freemyipod r734 - Code Review

Repository:	freemyipod
Revision:	< r733‎ \| r734 \| r735 >
Date:	01:03, 12 July 2011
Author:	theseven
Status:	new
Tags:
Comment:	emCORE: Add Vbus detection for iPod Nano 4G
Modified paths:	/emcore/trunk/target/ipodnano4g/power.c (modified) (history)

Diff [purge]

Index: emcore/trunk/target/ipodnano4g/power.c
—	—	@@ -22,9 +22,15 @@
23	23
24	24
25	25	#include "global.h"
	26	+#include "i2c.h"
	27	+#include "timer.h"
26	28	#include "power.h"
27	29
28	30
	31	+long power_last_update;
	32	+bool power_last_state;
	33	+
	34	+
29	35	void reset();
30	36
31	37
—	—	@@ -35,6 +41,7 @@
36	42
37	43	void power_init(void)
38	44	{
	45	+ power_last_update = 0;
39	46	}
40	47
41	48	bool charging_state(void)
—	—	@@ -44,12 +51,17 @@
45	52
46	53	bool external_power_state(void)
47	54	{
48		~~- return false;~~
	55	+ return vbus_state();
49	56	}
50	57
51	58	bool vbus_state(void)
52	59	{
53		~~- return true;~~
	60	+ if (TIMEOUT_EXPIRED(power_last_update, 200000))
	61	+ {
	62	+ power_last_update = USEC_TIMER;
	63	+ power_last_state = !!(i2c_recvbyte(0, 0xe6, 4) & 0x40);
	64	+ }
	65	+ return power_last_state;
54	66	}
55	67
56	68	int read_battery_voltage(int battery)