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drivers/sx127x: add functions required for loramac

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This commit is contained in:
Alexandre Abadie 2017-11-20 17:28:07 +01:00
parent ef3c6022f2
commit b543d0b5da
3 changed files with 36 additions and 1 deletions
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20
drivers/include/sx127x.h
View File

@ -281,6 +281,26 @@ uint32_t sx127x_random(sx127x_t *dev);
*/
void sx127x_start_cad(sx127x_t *dev);
/**
* @brief Checks that channel is free with specified RSSI threshold.
*
* @param[in] dev The sx127x device structure pointer
* @param[in] freq channel RF frequency
* @param[in] rssi_threshold RSSI threshold
*
* @return true if channel is free, false otherwise
*/
bool sx127x_is_channel_free(sx127x_t *dev, uint32_t freq, int16_t rssi_threshold);
/**
* @brief Reads the current RSSI value.
*
* @param[in] dev The sx127x device structure pointer
*
* @return the current value of RSSI (in dBm)
*/
int16_t sx127x_read_rssi(const sx127x_t *dev);
/**
* @brief Gets current state of transceiver.
*

2
drivers/sx127x/sx127x_getset.c
View File

@ -109,7 +109,7 @@ uint8_t sx127x_get_syncword(const sx127x_t *dev)
void sx127x_set_syncword(sx127x_t *dev, uint8_t syncword)
{
DEBUG("[DEBUG] Set syncword: %d\n", syncword);
DEBUG("[DEBUG] Set syncword: %02x\n", syncword);
sx127x_reg_write(dev, SX127X_REG_LR_SYNCWORD, syncword);
}

15
drivers/sx127x/sx127x_internal.c
View File

@ -224,3 +224,18 @@ void sx127x_start_cad(sx127x_t *dev)
break;
}
}
bool sx127x_is_channel_free(sx127x_t *dev, uint32_t freq, int16_t rssi_threshold)
{
int16_t rssi = 0;
sx127x_set_channel(dev, freq);
sx127x_set_op_mode(dev, SX127X_RF_OPMODE_RECEIVER);
xtimer_usleep(1000); /* wait 1 millisecond */
rssi = sx127x_read_rssi(dev);
sx127x_set_sleep(dev);
return (rssi <= rssi_threshold);
}