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high-side injection for tuning below 2150 MHz (known bug: baseband spectrum is inverted on TX)

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This commit is contained in:
Michael Ossmann
2014-08-15 07:49:13 -06:00
parent 31c82a879a
commit c8742572db
1 changed files with 12 additions and 2 deletions
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14
firmware/common/tuning.c
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@ -66,16 +66,20 @@ bool set_freq(const uint64_t freq)
if(freq_mhz < MAX_LP_FREQ_MHZ) if(freq_mhz < MAX_LP_FREQ_MHZ)
{ {
rf_path_set_filter(RF_PATH_FILTER_LOW_PASS); rf_path_set_filter(RF_PATH_FILTER_LOW_PASS);
RFFC5071_freq_mhz = (max2837_freq_nominal_hz / FREQ_ONE_MHZ) - freq_mhz; /* IF is graduated from 2650 MHz to 2343 MHz */
max2837_freq_nominal_hz = 2650000000 - (freq / 7);
RFFC5071_freq_mhz = (max2837_freq_nominal_hz / FREQ_ONE_MHZ) + freq_mhz;
/* Set Freq and read real freq */ /* Set Freq and read real freq */
real_RFFC5071_freq_hz = rffc5071_set_frequency(RFFC5071_freq_mhz); real_RFFC5071_freq_hz = rffc5071_set_frequency(RFFC5071_freq_mhz);
max2837_set_frequency(freq + real_RFFC5071_freq_hz); max2837_set_frequency(real_RFFC5071_freq_hz - freq);
sgpio_cpld_stream_rx_set_q_invert(1);
}else if( (freq_mhz >= MIN_BYPASS_FREQ_MHZ) && (freq_mhz < MAX_BYPASS_FREQ_MHZ) ) }else if( (freq_mhz >= MIN_BYPASS_FREQ_MHZ) && (freq_mhz < MAX_BYPASS_FREQ_MHZ) )
{ {
rf_path_set_filter(RF_PATH_FILTER_BYPASS); rf_path_set_filter(RF_PATH_FILTER_BYPASS);
MAX2837_freq_hz = (freq_mhz * FREQ_ONE_MHZ) + freq_hz; MAX2837_freq_hz = (freq_mhz * FREQ_ONE_MHZ) + freq_hz;
/* RFFC5071_freq_mhz <= not used in Bypass mode */ /* RFFC5071_freq_mhz <= not used in Bypass mode */
max2837_set_frequency(MAX2837_freq_hz); max2837_set_frequency(MAX2837_freq_hz);
sgpio_cpld_stream_rx_set_q_invert(0);
}else if( (freq_mhz >= MIN_HP_FREQ_MHZ) && (freq_mhz <= MAX_HP_FREQ_MHZ) ) }else if( (freq_mhz >= MIN_HP_FREQ_MHZ) && (freq_mhz <= MAX_HP_FREQ_MHZ) )
{ {
if (freq_mhz < MID1_HP_FREQ_MHZ) { if (freq_mhz < MID1_HP_FREQ_MHZ) {
@ -93,6 +97,7 @@ bool set_freq(const uint64_t freq)
/* Set Freq and read real freq */ /* Set Freq and read real freq */
real_RFFC5071_freq_hz = rffc5071_set_frequency(RFFC5071_freq_mhz); real_RFFC5071_freq_hz = rffc5071_set_frequency(RFFC5071_freq_mhz);
max2837_set_frequency(freq - real_RFFC5071_freq_hz); max2837_set_frequency(freq - real_RFFC5071_freq_hz);
sgpio_cpld_stream_rx_set_q_invert(0);
}else }else
{ {
/* Error freq_mhz too high */ /* Error freq_mhz too high */
@ -124,6 +129,11 @@ bool set_freq_explicit(const uint64_t if_freq_hz, const uint64_t lo_freq_hz,
rf_path_set_filter(path); rf_path_set_filter(path);
max2837_set_frequency(if_freq_hz); max2837_set_frequency(if_freq_hz);
if (lo_freq_hz > if_freq_hz) {
sgpio_cpld_stream_rx_set_q_invert(1);
} else {
sgpio_cpld_stream_rx_set_q_invert(0);
}
if (path != RF_PATH_FILTER_BYPASS) { if (path != RF_PATH_FILTER_BYPASS) {
(void)rffc5071_set_frequency(lo_freq_hz / FREQ_ONE_MHZ); (void)rffc5071_set_frequency(lo_freq_hz / FREQ_ONE_MHZ);
} }