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Diffstat (limited to 'src/cc1111/ao_radio.c')
| -rw-r--r-- | src/cc1111/ao_radio.c | 475 |
1 files changed, 475 insertions, 0 deletions
diff --git a/src/cc1111/ao_radio.c b/src/cc1111/ao_radio.c new file mode 100644 index 00000000..00816b33 --- /dev/null +++ b/src/cc1111/ao_radio.c @@ -0,0 +1,475 @@ +/* + * Copyright © 2009 Keith Packard <keithp@keithp.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ + +#include "ao.h" + +/* Values from SmartRF® Studio for: + * + * Deviation: 20.507812 kHz + * Datarate: 38.360596 kBaud + * Modulation: GFSK + * RF Freq: 434.549927 MHz + * Channel: 99.975586 kHz + * Channel: 0 + * RX filter: 93.75 kHz + */ + +/* + * For IF freq of 140.62kHz, the IF value is: + * + * 140.62e3 / (24e6 / 2**10) = 6 + */ + +#define IF_FREQ_CONTROL 6 + +/* + * For channel bandwidth of 93.75 kHz, the CHANBW_E and CHANBW_M values are + * + * BW = 24e6 / (8 * (4 + M) * 2 ** E) + * + * So, M = 0 and E = 3 + */ + +#define CHANBW_M 0 +#define CHANBW_E 3 + +/* + * For a symbol rate of 38360kBaud, the DRATE_E and DRATE_M values are: + * + * R = (256 + M) * 2** E * 24e6 / 2**28 + * + * So M is 163 and E is 10 + */ + +#define DRATE_E 10 +#define DRATE_M 163 + +/* + * 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 + */ + +#define DEVIATION_M 6 +#define DEVIATION_E 3 + +/* + * For our RDF beacon, set the symbol rate to 2kBaud (for a 1kHz tone), + * so the DRATE_E and DRATE_M values are: + * + * M is 94 and E is 6 + * + * To make the tone last for 200ms, we need 2000 * .2 = 400 bits or 50 bytes + */ + +#define RDF_DRATE_E 6 +#define RDF_DRATE_M 94 +#define RDF_PACKET_LEN 50 + +/* + * RDF deviation should match the normal NFM value of 5kHz + * + * M is 6 and E is 1 + * + */ + +#define RDF_DEVIATION_M 6 +#define RDF_DEVIATION_E 1 + +/* This are from the table for 433MHz */ + +#define RF_POWER_M30_DBM 0x12 +#define RF_POWER_M20_DBM 0x0e +#define RF_POWER_M15_DBM 0x1d +#define RF_POWER_M10_DBM 0x34 +#define RF_POWER_M5_DBM 0x2c +#define RF_POWER_0_DBM 0x60 +#define RF_POWER_5_DBM 0x84 +#define RF_POWER_7_DBM 0xc8 +#define RF_POWER_10_DBM 0xc0 + +#define RF_POWER RF_POWER_10_DBM + +static __code uint8_t radio_setup[] = { + RF_PA_TABLE7_OFF, RF_POWER, + RF_PA_TABLE6_OFF, RF_POWER, + RF_PA_TABLE5_OFF, RF_POWER, + RF_PA_TABLE4_OFF, RF_POWER, + RF_PA_TABLE3_OFF, RF_POWER, + RF_PA_TABLE2_OFF, RF_POWER, + RF_PA_TABLE1_OFF, RF_POWER, + RF_PA_TABLE0_OFF, RF_POWER, + + 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_MOD_FORMAT_GFSK | + RF_MDMCFG2_SYNC_MODE_15_16_THRES), + RF_MDMCFG1_OFF, (RF_MDMCFG1_FEC_EN | + RF_MDMCFG1_NUM_PREAMBLE_4 | + (2 << RF_MDMCFG1_CHANSPC_E_SHIFT)), + RF_MDMCFG0_OFF, (17 << RF_MDMCFG0_CHANSPC_M_SHIFT), + + 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 + */ + RF_FREND0_OFF, ((1 << RF_FREND0_LODIV_BUF_CURRENT_TX_SHIFT) | + (0 << RF_FREND0_PA_POWER_SHIFT)), + + RF_FREND1_OFF, ((1 << RF_FREND1_LNA_CURRENT_SHIFT) | + (1 << RF_FREND1_LNA2MIX_CURRENT_SHIFT) | + (1 << RF_FREND1_LODIV_BUF_CURRENT_RX_SHIFT) | + (2 << RF_FREND1_MIX_CURRENT_SHIFT)), + + RF_FSCAL3_OFF, 0xE9, + RF_FSCAL2_OFF, 0x0A, + RF_FSCAL1_OFF, 0x00, + RF_FSCAL0_OFF, 0x1F, + + RF_TEST2_OFF, 0x88, + RF_TEST1_OFF, 0x31, + RF_TEST0_OFF, 0x09, + + /* default sync values */ + RF_SYNC1_OFF, 0xD3, + RF_SYNC0_OFF, 0x91, + + /* max packet length */ + RF_PKTCTRL1_OFF, ((1 << PKTCTRL1_PQT_SHIFT)| + PKTCTRL1_APPEND_STATUS| + PKTCTRL1_ADR_CHK_NONE), + RF_PKTCTRL0_OFF, (RF_PKTCTRL0_WHITE_DATA| + RF_PKTCTRL0_PKT_FORMAT_NORMAL| + RF_PKTCTRL0_CRC_EN| + RF_PKTCTRL0_LENGTH_CONFIG_FIXED), + RF_ADDR_OFF, 0x00, + RF_MCSM2_OFF, (RF_MCSM2_RX_TIME_END_OF_PACKET), + RF_MCSM1_OFF, (RF_MCSM1_CCA_MODE_RSSI_BELOW_UNLESS_RECEIVING| + RF_MCSM1_RXOFF_MODE_IDLE| + RF_MCSM1_TXOFF_MODE_IDLE), + RF_MCSM0_OFF, (RF_MCSM0_FS_AUTOCAL_FROM_IDLE| + RF_MCSM0_MAGIC_3| + RF_MCSM0_CLOSE_IN_RX_0DB), + RF_FOCCFG_OFF, (RF_FOCCFG_FOC_PRE_K_3K, + RF_FOCCFG_FOC_POST_K_PRE_K, + RF_FOCCFG_FOC_LIMIT_BW_OVER_4), + RF_BSCFG_OFF, (RF_BSCFG_BS_PRE_K_2K| + RF_BSCFG_BS_PRE_KP_3KP| + RF_BSCFG_BS_POST_KI_PRE_KI| + RF_BSCFG_BS_POST_KP_PRE_KP| + RF_BSCFG_BS_LIMIT_0), + RF_AGCCTRL2_OFF, 0x43, + RF_AGCCTRL1_OFF, 0x40, + RF_AGCCTRL0_OFF, 0x91, + + RF_IOCFG2_OFF, 0x00, + RF_IOCFG1_OFF, 0x00, + RF_IOCFG0_OFF, 0x00, +}; + +static __code uint8_t rdf_setup[] = { + RF_MDMCFG4_OFF, ((CHANBW_E << RF_MDMCFG4_CHANBW_E_SHIFT) | + (CHANBW_M << 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 | + RF_MDMCFG2_MOD_FORMAT_GFSK | + RF_MDMCFG2_SYNC_MODE_15_16_THRES), + RF_MDMCFG1_OFF, (RF_MDMCFG1_FEC_DIS | + RF_MDMCFG1_NUM_PREAMBLE_2 | + (2 << RF_MDMCFG1_CHANSPC_E_SHIFT)), + + RF_DEVIATN_OFF, ((RDF_DEVIATION_E << RF_DEVIATN_DEVIATION_E_SHIFT) | + (RDF_DEVIATION_M << RF_DEVIATN_DEVIATION_M_SHIFT)), + + /* packet length is set in-line */ + RF_PKTCTRL1_OFF, ((1 << 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[] = { + 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_MOD_FORMAT_GFSK | + RF_MDMCFG2_SYNC_MODE_15_16_THRES), + 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)), + + /* max