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S2-LP: sync with development repository #11890

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Nov 22, 2019
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S2-LP: sync with development repository #11890

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14 changes: 13 additions & 1 deletion components/802.15.4_RF/stm-s2lp-rf-driver/source/NanostackRfPhys2lp.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -543,6 +543,19 @@ static void rf_set_channel_configuration_registers(void)
rf_channel_multiplier++;
}
rf_write_register(CHSPACE, ch_space);
/* Preamble is set for S2-LP as repetitions of 01 or 10 pair
*
* For datarate < 150kbps, using phyFskPreambleLength = 8 repetitions of 01010101
* For datarate >= 150kbps and datarate < 300kbps, using phyFskPreambleLength = 12 repetitions of 01010101
* For datarate >= 300kbps, using phyFskPreambleLength = 24 repetitions of 01010101
*/
uint8_t preamble_len = 24 * 4;
if (phy_subghz.datarate < 150000) {
preamble_len = 8 * 4;
} else if (phy_subghz.datarate < 300000) {
preamble_len = 12 * 4;
}
rf_write_register(PCKTCTRL5, preamble_len);
}

static void rf_init_registers(void)
Expand All @@ -557,7 +570,6 @@ static void rf_init_registers(void)
rf_write_register_field(PCKTCTRL2, PCKT_FCS_TYPE_FIELD, PCKT_FCS_TYPE_4_OCTET);
rf_write_register_field(PCKTCTRL3, PCKT_RXMODE_FIELD, PCKT_RXMODE_NORMAL);
rf_write_register_field(PCKTCTRL3, PCKT_BYTE_SWAP_FIELD, PCKT_BYTE_SWAP_LSB);
rf_write_register(PCKTCTRL5, PCKT_PREAMBLE_LEN);
rf_write_register_field(PCKTCTRL6, PCKT_SYNCLEN_FIELD, PCKT_SYNCLEN);
rf_write_register_field(QI, PQI_TH_FIELD, PQI_TH);
rf_write_register_field(QI, SQI_EN_FIELD, SQI_EN);
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