Initial support for iriver backlight dimming. Unfortunately dimming
remote control's EL-backlight is not possible. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6747 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Miika Pekkarinen
parent
b0287720b1
commit
2bfd2585a9
2 changed files with 217 additions and 3 deletions
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@ -59,6 +59,218 @@ static int remote_backlight_timer;
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static unsigned int remote_backlight_timeout = 5;
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#endif
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#if CONFIG_BACKLIGHT == BL_IRIVER
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#define BL_PWM_COUNT 100
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/* Cycle interval in ms */
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#define BL_PWM_INTERVAL 5000
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#define BL_PWM_INTERVAL_IDLE 500000
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#define BL_DIM_SPEED 4
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#define __backlight_on __backlight_fade_in
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#define __backlight_off __backlight_fade_out
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#define DIM_STATE_START 0
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#define DIM_STATE_MAIN 1
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#define DIM_STATE_REMOTE 2
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static bool bl_timer_active = false;
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static int bl_dim_current = BL_PWM_COUNT;
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static int bl_dim_target = BL_PWM_COUNT;
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static int bl_pwm_counter = 0;
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static volatile int bl_cycle_counter = 0;
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/* Unfortunately we can't dim H1xx remote lcd :/ */
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#ifdef HAVE_REMOTE_LCD_DIMMABLE
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#define lcd_remote_backlight_on __backlight_fade_remote_in
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#define lcd_remote_backlight_off __backlight_fade_remote_out
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static int bl_dim_remote_current = BL_PWM_COUNT;
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static int bl_dim_remote_target = BL_PWM_COUNT;
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static int bl_pwm_remote_counter = 0;
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static bool bl_dim_next_interval;
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#endif
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static int bl_dim_state = 0;
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void backlight_start_timer(void)
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{
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unsigned int count;
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if (bl_timer_active)
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return ;
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count = 1;
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bl_timer_active = true;
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/* We are using timer 1 */
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TRR1 = count; /* The reference count */
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TCN1 = 0; /* reset the timer */
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TMR1 = 0x011d; /* prescaler=2, restart, CLK/16, enabled */
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TER1 = 0xff; /* Clear all events */
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/* ICR2 (Timer2) */
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ICR0 = (ICR0 & 0xffff00ff) | 0x00009000; /* Interrupt on level 4.0 */
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IMR &= ~(1<<10);
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}
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void TIMER1(void) __attribute__ ((interrupt_handler));
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void TIMER1(void)
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{
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int timer_period;
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#ifdef HAVE_REMOTE_LCD_DIMMABLE
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int new_timer_period;
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#endif
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timer_period = FREQ/20000 * BL_PWM_INTERVAL / 100 / 32;
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switch (bl_dim_state) {
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/* New cycle */
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case DIM_STATE_START:
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bl_pwm_counter = 0;
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bl_cycle_counter++;
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if (bl_dim_current > 0 && bl_dim_current < BL_PWM_COUNT) {
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GPIO1_OUT &= ~0x00020000;
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bl_pwm_counter = bl_dim_current;
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timer_period = timer_period * bl_pwm_counter / BL_PWM_COUNT;
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bl_dim_state = DIM_STATE_MAIN;
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} else {
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if (bl_dim_current)
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GPIO1_OUT &= ~0x00020000;
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else
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GPIO1_OUT |= 0x00020000;
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}
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#ifdef HAVE_REMOTE_LCD_DIMMABLE
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bl_dim_next_interval = 0;
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bl_pwm_remote_counter = 0;
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if (bl_dim_remote_current > 0 &&
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bl_dim_remote_current < BL_PWM_COUNT) {
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GPIO_OUT &= ~0x00000800;
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bl_pwm_remote_counter = bl_dim_remote_current;
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if (bl_dim_state == DIM_STATE_START) {
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timer_period = timer_period * bl_pwm_remote_counter
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/ BL_PWM_COUNT;
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bl_dim_state = DIM_STATE_REMOTE;
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break ;
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}
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new_timer_period = timer_period * bl_pwm_remote_counter
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/ BL_PWM_COUNT;
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if (new_timer_period < timer_period) {
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bl_dim_next_interval = timer_period - new_timer_period;
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timer_period = new_timer_period;
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bl_dim_state = DIM_STATE_REMOTE;
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} else {
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bl_dim_next_interval = new_timer_period - timer_period;
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}
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} else {
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if (bl_dim_remote_current)
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GPIO_OUT &= ~0x00000800;
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else
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GPIO_OUT |= 0x00000800;
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}
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#endif
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break ;
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/* Dim main screen */
