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Use an 8 bit ADC read for battery reading on ipod, that provides better than centivolt precision any way, also enable charging, it seems to detect fine when charging by USB

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8966 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Brandon Low 2006-03-09 01:36:22 +00:00
parent c24569feee
commit ca9e8b6cf5
3 changed files with 9 additions and 16 deletions
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9
firmware/drivers/adc.c
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@ -298,12 +298,17 @@ static struct adc_struct adcdata[NUM_ADC_CHANNELS] IDATA_ATTR;
* a 13 bit value corresponding to 0-5.4v, the resulting range is 13FB-17FA,
* representing 3.1-5.4v */
static unsigned short ten_bit_subtractor(unsigned short data) {
return (data<<2)+0x13FB;
return (data<<2)+0x4FB;
}
static unsigned short _adc_scan(struct adc_struct *adc)
{
unsigned short data = pcf50605_a2d_read(adc->channelnum);
unsigned short data;
/* ADCC1, 8 bit, start */
pcf50605_write(0x2f, 0x80 | (adc->channelnum << 1) | 0x1);
data = pcf50605_read(0x30); /* ADCS1 */
if (adc->conversion) {
data = adc->conversion(data);
}