packet length -- now set inline */ + RF_PKTCTRL1_OFF, ((1 << PKTCTRL1_PQT_SHIFT)| + PKTCTRL1_APPEND_STATUS| + PKTCTRL1_ADR_CHK_NONE), + RF_PKTCTRL0_OFF, (RF_PKTCTRL0_WHITE_DATA| + RF_PKTCTRL0_PKT_FORMAT_NORMAL| + RF_PKTCTRL0_CRC_EN| + RF_PKTCTRL0_LENGTH_CONFIG_FIXED), +}; + +__xdata uint8_t ao_radio_dma; +__xdata uint8_t ao_radio_dma_done; +__xdata uint8_t ao_radio_done; +__xdata uint8_t ao_radio_abort; +__xdata uint8_t ao_radio_mutex; + +void +ao_radio_general_isr(void) __interrupt 16 +{ + S1CON &= ~0x03; + if (RFIF & RFIF_IM_TIMEOUT) { + ao_radio_recv_abort(); + RFIF &= ~ RFIF_IM_TIMEOUT; + } else if (RFIF & RFIF_IM_DONE) { + ao_radio_done = 1; + ao_wakeup(&ao_radio_done); + RFIF &= ~RFIF_IM_DONE; + } +} + +void +ao_radio_set_packet(void) +{ + uint8_t i; + for (i = 0; i < sizeof (fixed_pkt_setup); i += 2) + RF[fixed_pkt_setup[i]] = fixed_pkt_setup[i+1]; +} + +void +ao_radio_idle(void) +{ + if (RF_MARCSTATE != RF_MARCSTATE_IDLE) + { + do { + RFST = RFST_SIDLE; + ao_yield(); + } while (RF_MARCSTATE != RF_MARCSTATE_IDLE); + } +} + +void +ao_radio_get(uint8_t len) +{ + ao_config_get(); + ao_mutex_get(&ao_radio_mutex); + ao_radio_idle(); + RF_CHANNR = ao_config.radio_channel; + RF_FREQ2 = (uint8_t) (ao_config.radio_setting >> 16); + RF_FREQ1 = (uint8_t) (ao_config.radio_setting >> 8); + RF_FREQ0 = (uint8_t) (ao_config.radio_setting); + RF_PKTLEN = len; +} + + +void +ao_radio_send(__xdata void *packet, uint8_t size) __reentrant +{ + ao_radio_get(size); + ao_radio_done = 0; + ao_dma_set_transfer(ao_radio_dma, + packet, + &RFDXADDR, + size, + DMA_CFG0_WORDSIZE_8 | + DMA_CFG0_TMODE_SINGLE | + DMA_CFG0_TRIGGER_RADIO, + DMA_CFG1_SRCINC_1 | + DMA_CFG1_DESTINC_0 | + DMA_CFG1_PRIORITY_HIGH); + ao_dma_start(ao_radio_dma); + RFST = RFST_STX; + __critical while (!ao_radio_done) + ao_sleep(&ao_radio_done); + ao_radio_put(); +} + +uint8_t +ao_radio_recv(__xdata void *packet, uint8_t size) __reentrant +{ + ao_radio_abort = 0; + ao_radio_get(size - 2); + ao_dma_set_transfer(ao_radio_dma, + &RFDXADDR, + packet, + size, + DMA_CFG0_WORDSIZE_8 | + DMA_CFG0_TMODE_SINGLE | + DMA_CFG0_TRIGGER_RADIO, + DMA_CFG1_SRCINC_0 | + DMA_CFG1_DESTINC_1 | + DMA_CFG1_PRIORITY_HIGH); + ao_dma_start(ao_radio_dma); + RFST = RFST_SRX; + + /* Wait for DMA to be done, for the radio receive process to + * get aborted or for a receive timeout to fire + */ + __critical while (!ao_radio_dma_done && !ao_radio_abort) + if (ao_sleep(&ao_radio_dma_done)) + break; + + /* If recv was aborted, clean up by stopping the DMA