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It turns out that the backlight port pin on the player can be set to an input (and pulled up externally) to shut off the backlight. That may save us a few picoamps :-)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4918 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2004-07-22 09:09:26 +00:00
parent e4fc3d471c
commit 6c7011415b
1 changed files with 3 additions and 7 deletions
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10
firmware/backlight.c
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@ -74,7 +74,7 @@ void backlight_thread(void)
/* Disable square wave */ /* Disable square wave */
rtc_write(0x0a, rtc_read(0x0a) & ~0x40); rtc_write(0x0a, rtc_read(0x0a) & ~0x40);
#else #else
or_b(0x40, &PADRH); and_b(~0x40, &PAIORH);
#endif #endif
} }
/* else if(backlight_timer) */ /* else if(backlight_timer) */
@ -85,6 +85,7 @@ void backlight_thread(void)
rtc_write(0x0a, rtc_read(0x0a) | 0x40); rtc_write(0x0a, rtc_read(0x0a) | 0x40);
#else #else
and_b(~0x40, &PADRH); and_b(~0x40, &PADRH);
or_b(0x40, &PAIORH);
#endif #endif
} }
break; break;
@ -94,7 +95,7 @@ void backlight_thread(void)
/* Disable square wave */ /* Disable square wave */
rtc_write(0x0a, rtc_read(0x0a) & ~0x40); rtc_write(0x0a, rtc_read(0x0a) & ~0x40);
#else #else
or_b(0x40, &PADRH); and_b(~0x40, &PAIORH);
#endif #endif
break; break;
@ -172,10 +173,5 @@ void backlight_init(void)
create_thread(backlight_thread, backlight_stack, create_thread(backlight_thread, backlight_stack,
sizeof(backlight_stack), backlight_thread_name); sizeof(backlight_stack), backlight_thread_name);
#ifndef HAVE_RTC
or_b(0x40, &PAIORH); /* Set data direction of PA14 */
#endif
backlight_on(); backlight_on();
} }