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drivers: lora: Add a continuous wave test API

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Add an API to transmit a continuous wave at a fixed frequency. This
functionality is useful to test the radio in a lab setup.

Signed-off-by: Andreas Sandberg <andreas@sandberg.pp.se>
This commit is contained in:
Andreas Sandberg 2020-04-16 00:29:41 +01:00 • committed by Carles Cufí
commit d3c6cfc0ee
2 changed files with 43 additions and 0 deletions
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9
drivers/lora/sx1276.c
View file

@ -446,6 +446,13 @@ static int sx1276_lora_config(struct device *dev,
return 0;
}
static int sx1276_lora_test_cw(struct device *dev, u32_t frequency,
s8_t tx_power, u16_t duration)
{
Radio.SetTxContinuousWave(frequency, tx_power, duration);
return 0;
}
/* Initialize Radio driver callbacks */
const struct Radio_s Radio = {
.Init = SX1276Init,
@ -468,6 +475,7 @@ const struct Radio_s Radio = {
.IrqProcess = NULL,
.RxBoosted = NULL,
.SetRxDutyCycle = NULL,
.SetTxContinuousWave = SX1276SetTxContinuousWave,
};
static int sx1276_lora_init(struct device *dev)
@ -538,6 +546,7 @@ static const struct lora_driver_api sx1276_lora_api = {
.config = sx1276_lora_config,
.send = sx1276_lora_send,
.recv = sx1276_lora_recv,
.test_cw = sx1276_lora_test_cw,
};
DEVICE_AND_API_INIT(sx1276_lora, DT_INST_LABEL(0),

34
include/drivers/lora.h
View file

@ -75,10 +75,20 @@ typedef int (*lora_api_send)(struct device *dev,
typedef int (*lora_api_recv)(struct device *dev, u8_t *data, u8_t size,
k_timeout_t timeout, s16_t *rssi, s8_t *snr);
/**
* @typedef lora_api_test_cw()
* @brief Callback API for transmitting a continuous wave
*
* @see lora_test_cw() for argument descriptions.
*/
typedef int (*lora_api_test_cw)(struct device *dev, u32_t frequency,
s8_t tx_power, u16_t duration);
struct lora_driver_api {
lora_api_config config;
lora_api_send send;
lora_api_recv recv;
lora_api_test_cw test_cw;
};
/**
@ -139,4 +149,28 @@ static inline int lora_recv(struct device *dev, u8_t *data, u8_t size,
return api->recv(dev, data, size, timeout, rssi, snr);
}
/**
* @brief Transmit an unmodulated continuous wave at a given frequency
*
* @note Only use this functionality in a test setup where the
* transmission does not interfere with other devices.
*
* @param dev LoRa device
* @param frequency Output frequency (Hertz)
* @param tx_power TX power (dBm)
* @param duration Transmission duration in seconds.
* @return 0 on success, negative on error
*/
static inline int lora_test_cw(struct device *dev, u32_t frequency,
s8_t tx_power, u16_t duration)
{
const struct lora_driver_api *api = dev->driver_api;
if (!api->test_cw) {
return -ENOTSUP;
}
return api->test_cw(dev, frequency, tx_power, duration);
}
#endif /* ZEPHYR_INCLUDE_DRIVERS_LORA_H_ */