Florian Kaltenberger
a026c87bbe
updating emos-raw (seperate thread for logfile, GPS supported again) small cosmetic changes in openair1 git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5241 818b1a75-f10b-46b9-bf7c-635c3b92a50f
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
#include "openair0_lib.h"
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#include "gain_control.h"
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//#define DEBUG_PHY
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void gain_control_all (unsigned int rx_power_fil_dB, unsigned int card) {
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unsigned int ant;
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for (ant=0;ant<4;ant++)
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gain_control (rx_power_fil_dB,ant,card);
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}
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void gain_control (unsigned int rx_power_fil_dB, unsigned int ant, unsigned int card) {
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exmimo_config_t *p_exmimo_config = openair0_exmimo_pci[card].exmimo_config_ptr;
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unsigned int rf_mode, rx_gain, LNA;
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rx_gain = p_exmimo_config->rf.rx_gain[ant][0];
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rf_mode = p_exmimo_config->rf.rf_mode[ant];
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LNA = rf_mode & LNAGAINMASK;
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// Gain control with hysterisis
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if (rx_power_fil_dB < TARGET_RX_POWER_MIN) { //increase gain
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switch (LNA) {
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case LNAByp:
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p_exmimo_config->rf.rf_mode[ant] = (rf_mode & (~LNAGAINMASK)) | LNAMed;
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break;
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case LNAMed:
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p_exmimo_config->rf.rf_mode[ant] = (rf_mode & (~LNAGAINMASK)) | LNAMax;
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break;
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case LNAMax:
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p_exmimo_config->rf.rx_gain[ant][0] = min(30,rx_gain+5);
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break;
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default:
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break;
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}
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}
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else if (rx_power_fil_dB > TARGET_RX_POWER_MAX) { //decrease gain
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if (rx_gain==0) {
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switch (LNA) {
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case LNAMax:
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p_exmimo_config->rf.rf_mode[ant] = (rf_mode & (~LNAGAINMASK)) | LNAMed;
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break;
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case LNAMed:
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p_exmimo_config->rf.rf_mode[ant] = (rf_mode & (~LNAGAINMASK)) | LNAByp;
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break;
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case LNAByp:
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break;
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default:
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break;
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}
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}
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else {
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p_exmimo_config->rf.rx_gain[ant][0] = max(0,(int)rx_gain-5);
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}
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}
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#ifdef DEBUG_PHY
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LOG_D(PHY,"AGC for chain %d: rx_power_fil_dB=%d, rx_gain=%d, LNA=%d (1=Byp,2=Med,3=Max)\n",ant,rx_power_fil_dB,p_exmimo_config->rf.rx_gain[ant][0],(p_exmimo_config->rf.rf_mode&LNAGAINMASK)>>14);
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#endif //DEBUG_PHY
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}
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