/***************************************************************************//**
* @brief Initializes the AD9122.
*
* @param pfnSetDataClock - Pointer to a function which sets the data clock
* @param pfnSetDacClock - Pointer to a function which sets the DAC clock
* @param pfnRoundRateDataClock - Pointer to a function which computes the
* actual data clock for a desired clock value
* @param pfnRoundRateDacClock - Pointer to a function which computes the
* actual DAC clock for a desired clock value
*
* @return Returns negative error code or 0 in case of success.
*******************************************************************************/
int32_t ad9122_setup(void* pfnSetDataClock,
void* pfnSetDacClock,
void* pfnSetRefClock,
void* pfnRoundRateDataClock,
void* pfnRoundRateDacClock,
void* pfnRoundRateRefClock)
{
int32_t ret;
int32_t i;
uint32_t datapath_ctrl, rate;
struct cf_axi_converter *conv = &dds_conv;
if(ad9122_reset() < 0)
return -1;
pfnSetDataClk = pfnSetDataClock;
pfnSetDacClk = pfnSetDacClock;
pfnSetRefClk = pfnSetRefClock;
pfnRoundRateDataClk = pfnRoundRateDataClock;
pfnRoundRateDacClk = pfnRoundRateDacClock;
pfnRoundRateRefClk = pfnRoundRateRefClock;
conv->write = ad9122_write;
conv->read = ad9122_read;
conv->setup = ad9122_tune_dci;
conv->get_fifo_status = ad9122_get_fifo_status;
conv->get_data_clk = ad9122_get_data_clk;
conv->write_raw = ad9122_write_raw;
conv->read_raw = ad9122_read_raw;
for (i = 0; i < ARRAY_SIZE(ad9122_reg_defaults); i++)
{
ad9122_write(ad9122_reg_defaults[i][0],
ad9122_reg_defaults[i][1]);
}
if(ad9122_sync() < 0)
return -1;
conv->interp_factor = 1;
conv->interp_factor = ad9122_validate_interp_factor(conv->interp_factor);
conv->fcenter_shift = 0;
datapath_ctrl = AD9122_DATAPATH_CTRL_BYPASS_PREMOD |
AD9122_DATAPATH_CTRL_BYPASS_NCO |
AD9122_DATAPATH_CTRL_BYPASS_INV_SINC;
ad9122_write(AD9122_REG_DATAPATH_CTRL, datapath_ctrl);
rate = 491520000;
ret = ad9122_set_interpol(conv, conv->interp_factor,
conv->fcenter_shift, rate);
cf_axi_dds_of_probe();
return ret;
}
/***************************************************************************//**
* @brief Sets the interpolation frequency.
*
* @param conv - Pointer to a cf_axi_converter struct.
* @param freq - Interpolation frequency in Hz
*
* @return Returns negative error code or 0 in case of success.
*******************************************************************************/
static int32_t ad9122_set_interpol_freq(struct cf_axi_converter *conv,
uint32_t freq)
{
uint32_t dat_freq;
int32_t ret;
dat_freq = ad9122_get_data_clk(conv);
ret = ad9122_set_interpol(conv, freq / dat_freq,
conv->fcenter_shift, 0);
ad9122_update_avail_fcent_modes(conv, dat_freq);
return ret;
}
/***************************************************************************//**
* @brief Sets the interpolation center frequency shift.
*
* @param conv - Pointer to a cf_axi_converter struct.
* @param freq - Center frequency shift in Hz
*
* @return Returns negative error code or 0 in case of success.
*******************************************************************************/
static int32_t ad9122_set_interpol_fcent_freq(struct cf_axi_converter *conv,
uint32_t freq)
{
return ad9122_set_interpol(conv, conv->interp_factor,
(freq * 2) / ad9122_get_data_clk(conv), 0);
}
/***************************************************************************//**
* @brief Sets the interpolation frequency.
*
* @param conv - Pointer to a cf_axi_dds_converter struct.
* @param freq - Interpolation frequency in Hz
*
* @return Returns negative error code or 0 in case of success.
*******************************************************************************/
static int32_t ad9122_set_interpol_freq(struct cf_axi_dds_converter *conv,
uint32_t freq)
{
return ad9122_set_interpol(conv, freq / ad9122_get_data_clk(conv),
conv->fcenter_shift, 0);
}
