firmware: buttons-press and pwrdown rework

[bike-lights.git] / firmware / buttons.c

diff --git a/firmware/buttons.c b/firmware/buttons.c
index 17f4bffad9f70e671994e30582616adb309aaa23..467a09ab84f54f910ebba3adb32007c16beb23c3 100644 (file)
--- a/firmware/buttons.c
+++ b/firmware/buttons.c
@@ -6,8 +6,7 @@
 #include "lights.h"
 
 static uint16_t button_start[N_BUTTONS];
-static unsigned char button_pressed[N_BUTTONS];
-static unsigned char just_waked_up;
+static unsigned char prev_pin;
 
 static unsigned char user_params[MAX_USER_PARAMS] = { 0, 0, 0 };
 static unsigned char user_params_max[MAX_USER_PARAMS] = { 3, 2, 2 };
@@ -21,8 +20,6 @@ static unsigned char user_params_state = 0;
 
 static uint16_t user_params_starttime;
 
-static void do_sleep();
-
 static void toggle_bright_mode()
 {
        // TODO
@@ -75,7 +72,7 @@ static inline void short_press(unsigned char button)
 static inline void long_press(unsigned char button)
 {
        if (button == 0) {
-               do_sleep();
+               power_down();
                return;
        }
 
@@ -96,77 +93,51 @@ void init_buttons()
        DDRA &= ~(_BV(PA3) | _BV(PA4));
        PORTA |=  _BV(PA3) | _BV(PA4);
 
-       for (i=0; i < N_BUTTONS; i++) {
-               button_start[i] = 0;
-               button_pressed[i] = 0;
-       }
-
-       just_waked_up = 1;
+       button_start[0] = 0;
+       button_start[1] = 0;
+       prev_pin = _BV(PA3) | _BV(PA4);
 }
 
-static void do_sleep()
+void timer_check_buttons()
 {
-       log_byte(0xb0);
-       log_flush();
-
-       hw_suspend();
-       gpio_before_poweroff(); // Set the status LED on again
-
-       while((PINA & _BV(PA3)) == 0)
-               ; // wait for button release
+       unsigned char pin = PINA & (_BV(PA3) | _BV(PA4));
 
-       _delay_ms(100);
+       handle_button(0, pin & _BV(PA3), prev_pin & _BV(PA3));
+       handle_button(1, pin & _BV(PA4), prev_pin & _BV(PA4));
 
-       susp_gpio(); // disable the status LED
+       prev_pin = pin;
 
-       power_down();
+       if (jiffies - user_params_starttime > 500) {
+               user_params_state = 0;
+               // set_status_led(0, idle);
+               // set_status_led(1, idle);
+       }
 }
 
-void timer_check_buttons()
+static void handle_button(unsigned char button, unsigned char cur,
+       unsigned char prev)
 {
-       unsigned char pin = PINA;
-       unsigned char i;
-       unsigned char port_states[N_BUTTONS] = {
-               pin & _BV(PA3),
-               pin & _BV(PA4),
-       };
-
-       for (i = 0; i < N_BUTTONS; i++) {
-               if (!port_states[i]) { // is pressed
-                       if (i == 0 && just_waked_up)
-                               continue;
-                       if (button_pressed[i] == 0) {
-                               // begin of button press
-                               button_pressed[i] = 1;
-                               button_start[i] = jiffies;
-#if 0
-                               log_byte(0xC0);
-                               log_word(jiffies);
-#endif
-                       } else if (button_pressed[i] == 1) {
-                               // been already pressed
-                               uint16_t duration = jiffies - button_start[i];
-                               if (duration > 80) {
-                                       // long button press
-                                       button_pressed[i] = 2;
-                                       long_press(i);
-                               }
-                       }
-               } else { // is not pressed
-                       if (i == 0)
-                               just_waked_up = 0;
-                       if (button_pressed[i]) { // just depressed
-                               uint16_t duration = jiffies - button_start[i];
-#if 1
-                               log_byte(0xC1);
-                               log_word(duration);
-                               log_flush();
-#endif
-                               button_pressed[i] = 0;
-                               if (duration > 6 && duration < 30)
-                                       short_press(i);
-                       }
+       // BEWARE: pins are at _zero_ when pressed!
+       if (!cur && prev) {                   // --- just pressed ---
+               button_start[i] = jiffies;
+               // set_status_led(button, 0);
+
+       } else if (!cur && !prev) {           // --- is still pressed ---
+               uint16_t duration = jiffies - button_start[i];
+
+               if (duration > 80) {
+                       // set_status_led(button, 1); // acknowledge long press
+               }
+       } else if (cur && !prev) {            // --- just released ---
+               uint16_t duration = jiffies - button_start[i];
+
+               if (duration > 6 && duration < 30)
+                       short_press(button);
+               } else if (duration > 80) {
+                       // set_status_led(button, 0);
+                       long_press(button);
                }
+               // ignore other button-press durations
        }
 }