wip: arch/nrf52: add initial support for IEEE 802.15.4

Documentation/platforms/arm/nrf52/boards/nrf52840-dk/index.rst

@@ -138,3 +138,20 @@ usbnsh
 ------
 
 Basic NuttShell configuration (CDCACM console enabled in USB Port, at 115200 bps).
+
+ieee802154_6lowpan
+------------------
+
+Cheat Sheet. Here is a concise summary of all all the steps needed to
+run the UDP test (C=Coordinator; E=Endpoint)::
+
+ C: nsh> i8 wpan0 startpan cd:ab
+ C: nsh> i8 set saddr 0A:00
+ C: nsh> i8 set ep_saddr 0B:00
+ C: nsh> i8 acceptassoc
+ E: nsh> i8 wpan0 assoc
+ C: nsh> ifup wpan0
+ C: nsh> ifconfig <-- To get the <server-ip>
+ E: nsh> ifup wpan0
+ C: nsh> udpserver &
+ E: nsh> udpclient <server-ip> &

Documentation/platforms/arm/nrf52/ieee802154.rst

@@ -0,0 +1,47 @@
+==========================
+Nordic nRF52 IEEE 802.15.4
+==========================
+
+.. note::
+
+ This driver is highly experimental.
+ Help with development and testing will be appreciated ;)
+
+Basic support for IEEE 802.15.4 can be found in
+``arch/arm/src/nrf52/ieee802154``.
+
+Supported features:
+
+* frame transmission
+* frame reception and filtering
+* immediate ACK (incoming and outgoing)
+* promiscuous mode
+* delayed transmision
+* radio events trace
+* setting pending bit for all incoming Data Request frames
+* un-slotted CSMA-CA
+
+Work in progres features (some logic is present, but needs more work):
+
+* slotted CSMA-CA
+* GTS
+* beacon transmision
+
+Fetures not implemented:
+
+* enhanced ACK (Enh-ACK)
+* enhanced beacon
+* low power mode
+* advanced features from IEEE 802.15.4e
+
+Reserved peripherals
+====================
+
+This implementation reserves the following peripherals:
+
+* ``RADIO`` - used for radio operations
+
+* ``TIMER0`` - used as high resolution timer for ACK, IFS and other radio delays
+
+* ``RTC0`` - if superframe support is enabled, used as low power timer to hande
+ superframe events

Documentation/platforms/arm/nrf52/index.rst

@@ -51,9 +51,9 @@ Peripheral Support
 
 The following list indicates peripherals supported in NuttX:
 
-========== ======= =====
+========== ======= ===============
 Peripheral Support Notes
-========== ======= =====
+========== ======= ===============
 GPIO Yes
 GPIOTE Yes
 I2S No
@@ -64,7 +64,7 @@ PPI Yes
 PWM Yes
 QDEC No
 QSPI Yes
-RADIO Yes Basic
+RADIO Yes BLE, IEEE 802.15.4
 RNG Yes
 RTC Yes
 SAADC Yes
@@ -78,7 +78,7 @@ UART Yes
 UARTE No
 USBD Yes
 WDT Yes
-========== ======= =====
+========== ======= ===============
 
 Peripherals such as AAR, ACL, CCM, ECB are not directly used by NuttX since they
 are part of BLE controller implementation (link).
@@ -206,6 +206,11 @@ is provided with settings already set.
 Note that in this case, some peripherals (mostly those related to BLE) will be unavailable. Some PPI
 channels will also be ocuppied (``NRF52_PPI_NUM_CONFIGURABLE_CHANNELS`` will be set accordingly in this case).
 
