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Use average of two samples at both ends of the range for calculating smoother delta values.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1716 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Heikki Hannikainen 2002-08-13 16:06:29 +00:00
parent 677c5cc3b5
commit 9872b66cd1
2 changed files with 12 additions and 4 deletions
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8
apps/debug_menu.c
View file

@ -507,15 +507,19 @@ void view_battery(void)
lcd_puts(0, 4, buf);
#endif
y = ( power_history[POWER_HISTORY_LEN-1] * 100
+ power_history[POWER_HISTORY_LEN-2] * 100
- power_history[POWER_HISTORY_LEN-1-CHARGE_END_NEGD+1] * 100
- power_history[POWER_HISTORY_LEN-1-CHARGE_END_NEGD] * 100 )
/ CHARGE_END_NEGD;
/ CHARGE_END_NEGD / 2;
snprintf(buf, 30, "short delta: %d", y);
lcd_puts(0, 5, buf);
y = ( power_history[POWER_HISTORY_LEN-1] * 100
+ power_history[POWER_HISTORY_LEN-2] * 100
- power_history[POWER_HISTORY_LEN-1-CHARGE_END_ZEROD+1] * 100
- power_history[POWER_HISTORY_LEN-1-CHARGE_END_ZEROD] * 100 )
/ CHARGE_END_ZEROD;
/ CHARGE_END_ZEROD / 2;
snprintf(buf, 30, "long delta: %d", y);
lcd_puts(0, 6, buf);

8
firmware/powermgmt.c
View file

@ -179,8 +179,10 @@ static void power_thread(void)
* 0.0005 V).
*/
delta = ( power_history[POWER_HISTORY_LEN-1] * 100
+ power_history[POWER_HISTORY_LEN-2] * 100
- power_history[POWER_HISTORY_LEN-1-CHARGE_END_NEGD+1] * 100
- power_history[POWER_HISTORY_LEN-1-CHARGE_END_NEGD] * 100 )
/ CHARGE_END_NEGD;
/ CHARGE_END_NEGD / 2;
if (delta < -100) { /* delta < -10 mV */
DEBUGF("power: short-term negative delta, enough!\n");
@ -189,8 +191,10 @@ static void power_thread(void)
} else {
/* if we didn't disable the charger in the previous test, check for low positive delta */
delta = ( power_history[POWER_HISTORY_LEN-1] * 100
+ power_history[POWER_HISTORY_LEN-2] * 100
- power_history[POWER_HISTORY_LEN-1-CHARGE_END_ZEROD+1] * 100
- power_history[POWER_HISTORY_LEN-1-CHARGE_END_ZEROD] * 100 )
/ CHARGE_END_ZEROD;
/ CHARGE_END_ZEROD / 2;
if (delta < 1) { /* delta < 0.1 mV */
DEBUGF("power: long-term small positive delta, enough!\n");