ieee802154/submac: calculate symbol time on demand

drivers/netdev_ieee802154_submac/netdev_ieee802154_submac.c

@@ -43,7 +43,7 @@
 static int _get(netdev_t *netdev, netopt_t opt, void *value, size_t max_len)
 {
     netdev_ieee802154_t *netdev_ieee802154 = container_of(netdev, netdev_ieee802154_t, netdev);
     netdev_ieee802154_submac_t *netdev_submac = container_of(netdev_ieee802154, netdev_ieee802154_submac_t, dev);
     ieee802154_submac_t *submac = &netdev_submac->submac;
 
     switch (opt) {
@@ -135,13 +135,13 @@
     netdev->event_callback(netdev, NETDEV_EVENT_ISR);
 }
 
-void ieee802154_submac_ack_timer_set(ieee802154_submac_t *submac, uint16_t us)
+void ieee802154_submac_ack_timer_set(ieee802154_submac_t *submac)
 {
     netdev_ieee802154_submac_t *netdev_submac = container_of(submac,
                                                              netdev_ieee802154_submac_t,
                                                              submac);
 
-    ztimer_set(ZTIMER_USEC, &netdev_submac->ack_timer, us);
+    ztimer_set(ZTIMER_USEC, &netdev_submac->ack_timer, submac->ack_timeout_us);
 }
 
 void ieee802154_submac_ack_timer_cancel(ieee802154_submac_t *submac)

sys/include/net/ieee802154.h

@@ -25,8 +25,9 @@
 #include <stdlib.h>
 
 #include "byteorder.h"
-#include "net/eui64.h"
 #include "modules.h"
+#include "net/eui64.h"
+#include "time_units.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -119,6 +120,18 @@ extern "C" {
  */
 #define IEEE802154_ACK_TIMEOUT_SYMS     (54)
 
+/**
+ * @brief Symbol time for IEEE 802.15.4 MR-OFDM in µs
+ */
+#define IEEE802154_MR_OFDM_SYMBOL_TIME_US   (120)
+
+/**
+ * @brief Symbol time for IEEE 802.15.4 MR-FSK in µs
+ *
+ * symbol time is always 20 µs for MR-FSK (table 0, pg. 7)
+ */
+#define IEEE802154_MR_FSK_SYMBOL_TIME_US    (20)
+
 /**
  * @brief value of measured power when RSSI is zero.
  *
@@ -176,17 +189,67 @@ typedef enum {
     IEEE802154_PHY_OQPSK,           /**< Offset Quadrature Phase-Shift Keying */
     IEEE802154_PHY_MR_OQPSK,        /**< Multi-Rate Offset Quadrature Phase-Shift Keying */
     IEEE802154_PHY_MR_OFDM,         /**< Multi-Rate Orthogonal Frequency-Division Multiplexing */
-    IEEE802154_PHY_MR_FSK           /**< Multi-Rate Frequency Shift Keying */
+    IEEE802154_PHY_MR_FSK,          /**< Multi-Rate Frequency Shift Keying */
+
+    IEEE802154_PHY_NO_OP,           /**< don't change PHY configuration */
 } ieee802154_phy_mode_t;
 
 /**
  * @brief   802.15.4 forward error correction schemes
  */
-enum {
+typedef enum {
     IEEE802154_FEC_NONE,            /**< no forward error correction */
     IEEE802154_FEC_NRNSC,           /**< non-recursive and non-systematic code */
     IEEE802154_FEC_RSC              /**< recursive and systematic code */
-};
+} ieee802154_mr_fsk_fec_t;
+
+/**
+ * @brief   802.15.4 MR-FSK symbol rates
+ */
+typedef enum {
+    IEEE802154_MR_FSK_SRATE_50K,    /**< 50k Symbols/s  */
+    IEEE802154_MR_FSK_SRATE_100K,   /**< 100k Symbols/s */
+    IEEE802154_MR_FSK_SRATE_150K,   /**< 150k Symbols/s */
+    IEEE802154_MR_FSK_SRATE_200K,   /**< 200k Symbols/s */
+    IEEE802154_MR_FSK_SRATE_300K,   /**< 300k Symbols/s */
+    IEEE802154_MR_FSK_SRATE_400K,   /**< 400k Symbols/s */
+} ieee802154_mr_fsk_srate_t;
+
+/**
+ * @brief   802.15.4 MR-OQPSK chip rates
+ */
+typedef enum {
+    IEEE802154_MR_OQPSK_CHIPS_100,  /**< 100 kChip/s  */
+    IEEE802154_MR_OQPSK_CHIPS_200,  /**< 200 kChip/s  */
+    IEEE802154_MR_OQPSK_CHIPS_1000, /**< 1000 kChip/s */
+    IEEE802154_MR_OQPSK_CHIPS_2000, /**< 2000 kChip/s */
+} ieee802154_mr_oqpsk_chips_t;
+
+/**
+ * @brief Get the minimum preamble length for a given symbol rate
+ *
+ * From IEEE 802.15.4g Table 6-64
+ *
+ * @param[in] srate     symbol rate
+ * @return    preamble length in bytes
+ */
+static inline uint8_t ieee802154_mr_fsk_plen(ieee802154_mr_fsk_srate_t srate)
+{
+    switch (srate) {
+    case IEEE802154_MR_FSK_SRATE_50K:
+        return 2;
+    case IEEE802154_MR_FSK_SRATE_100K:
+        return 3;
+    case IEEE802154_MR_FSK_SRATE_150K:
+    case IEEE802154_MR_FSK_SRATE_200K:
+    case IEEE802154_MR_FSK_SRATE_300K:
+        return 8;
+    case IEEE802154_MR_FSK_SRATE_400K:
+        return 10;
+    }
+
+    return 0;
+}
 
