From e0ee2ac6bc68b73e13bf34fac3ffd4a3b79dce98 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Wed, 2 Jul 2014 22:34:48 -0700 Subject: [PATCH] altos: Add telemetry rate support to CC1120 driver This supports the new 2400 and 9600 baud rates Signed-off-by: Keith Packard --- src/drivers/ao_cc1120.c | 121 +++++++++++++++++++++++++++++++--------- 1 file changed, 94 insertions(+), 27 deletions(-) diff --git a/src/drivers/ao_cc1120.c b/src/drivers/ao_cc1120.c index 31225939..5d51fbcd 100644 --- a/src/drivers/ao_cc1120.c +++ b/src/drivers/ao_cc1120.c @@ -245,7 +245,7 @@ ao_radio_check_marc_status(void) { ao_radio_mcu_wake = 0; ao_radio_marc_status = ao_radio_get_marc_status(); - + /* Anyt other than 'tx/rx finished' means an error occurred */ if (ao_radio_marc_status & ~(CC1120_MARC_STATUS1_TX_FINISHED|CC1120_MARC_STATUS1_RX_FINISHED)) ao_radio_abort = 1; @@ -297,26 +297,47 @@ ao_radio_idle(void) #define PACKET_DEV_M 80 /* - * For our packet data, set the symbol rate to 38400 Baud + * For our packet data * * (2**20 + DATARATE_M) * 2 ** DATARATE_E * Rdata = -------------------------------------- * fosc * 2 ** 39 * + * Symbol rate 38400 Baud: * * DATARATE_M = 239914 * DATARATE_E = 9 + * CHANBW = 74.42 (round to 100) + * + * Symbol rate 9600 Baud: + * + * DATARATE_M = 239914 + * DATARATE_E = 7 + * CHANBW = 58.58 (round to 62.5) + * + * Symbol rate 2400 Baud: + * + * DATARATE_M = 239914 + * DATARATE_E = 5 + * CHANBW = 47.61 (round to 50) */ -#define PACKET_DRATE_E 9 + #define PACKET_DRATE_M 239914 +#define PACKET_DRATE_E_384 9 +#define PACKET_CHAN_BW_384 0x02 /* 200 / 2 = 100 */ + +#define PACKET_DRATE_E_96 7 +#define PACKET_CHAN_BW_96 0x42 /* 125 / 2 = 62.5 */ + +#define PACKET_DRATE_E_24 5 +#define PACKET_CHAN_BW_24 0x04 /* 200 / 4 = 50 */ + static const uint16_t packet_setup[] = { CC1120_DEVIATION_M, PACKET_DEV_M, CC1120_MODCFG_DEV_E, ((CC1120_MODCFG_DEV_E_MODEM_MODE_NORMAL << CC1120_MODCFG_DEV_E_MODEM_MODE) | (CC1120_MODCFG_DEV_E_MOD_FORMAT_2_GFSK << CC1120_MODCFG_DEV_E_MOD_FORMAT) | (PACKET_DEV_E << CC1120_MODCFG_DEV_E_DEV_E)), - CC1120_DRATE2, ((PACKET_DRATE_E << CC1120_DRATE2_DATARATE_E) | - (((PACKET_DRATE_M >> 16) & CC1120_DRATE2_DATARATE_M_19_16_MASK) << CC1120_DRATE2_DATARATE_M_19_16)), CC1120_DRATE1, ((PACKET_DRATE_M >> 8) & 0xff), CC1120_DRATE0, ((PACKET_DRATE_M >> 0) & 0xff), CC1120_PKT_CFG2, ((CC1120_PKT_CFG2_CCA_MODE_ALWAYS_CLEAR << CC1120_PKT_CFG2_CCA_MODE) | @@ -335,6 +356,27 @@ static const uint16_t packet_setup[] = { AO_CC1120_MARC_GPIO_IOCFG, CC1120_IOCFG_GPIO_CFG_MARC_MCU_WAKEUP, }; +static const uint16_t packet_setup_384[] = { + CC1120_DRATE2, ((PACKET_DRATE_E_384 << CC1120_DRATE2_DATARATE_E) | + (((PACKET_DRATE_M >> 