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kw2xrf: dBm conversion to int16_t

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This commit is contained in:
Koen Zandberg 2017-08-30 22:30:24 +02:00
parent 7dce20afb6
commit 2d491e0619
3 changed files with 4 additions and 4 deletions
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2
drivers/kw2xrf/include/kw2xrf_getset.h
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@ -160,7 +160,7 @@ uint8_t kw2xrf_get_cca_mode(kw2xrf_t *dev);
*
* @return deduced RSSI in dBm
*/
uint32_t kw2xrf_get_rssi(uint32_t value);
int16_t kw2xrf_get_rssi(uint32_t value);
/**
* @brief Get state of a given device

4
drivers/kw2xrf/kw2xrf_getset.c
View File

@ -346,7 +346,7 @@ uint8_t kw2xrf_get_cca_mode(kw2xrf_t *dev)
return (tmp & MKW2XDM_PHY_CTRL4_CCATYPE_MASK) >> MKW2XDM_PHY_CTRL4_CCATYPE_SHIFT;
}
uint32_t kw2xrf_get_rssi(uint32_t value)
int16_t kw2xrf_get_rssi(uint32_t value)
{
/* Get rssi (Received Signal Strength Indicator, unit is dBm)
* from lqi (Link Quality Indicator) value.
@ -361,7 +361,7 @@ uint32_t kw2xrf_get_rssi(uint32_t value)
*/
uint32_t a = (uint32_t)(295.4 * 65536 / 2.84);
uint32_t b = (uint32_t)(65536 / 2.84);
return (a - (b * value)) >> 16;
return ((b * value) - a) >> 16;
}
void kw2xrf_set_option(kw2xrf_t *dev, uint16_t option, bool state)

2
drivers/kw2xrf/kw2xrf_netdev.c
View File

@ -169,7 +169,7 @@ static int _recv(netdev_t *netdev, void *buf, size_t len, void *info)
if (info != NULL) {
netdev_ieee802154_rx_info_t *radio_info = info;
radio_info->lqi = ((uint8_t*)buf)[pkt_len];
radio_info->rssi = (uint8_t)kw2xrf_get_rssi(radio_info->lqi);
radio_info->rssi = kw2xrf_get_rssi(radio_info->lqi);
}
/* skip FCS and LQI */