 /**
  * @brief   Special address definitions
@@ -256,6 +319,62 @@ extern const uint8_t ieee802154_addr_bcast[IEEE802154_ADDR_BCAST_LEN];
 #define CONFIG_IEEE802154_DEFAULT_SUBGHZ_PAGE      (2U)
 #endif
 
+/**
+ * @brief IEEE802.15.4 MR-OQPSK default chip rate
+ */
+#ifndef CONFIG_IEEE802154_MR_OQPSK_DEFAULT_CHIPS
+#define CONFIG_IEEE802154_MR_OQPSK_DEFAULT_CHIPS    IEEE802154_MR_OQPSK_CHIPS_1000
+#endif
+
+/**
+ * @brief IEEE802.15.4 MR-OQPSK default rate mode
+ */
+#ifndef CONFIG_IEEE802154_MR_OQPSK_DEFAULT_RATE
+#define CONFIG_IEEE802154_MR_OQPSK_DEFAULT_RATE     (2U)
+#endif
+
+/**
+ * @brief IEEE802.15.4 MR-OFDM default modulation option
+ */
+#ifndef CONFIG_IEEE802154_MR_OFDM_DEFAULT_OPTION
+#define CONFIG_IEEE802154_MR_OFDM_DEFAULT_OPTION    (2U)
+#endif
+
+/**
+ * @brief IEEE802.15.4 MR-OFDM default Modulation & Coding Scheme
+ */
+#ifndef CONFIG_IEEE802154_MR_OFDM_DEFAULT_SCHEME
+#define CONFIG_IEEE802154_MR_OFDM_DEFAULT_SCHEME    (2U)
+#endif
+
+/**
+ * @brief IEEE802.15.4 MR-FSK default symbol rate
+ */
+#ifndef CONFIG_IEEE802154_MR_FSK_DEFAULT_SRATE
+#define CONFIG_IEEE802154_MR_FSK_DEFAULT_SRATE      IEEE802154_MR_FSK_SRATE_200K
+#endif
+
+/**
+ * @brief IEEE802.15.4 MR-FSK default modulation index, fraction of 64
+ */
+#ifndef CONFIG_IEEE802154_MR_FSK_DEFAULT_MOD_IDX
+#define CONFIG_IEEE802154_MR_FSK_DEFAULT_MOD_IDX    (64U)
+#endif
+
+/**
+ * @brief IEEE802.15.4 MR-FSK default modulation order
+ */
+#ifndef CONFIG_IEEE802154_MR_FSK_DEFAULT_MOD_ORD
+#define CONFIG_IEEE802154_MR_FSK_DEFAULT_MOD_ORD    (2U)
+#endif
+
+/**
+ * @brief IEEE802.15.4 MR-FSK default error correction mode
+ */
+#ifndef CONFIG_IEEE802154_MR_FSK_DEFAULT_FEC
+#define CONFIG_IEEE802154_MR_FSK_DEFAULT_FEC        IEEE802154_FEC_NONE
+#endif
+
 /**
  * @brief IEEE802.15.4 default PANID
  */

sys/include/net/ieee802154/radio.h

@@ -459,6 +459,35 @@ typedef struct {
     int8_t pow;                     /**< TX power in dBm */
 } ieee802154_phy_conf_t;
 
+/**
+ * @brief extension for IEEE 802.15.4g MR-OQPSK PHY
+ */
+typedef struct {
+    ieee802154_phy_conf_t super;        /**< common settings */
+    ieee802154_mr_oqpsk_chips_t chips;  /**< chip rate       */
+    uint8_t rate_mode;                  /**< rate mode       */
+} ieee802154_mr_oqpsk_conf_t;
+
+/**
+ * @brief extension for IEEE 802.15.4g MR-ODFM PHY
+ */
+typedef struct {
+    ieee802154_phy_conf_t super;        /**< common settings */
+    uint8_t option;                     /**< OFDM Option */
+    uint8_t scheme;                     /**< Modulation & Coding Scheme */
+} ieee802154_mr_ofdm_conf_t;
+
+/**
+ * @brief extension for IEEE 802.15.4g MR-FSK PHY
+ */
+typedef struct {
+    ieee802154_phy_conf_t super;        /**< common settings */
+    ieee802154_mr_fsk_srate_t srate;    /**< symbol rate */
+    uint8_t mod_ord;                    /**< modulation order, 2 or 4 */
+    uint8_t mod_idx;                    /**< modulation index */
+    ieee802154_mr_fsk_fec_t fec;        /**< forward error correction */
+} ieee802154_mr_fsk_conf_t;
+
 /**
  * @brief IEEE 802.15.4 radio operations
  */

