summaryrefslogtreecommitdiff
path: root/common/suspend.c
diff options
context:
space:
mode:
Diffstat (limited to 'common/suspend.c')
-rw-r--r--common/suspend.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/common/suspend.c b/common/suspend.c
new file mode 100644
index 0000000000..397e0729a6
--- /dev/null
+++ b/common/suspend.c
@@ -0,0 +1,51 @@
+#include "suspend.h"
+#include "matrix.h"
+#include "action.h"
+
+
+void suspend_power_down(void)
+{
+#ifndef NO_SUSPEND_POWER_DOWN
+ // Enable watchdog to wake from MCU sleep
+ cli();
+ wdt_reset();
+
+ // Watchdog Interrupt and System Reset Mode
+ //wdt_enable(WDTO_1S);
+ //WDTCSR |= _BV(WDIE);
+
+ // Watchdog Interrupt Mode
+ wdt_intr_enable(WDTO_120MS);
+
+ // TODO: more power saving
+ // See PicoPower application note
+ // - I/O port input with pullup
+ // - prescale clock
+ // - BOD disable
+ // - Power Reduction Register PRR
+ // sleep in power down mode
+ set_sleep_mode(SLEEP_MODE_PWR_DOWN);
+ sleep_enable();
+ sei();
+ sleep_cpu();
+ sleep_disable();
+
+ // Disable watchdog after sleep
+ wdt_disable();
+#endif
+}
+
+bool suspend_wakeup_condition(void)
+{
+ matrix_scan();
+ for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
+ if (matrix_get_row(r)) return true;
+ }
+ return false;
+}
+
+void suspend_wakeup_init(void)
+{
+ matrix_init();
+ clear_keyboard();
+}