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@ -178,12 +178,8 @@ void srslte_ue_dl_set_sample_offset(srslte_ue_dl_t * q, float sample_offset) {
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* - PDCCH decoding: Find DCI for RNTI given by previous call to srslte_ue_dl_set_rnti()
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* - PDCCH decoding: Find DCI for RNTI given by previous call to srslte_ue_dl_set_rnti()
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* - PDSCH decoding: Decode TB scrambling with RNTI given by srslte_ue_dl_set_rnti()
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* - PDSCH decoding: Decode TB scrambling with RNTI given by srslte_ue_dl_set_rnti()
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*/
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*/
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int srslte_ue_dl_decode(srslte_ue_dl_t *q, cf_t *input, uint8_t *data, uint32_t sf_idx) {
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int srslte_ue_dl_decode(srslte_ue_dl_t *q, cf_t *input, uint8_t *data, uint32_t tti) {
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return srslte_ue_dl_decode_rnti_rv(q, input, data, sf_idx, q->current_rnti, 0);
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return srslte_ue_dl_decode_rnti(q, input, data, tti, q->current_rnti);
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}
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int srslte_ue_dl_decode_rnti(srslte_ue_dl_t *q, cf_t *input, uint8_t *data, uint32_t sf_idx, uint16_t rnti) {
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return srslte_ue_dl_decode_rnti_rv(q, input, data, sf_idx, rnti, 0);
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}
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}
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int srslte_ue_dl_decode_fft_estimate(srslte_ue_dl_t *q, cf_t *input, uint32_t sf_idx, uint32_t *cfi) {
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int srslte_ue_dl_decode_fft_estimate(srslte_ue_dl_t *q, cf_t *input, uint32_t sf_idx, uint32_t *cfi) {
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@ -241,47 +237,86 @@ int srslte_ue_dl_cfg_grant(srslte_ue_dl_t *q, srslte_ra_dl_grant_t *grant, uint3
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return srslte_pdsch_cfg(&q->pdsch_cfg, q->cell, grant, cfi, sf_idx, rvidx);
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return srslte_pdsch_cfg(&q->pdsch_cfg, q->cell, grant, cfi, sf_idx, rvidx);
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}
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}
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int srslte_ue_dl_decode_rnti_rv_packet(srslte_ue_dl_t *q, srslte_ra_dl_grant_t *grant, uint8_t *data,
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int srslte_ue_dl_decode_rnti(srslte_ue_dl_t *q, cf_t *input, uint8_t *data, uint32_t tti, uint16_t rnti)
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uint32_t cfi, uint32_t sf_idx, uint16_t rnti, uint32_t rvidx)
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{
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{
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srslte_dci_msg_t dci_msg;
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srslte_ra_dl_dci_t dci_unpacked;
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srslte_ra_dl_grant_t grant;
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int ret = SRSLTE_ERROR;
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int ret = SRSLTE_ERROR;
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uint32_t cfi;
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q->nof_detected++;
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uint32_t sf_idx = tti%10;
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/* Setup PDSCH configuration for this CFI, SFIDX and RVIDX */
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if ((ret = srslte_ue_dl_decode_fft_estimate(q, input, sf_idx, &cfi)) < 0) {
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if (srslte_ue_dl_cfg_grant(q, grant, cfi, sf_idx, rvidx)) {
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return ret;
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return SRSLTE_ERROR;
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}
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}
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if (q->pdsch_cfg.rv == 0) {
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if (srslte_pdcch_extract_llr(&q->pdcch, q->sf_symbols, q->ce, srslte_chest_dl_get_noise_estimate(&q->chest), sf_idx, cfi)) {
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srslte_softbuffer_rx_reset_tbs(&q->softbuffer, grant->mcs.tbs);
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fprintf(stderr, "Error extracting LLRs\n");
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return SRSLTE_ERROR;
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}
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}
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// Uncoment next line to do ZF by default in pdsch_ue example
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int found_dci = srslte_ue_dl_find_dl_dci(q, cfi, sf_idx, rnti, &dci_msg);
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//float noise_estimate = 0;
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if (found_dci == 1) {
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float noise_estimate = srslte_chest_dl_get_noise_estimate(&q->chest);
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if (srslte_dci_msg_to_dl_grant(&dci_msg, rnti, q->cell.nof_prb, q->cell.nof_ports, &dci_unpacked, &grant)) {
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if (q->pdsch_cfg.grant.mcs.mod > 0 && q->pdsch_cfg.grant.mcs.tbs >= 0) {
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fprintf(stderr, "Error unpacking DCI\n");
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ret = srslte_pdsch_decode_rnti(&q->pdsch, &q->pdsch_cfg, &q->softbuffer,
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return SRSLTE_ERROR;
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q->sf_symbols, q->ce,
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}
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noise_estimate,
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rnti, data);
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/* ===== These lines of code are supposed to be MAC functionality === */
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if (ret == SRSLTE_ERROR) {
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q->pkt_errors++;
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uint32_t rvidx = 0;
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} else if (ret == SRSLTE_ERROR_INVALID_INPUTS) {
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if (dci_unpacked.rv_idx < 0) {
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fprintf(stderr, "Error calling srslte_pdsch_decode()\n");
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uint32_t sfn = tti/10;
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} else if (ret == SRSLTE_SUCCESS) {
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uint32_t k = (sfn/2)%4;
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if (SRSLTE_VERBOSE_ISDEBUG()) {
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rvidx = ((uint32_t) ceilf((float)1.5*k))%4;
