diff options
| -rw-r--r-- | src/cc1111/ao_pins.h | 3 | ||||
| -rw-r--r-- | src/cc1111/ao_radio.c | 86 |
2 files changed, 80 insertions, 9 deletions
diff --git a/src/cc1111/ao_pins.h b/src/cc1111/ao_pins.h index 2d524188..83a3c774 100644 --- a/src/cc1111/ao_pins.h +++ b/src/cc1111/ao_pins.h @@ -57,6 +57,7 @@ #define HAS_IGNITE 1 #define HAS_MONITOR 0 #define HAS_TELEMETRY 1 + #define HAS_RADIO_RATE 0 /* not enough space for this */ #endif #if defined(TELEMETRUM_V_1_1) @@ -98,6 +99,7 @@ #define HAS_IGNITE 1 #define HAS_MONITOR 0 #define HAS_TELEMETRY 1 + #define HAS_RADIO_RATE 0 /* not enough space for this */ #endif #if defined(TELEMETRUM_V_1_2) @@ -139,6 +141,7 @@ #define HAS_IGNITE 1 #define HAS_MONITOR 0 #define HAS_TELEMETRY 1 + #define HAS_RADIO_RATE 0 /* not enough space for this */ #endif #if defined(TELEDONGLE_V_0_2) diff --git a/src/cc1111/ao_radio.c b/src/cc1111/ao_radio.c index fbdf7762..8f519958 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 + * + * 20.5 kHz deviation, 9.6kbps signal + * + * m = 41 / 9.6, which is < 5.5: + * + * bw = 2.6 * 20.5 + 0.55 * 9.6 = 58.58kHz + * + * M = 2, E = 3, bw = 62.5kHz + * + * 20.5kHz deviation, 2.4kbps signal + * + * m = 41 / 2.4, which is > 5.5: + * + * bw = 2.1 * 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 2 +#define CHANBW_M_24 3 #define CHANBW_E 3 /* @@ -55,12 +93,23 @@ * * 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: * @@ -122,9 +171,6 @@ 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_ON | RF_MDMCFG2_MOD_FORMAT_GFSK | @@ -204,7 +250,7 @@ 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 | @@ -225,9 +271,11 @@ static __code uint8_t rdf_setup[] = { }; 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_ON | RF_MDMCFG2_MOD_FORMAT_GFSK | @@ -249,6 +297,23 @@ static __code uint8_t fixed_pkt_setup[] = { RF_PKTCTRL0_LENGTH_CONFIG_FIXED), }; +#if HAS_RADIO_RATE +static __code uint8_t 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)), + /* 9600 */ + ((CHANBW_E << RF_MDMCFG4_CHANBW_E_SHIFT) | + (CHANBW_M_96 << RF_MDMCFG4_CHANBW_M_SHIFT) | + (DRATE_E_96 << RF_MDMCFG4_DRATE_E_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)), +}; +#endif + __xdata uint8_t ao_radio_dma; __xdata uint8_t ao_radio_dma_done; __xdata uint8_t ao_radio_done; @@ -314,6 +379,9 @@ 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]; +#endif } |