CC2520: Added offset to calculate correct RSSI value
Sumankumar Panchal
parent
6947fc7381
commit
25dea7264a
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@ -55,12 +55,19 @@
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#define FOOTER1_CRC_OK 0x80
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#define FOOTER1_CORRELATION 0x7f
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#ifdef CC2520_CONF_RSSI_OFFSET
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#define RSSI_OFFSET CC2520_CONF_RSSI_OFFSET
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#else /* CC2520_CONF_RSSI_OFFSET */
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/* The RSSI_OFFSET is approximate 76 (see CC2520 specification) */
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#define RSSI_OFFSET 76
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#endif /* CC2520_CONF_RSSI_OFFSET */
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#include <stdio.h>
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#define DEBUG 0
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...) do {} while (0)
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#define PRINTF(...) do {} while(0)
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#endif
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#if 0 && DEBUG
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@ -81,11 +88,11 @@ int cc2520_authority_level_of_sender;
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int cc2520_packets_seen, cc2520_packets_read;
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#define BUSYWAIT_UNTIL(cond, max_time) \
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do { \
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rtimer_clock_t t0; \
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t0 = RTIMER_NOW(); \
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while(!(cond) && RTIMER_CLOCK_LT(RTIMER_NOW(), t0 + (max_time))); \
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#define BUSYWAIT_UNTIL(cond, max_time) \
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do { \
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rtimer_clock_t t0; \
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t0 = RTIMER_NOW(); \
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while(!(cond) && RTIMER_CLOCK_LT(RTIMER_NOW(), t0 + (max_time))); \
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} while(0)
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volatile uint8_t cc2520_sfd_counter;
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@ -97,7 +104,6 @@ static volatile uint16_t last_packet_timestamp;
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PROCESS(cc2520_process, "CC2520 driver");
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/*---------------------------------------------------------------------------*/
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int cc2520_on(void);
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int cc2520_off(void);
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@ -141,7 +147,6 @@ get_value(radio_param_t param, radio_value_t *value)
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return RADIO_RESULT_NOT_SUPPORTED;
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}
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}
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static radio_result_t
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set_value(radio_param_t param, radio_value_t value)
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{
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@ -166,38 +171,35 @@ set_value(radio_param_t param, radio_value_t value)
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return RADIO_RESULT_NOT_SUPPORTED;
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}
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}
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static radio_result_t
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get_object(radio_param_t param, void *dest, size_t size)
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{
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return RADIO_RESULT_NOT_SUPPORTED;
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}
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static radio_result_t
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set_object(radio_param_t param, const void *src, size_t size)
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{
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return RADIO_RESULT_NOT_SUPPORTED;
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}
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const struct radio_driver cc2520_driver =
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{
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cc2520_init,
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cc2520_prepare,
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cc2520_transmit,
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cc2520_send,
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cc2520_read,
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/* cc2520_set_channel, */
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/* detected_energy, */
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cc2520_cca,
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cc2520_receiving_packet,
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pending_packet,
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cc2520_on,
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cc2520_off,
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get_value,
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set_value,
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get_object,
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set_object
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};
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{
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cc2520_init,
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cc2520_prepare,
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cc2520_transmit,
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cc2520_send,
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cc2520_read,
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/* cc2520_set_channel, */
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/* detected_energy, */
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cc2520_cca,
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cc2520_receiving_packet,
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pending_packet,
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cc2520_on,
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cc2520_off,
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get_value,
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set_value,
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get_object,
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set_object
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};
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/*---------------------------------------------------------------------------*/
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@ -269,7 +271,9 @@ off(void)
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}
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/*---------------------------------------------------------------------------*/
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#define GET_LOCK() locked++
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static void RELEASE_LOCK(void) {
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static void
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RELEASE_LOCK(void)
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{
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if(locked == 1) {
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if(lock_on) {
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on();
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@ -315,7 +319,7 @@ cc2520_init(void)
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{
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{
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int s = splhigh();
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cc2520_arch_init(); /* Initalize ports and SPI. */
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cc2520_arch_init(); /* Initalize ports and SPI. */
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CC2520_DISABLE_FIFOP_INT();
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CC2520_FIFOP_INT_INIT();
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splx(s);
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@ -339,57 +343,57 @@ cc2520_init(void)
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/* Change default values as recommended in the data sheet, */
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/* correlation threshold = 20, RX bandpass filter = 1.3uA.*/
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setreg(CC2520_TXCTRL, 0x94);
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setreg(CC2520_TXPOWER, 0x13); // Output power 1 dBm
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setreg(CC2520_TXCTRL, 0x94);
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setreg(CC2520_TXPOWER, 0x13); /* Output power 1 dBm */
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/*
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valeurs de TXPOWER
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0x03 -> -18 dBm
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0x2C -> -7 dBm
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0x88 -> -4 dBm
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0x81 -> -2 dBm
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0x32 -> 0 dBm
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0x13 -> 1 dBm
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0x32 -> 0 dBm
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0x13 -> 1 dBm
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0xAB -> 2 dBm
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0xF2 -> 3 dBm
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0xF7 -> 5 dBm
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*/
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setreg(CC2520_CCACTRL0, 0xF8); // CCA treshold -80dBm
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valeurs de TXPOWER
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0x03 -> -18 dBm
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0x2C -> -7 dBm
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0x88 -> -4 dBm
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0x81 -> -2 dBm
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0x32 -> 0 dBm
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0x13 -> 1 dBm
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0x32 -> 0 dBm
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0x13 -> 1 dBm
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0xAB -> 2 dBm
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0xF2 -> 3 dBm
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0xF7 -> 5 dBm
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*/
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setreg(CC2520_CCACTRL0, 0xF8); /* CCA treshold -80dBm */
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// Recommended RX settings
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setreg(CC2520_MDMCTRL0, 0x84); // Controls modem
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setreg(CC2520_MDMCTRL1, 0x14); // Controls modem
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setreg(CC2520_RXCTRL, 0x3F); // Adjust currents in RX related analog modules
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setreg(CC2520_FSCTRL, 0x5A); // Adjust currents in synthesizer.
