Matrix power saving
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@ -15,6 +15,8 @@ You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <util/delay.h>
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#include <avr/wdt.h>
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#include "keyboard.h"
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#include "matrix.h"
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#include "keymap.h"
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@ -30,12 +32,14 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "bootmagic.h"
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#include "eeconfig.h"
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#include "backlight.h"
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#include "suspend.h"
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#ifdef MOUSEKEY_ENABLE
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# include "mousekey.h"
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#endif
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#ifdef PS2_MOUSE_ENABLE
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# include "ps2_mouse.h"
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#endif
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#include "lufa.h"
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#ifdef MATRIX_HAS_GHOST
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@ -83,7 +87,25 @@ void keyboard_task(void)
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static uint8_t led_status = 0;
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matrix_row_t matrix_row = 0;
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matrix_row_t matrix_change = 0;
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static uint32_t last_key_time = 0;
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/*
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#define SLEEP_TIME_MS 10000
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// (USB_DeviceState == DEVICE_STATE_Suspended) {
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//if (timer_elapsed32(last_key_time) > SLEEP_TIME_MS) {
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// TODO: remove LUFA dependent code
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if (!USB_IsInitialized && timer_elapsed32(last_key_time) > SLEEP_TIME_MS) {
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matrix_power_down();
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// TODO: power down only when no USB connection
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// Or it makes USB connection lost or suspended
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suspend_power_down(WDTO_15MS);
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matrix_power_up();
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}
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else {
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matrix_power_down();
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matrix_power_up();
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}
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*/
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matrix_scan();
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for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
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matrix_row = matrix_get_row(r);
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@ -105,6 +127,7 @@ void keyboard_task(void)
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});
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// record a processed key
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matrix_prev[r] ^= ((matrix_row_t)1<<c);
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last_key_time = timer_read32();
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// process a key per task call
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goto MATRIX_LOOP_END;
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}
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@ -62,6 +62,9 @@ void keyboard_init(void);
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void keyboard_task(void);
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void keyboard_set_leds(uint8_t leds);
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__attribute__ ((weak)) void matrix_power_up(void) {}
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__attribute__ ((weak)) void matrix_power_down(void) {}
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#ifdef __cplusplus
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}
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#endif
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@ -53,4 +53,9 @@ matrix_row_t matrix_get_row(uint8_t row);
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void matrix_print(void);
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/* power control */
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void matrix_power_up(void);
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void matrix_power_down(void);
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#endif
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@ -43,11 +43,10 @@ static inline void KEY_PREV_ON(void) { (PORTB |= (1<<7)); }
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static inline void KEY_PREV_OFF(void) { (PORTB &= ~(1<<7)); }
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#ifdef HHKB_POWER_SAVING
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static inline void KEY_POWER_ON(void) {
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_delay_ms(10); // TODO: sleep to save power
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DDRB = 0xFF; PORTB = 0x40; // change pins output
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DDRD |= (1<<4); PORTD |= (1<<4); // MOS FET switch on
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/* Without this wait you will miss or get false key events. */
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_delay_ms(1); // wait for powering up
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_delay_ms(5); // wait for powering up
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}
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static inline void KEY_POWER_OFF(void) {
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/* input with pull-up consumes less than without it when pin is open. */
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@ -74,7 +73,7 @@ static inline void KEY_INIT(void)
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KEY_UNABLE();
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KEY_PREV_OFF();
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KEY_POWER_OFF();
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KEY_POWER_ON();
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}
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static inline void KEY_SELECT(uint8_t ROW, uint8_t COL)
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{
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@ -27,8 +27,16 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "timer.h"
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#include "matrix.h"
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#include "hhkb_avr.h"
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#include <avr/wdt.h>
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#include "suspend.h"
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#include "lufa.h"
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// matrix power saving
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#define MATRIX_POWER_SAVE 10000
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static uint32_t matrix_last_modified = 0;
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static bool matrix_power = true;
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// matrix state buffer(1:on, 0:off)
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static matrix_row_t *matrix;
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static matrix_row_t *matrix_prev;
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@ -72,7 +80,7 @@ uint8_t matrix_scan(void)
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matrix_prev = matrix;
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matrix = tmp;
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KEY_POWER_ON();
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matrix_power_up();
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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for (uint8_t col = 0; col < MATRIX_COLS; col++) {
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KEY_SELECT(row, col);
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@ -126,8 +134,9 @@ uint8_t matrix_scan(void)
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// This takes 25us or more to make sure KEY_STATE returns to idle state.
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_delay_us(75);
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}
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if (matrix[row] ^ matrix_prev[row]) matrix_last_modified = timer_read32();
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}
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KEY_POWER_OFF();
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matrix_power_down();
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return 1;
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}
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@ -165,3 +174,18 @@ void matrix_print(void)
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xprintf("%02X: %08b\n", row, bitrev(matrix_get_row(row)));
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}
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}
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void matrix_power_up(void) {
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if (matrix_power) return;
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KEY_POWER_ON();
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matrix_power = true;
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}
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void matrix_power_down(void) {
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if (!matrix_power) return;
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// doesn't power save while USB connection is active
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if (USB_DeviceState == DEVICE_STATE_Configured) return;
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if (timer_elapsed32(matrix_last_modified) <= MATRIX_POWER_SAVE) return;
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KEY_POWER_OFF();
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suspend_power_down(WDTO_15MS);
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matrix_power = false;
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}
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@ -85,7 +85,7 @@ int main(void)
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print("Keyboard start.\n");
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while (1) {
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while (USB_DeviceState == DEVICE_STATE_Suspended) {
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suspend_power_down();
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suspend_power_down(WDTO_120MS);
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if (USB_Device_RemoteWakeupEnabled && suspend_wakeup_condition()) {
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USB_Device_SendRemoteWakeup();
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}
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