disabled; // bit in the PRR
89 avr_io_addr_t r_tcnt, r_icr;
90 avr_io_addr_t r_tcnth, r_icrh;
93 avr_timer_wgm_t wgm_op[16];
97 avr_regbit_t as2; // asynchronous clock 32khz
98 avr_regbit_t icp; // input capture pin, to link IRQs
99 avr_regbit_t ices; // input capture edge select
102 avr_int_vector_t interrupt; // interrupt vector
103 avr_io_addr_t r_ocr; // comparator register low byte
104 avr_io_addr_t r_ocrh; // comparator register hi byte
105 avr_regbit_t com; // comparator output mode registers
106 avr_regbit_t com_pin; // where comparator output is connected
107 uint64_t comp_cycles;
108 } comp[AVR_TIMER_COMP_COUNT];
110 avr_int_vector_t overflow; // overflow
111 avr_int_vector_t icr; // input capture
113 avr_timer_wgm_t mode;
115 uint64_t tov_base; // we we last were called
116 uint16_t tov_top; // current top value to calculate tnct
119 void avr_timer_init(avr_t * avr, avr_timer_t * port);
121 #endif /* AVR_TIMER_H_ */