Merge commit 'fdc38ef3f92af7adeeb4de49550d8838c8a39b5c'
[tmk_keyboard.git] / tmk_core / common / avr / suspend.c
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
33 void 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 */
56 static uint8_t wdt_timeout = 0;
57 static 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
83 void suspend_power_down(void)
84 {
85 power_down(WDTO_15MS);
86 }
87
88 __attribute__ ((weak)) void matrix_power_up(void) {}
89 __attribute__ ((weak)) void matrix_power_down(void) {}
90 bool suspend_wakeup_condition(void)
91 {
92 matrix_power_up();
93 matrix_scan();
94 matrix_power_down();
95 for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
96 if (matrix_get_row(r)) return true;
97 }
98 return false;
99 }
100
101 // run immediately after wakeup
102 void suspend_wakeup_init(void)
103 {
104 // clear keyboard state
105 clear_keyboard();
106 #ifdef BACKLIGHT_ENABLE
107 backlight_init();
108 #endif
109 }
110
111 #ifndef NO_SUSPEND_POWER_DOWN
112 /* watchdog timeout */
113 ISR(WDT_vect)
114 {
115 // compensate timer for sleep
116 switch (wdt_timeout) {
117 case WDTO_15MS:
118 timer_count += 15 + 2; // WDTO_15MS + 2(from observation)
119 break;
120 default:
121 ;
122 }
123 }
124 #endif
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