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ieee802154: add function to get symbol time

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This commit is contained in:
Jose Alamos 2023-01-25 14:55:31 +01:00
parent d11a358b1d
commit 3c3e1d7103
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2 changed files with 90 additions and 0 deletions
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10
sys/include/net/ieee802154.h
View File

@ -550,6 +550,16 @@ static inline uint8_t ieee802154_dbm_to_rssi(int16_t dbm)
return val - IEEE802154_RADIO_RSSI_OFFSET; return val - IEEE802154_RADIO_RSSI_OFFSET;
} }
/**
* @brief Get the symbol time for a given PHY channel.
*
* @param[in] channel_page channel page
* @param[in] channel_num channel number
*
* @return the symbol time in us
*/
uint32_t ieee802154_get_symbol_time(uint8_t channel_page, uint16_t channel_num);
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif

80
sys/net/link_layer/ieee802154/ieee802154.c
View File

@ -19,6 +19,32 @@
#include "net/ieee802154.h" #include "net/ieee802154.h"
#define ENABLE_DEBUG 0
#include "debug.h"
#define CHANNEL_868MHZ (0U) /**< channel associated to the 868 MHz band */
/**
* @brief O-QPSK symbol time definition
* @see IEEE 802.15.4-2015 standard, section 12.3.3
*/
#define SYMTIME_OQPSK_868MHZ (40U) /**< 25 ksymbols/s */
#define SYMTIME_OQPSK_COMMON (16U) /**< 62.5 ksymbols/s */
/**
* @brief BPSK symbol time definition
* @see IEEE 802.15.4-2015 standard, section 13.3.3
*/
#define SYMTIME_BPSK_868MHZ (50U) /**< 20 ksymbols/s */
#define SYMTIME_BPSK_COMMON (25U) /**< 40 ksymbols/s */
/**
* @brief ASK symbol time definition
* @see IEEE 802.15.4-2015 standard, section 14.4.3
*/
#define SYMTIME_ASK_868MHZ (80U) /**< 12.5 ksymbols/s */
#define SYMTIME_ASK_COMMON (20U) /**< 50 ksymbols/s */
const uint8_t ieee802154_addr_bcast[IEEE802154_ADDR_BCAST_LEN] = IEEE802154_ADDR_BCAST; const uint8_t ieee802154_addr_bcast[IEEE802154_ADDR_BCAST_LEN] = IEEE802154_ADDR_BCAST;
size_t ieee802154_set_frame_hdr(uint8_t *buf, const uint8_t *src, size_t src_len, size_t ieee802154_set_frame_hdr(uint8_t *buf, const uint8_t *src, size_t src_len,
@ -281,4 +307,58 @@ int ieee802154_dst_filter(const uint8_t *mhr, uint16_t pan,
return 1; return 1;
} }
static inline uint8_t _get_oqpsk_symbol_time(uint16_t channel)
{
if (channel == CHANNEL_868MHZ) {
return SYMTIME_OQPSK_868MHZ;
}
return SYMTIME_OQPSK_COMMON;
}
static inline uint8_t _get_ask_symbol_time(uint16_t channel)
{
if (channel == CHANNEL_868MHZ) {
return SYMTIME_ASK_868MHZ;
}
return SYMTIME_ASK_COMMON;
}
static inline uint8_t _get_bpsk_symbol_time(uint16_t channel)
{
if (channel == CHANNEL_868MHZ) {
return SYMTIME_BPSK_868MHZ;
}
return SYMTIME_BPSK_COMMON;
}
uint32_t ieee802154_get_symbol_time(uint8_t channel_page, uint16_t channel_num)
{
/* BPSK for SubGHZ, O-QPSK for 2.4 GHz (see IEEE 802.15.4-2015 standard, section 10.1.2.2) */
if (channel_page == 0) {
if (channel_num <= IEEE802154_CHANNEL_MAX_SUBGHZ) {
return _get_bpsk_symbol_time(channel_num);
}
else {
return _get_oqpsk_symbol_time(channel_num);
}
}
/* ASK for SubGHZ (see IEEE 802.15.4-2015 standard, section 10.1.2.2) */
else if (channel_page == 1) {
if (channel_num <= IEEE802154_CHANNEL_MAX_SUBGHZ) {
return _get_ask_symbol_time(channel_num);
}
}
/* O-QPSK for SubGHZ (see IEEE 802.15.4-2015 standard, section 10.1.2.2) */
else if (channel_page == 2) {
if (channel_num <= IEEE802154_CHANNEL_MAX_SUBGHZ) {
return _get_oqpsk_symbol_time(channel_num);
}
}
/* add more channel pages as needed */
DEBUG("[ieee802154]: ieee802154_get_symbol_time: invalid PHY config or PHY not implemented");
assert(false);
return 0;
}
/** @} */ /** @} */