16) & CC1120_DRATE2_DATARATE_M_19_16_MASK) << CC1120_DRATE2_DATARATE_M_19_16)), + CC1120_CHAN_BW, PACKET_CHAN_BW_384, + CC1120_PA_CFG0, 0x7b, +}; + +static const uint16_t packet_setup_96[] = { + CC1120_DRATE2, ((PACKET_DRATE_E_96 << CC1120_DRATE2_DATARATE_E) | + (((PACKET_DRATE_M >> 16) & CC1120_DRATE2_DATARATE_M_19_16_MASK) << CC1120_DRATE2_DATARATE_M_19_16)), + CC1120_CHAN_BW, PACKET_CHAN_BW_96, + CC1120_PA_CFG0, 0x7d, +}; + +static const uint16_t packet_setup_24[] = { + CC1120_DRATE2, ((PACKET_DRATE_E_24 << CC1120_DRATE2_DATARATE_E) | + (((PACKET_DRATE_M >> 16) & CC1120_DRATE2_DATARATE_M_19_16_MASK) << CC1120_DRATE2_DATARATE_M_19_16)), + CC1120_CHAN_BW, PACKET_CHAN_BW_24, + CC1120_PA_CFG0, 0x7e, +}; + static const uint16_t packet_tx_setup[] = { CC1120_PKT_CFG2, ((CC1120_PKT_CFG2_CCA_MODE_ALWAYS_CLEAR << CC1120_PKT_CFG2_CCA_MODE) | (CC1120_PKT_CFG2_PKT_FORMAT_NORMAL << CC1120_PKT_CFG2_PKT_FORMAT)), @@ -397,6 +439,7 @@ static const uint16_t rdf_setup[] = { (0 << CC1120_PKT_CFG0_UART_SWAP_EN)), CC1120_PREAMBLE_CFG1, ((CC1120_PREAMBLE_CFG1_NUM_PREAMBLE_NONE << CC1120_PREAMBLE_CFG1_NUM_PREAMBLE) | (CC1120_PREAMBLE_CFG1_PREAMBLE_WORD_AA << CC1120_PREAMBLE_CFG1_PREAMBLE_WORD)), + CC1120_PA_CFG0, 0x7e, }; /* @@ -443,6 +486,7 @@ static const uint16_t aprs_setup[] = { (0 << CC1120_PKT_CFG1_APPEND_STATUS)), CC1120_PREAMBLE_CFG1, ((CC1120_PREAMBLE_CFG1_NUM_PREAMBLE_NONE << CC1120_PREAMBLE_CFG1_NUM_PREAMBLE) | (CC1120_PREAMBLE_CFG1_PREAMBLE_WORD_AA << CC1120_PREAMBLE_CFG1_PREAMBLE_WORD)), + CC1120_PA_CFG0, 0x7d, }; /* @@ -505,24 +549,49 @@ static uint16_t ao_radio_mode; #define AO_RADIO_MODE_APRS_FINISH (AO_RADIO_MODE_BITS_APRS | AO_RADIO_MODE_BITS_FIXED | AO_RADIO_MODE_BITS_TX_FINISH) #define AO_RADIO_MODE_TEST (AO_RADIO_MODE_BITS_TEST | AO_RADIO_MODE_BITS_INFINITE | AO_RADIO_MODE_BITS_TX_BUF) +static void +_ao_radio_set_regs(const uint16_t *regs, int nreg) +{ + int i; + + for (i = 0; i < nreg; i++) { + ao_radio_reg_write(regs[0], regs[1]); + regs += 2; + } +} + +#define ao_radio_set_regs(setup) _ao_radio_set_regs(setup, (sizeof (setup) / sizeof(setup[0])) >> 1) + static void ao_radio_set_mode(uint16_t new_mode) { uint16_t changes; - unsigned int i; if (new_mode == ao_radio_mode) return; changes = new_mode & (~ao_radio_mode); - if (changes & AO_RADIO_MODE_BITS_PACKET) - for (i = 0; i < sizeof (packet_setup) / sizeof (packet_setup[0]); i += 2) - ao_radio_reg_write(packet_setup[i], packet_setup[i+1]); + + if (changes & AO_RADIO_MODE_BITS_PACKET) { + ao_radio_set_regs(packet_setup); + + switch (ao_config.radio_rate) { + default: + case AO_RADIO_RATE_38400: + ao_radio_set_regs(packet_setup_384); + break; + case AO_RADIO_RATE_9600: + ao_radio_set_regs(packet_setup_96); + break; + case AO_RADIO_RATE_2400: + ao_radio_set_regs(packet_setup_24); + break; + } + } if (changes & AO_RADIO_MODE_BITS_PACKET_TX) - for (i = 0; i < sizeof (packet_tx_setup) / sizeof (packet_tx_setup[0]); i += 2) - ao_radio_reg_write(packet_tx_setup[i], packet_tx_setup[i+1]); - + ao_radio_set_regs(packet_tx_setup); + if (changes & AO_RADIO_MODE_BITS_TX_BUF) ao_radio_reg_write(AO_CC1120_INT_GPIO_IOCFG, CC1120_IOCFG_GPIO_CFG_TXFIFO_THR); @@ -530,20 +599,16 @@ ao_radio_set_mode(uint16_t new_mode) ao_radio_reg_write(AO_CC1120_INT_GPIO_IOCFG, CC1120_IOCFG_GPIO_CFG_RX0TX1_CFG); if (changes & AO_RADIO_MODE_BITS_PACKET_RX) - for (i = 0; i < sizeof (packet_rx_setup) / sizeof (packet_rx_setup[0]); i += 2) - ao_radio_reg_write(packet_rx_setup[i], packet_rx_setup[i+1]); - + ao_radio_set_regs(packet_rx_setup); + if (changes & AO_RADIO_MODE_BITS_RDF) - for (i = 0; i < sizeof (rdf_setup) / sizeof (rdf_setup[0]); i += 2) - ao_radio_reg_write(rdf_setup[i], rdf_setup[i+1]); + ao_radio_set_regs(rdf_setup); if (changes & AO_RADIO_MODE_BITS_APRS) - for (i = 0; i < sizeof (aprs_setup) / sizeof (aprs_setup[0]); i += 2) - ao_radio_reg_write(aprs_setup[i], aprs_setup[i+1]); + ao_radio_set_regs(aprs_setup); if (changes & AO_RADIO_MODE_BITS_TEST) - for (i = 0; i < sizeof (test_setup) / sizeof (test_setup[0]); i += 2) - ao_radio_reg_write(test_setup[i], test_setup[i+1]); + ao_radio_set_regs(test_setup); if (changes & AO_RADIO_MODE_BITS_INFINITE) ao_radio_reg_write(CC1120_PKT_CFG0, AO_PKT_CFG0_INFINITE); @@ -563,12 +628,9 @@ static uint8_t ao_radio_configured = 0; static void ao_radio_setup(void) { - unsigned int i; - ao_radio_strobe(CC1120_SRES); - for (i = 0; i < sizeof (radio_setup) / sizeof (radio_setup[0]); i += 2) - ao_radio_reg_write(radio_setup[i], radio_setup[i+1]); + ao_radio_set_regs(radio_setup); ao_radio_mode = 0; @@ -592,6 +654,7 @@ static void ao_radio_get(uint8_t len) { static uint32_t last_radio_setting; + static uint8_t last_radio_rate; ao_mutex_get(&ao_radio_mutex); @@ -603,6 +666,10 @@ ao_radio_get(uint8_t len) ao_radio_reg_write(CC1120_FREQ0, ao_config.radio_setting); last_radio_setting = ao_config.radio_setting; } + if (ao_config.radio_rate != last_radio_rate) { + ao_radio_mode &= ~AO_RADIO_MODE_BITS_PACKET; + last_radio_rate = ao_config.radio_rate; + } ao_radio_set_len(len); } @@ -696,7 +763,7 @@ ao_radio_test_cmd(void) ao_radio_set_mode(AO_RADIO_MODE_TEST); ao_radio_strobe(CC1120_STX); #if CC1120_TRACE - { int t; + { int t; for (t = 0; t < 10; t++) { printf ("status: %02x\n", ao_radio_status()); ao_delay(AO_MS_TO_TICKS(100)); @@ -793,7 +860,7 @@ ao_radio_send(const void *d, uint8_t size) } else { ao_exti_enable(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN); } - + fifo_space = ao_radio_wait_tx(encode_len != 0); if (ao_radio_abort) { ao_radio_idle(); -- 2.30.2