CC2520: Added offset to calculate correct RSSI value
Sumankumar Panchal
parent
6947fc7381
commit
25dea7264a
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@ -55,6 +55,13 @@
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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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@ -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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@ -166,19 +171,16 @@ 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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@ -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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@ -340,7 +344,7 @@ cc2520_init(void)
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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_TXPOWER, 0x13); /* Output power 1 dBm */
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/*
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@ -357,21 +361,21 @@ cc2520_init(void)
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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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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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/* 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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/* Disable external clock */
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setreg(CC2520_EXTCLOCK, 0x00);
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// Tune ADC performance
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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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@ -462,7 +466,7 @@ cc2520_transmit(unsigned short payload_len)
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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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/* 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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@ -641,14 +645,13 @@ 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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/* 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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@ -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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