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setreg(CC2520_FSCAL1, 0x2B); // Adjust currents in VCO
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setreg(CC2520_AGCCTRL1, 0x11); // Adjust target value for AGC control loop
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setreg(CC2520_AGCCTRL2, 0xEB);
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/* Recommended RX settings */
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setreg(CC2520_MDMCTRL0, 0x84); /* Controls modem */
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setreg(CC2520_MDMCTRL1, 0x14); /* Controls modem */
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setreg(CC2520_RXCTRL, 0x3F); /* Adjust currents in RX related analog modules */
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setreg(CC2520_FSCTRL, 0x5A); /* Adjust currents in synthesizer. */
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setreg(CC2520_FSCAL1, 0x2B); /* Adjust currents in VCO */
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setreg(CC2520_AGCCTRL1, 0x11); /* Adjust target value for AGC control loop */
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setreg(CC2520_AGCCTRL2, 0xEB);
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// Disable external clock
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setreg(CC2520_EXTCLOCK, 0x00);
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/* Disable external clock */
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setreg(CC2520_EXTCLOCK, 0x00);
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// Tune ADC performance
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setreg(CC2520_ADCTEST0, 0x10);
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setreg(CC2520_ADCTEST1, 0x0E);
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setreg(CC2520_ADCTEST2, 0x03);
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/* Tune ADC performance */
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setreg(CC2520_ADCTEST0, 0x10);
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setreg(CC2520_ADCTEST1, 0x0E);
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setreg(CC2520_ADCTEST2, 0x03);
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/* Set auto CRC on frame. */
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#if CC2520_CONF_AUTOACK
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setreg(CC2520_FRMCTRL0, AUTOCRC | AUTOACK);
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setreg(CC2520_FRMFILT0, FRAME_MAX_VERSION|FRAME_FILTER_ENABLE);
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setreg(CC2520_FRMCTRL0, AUTOCRC | AUTOACK);
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setreg(CC2520_FRMFILT0, FRAME_MAX_VERSION | FRAME_FILTER_ENABLE);
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#else
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/* setreg(CC2520_FRMCTRL0, 0x60); */
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setreg(CC2520_FRMCTRL0, AUTOCRC);
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setreg(CC2520_FRMCTRL0, AUTOCRC);
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/* Disable filter on @ (remove if you want to address specific wismote) */
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setreg(CC2520_FRMFILT0, 0x00);
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setreg(CC2520_FRMFILT0, 0x00);
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#endif /* CC2520_CONF_AUTOACK */
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/* SET_RXENMASK_ON_TX */
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setreg(CC2520_FRMCTRL1, 1);
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setreg(CC2520_FRMCTRL1, 1);
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/* Set FIFOP threshold to maximum .*/
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setreg(CC2520_FIFOPCTRL, FIFOP_THR(0x7F));
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setreg(CC2520_FIFOPCTRL, FIFOP_THR(0x7F));
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cc2520_set_pan_addr(0xffff, 0x0000, NULL);
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cc2520_set_channel(26);
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@ -430,7 +434,7 @@ cc2520_transmit(unsigned short payload_len)
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#if WITH_SEND_CCA
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strobe(CC2520_INS_SRXON);
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BUSYWAIT_UNTIL(status() & BV(CC2520_RSSI_VALID) , RTIMER_SECOND / 10);
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BUSYWAIT_UNTIL(status() & BV(CC2520_RSSI_VALID), RTIMER_SECOND / 10);
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strobe(CC2520_INS_STXONCCA);
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#else /* WITH_SEND_CCA */
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strobe(CC2520_INS_STXON);
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@ -457,24 +461,24 @@ cc2520_transmit(unsigned short payload_len)
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return RADIO_TX_COLLISION;
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}
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if(receive_on) {
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ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
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ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
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}
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ENERGEST_ON(ENERGEST_TYPE_TRANSMIT);
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/* We wait until transmission has ended so that we get an
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accurate measurement of the transmission time.*/
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//BUSYWAIT_UNTIL(getreg(CC2520_EXCFLAG0) & TX_FRM_DONE , RTIMER_SECOND / 100);
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accurate measurement of the transmission time.*/
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/* BUSYWAIT_UNTIL(getreg(CC2520_EXCFLAG0) & TX_FRM_DONE , RTIMER_SECOND / 100); */
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BUSYWAIT_UNTIL(!(status() & BV(CC2520_TX_ACTIVE)), RTIMER_SECOND / 10);
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#ifdef ENERGEST_CONF_LEVELDEVICE_LEVELS
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ENERGEST_OFF_LEVEL(ENERGEST_TYPE_TRANSMIT,cc2520_get_txpower());
