Squashed 'tmk_core/' content from commit 05caacc
[tmk_keyboard.git] / common / avr / suspend.c
CommitLineData
a074364c 1#include <stdbool.h>
2#include <avr/sleep.h>
3#include <avr/wdt.h>
4#include <avr/interrupt.h>
5#include "matrix.h"
6#include "action.h"
7#include "backlight.h"
8#include "suspend_avr.h"
9#include "suspend.h"
10#include "timer.h"
11#ifdef PROTOCOL_LUFA
12#include "lufa.h"
13#endif
14
15
16#define wdt_intr_enable(value) \
17__asm__ __volatile__ ( \
18 "in __tmp_reg__,__SREG__" "\n\t" \
19 "cli" "\n\t" \
20 "wdr" "\n\t" \
21 "sts %0,%1" "\n\t" \
22 "out __SREG__,__tmp_reg__" "\n\t" \
23 "sts %0,%2" "\n\t" \
24 : /* no outputs */ \
25 : "M" (_SFR_MEM_ADDR(_WD_CONTROL_REG)), \
26 "r" (_BV(_WD_CHANGE_BIT) | _BV(WDE)), \
27 "r" ((uint8_t) ((value & 0x08 ? _WD_PS3_MASK : 0x00) | \
28 _BV(WDIE) | (value & 0x07)) ) \
29 : "r0" \
30)
31
32
33void suspend_idle(uint8_t time)
34{
35 cli();
36 set_sleep_mode(SLEEP_MODE_IDLE);
37 sleep_enable();
38 sei();
39 sleep_cpu();
40 sleep_disable();
41}
42
43/* Power down MCU with watchdog timer
44 * wdto: watchdog timer timeout defined in <avr/wdt.h>
45 * WDTO_15MS
46 * WDTO_30MS
47 * WDTO_60MS
48 * WDTO_120MS
49 * WDTO_250MS
50 * WDTO_500MS
51 * WDTO_1S
52 * WDTO_2S
53 * WDTO_4S
54 * WDTO_8S
55 */
56static uint8_t wdt_timeout = 0;
57static void power_down(uint8_t wdto)
58{
59#ifdef PROTOCOL_LUFA
60 if (USB_DeviceState == DEVICE_STATE_Configured) return;
61#endif
62 wdt_timeout = wdto;
63
64 // Watchdog Interrupt Mode
65 wdt_intr_enable(wdto);
66
67 // TODO: more power saving
68 // See PicoPower application note
69 // - I/O port input with pullup
70 // - prescale clock
71 // - BOD disable
72 // - Power Reduction Register PRR
73 set_sleep_mode(SLEEP_MODE_PWR_DOWN);
74 sleep_enable();
75 sei();
76 sleep_cpu();
77 sleep_disable();
78
79 // Disable watchdog after sleep
80 wdt_disable();
81}
82
83void suspend_power_down(void)
84{
85 power_down(WDTO_15MS);
86}
87
88bool suspend_wakeup_condition(void)
89{
90 matrix_power_up();
91 matrix_scan();
92 matrix_power_down();
93 for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
94 if (matrix_get_row(r)) return true;
95 }
96 return false;
97}
98
99// run immediately after wakeup
100void suspend_wakeup_init(void)
101{
102 // clear keyboard state
103 clear_keyboard();
104#ifdef BACKLIGHT_ENABLE
105 backlight_init();
106#endif
107}
108
109#ifndef NO_SUSPEND_POWER_DOWN
110/* watchdog timeout */
111ISR(WDT_vect)
112{
113 // compensate timer for sleep
114 switch (wdt_timeout) {
115 case WDTO_15MS:
116 timer_count += 15 + 2; // WDTO_15MS + 2(from observation)
117 break;
118 default:
119 ;
120 }
121}
122#endif
Imprint / Impressum