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INFO("Decoded Message: ", 0);
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srslte_softbuffer_rx_reset_tbs(&q->softbuffer, grant.mcs.tbs);
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srslte_vec_fprint_hex(stdout, data, q->pdsch_cfg.grant.mcs.tbs);
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} else {
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rvidx = dci_unpacked.rv_idx;
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srslte_softbuffer_rx_reset_tbs(&q->softbuffer, grant.mcs.tbs);
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}
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if (srslte_ue_dl_cfg_grant(q, &grant, cfi, sf_idx, rvidx)) {
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return SRSLTE_ERROR;
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}
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/* ===== End of MAC functionality ========== */
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q->nof_detected++;
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// Uncoment next line to do ZF by default in pdsch_ue example
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//float noise_estimate = 0;
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float noise_estimate = srslte_chest_dl_get_noise_estimate(&q->chest);
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if (q->pdsch_cfg.grant.mcs.mod > 0 && q->pdsch_cfg.grant.mcs.tbs >= 0) {
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ret = srslte_pdsch_decode_rnti(&q->pdsch, &q->pdsch_cfg, &q->softbuffer,
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q->sf_symbols, q->ce,
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noise_estimate,
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rnti, data);
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if (ret == SRSLTE_ERROR) {
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q->pkt_errors++;
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} else if (ret == SRSLTE_ERROR_INVALID_INPUTS) {
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fprintf(stderr, "Error calling srslte_pdsch_decode()\n");
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} else if (ret == SRSLTE_SUCCESS) {
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if (SRSLTE_VERBOSE_ISDEBUG()) {
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INFO("Decoded Message: ", 0);
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srslte_vec_fprint_hex(stdout, data, q->pdsch_cfg.grant.mcs.tbs);
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}
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}
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}
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}
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}
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q->pkts_total++;
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}
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}
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return ret;
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}
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q->pkts_total++;
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if (found_dci == 1 && ret == SRSLTE_SUCCESS) {
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return q->pdsch_cfg.grant.mcs.tbs;
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} else {
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return 0;
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}
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}
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uint32_t srslte_ue_dl_get_ncce(srslte_ue_dl_t *q) {
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uint32_t srslte_ue_dl_get_ncce(srslte_ue_dl_t *q) {
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return q->last_location.ncce;
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return q->last_location.ncce;
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@ -423,44 +458,6 @@ int srslte_ue_dl_find_dl_dci_type(srslte_ue_dl_t *q, uint32_t cfi, uint32_t sf_i
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}
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}
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}
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}
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int srslte_ue_dl_decode_rnti_rv(srslte_ue_dl_t *q, cf_t *input, uint8_t *data, uint32_t sf_idx, uint16_t rnti, uint32_t rvidx)
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{
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srslte_dci_msg_t dci_msg;
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srslte_ra_dl_dci_t dci_unpacked;
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srslte_ra_dl_grant_t grant;
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int ret = SRSLTE_ERROR;
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uint32_t cfi;
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if ((ret = srslte_ue_dl_decode_fft_estimate(q, input, sf_idx, &cfi)) < 0) {
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return ret;
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}
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if (srslte_pdcch_extract_llr(&q->pdcch, q->sf_symbols, q->ce, srslte_chest_dl_get_noise_estimate(&q->chest), sf_idx, cfi)) {
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fprintf(stderr, "Error extracting LLRs\n");
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return SRSLTE_ERROR;
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}
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int found_dci = srslte_ue_dl_find_dl_dci(q, cfi, sf_idx, rnti, &dci_msg);
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if (found_dci == 1) {
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if (srslte_dci_msg_to_dl_grant(&dci_msg, rnti, q->cell.nof_prb, q->cell.nof_ports, &dci_unpacked, &grant)) {
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fprintf(stderr, "Error unpacking DCI\n");
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return SRSLTE_ERROR;
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}
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ret = srslte_ue_dl_decode_rnti_rv_packet(q, &grant, data, cfi, sf_idx, rnti, rvidx);
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}
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if (found_dci == 1 && ret == SRSLTE_SUCCESS) {
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return q->pdsch_cfg.grant.mcs.tbs;
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} else {
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return 0;
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}
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}
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bool srslte_ue_dl_decode_phich(srslte_ue_dl_t *q, uint32_t sf_idx, uint32_t n_prb_lowest, uint32_t n_dmrs)
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bool srslte_ue_dl_decode_phich(srslte_ue_dl_t *q, uint32_t sf_idx, uint32_t n_prb_lowest, uint32_t n_dmrs)
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{
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{
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uint8_t ack_bit;
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uint8_t ack_bit;
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