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ENERGEST_OFF_LEVEL(ENERGEST_TYPE_TRANSMIT, cc2520_get_txpower());
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#endif
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ENERGEST_OFF(ENERGEST_TYPE_TRANSMIT);
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if(receive_on) {
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ENERGEST_ON(ENERGEST_TYPE_LISTEN);
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ENERGEST_ON(ENERGEST_TYPE_LISTEN);
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} else {
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/* We need to explicitly turn off the radio,
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* since STXON[CCA] -> TX_ACTIVE -> RX_ACTIVE */
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off();
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/* We need to explicitly turn off the radio,
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* since STXON[CCA] -> TX_ACTIVE -> RX_ACTIVE */
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off();
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}
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if(packetbuf_attr(PACKETBUF_ATTR_RADIO_TXPOWER) > 0) {
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@ -510,9 +514,9 @@ cc2520_prepare(const void *payload, unsigned short payload_len)
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PRINTF("cc2520: sending %d bytes\n", payload_len);
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/*int i;
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for(i = 0; i < payload_len;i++)
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printf("%x",((uint8_t *) payload)[i]);
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printf("\n");*/
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for(i = 0; i < payload_len;i++)
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printf("%x",((uint8_t *) payload)[i]);
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printf("\n");*/
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RIMESTATS_ADD(lltx);
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/* Wait for any previous transmission to finish. */
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@ -641,15 +645,14 @@ cc2520_set_pan_addr(unsigned pan,
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tmp[1] = pan >> 8;
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CC2520_WRITE_RAM(&tmp, CC2520RAM_PANID, 2);
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tmp[0] = addr & 0xff;
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tmp[1] = addr >> 8;
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CC2520_WRITE_RAM(&tmp, CC2520RAM_SHORTADDR, 2);
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if(ieee_addr != NULL) {
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int f;
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uint8_t tmp_addr[8];
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// LSB first, MSB last for 802.15.4 addresses in CC2520
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for (f = 0; f < 8; f++) {
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/* LSB first, MSB last for 802.15.4 addresses in CC2520 */
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for(f = 0; f < 8; f++) {
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tmp_addr[7 - f] = ieee_addr[f];
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}
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CC2520_WRITE_RAM(tmp_addr, CC2520RAM_IEEEADDR, 8);
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@ -737,15 +740,13 @@ cc2520_read(void *buf, unsigned short bufsize)
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getrxdata(footer, FOOTER_LEN);
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if(footer[1] & FOOTER1_CRC_OK) {
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cc2520_last_rssi = footer[0];
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cc2520_last_rssi = footer[0] - RSSI_OFFSET;
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cc2520_last_correlation = footer[1] & FOOTER1_CORRELATION;
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packetbuf_set_attr(PACKETBUF_ATTR_RSSI, cc2520_last_rssi);
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packetbuf_set_attr(PACKETBUF_ATTR_LINK_QUALITY, cc2520_last_correlation);
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RIMESTATS_ADD(llrx);
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} else {
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RIMESTATS_ADD(badcrc);
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len = FOOTER_LEN;
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@ -809,6 +810,7 @@ cc2520_rssi(void)
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BUSYWAIT_UNTIL(status() & BV(CC2520_RSSI_VALID), RTIMER_SECOND / 100);
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rssi = (int)((signed char)getreg(CC2520_RSSI));
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rssi -= RSSI_OFFSET;
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if(radio_was_off) {
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cc2520_off();
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@ -818,12 +820,12 @@ cc2520_rssi(void)
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}
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/*---------------------------------------------------------------------------*/
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/*
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static int
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detected_energy(void)
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{
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return cc2520_rssi();
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}
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*/
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static int
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detected_energy(void)
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{
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return cc2520_rssi();
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}
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*/
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/*---------------------------------------------------------------------------*/
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int
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cc2520_cca_valid(void)
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