static inline unsigned vbatt_adjust(struct ads7846 *ts, ssize_t v)
{
unsigned retval = vaux_adjust(ts, v);
/* ads7846 has a resistor ladder to scale this signal down */
if (ts->model == 7846)
retval *= 4;
return retval;
}
static inline unsigned vbatt_adjust(struct ak4182 *ts, ssize_t v)
{
#if 0
unsigned retval = vaux_adjust(ts, v);
/* ak4182 has a resistor ladder to scale this signal down */
if (ts->model == 4182)
retval *= 4;
return retval;
#endif
unsigned retval,vbatt[10],average;
int i,delta;
unsigned max = 0,min = 100000,sum =0;
if (ts->model == 4182) {
for (i=0;i<10;i++) {
retval = vaux_adjust(ts,v);
retval *= 4;
vbatt[i] = retval;
}
}
for (i=0;i<10;i++) {
max = max > vbatt[i]? max : vbatt[i];
min = min < vbatt[i]? min : vbatt[i];
sum += vbatt[i];
}
average = (sum -min -max) / 8;
if (average <3250) delta = (-32)*average/44+2431;
else if (average>=3250 && average <3487) delta = 36*average/237-425;
else if (average>=3487 && average <3555) delta = (-24)*average/68+1334;
else if (average>=3555 && average <3682) delta = 44*average/127-1151;
else if (average>=3682 && average <3840) delta = (-100)*average/158+2454;
else if (average>=3840 && average <4058) delta = 44*average/218-751;
else delta=(-4)*average/108+218;
delta = delta/2;
if (abs(average - max)<delta && abs(average - min)<delta) {
retval = 1000*(average - 139)/959;
return retval;
}
else return 0;
}
