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use MAC timer instead of SFD interrupt

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This commit is contained in:
thomas-ha 2016-03-23 09:08:54 +01:00
parent fb6e6d9ea3
commit a4f575b8f0
1 changed files with 45 additions and 20 deletions
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61
cpu/cc2538/dev/cc2538-rf.c
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@ -120,16 +120,15 @@ static const uint8_t magic[] = { 0x53, 0x6E, 0x69, 0x66 }; /** Snif */
#define CC2538_RF_AUTOACK 1
#endif
/*---------------------------------------------------------------------------*/
#if CC2538_RF_CONF_SFD_TIMESTAMPS
static rtimer_clock_t volatile cc2538_sfd_rtime;
#endif
/* Are we currently in poll mode? Disabled by default */
static uint8_t volatile poll_mode = 0;
/* Do we perform a CCA before sending? Enabled by default. */
static uint8_t send_on_cca = 1;
static int8_t rssi;
static uint8_t crc_corr;
void mac_timer_init(void);
uint32_t get_sfd_timestamp(void);
/*---------------------------------------------------------------------------*/
static uint8_t rf_flags;
static uint8_t rf_channel = CC2538_RF_CHANNEL;
@ -347,13 +346,14 @@ set_poll_mode(uint8_t enable)
if(enable) {
REG(RFCORE_XREG_RFIRQM0) &= ~RFCORE_XREG_RFIRQM0_FIFOP; // mask out FIFOP interrupt source
REG(RFCORE_SFR_RFIRQF0) &= ~RFCORE_SFR_RFIRQF0_FIFOP; // clear pending FIFOP interrupt
REG(RFCORE_XREG_RFIRQM0) |= RFCORE_XREG_RFIRQM0_SFD; // enable SFD interrupt source
REG(RFCORE_XREG_RFIRQM0) &= ~RFCORE_XREG_RFIRQM0_SFD; // disable SFD interrupt source
nvic_interrupt_disable(NVIC_INT_RF_RXTX);
} else {
REG(RFCORE_XREG_RFIRQM0) |= RFCORE_XREG_RFIRQM0_FIFOP; // enable FIFOP interrupt source
REG(RFCORE_XREG_RFIRQM0) &= ~RFCORE_XREG_RFIRQM0_SFD; // mask out SFD interrupt source
REG(RFCORE_SFR_RFIRQF0) &= ~RFCORE_SFR_RFIRQF0_SFD; // clear pending SFD interrupt
}
nvic_interrupt_enable(NVIC_INT_RF_RXTX); // enable RF interrupts
}
}
/*---------------------------------------------------------------------------*/
static void
@ -521,6 +521,8 @@ init(void)
udma_set_channel_src(CC2538_RF_CONF_RX_DMA_CHAN, RFCORE_SFR_RFDATA);
}
mac_timer_init();
set_poll_mode(poll_mode);
process_start(&cc2538_rf_process, NULL);
@ -956,15 +958,11 @@ get_object(radio_param_t param, void *dest, size_t size)
}
if(param == RADIO_PARAM_LAST_PACKET_TIMESTAMP) {
#if CC2538_RF_CONF_SFD_TIMESTAMPS
if(size != sizeof(rtimer_clock_t) || !dest) {
return RADIO_RESULT_INVALID_VALUE;
}
*(rtimer_clock_t*)dest = cc2538_sfd_rtime;
return RADIO_RESULT_OK;
#else
return RADIO_RESULT_NOT_SUPPORTED;
#endif
}
return RADIO_RESULT_NOT_SUPPORTED;
@ -1071,14 +1069,6 @@ cc2538_rf_rx_tx_isr(void)
{
ENERGEST_ON(ENERGEST_TYPE_IRQ);
#if CC2538_RF_CONF_SFD_TIMESTAMPS
if(poll_mode) {
if(REG(RFCORE_XREG_FSMSTAT1) & RFCORE_XREG_FSMSTAT1_RX_ACTIVE) {
cc2538_sfd_rtime = RTIMER_NOW();
}
}
#endif
if(!poll_mode) {
process_poll(&cc2538_rf_process);
}
@ -1130,4 +1120,39 @@ cc2538_rf_set_promiscous_mode(char p)
set_frame_filtering(p);
}
/*---------------------------------------------------------------------------*/
uint32_t get_sfd_timestamp(void)
{
uint32_t sfd, timer_val;
REG(RFCORE_SFR_MTMSEL) = (REG(RFCORE_SFR_MTMSEL) & ~RFCORE_SFR_MTMSEL_MTMSEL) | 0x00000000;
REG(RFCORE_SFR_MTCTRL) |= RFCORE_SFR_MTCTRL_LATCH_MODE;
timer_val = REG(RFCORE_SFR_MTM0) & RFCORE_SFR_MTM0_MTM0;
timer_val |= ((REG(RFCORE_SFR_MTM1) & RFCORE_SFR_MTM1_MTM1) << 8);
REG(RFCORE_SFR_MTMSEL) = (REG(RFCORE_SFR_MTMSEL) & ~RFCORE_SFR_MTMSEL_MTMOVFSEL) | 0x00000000;
timer_val |= ((REG(RFCORE_SFR_MTMOVF0) & RFCORE_SFR_MTMOVF0_MTMOVF0) << 16);
timer_val |= ((REG(RFCORE_SFR_MTMOVF1) & RFCORE_SFR_MTMOVF1_MTMOVF1) << 24);
REG(RFCORE_SFR_MTMSEL) = (REG(RFCORE_SFR_MTMSEL) & ~RFCORE_SFR_MTMSEL_MTMSEL) | 0x00000001;
REG(RFCORE_SFR_MTCTRL) |= RFCORE_SFR_MTCTRL_LATCH_MODE;
sfd = REG(RFCORE_SFR_MTM0) & RFCORE_SFR_MTM0_MTM0;
sfd |= ((REG(RFCORE_SFR_MTM1) & RFCORE_SFR_MTM1_MTM1) << 8);
REG(RFCORE_SFR_MTMSEL) = (REG(RFCORE_SFR_MTMSEL) & ~RFCORE_SFR_MTMSEL_MTMOVFSEL) | 0x00000010;
sfd |= ((REG(RFCORE_SFR_MTMOVF0) & RFCORE_SFR_MTMOVF0_MTMOVF0) << 16);
sfd |= ((REG(RFCORE_SFR_MTMOVF1) & RFCORE_SFR_MTMOVF1_MTMOVF1) << 24);
return (RTIMER_NOW() - RADIO_TO_RTIMER(timer_val - sfd));
}
/*---------------------------------------------------------------------------*/
void mac_timer_init(void)
{
CLOCK_STABLE();
REG(RFCORE_SFR_MTCTRL) |= RFCORE_SFR_MTCTRL_SYNC;
REG(RFCORE_SFR_MTCTRL) |= RFCORE_SFR_MTCTRL_RUN;
while(!(REG(RFCORE_SFR_MTCTRL) & RFCORE_SFR_MTCTRL_STATE));
REG(RFCORE_SFR_MTCTRL) &= ~RFCORE_SFR_MTCTRL_RUN;
while(REG(RFCORE_SFR_MTCTRL) & RFCORE_SFR_MTCTRL_STATE);
REG(RFCORE_SFR_MTCTRL) |= (RFCORE_SFR_MTCTRL_RUN | RFCORE_SFR_MTCTRL_SYNC);
while(!(REG(RFCORE_SFR_MTCTRL) & RFCORE_SFR_MTCTRL_STATE));
}
/*---------------------------------------------------------------------------*/
/** @} */