sys/include/net/ieee802154/submac.h

@@ -195,6 +195,8 @@ struct ieee802154_submac {
     const ieee802154_submac_cb_t *cb;   /**< pointer to the SubMAC callbacks */
     ieee802154_csma_be_t be;            /**< CSMA-CA backoff exponent params */
     bool wait_for_ack;                  /**< SubMAC is waiting for an ACK frame */
+    uint16_t ack_timeout_us;            /**< ACK timeout in µs */
+    uint16_t csma_backoff_us;           /**< CSMA sender backoff period in µs */
     uint16_t panid;                     /**< IEEE 802.15.4 PAN ID */
     uint16_t channel_num;               /**< IEEE 802.15.4 channel number */
     uint8_t channel_page;               /**< IEEE 802.15.4 channel page */
@@ -310,9 +312,7 @@ static inline ieee802154_phy_mode_t ieee802154_get_phy_mode(
  * @brief Set IEEE 802.15.4 PHY configuration (channel, TX power)
  *
  * @param[in] submac pointer to the SubMAC descriptor
- * @param[in] channel_num channel number
- * @param[in] channel_page channel page
- * @param[in] tx_pow transmission power (in dBm)
+ * @param[in] conf   pointer to the PHY configuration
  *
  * @return 0 on success
  * @return -ENOTSUP if the PHY settings are not supported
@@ -321,8 +321,7 @@ static inline ieee802154_phy_mode_t ieee802154_get_phy_mode(
  *         @ref ieee802154_submac_cb_t::tx_done
  * @return negative errno on error
  */
-int ieee802154_set_phy_conf(ieee802154_submac_t *submac, uint16_t channel_num,
-                            uint8_t channel_page, int8_t tx_pow);
+int ieee802154_set_phy_conf(ieee802154_submac_t *submac, const ieee802154_phy_conf_t *conf);
 
 /**
  * @brief Set IEEE 802.15.4 channel number
@@ -342,8 +341,14 @@ int ieee802154_set_phy_conf(ieee802154_submac_t *submac, uint16_t channel_num,
 static inline int ieee802154_set_channel_number(ieee802154_submac_t *submac,
                                                 uint16_t channel_num)
 {
-    return ieee802154_set_phy_conf(submac, channel_num, submac->channel_page,
-                                   submac->tx_pow);
+    const ieee802154_phy_conf_t conf = {
+        .phy_mode = IEEE802154_PHY_NO_OP,
+        .channel = channel_num,
+        .page = submac->channel_page,
+        .pow = submac->tx_pow,
+    };
+
+    return ieee802154_set_phy_conf(submac, &conf);
 }
 
 /**
@@ -364,8 +369,14 @@ static inline int ieee802154_set_channel_number(ieee802154_submac_t *submac,
 static inline int ieee802154_set_channel_page(ieee802154_submac_t *submac,
                                               uint16_t channel_page)
 {
-    return ieee802154_set_phy_conf(submac, submac->channel_num, channel_page,
-                                   submac->tx_pow);
+    const ieee802154_phy_conf_t conf = {
+        .phy_mode = IEEE802154_PHY_NO_OP,
+        .channel = submac->channel_num,
+        .page = channel_page,
+        .pow = submac->tx_pow,
+    };
+
+    return ieee802154_set_phy_conf(submac, &conf);
 }
 
 /**
@@ -386,8 +397,14 @@ static inline int ieee802154_set_channel_page(ieee802154_submac_t *submac,
 static inline int ieee802154_set_tx_power(ieee802154_submac_t *submac,
                                           int8_t tx_pow)
 {
-    return ieee802154_set_phy_conf(submac, submac->channel_num,
-                                   submac->channel_page, tx_pow);
+    const ieee802154_phy_conf_t conf = {
+        .phy_mode = IEEE802154_PHY_NO_OP,
+        .channel = submac->channel_num,
+        .page = submac->channel_page,
+        .pow = tx_pow,
+    };
+
+    return ieee802154_set_phy_conf(submac, &conf);
 }
 
 /**
@@ -501,10 +518,8 @@ int ieee802154_submac_init(ieee802154_submac_t *submac, const network_uint16_t *
  * @note This function should be implemented by the user of the SubMAC.
  *
  * @param[in] submac pointer to the SubMAC descriptor
- * @param[in] us microseconds until the ACK timeout timer is fired
  */
-extern void ieee802154_submac_ack_timer_set(ieee802154_submac_t *submac,
-                                            uint16_t us);
+extern void ieee802154_submac_ack_timer_set(ieee802154_submac_t *submac);
 
 /**
  * @brief Cancel the ACK timeout timer