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cc26xx: change CCA logic to be standard-compatible; change receiving_packet to return true iff sync (SFD) has been seen

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This commit is contained in:
Atis Elsts 2016-04-25 19:31:04 +03:00
parent d85667d535
commit e233c3f27f
1 changed files with 15 additions and 10 deletions
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25
cpu/cc26xx-cc13xx/rf-core/ieee-mode.c
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@ -146,6 +146,13 @@ static uint8_t rf_stats[16] = { 0 };
#define RF_CMD_CCA_REQ_CCA_STATE_IDLE 0 /* 00 */
#define RF_CMD_CCA_REQ_CCA_STATE_BUSY 1 /* 01 */
#define RF_CMD_CCA_REQ_CCA_STATE_INVALID 2 /* 10 */
#define RF_CMD_CCA_REQ_CCA_CORR_IDLE (0 << 4)
#define RF_CMD_CCA_REQ_CCA_CORR_BUSY (1 << 4)
#define RF_CMD_CCA_REQ_CCA_CORR_INVALID (3 << 4)
#define RF_CMD_CCA_REQ_CCA_CORR_MASK (3 << 4)
#define RF_CMD_CCA_REQ_CCA_SYNC_BUSY (1 << 6)
/*---------------------------------------------------------------------------*/
#define IEEE_MODE_CHANNEL_MIN 11
#define IEEE_MODE_CHANNEL_MAX 26
@ -617,9 +624,9 @@ init_rf_params(void)
/* Configure CCA settings */
cmd->ccaOpt.ccaEnEnergy = 1;
cmd->ccaOpt.ccaEnCorr = 1;
cmd->ccaOpt.ccaEnSync = 0;
cmd->ccaOpt.ccaEnSync = 1;
cmd->ccaOpt.ccaCorrOp = 1;
cmd->ccaOpt.ccaSyncOp = 1;
cmd->ccaOpt.ccaSyncOp = 0;
cmd->ccaOpt.ccaCorrThr = 3;
cmd->ccaRssiThr = IEEE_MODE_RSSI_THRESHOLD;
@ -1167,19 +1174,17 @@ receiving_packet(void)
cca_info = get_cca_info();
/* If we can't read CCA info, return "not receiving" */
if(cca_info == RF_GET_CCA_INFO_ERROR) {
/* If we can't read CCA info, return "not receiving" */
ret = 0;
} else {
/* Return 1 (receiving) if ccaState is busy */
ret = (cca_info & 0x03) == RF_CMD_CCA_REQ_CCA_STATE_BUSY;
return 0;
}
if(was_off) {
off();
/* If sync has been seen, return 1 (receiving) */
if(cca_info & RF_CMD_CCA_REQ_CCA_SYNC_BUSY) {
return 1;
}
return ret;
return 0;
}
/*---------------------------------------------------------------------------*/
static int