engine + * and idling the radio + */ + if (!ao_radio_dma_done) { + ao_dma_abort(ao_radio_dma); + ao_radio_idle(); + } + ao_radio_put(); + return ao_radio_dma_done; +} + +/* + * Wake up a task waiting to receive a radio packet + * and tell them to abort the transfer + */ + +void +ao_radio_recv_abort(void) +{ + ao_radio_abort = 1; + ao_wakeup(&ao_radio_dma_done); +} + +__xdata ao_radio_rdf_value = 0x55; + +void +ao_radio_rdf(int ms) +{ + uint8_t i; + uint8_t pkt_len; + + /* + * Compute the packet length as follows: + * + * 2000 bps (for a 1kHz tone) + * so, for 'ms' milliseconds, we need + * 2 * ms bits, or ms / 4 bytes + */ + if (ms > (255 * 4)) + ms = 255 * 4; + pkt_len = ms >> 2; + + ao_radio_abort = 0; + ao_radio_get(pkt_len); + ao_radio_done = 0; + for (i = 0; i < sizeof (rdf_setup); i += 2) + RF[rdf_setup[i]] = rdf_setup[i+1]; + + ao_dma_set_transfer(ao_radio_dma, + &ao_radio_rdf_value, + &RFDXADDR, + pkt_len, + DMA_CFG0_WORDSIZE_8 | + DMA_CFG0_TMODE_SINGLE | + DMA_CFG0_TRIGGER_RADIO, + DMA_CFG1_SRCINC_0 | + DMA_CFG1_DESTINC_0 | + DMA_CFG1_PRIORITY_HIGH); + ao_dma_start(ao_radio_dma); + RFST = RFST_STX; + __critical while (!ao_radio_done && !ao_radio_abort) + ao_sleep(&ao_radio_done); + if (!ao_radio_done) { + ao_dma_abort(ao_radio_dma); + ao_radio_idle(); + } + ao_radio_set_packet(); + ao_radio_put(); +} + +void +ao_radio_rdf_abort(void) +{ + ao_radio_abort = 1; + ao_wakeup(&ao_radio_done); +} + + +/* Output carrier */ +void +ao_radio_test(void) +{ + uint8_t mode = 2; + static __xdata radio_on; + ao_cmd_white(); + if (ao_cmd_lex_c != '\n') { + ao_cmd_decimal(); + mode = (uint8_t) ao_cmd_lex_u32; + } + mode++; + if ((mode & 2) && !radio_on) { +#if HAS_MONITOR + ao_set_monitor(0); +#endif +#if PACKET_HAS_SLAVE + ao_packet_slave_stop(); +#endif + ao_radio_get(0xff); + RFST = RFST_STX; + radio_on = 1; + } + if (mode == 3) { + printf ("Hit a character to stop..."); flush(); + getchar(); + putchar('\n'); + } + if ((mode & 1) && radio_on) { + ao_radio_idle(); + ao_radio_put(); + radio_on = 0; + } +} + +__code struct ao_cmds ao_radio_cmds[] = { + { ao_radio_test, "C <1 start, 0 stop, none both>\0Radio carrier test" }, + { 0, NULL }, +}; + +void +ao_radio_init(void) +{ + uint8_t i; + for (i = 0; i < sizeof (radio_setup); i += 2) + RF[radio_setup[i]] = radio_setup[i+1]; + ao_radio_set_packet(); + ao_radio_dma_done = 1; + ao_radio_dma = ao_dma_alloc(&ao_radio_dma_done); + RFIF = 0; + RFIM = RFIM_IM_TIMEOUT|RFIM_IM_DONE; + IEN2 |= IEN2_RFIE; + ao_cmd_register(&ao_radio_cmds[0]); +} |