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Add baseband sampling frequencies useful for 48kHz audio output.

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This commit is contained in:
Jared Boone
2013-12-31 20:05:26 -08:00
parent 9f2260237b
commit 1bec883f80
1 changed files with 24 additions and 1 deletions
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25
firmware/common/hackrf_core.c
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@ -190,16 +190,32 @@ bool sample_rate_set(const uint32_t sample_rate_hz) {
#if (defined JAWBREAKER || defined HACKRF_ONE)
uint32_t p1 = 4608;
uint32_t p2 = 0;
uint32_t p3 = 0;
switch(sample_rate_hz) {
case 8000000:
p1 = SI_INTDIV(50); // 800MHz / 50 = 16 MHz (SGPIO), 8 MHz (codec)
break;
case 9216000:
// 43.40277777777778: a = 43; b = 29; c = 72
p1 = 5043;
p2 = 40;
p3 = 72;
break;
case 10000000:
p1 = SI_INTDIV(40); // 800MHz / 40 = 20 MHz (SGPIO), 10 MHz (codec)
break;
case 12288000:
// 32.552083333333336: a = 32; b = 159; c = 288
p1 = 3654;
p2 = 192;
p3 = 288;
break;
case 12500000:
p1 = SI_INTDIV(32); // 800MHz / 32 = 25 MHz (SGPIO), 12.5 MHz (codec)
break;
@ -208,6 +224,13 @@ bool sample_rate_set(const uint32_t sample_rate_hz) {
p1 = SI_INTDIV(25); // 800MHz / 25 = 32 MHz (SGPIO), 16 MHz (codec)
break;
case 18432000:
// 21.70138888889: a = 21; b = 101; c = 144
p1 = 2265;
p2 = 112;
p3 = 144;
break;
case 20000000:
p1 = SI_INTDIV(20); // 800MHz / 20 = 40 MHz (SGPIO), 20 MHz (codec)
break;
@ -217,7 +240,7 @@ bool sample_rate_set(const uint32_t sample_rate_hz) {
}
/* MS0/CLK0 is the source for the MAX5864/CPLD (CODEC_CLK). */
si5351c_configure_multisynth(0, p1, 0, 1, 1);
si5351c_configure_multisynth(0, p1, p2, p3, 1);
/* MS0/CLK1 is the source for the CPLD (CODEC_X2_CLK). */
si5351c_configure_multisynth(1, p1, 0, 1, 0);//p1 doesn't matter