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authorBertrik Sikken <bertrik@sikken.nl>2009-07-12 15:33:58 +0000
committerBertrik Sikken <bertrik@sikken.nl>2009-07-12 15:33:58 +0000
commit111af64e7431df1399f89a0e05ca8b3c8407e057 (patch)
treee2c3718bb3f4f0c15aeaac01605df655ff78d707 /firmware/target/arm
parent11f9f3cd46facc74385d29510dae4ab292f22275 (diff)
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Meizu M3: initial version of battery readout and (uncalibrated) charge/discharge curves
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21812 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/arm')
-rw-r--r--firmware/target/arm/s5l8700/meizu-m3/powermgmt-m3.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/firmware/target/arm/s5l8700/meizu-m3/powermgmt-m3.c b/firmware/target/arm/s5l8700/meizu-m3/powermgmt-m3.c
new file mode 100644
index 0000000000..3960dab2c1
--- /dev/null
+++ b/firmware/target/arm/s5l8700/meizu-m3/powermgmt-m3.c
@@ -0,0 +1,67 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright © 2009 Bertrik Sikken
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "config.h"
+#include "adc.h"
+#include "adc-target.h"
+#include "powermgmt.h"
+
+/* Battery voltage calculation and discharge/charge curves for the Meizu M3.
+
+ Battery voltage is calculated under the assumption that the adc full-scale
+ readout represents 3.00V and that the battery ADC channel is fed with
+ exactly half of the battery voltage (through a resistive divider).
+ Discharge and charge curves have not been calibrated yet.
+*/
+
+const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
+{
+ /* TODO: this is just an initial guess */
+ 3400
+};
+
+const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
+{
+ /* TODO: this is just an initial guess */
+ 3300
+};
+
+/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
+const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
+{
+ /* TODO: simple uncalibrated curve, linear except for first 10% */
+ { 3300, 3600, 3665, 3730, 3795, 3860, 3925, 3990, 4055, 4120, 4185 }
+};
+
+/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
+const unsigned short percent_to_volt_charge[11] =
+ /* TODO: simple uncalibrated curve, linear except for first 10% */
+ { 3300, 3600, 3665, 3730, 3795, 3860, 3925, 3990, 4055, 4120, 4185 };
+
+/* full-scale ADC readout (2^10) in millivolt */
+#define BATTERY_SCALE_FACTOR 6000
+
+/* Returns battery voltage from ADC [millivolts] */
+unsigned int battery_adc_voltage(void)
+{
+ return (adc_read(ADC_BATTERY) * BATTERY_SCALE_FACTOR) >> 10;
+}
+