diff options
Diffstat (limited to 'usrp/host/lib/db_wbxng_adf4350.cc')
| -rw-r--r-- | usrp/host/lib/db_wbxng_adf4350.cc | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/usrp/host/lib/db_wbxng_adf4350.cc b/usrp/host/lib/db_wbxng_adf4350.cc index c17e8d670..fe80cceeb 100644 --- a/usrp/host/lib/db_wbxng_adf4350.cc +++ b/usrp/host/lib/db_wbxng_adf4350.cc @@ -27,9 +27,7 @@ #include <stdio.h> #define FREQ_C(freq) uint64_t(freq) -#define INPUT_REF_FREQ FREQ_C(64e6) #define DIV_ROUND(num, denom) (((num) + ((denom)/2))/(denom)) -#define INPUT_REF_FREQ_2X (2*INPUT_REF_FREQ) /* input ref freq with doubler turned on */ #define MIN_INT_DIV uint16_t(23) /* minimum int divider, prescaler 4/5 only */ #define MAX_RF_DIV uint8_t(16) /* max rf divider, divides rf output */ #define MIN_VCO_FREQ FREQ_C(2.2e9) /* minimum vco freq */ @@ -130,7 +128,7 @@ adf4350::_write(uint8_t addr, uint32_t data) } bool -adf4350::_set_freq(freq_t freq) +adf4350::_set_freq(freq_t freq, freq_t refclock_freq) { /* Set the frequency by setting int, frac, mod, r, div */ if (freq > MAX_FREQ || freq < MIN_FREQ) return false; @@ -147,7 +145,7 @@ adf4350::_set_freq(freq_t freq) d_regs->d_divider_select++; //double the divider } /* Ramp up the R divider until the N divider is at least the minimum. */ - //d_regs->d_10_bit_r_counter = INPUT_REF_FREQ*MIN_INT_DIV/freq; + //d_regs->d_10_bit_r_counter = refclock_freq*MIN_INT_DIV/freq; d_regs->d_10_bit_r_counter = 2; uint64_t n_mod; do{ @@ -155,7 +153,7 @@ adf4350::_set_freq(freq_t freq) n_mod = freq; n_mod *= d_regs->d_10_bit_r_counter; n_mod *= d_regs->d_mod; - n_mod /= INPUT_REF_FREQ; + n_mod /= refclock_freq; /* calculate int and frac */ d_regs->d_int = n_mod/d_regs->d_mod; d_regs->d_frac = (n_mod - (freq_t)d_regs->d_int*d_regs->d_mod) & uint16_t(0xfff); @@ -169,11 +167,11 @@ adf4350::_set_freq(freq_t freq) }while(d_regs->d_int < min_int_div); /* calculate the band select so PFD is under 125 KHz */ d_regs->d_8_bit_band_select_clock_divider_value = \ - INPUT_REF_FREQ/(FREQ_C(30e3)*d_regs->d_10_bit_r_counter) + 1; + refclock_freq/(FREQ_C(30e3)*d_regs->d_10_bit_r_counter) + 1; /* fprintf(stderr, "Band Selection: Div %u, Freq %lu\n", d_regs->d_8_bit_band_select_clock_divider_value, - INPUT_REF_FREQ/(d_regs->d_8_bit_band_select_clock_divider_value * d_regs->d_10_bit_r_counter) + 1 + refclock_freq/(d_regs->d_8_bit_band_select_clock_divider_value * d_regs->d_10_bit_r_counter) + 1 ); */ d_regs->_load_register(5); @@ -187,7 +185,7 @@ adf4350::_set_freq(freq_t freq) } freq_t -adf4350::_get_freq(void) +adf4350::_get_freq(freq_t refclock_freq) { /* Calculate the freq from int, frac, mod, ref, r, div: * freq = (int + frac/mod) * (ref/r) @@ -198,7 +196,7 @@ adf4350::_get_freq(void) temp = d_regs->d_int; temp *= d_regs->d_mod; temp += d_regs->d_frac; - temp *= INPUT_REF_FREQ; + temp *= refclock_freq; temp /= d_regs->d_mod; temp /= d_regs->d_10_bit_r_counter; temp /= (1 << d_regs->d_divider_select); |