diff options
Diffstat (limited to 'src/cc1111/ao_radio.c')
| -rw-r--r-- | src/cc1111/ao_radio.c | 176 |
1 files changed, 148 insertions, 28 deletions
diff --git a/src/cc1111/ao_radio.c b/src/cc1111/ao_radio.c index 190647ce..b9821a42 100644 --- a/src/cc1111/ao_radio.c +++ b/src/cc1111/ao_radio.c @@ -40,6 +40,42 @@ #define IF_FREQ_CONTROL 6 /* + * http://www.ntia.doc.gov/files/ntia/publications/84-168.pdf + * + * Necessary bandwidth for a FSK modulated signal: + * + * bw = 2.6d + 0.55b 1.5 < m < 5.5 + * bw = 2.1d + 1.9b 5.5 < m < 20 + * + * b is the modulation rate in bps + * d is the peak deviation (from the center) + * + * m = 2d / b + * + * 20.5 kHz deviation 38.4kbps signal: + * + * m = 41 / 38.4, which is < 5.5: + * + * bw = 2.6 * 20.5 + 0.55 * 38.4 = 74.42kHz + * + * M = 1, E = 3, bw = 75kHz + * + * 5.125 kHz deviation, 9.6kbps signal + * + * m = 10.25 / 9.6, which is < 5.5: + * + * bw = 2.6 * 5.125 + 0.55 * 9.6 = 18.6kHz + * + * M = 2, E = 3, bw = 53.6kHz + * + * 1.28125kHz deviation, 2.4kbps signal + * + * m = 2.565 / 2.4, which is < 5.5: + * + * bw = 2.6 * 20.5 + 1.9 * 2.4 = 47.61kHz + * + * M = 3, E = 3, bw = 53.6kHz + * * For channel bandwidth of 93.75 kHz, the CHANBW_E and CHANBW_M values are * * BW = 24e6 / (8 * (4 + M) * 2 ** E) @@ -47,7 +83,9 @@ * So, M = 0 and E = 3 */ -#define CHANBW_M 0 +#define CHANBW_M_384 1 +#define CHANBW_M_96 3 +#define CHANBW_M_24 3 #define CHANBW_E 3 /* @@ -55,22 +93,41 @@ * * R = (256 + M) * 2** E * 24e6 / 2**28 * - * So M is 163 and E is 10 + * So for 38360kBaud, M is 163 and E is 10 */ -#define DRATE_E 10 #define DRATE_M 163 +#define DRATE_E_384 10 + +/* For 9600 baud, M is 163 and E is 8 + */ + +#define DRATE_E_96 8 + +/* For 2400 baud, M is 163 and E is 6 + */ + +#define DRATE_E_24 6 + /* * For a channel deviation of 20.5kHz, the DEVIATION_E and DEVIATION_M values are: * * F = 24e6/2**17 * (8 + DEVIATION_M) * 2**DEVIATION_E * - * So M is 6 and E is 3 + * For 20.5kHz deviation, M is 6 and E is 3 + * For 5.125kHz deviation, M is 6 and E is 1 + * For 1.28125kHz deviation, M is 0 and E is 0 */ -#define DEVIATION_M 6 -#define DEVIATION_E 3 +#define DEVIATION_M_384 6 +#define DEVIATION_E_384 3 + +#define DEVIATION_M_96 6 +#define DEVIATION_E_96 1 + +#define DEVIATION_M_24 0 +#define DEVIATION_E_24 0 /* * For our RDF beacon, set the symbol rate to 2kBaud (for a 1kHz tone), @@ -122,13 +179,10 @@ static __code uint8_t radio_setup[] = { RF_FSCTRL1_OFF, (IF_FREQ_CONTROL << RF_FSCTRL1_FREQ_IF_SHIFT), RF_FSCTRL0_OFF, (0 << RF_FSCTRL0_FREQOFF_SHIFT), - RF_MDMCFG4_OFF, ((CHANBW_E << RF_MDMCFG4_CHANBW_E_SHIFT) | - (CHANBW_M << RF_MDMCFG4_CHANBW_M_SHIFT) | - (DRATE_E << RF_MDMCFG4_DRATE_E_SHIFT)), RF_MDMCFG3_OFF, (DRATE_M << RF_MDMCFG3_DRATE_M_SHIFT), - RF_MDMCFG2_OFF, (RF_MDMCFG2_DEM_DCFILT_OFF | + RF_MDMCFG2_OFF, (RF_MDMCFG2_DEM_DCFILT_ON | RF_MDMCFG2_MOD_FORMAT_GFSK | - RF_MDMCFG2_SYNC_MODE_15_16_THRES), + RF_MDMCFG2_SYNC_MODE_15_16), RF_MDMCFG1_OFF, (RF_MDMCFG1_FEC_EN | RF_MDMCFG1_NUM_PREAMBLE_4 | (2 << RF_MDMCFG1_CHANSPC_E_SHIFT)), @@ -136,9 +190,6 @@ static __code uint8_t radio_setup[] = { RF_CHANNR_OFF, 0, - RF_DEVIATN_OFF, ((DEVIATION_E << RF_DEVIATN_DEVIATION_E_SHIFT) | - (DEVIATION_M << RF_DEVIATN_DEVIATION_M_SHIFT)), - /* SmartRF says set LODIV_BUF_CURRENT_TX to 0 * And, we're not using power ramping, so use PA_POWER 0 */ @@ -155,8 +206,8 @@ static __code uint8_t radio_setup[] = { RF_FSCAL1_OFF, 0x00, RF_FSCAL0_OFF, 0x1F, - RF_TEST2_OFF, 0x88, - RF_TEST1_OFF, 0x31, + RF_TEST2_OFF, RF_TEST2_RX_LOW_DATA_RATE_MAGIC, + RF_TEST1_OFF, RF_TEST1_RX_LOW_DATA_RATE_MAGIC, RF_TEST0_OFF, 0x09, /* default sync values */ @@ -187,10 +238,16 @@ static __code uint8_t radio_setup[] = { RF_BSCFG_BS_POST_KI_PRE_KI| RF_BSCFG_BS_POST_KP_PRE_KP| RF_BSCFG_BS_LIMIT_0), - RF_AGCCTRL2_OFF, 0x03, - RF_AGCCTRL1_OFF, 0x40, - RF_AGCCTRL0_OFF, 0x91, - + RF_AGCCTRL2_OFF, (RF_AGCCTRL2_MAX_DVGA_GAIN_ALL| + RF_AGCCTRL2_MAX_LNA_GAIN_0| + RF_AGCCTRL2_MAGN_TARGET_33dB), + RF_AGCCTRL1_OFF, (RF_AGCCTRL1_AGC_LNA_PRIORITY_0 | + RF_AGCCTRL1_CARRIER_SENSE_REL_THR_DISABLE | + RF_AGCCTRL1_CARRIER_SENSE_ABS_THR_0DB), + RF_AGCCTRL0_OFF, (RF_AGCCTRL0_HYST_LEVEL_NONE | + RF_AGCCTRL0_WAIT_TIME_8 | + RF_AGCCTRL0_AGC_FREEZE_NORMAL | + RF_AGCCTRL0_FILTER_LENGTH_8), RF_IOCFG2_OFF, 0x00, RF_IOCFG1_OFF, 0x00, RF_IOCFG0_OFF, 0x00, @@ -198,7 +255,7 @@ static __code uint8_t radio_setup[] = { static __code uint8_t rdf_setup[] = { RF_MDMCFG4_OFF, ((CHANBW_E << RF_MDMCFG4_CHANBW_E_SHIFT) | - (CHANBW_M << RF_MDMCFG4_CHANBW_M_SHIFT) | + (CHANBW_M_384 << RF_MDMCFG4_CHANBW_M_SHIFT) | (RDF_DRATE_E << RF_MDMCFG4_DRATE_E_SHIFT)), RF_MDMCFG3_OFF, (RDF_DRATE_M << RF_MDMCFG3_DRATE_M_SHIFT), RF_MDMCFG2_OFF, (RF_MDMCFG2_DEM_DCFILT_OFF | @@ -212,26 +269,30 @@ static __code uint8_t rdf_setup[] = { (RDF_DEVIATION_M << RF_DEVIATN_DEVIATION_M_SHIFT)), /* packet length is set in-line */ - RF_PKTCTRL1_OFF, ((1 << PKTCTRL1_PQT_SHIFT)| + RF_PKTCTRL1_OFF, ((0 << PKTCTRL1_PQT_SHIFT)| PKTCTRL1_ADR_CHK_NONE), RF_PKTCTRL0_OFF, (RF_PKTCTRL0_PKT_FORMAT_NORMAL| RF_PKTCTRL0_LENGTH_CONFIG_FIXED), }; static __code uint8_t fixed_pkt_setup[] = { +#if !HAS_RADIO_RATE RF_MDMCFG4_OFF, ((CHANBW_E << RF_MDMCFG4_CHANBW_E_SHIFT) | - (CHANBW_M << RF_MDMCFG4_CHANBW_M_SHIFT) | - (DRATE_E << RF_MDMCFG4_DRATE_E_SHIFT)), + (CHANBW_M_384 << RF_MDMCFG4_CHANBW_M_SHIFT) | + (DRATE_E_384 << RF_MDMCFG4_DRATE_E_SHIFT)), +#endif RF_MDMCFG3_OFF, (DRATE_M << RF_MDMCFG3_DRATE_M_SHIFT), - RF_MDMCFG2_OFF, (RF_MDMCFG2_DEM_DCFILT_OFF | + RF_MDMCFG2_OFF, (RF_MDMCFG2_DEM_DCFILT_ON | RF_MDMCFG2_MOD_FORMAT_GFSK | - RF_MDMCFG2_SYNC_MODE_15_16_THRES), + RF_MDMCFG2_SYNC_MODE_15_16), RF_MDMCFG1_OFF, (RF_MDMCFG1_FEC_EN | RF_MDMCFG1_NUM_PREAMBLE_4 | (2 << RF_MDMCFG1_CHANSPC_E_SHIFT)), - RF_DEVIATN_OFF, ((DEVIATION_E << RF_DEVIATN_DEVIATION_E_SHIFT) | - (DEVIATION_M << RF_DEVIATN_DEVIATION_M_SHIFT)), +#if !HAS_RADIO_RATE + RF_DEVIATN_OFF, ((DEVIATION_E_384 << RF_DEVIATN_DEVIATION_E_SHIFT) | + (DEVIATION_M_384 << RF_DEVIATN_DEVIATION_M_SHIFT)), +#endif /* max packet length -- now set inline */ RF_PKTCTRL1_OFF, ((1 << PKTCTRL1_PQT_SHIFT)| @@ -243,6 +304,38 @@ static __code uint8_t fixed_pkt_setup[] = { RF_PKTCTRL0_LENGTH_CONFIG_FIXED), }; +#if HAS_RADIO_RATE +static __code struct { + uint8_t mdmcfg4; + uint8_t deviatn; +} packet_rate_setup[] = { + /* 38400 */ + { + ((CHANBW_E << RF_MDMCFG4_CHANBW_E_SHIFT) | + (CHANBW_M_384 << RF_MDMCFG4_CHANBW_M_SHIFT) | + (DRATE_E_384 << RF_MDMCFG4_DRATE_E_SHIFT)), + ((DEVIATION_E_384 << RF_DEVIATN_DEVIATION_E_SHIFT) | + (DEVIATION_M_384 << RF_DEVIATN_DEVIATION_M_SHIFT)), + }, + /* 9600 */ + { + ((CHANBW_E << RF_MDMCFG4_CHANBW_E_SHIFT) | + (CHANBW_M_96 << RF_MDMCFG4_CHANBW_M_SHIFT) | + (DRATE_E_96 << RF_MDMCFG4_DRATE_E_SHIFT)), + ((DEVIATION_E_96 << RF_DEVIATN_DEVIATION_E_SHIFT) | + (DEVIATION_M_96 << RF_DEVIATN_DEVIATION_M_SHIFT)), + }, + /* 2400 */ + { + ((CHANBW_E << RF_MDMCFG4_CHANBW_E_SHIFT) | + (CHANBW_M_24 << RF_MDMCFG4_CHANBW_M_SHIFT) | + (DRATE_E_24 << RF_MDMCFG4_DRATE_E_SHIFT)), + ((DEVIATION_E_24 << RF_DEVIATN_DEVIATION_E_SHIFT) | + (DEVIATION_M_24 << RF_DEVIATN_DEVIATION_M_SHIFT)), + }, +}; +#endif + __xdata uint8_t ao_radio_dma; __xdata uint8_t ao_radio_dma_done; __xdata uint8_t ao_radio_done; @@ -308,6 +401,10 @@ ao_radio_get(uint8_t len) RF_FREQ1 = (uint8_t) (ao_config.radio_setting >> 8); RF_FREQ0 = (uint8_t) (ao_config.radio_setting); RF_PKTLEN = len; +#if HAS_RADIO_RATE + RF_MDMCFG4 = packet_rate_setup[ao_config.radio_rate].mdmcfg4; + RF_DEVIATN = packet_rate_setup[ao_config.radio_rate].deviatn; +#endif } @@ -551,8 +648,31 @@ ao_radio_test_cmd(void) ao_radio_test(0); } +#if AO_RADIO_REG_TEST +static void +ao_radio_set_reg(void) +{ + uint8_t offset; + ao_cmd_hex(); + offset = ao_cmd_lex_i; + if (ao_cmd_status != ao_cmd_success) + return; + ao_cmd_hex(); + printf("RF[%x] %x", offset, RF[offset]); + if (ao_cmd_status == ao_cmd_success) { + RF[offset] = ao_cmd_lex_i; + printf (" -> %x", RF[offset]); + } + ao_cmd_status = ao_cmd_success; + printf("\n"); +} +#endif + __code struct ao_cmds ao_radio_cmds[] = { { ao_radio_test_cmd, "C <1 start, 0 stop, none both>\0Radio carrier test" }, +#if AO_RADIO_REG_TEST + { ao_radio_set_reg, "V <offset> <value>\0Set radio register" }, +#endif { 0, NULL }, }; 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