+IEEE 802.15.4 Support
+=====================
+
+Details about IEEE 802.15.4 support for nRF52 can be found in :doc:`ieee802154`.
+
 Supported Boards
 ================
 
@@ -214,3 +219,4 @@ Supported Boards
  :maxdepth: 1
 
  boards/*/*
+ ieee802154.rst

arch/arm/src/nrf52/CMakeLists.txt

@@ -94,6 +94,20 @@ endif()
 
 if(CONFIG_NRF52_RADIO)
  list(APPEND SRCS nrf52_radio.c)
+
+ if(CONFIG_NRF52_RADIO_IEEE802154)
+ list(APPEND SRCS ieee802154/nrf52_ieee802154_radio.c)
+ list(APPEND SRCS ieee802154/nrf52_ieee802154_tim.c)
+ list(APPEND SRCS ieee802154/nrf52_ieee802154.c)
+
+ if(CONFIG_NRF52_RADIO_IEEE802154_SUPERFRAME)
+ list(APPEND SRCS ieee802154/nrf52_ieee802154_rtc.c)
+ endif()
+
+ if(CONFIG_NRF52_RADIO_IEEE802154_TRACE)
+ list(APPEND SRCS ieee802154/nrf52_ieee802154_trace.c)
+ endif()
+ endif()
 endif()
 
 if(CONFIG_NRF52_TIMER)

arch/arm/src/nrf52/Kconfig

@@ -629,6 +629,40 @@ config NRF52_RADIO_CUSTOM
  bool "RADIO uses custom IRQ handlers"
  default n
 
+config NRF52_RADIO_IEEE802154
+ bool "RADIO IEEE802.15.4 protocol"
+ default n
+ depends on NRF52_HAVE_IEEE802154
+ select ARMV7M_USEBASEPRI
+ select ARCH_RAMVECTORS
+ select ARCH_IRQPRIO
+ select NRF52_RADIO_CUSTOM
+ select NRF52_TIMER0
+
+if NRF52_RADIO_IEEE802154
+
+config NRF52_RADIO_IEEE802154_SUPERFRAME
+ bool "RADIO IEEE802.15.4 superframe support"
+ default n
+ select NRF52_RTC0
+ select NRF52_USE_LFCLK
+
+config NRF52_RADIO_IEEE802154_GTS_SLOTS
+ int "RADIO IEEE802.15.4 GTS slots"
+ default 2
+ depends on NRF52_RADIO_IEEE802154_SUPERFRAME
+
+config NRF52_RADIO_IEEE802154_TRACE
+ bool "RADIO IEEE802.15.4 trace support"
+ default n
+
+config NRF52_RADIO_IEEE802154_TRACE_BUFSIZE
+ int "RADIO IEEE802.15.4 trace buffer size"
+ depends on NRF52_RADIO_IEEE802154_TRACE
+ default 1024
+
+endif
+
 endif #NRF52_RADIO
 
 endmenu # "RADIO Configuration"

arch/arm/src/nrf52/Make.defs

@@ -88,7 +88,21 @@ CHIP_CSRCS += nrf52_ppi.c
 endif
 
 ifeq ($(CONFIG_NRF52_RADIO),y)
-CHIP_CSRCS += nrf52_radio.c
+ CHIP_CSRCS += nrf52_radio.c
+
+ ifeq ($(CONFIG_NRF52_RADIO_IEEE802154),y)
+ CHIP_CSRCS += ieee802154/nrf52_ieee802154_radio.c 
+ CHIP_CSRCS += ieee802154/nrf52_ieee802154_tim.c 
+ CHIP_CSRCS += ieee802154/nrf52_ieee802154.c
+
+ ifeq ($(CONFIG_NRF52_RADIO_IEEE802154_SUPERFRAME),y)
+ CHIP_CSRCS += ieee802154/nrf52_ieee802154_rtc.c 
+ endif
+
+ ifeq ($(CONFIG_NRF52_RADIO_IEEE802154_TRACE),y)
+ CHIP_CSRCS += ieee802154/nrf52_ieee802154_trace.c
+ endif
+ endif
 endif
 
 ifeq ($(CONFIG_NRF52_TIMER),y)