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case DIM_STATE_MAIN:
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GPIO1_OUT |= 0x00020000;
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#ifdef HAVE_REMOTE_LCD_DIMMABLE
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if (bl_dim_next_interval) {
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timer_period = bl_dim_next_interval;
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bl_dim_next_interval = 0;
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bl_dim_state = DIM_STATE_REMOTE;
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break ;
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}
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#endif
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bl_dim_state = DIM_STATE_START;
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timer_period = timer_period * (BL_PWM_COUNT - bl_pwm_counter) / BL_PWM_COUNT;
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break ;
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#ifdef HAVE_REMOTE_LCD_DIMMABLE
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/* Dim remote lcd */
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case DIM_STATE_REMOTE:
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GPIO_OUT |= 0x00000800;
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if (bl_dim_next_interval) {
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timer_period = bl_dim_next_interval;
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bl_dim_next_interval = 0;
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bl_dim_state = DIM_STATE_MAIN;
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break ;
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}
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bl_dim_state = DIM_STATE_START;
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timer_period = timer_period * (BL_PWM_COUNT - bl_pwm_remote_counter) / BL_PWM_COUNT;
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break ;
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#endif
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}
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if (bl_cycle_counter >= BL_DIM_SPEED) {
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bool idle = true;
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if (bl_dim_target > bl_dim_current) {
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bl_dim_current++;
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idle = false;
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}
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else if (bl_dim_target < bl_dim_current) {
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bl_dim_current--;
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idle = false;
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}
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#ifdef HAVE_REMOTE_LCD_DIMMABLE
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if (bl_dim_remote_target > bl_dim_remote_current) {
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bl_dim_remote_current++;
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idle = false;
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}
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else if (bl_dim_remote_target < bl_dim_remote_current) {
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bl_dim_remote_current--;
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idle = false;
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}
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#endif
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bl_cycle_counter = 0;
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/* Save CPU & battery when idle, stop timer */
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if (idle) {
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bl_timer_active = false;
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TMR1 = 0;
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}
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}
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TRR1 = timer_period;
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TCN1 = 0;
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TER1 = 0xff; /* Clear all events */
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}
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static void __backlight_dim(int value)
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{
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bl_dim_target = value;
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backlight_start_timer();
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}
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static void __backlight_fade_in(void)
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{
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__backlight_dim(BL_PWM_COUNT);
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}
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static void __backlight_fade_out(void)
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{
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__backlight_dim(0);
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}
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#ifdef HAVE_REMOTE_LCD_DIMMABLE
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static void __backlight_dim_remote(int value)
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{
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bl_dim_remote_target = value;
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}
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static void __backlight_fade_remote_in(void)
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{
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__backlight_dim_remote(BL_PWM_COUNT);
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}
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static void __backlight_fade_remote_out(void)
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{
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__backlight_dim_remote(0);
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}
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#endif
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#else
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static void __backlight_off(void)
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{
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#if CONFIG_BACKLIGHT == BL_IRIVER
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@ -91,6 +303,7 @@ static void __backlight_on(void)
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P1 |= 0x10;
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#endif
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}
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#endif
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void backlight_thread(void)
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{
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@ -432,12 +432,13 @@ void (* const vbr[]) (void) __attribute__ ((section (".vectors"))) =
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UIE,UIE,UIE,UIE,UIE,UIE,
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UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,
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UIE,UIE,UIE,UIE,UIE,UIE,UIE,UIE,
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UIE,UIE,UIE,TIMER0,UIE,UIE,UIE,UIE,
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UIE,UIE,UIE,TIMER0,TIMER1,UIE,UIE,UIE,
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/* lvl 3 lvl 4 */
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TRAP0,TRAP1,TRAP2,TRAP3,TRAP4,TRAP5,TRAP6,TRAP7,
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TRAP8,TRAP9,TRAP10,TRAP11,TRAP12,TRAP13,TRAP14,TRAP15,
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SWT,UIE,TIMER1,I2C,UART1,UART2,DMA0,DMA1,
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SWT,UIE,UIE,I2C,UART1,UART2,DMA0,DMA1,
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DMA2,DMA3,QSPI,UIE,UIE,UIE,UIE,UIE,
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PDIR1FULL,PDIR2FULL,EBUTXEMPTY,IIS2TXEMPTY,
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IIS1TXEMPTY,PDIR3FULL,PDIR3RESYN,UQ2CHANERR,
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