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tuner_fc0012: add manual gain support 

Signed-off-by: Steve Markgraf <steve@steve-m.de>
This commit is contained in:
Steve Markgraf 2012-06-09 00:17:09 +02:00
parent 6aec27c6d0
commit e5afd9894d
2 changed files with 30 additions and 3 deletions
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2
src/librtlsdr.c
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@ -679,7 +679,7 @@ int rtlsdr_get_tuner_gains(rtlsdr_dev_t *dev, int *gains)
{
const int e4k_gains[] = { -10, 15, 40, 65, 90, 115, 140, 165, 190, 215,
240, 290, 340, 420, 430, 450, 470, 490 };
const int fc0012_gains[] = { 0 /* no gain values */ };
const int fc0012_gains[] = { -99, -40, 71, 179, 192 };
const int fc0013_gains[] = { -63, 71, 191, 197 };
const int fc2580_gains[] = { 0 /* no gain values */ };

31
src/tuner_fc0012.c
View File

@ -307,6 +307,33 @@ exit:
int fc0012_set_gain(void *dev, int gain)
{
/* TODO add gain regulation */
return 0;
int ret;
uint8_t tmp = 0;
ret = fc0012_readreg(dev, 0x13, &tmp);
/* mask bits off */
tmp &= 0xe0;
switch (gain) {
case -99: /* -9.9 dB */
tmp |= 0x02;
break;
case -40: /* -4 dB */
break;
case 71:
tmp |= 0x08; /* 7.1 dB */
break;
case 179:
tmp |= 0x17; /* 17.9 dB */
break;
case 192:
default:
tmp |= 0x10; /* 19.2 dB */
break;
}
ret = fc0012_writereg(dev, 0x13, tmp);
return ret;
}