FS#9728: Battery current measuring on the Video iPod

Patch by Boris Gjenero. Displays the current flowing into or out of the
battery on the ipodvideo. Other ipods do not appear to have this ADC channel
connected.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23500 a1c6a512-1295-4272-9138-f99709370657

apps/debug_menu.c

@@ -1125,6 +1125,9 @@ bool dbg_ports(void)
 #ifdef ADC_ACCESSORY
         lcd_putsf(0, line++, "ACCESSORY: %d", adc_read(ADC_ACCESSORY));
 #endif
+#ifdef IPOD_VIDEO
+        lcd_putsf(0, line++, "4066_ISTAT: %d", adc_read(ADC_4066_ISTAT));
+#endif
 
 #if defined(IPOD_ACCESSORY_PROTOCOL)
 extern unsigned char serbuf[];
@@ -1529,6 +1532,16 @@ static bool view_battery(void)
                          dock    ? "enabled" : "disabled");
                 lcd_putsf(0, 7, "Headphone: %s",
                          headphone ? "connected" : "disconnected");
+#ifdef IPOD_VIDEO
+                x = (adc_read(ADC_4066_ISTAT) * 2400) /
+#if MEM == 64
+                (1024 * 2);
+#else
+                (1024 * 3);
+#endif
+                lcd_putsf(0, 8, "Ibat: %d mA", x);
+                lcd_putsf(0, 9, "Vbat * Ibat: %d mW", x * y / 1000);
+#endif
 #elif defined TOSHIBA_GIGABEAT_S
                 int line = 3;
                 unsigned int st;

firmware/target/arm/ipod/adc-ipod-pcf.c

@@ -87,5 +87,9 @@ void adc_init(void)
     adc_battery->timeout = 0;
     adcdata[ADC_ACCESSORY].channelnum = 4;
     adcdata[ADC_ACCESSORY].timeout = 0;
+#ifdef IPOD_VIDEO
+    adcdata[ADC_4066_ISTAT].channelnum = 7;
+    adcdata[ADC_4066_ISTAT].timeout = 0;
+#endif
     _adc_read(adc_battery);
 }

firmware/target/arm/ipod/adc-target.h

@@ -21,12 +21,16 @@
 #ifndef _ADC_TARGET_H_
 #define _ADC_TARGET_H_
 
-#define NUM_ADC_CHANNELS 2
-
 #define ADC_BATTERY 0
 #define ADC_ACCESSORY 1
 #define ADC_UNREG_POWER ADC_BATTERY
-
+#ifdef IPOD_VIDEO
+#define ADC_4066_ISTAT 2
+#define NUM_ADC_CHANNELS 3
+#else
+#define NUM_ADC_CHANNELS 2
+#endif
+ 
 /* Force a scan now */
 unsigned short adc_scan(int channel);
 #endif