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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 | ||
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 | bool 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 | |
100 | void 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 */ | |
111 | ISR(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 |