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cc2538-rf: More compact implementation of getting RSSIs

This commit is contained in:
kkrentz 2018-08-02 02:16:13 -07:00
parent 34997f60f6
commit 9c1fefa7a7
1 changed files with 6 additions and 4 deletions
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10
arch/cpu/cc2538/dev/cc2538-rf.c
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@ -86,6 +86,7 @@
#define LQI_BIT_MASK 0x7F
/* RSSI Offset */
#define RSSI_OFFSET 73
#define RSSI_INVALID -128
/* 192 usec off -> on interval (RX Callib -> SFD Wait). We wait a bit more */
#define ONOFF_TIME RTIMER_ARCH_SECOND / 3125
@ -244,10 +245,11 @@ get_rssi(void)
on();
}
/* Wait on RSSI_VALID */
while((REG(RFCORE_XREG_RSSISTAT) & RFCORE_XREG_RSSISTAT_RSSI_VALID) == 0);
rssi = (int8_t)(REG(RFCORE_XREG_RSSI) & RFCORE_XREG_RSSI_RSSI_VAL) - RSSI_OFFSET;
/* Wait for a valid RSSI reading */
do {
rssi = REG(RFCORE_XREG_RSSI);
} while(rssi == RSSI_INVALID);
rssi -= RSSI_OFFSET;
/* If we were off, turn back off */
if(was_off) {