Diff: RF_Drivers_FSL/driverRFPhy.c

Revision:

5:69f1634cd40b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RF_Drivers_FSL/driverRFPhy.c	Thu Mar 05 14:32:32 2015 -0600
@@ -0,0 +1,1237 @@
+/*
+ * driverRFPhy.c
+ *
+ *  Created on: 14 July 2014
+ *      Author: mBed team
+ */
+#include "arm_hal_interrupt.h"
+#include "arm_hal_phy.h"
+#include "driverRFPhy.h"
+#include "driverAtmelRFInterface.h"
+#include <string.h>
+
+#include <stdio.h>
+
+#include "options.h"
+
+/*RF receive buffer*/
+static uint8_t rf_buffer[RF_BUFFER_SIZE];
+/*RF ACK receive buffer*/
+static uint8_t ack_rx_buf[5];
+/*ACK wait duration changes depending on data rate*/
+static uint16_t rf_ack_wait_duration = RF_ACK_WAIT_TIMEOUT;
+
+static uint8_t radio_tx_power = 0x07;
+static uint8_t rf_channel;
+static uint8_t rf_tuned = 1;
+static uint8_t radio_rpc_value = 0xef;
+static uint8_t rf_use_front_end = 0;
+static uint8_t rf_use_antenna_diversity = 0;
+static uint8_t rf_csd_port = 0;
+static uint8_t rf_csd_pin = 0;
+static uint8_t rf_cps_port = 0;
+static uint8_t rf_cps_pin = 0;
+static uint8_t tx_sequence = 0xff;
+static uint8_t need_ack = 0;
+static uint8_t rf_rx_mode = 0;
+static uint8_t rf_flags = 0;
+static uint8_t rf_rnd_rssi = 0;
+static int8_t rf_radio_driver_id = -1;
+static phy_device_driver_s device_driver;
+static uint8_t atmel_MAC[8];
+static phy_device_channel_info_s channel_info;
+static uint8_t mac_tx_handle = 0;
+
+/*
+ * \brief Function sets given RF flag on.
+ *
+ * \param x Given RF flag
+ *
+ * \return none
+ */
+void rf_flags_set(uint8_t x)
+{
+    rf_flags |= x;
+}
+
+/*
+ * \brief Function clears given RF flag on.
+ *
+ * \param x Given RF flag
+ *
+ * \return none
+ */
+void rf_flags_clear(uint8_t x)
+{
+    rf_flags &= ~x;
+}
+
+/*
+ * \brief Function checks if given RF flag is on.
+ *
+ * \param x Given RF flag
+ *
+ * \return states of the given flags
+ */
+uint8_t rf_flags_check(uint8_t x)
+{
+    return (rf_flags & x);
+}
+
+/*
+ * \brief Function clears all RF flags.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_flags_reset(void)
+{
+    rf_flags = 0;
+}
+
+/*
+ * \brief Function sets CPS and CSD pins of the Front end.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_front_end_rx_lna(void)
+{
+        /* not supported in this version  */
+}
+
+/*
+ * \brief Function clears CPS and CSD pins of the Front end.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_front_end_sleep(void)
+{
+        /* not supported in this version  */
+}
+
+/*
+ * \brief Function initialises and registers the RF driver.
+ *
+ * \param none
+ *
+ * \return rf_radio_driver_id Driver ID given by NET library
+ */
+int8_t rf_device_register(void)
+{
+    rf_init();
+    /*Set pointer to MAC address*/
+    device_driver.PHY_MAC = atmel_MAC;
+    device_driver.driver_description = "ATMEL_MAC";
+#if PHY_LINK_15_4_2_4GHZ_TYPE
+      /*Number of channels in PHY*/
+        channel_info.channel_count = 16;
+        /*Channel mask 26-11*/
+        channel_info.channel_mask = 0x07FFF800;
+        /*Type of RF PHY is SubGHz*/
+        device_driver.link_type = PHY_LINK_15_4_2_4GHZ_TYPE;
+        device_driver.link_channel_info = &channel_info;
+#else
+        /*Number of channels in PHY*/
+    channel_info.channel_count = 11;
+    /*Channel mask 0-10*/
+    channel_info.channel_mask = 0x000007ff;
+    /*Type of RF PHY is SubGHz*/
+    device_driver.link_type = PHY_LINK_15_4_SUBGHZ_TYPE;
+    device_driver.link_channel_info = &channel_info;
+#endif
+   /*Maximum size of payload is 127*/
+    device_driver.phy_MTU = 127;
+    /*No header in PHY*/
+    device_driver.phy_header_length = 0;
+    /*No tail in PHY*/
+    device_driver.phy_tail_length = 0;
+    /*Set address write function*/
+    device_driver.phy_xx_address_write = &rf_address_write;
+    /*Set RF extension function*/
+    device_driver.phy_xx_extension = &rf_extension;
+    /*Set RF state control function*/
+    device_driver.phy_xx_state_control = &rf_interface_state_control;
+    /*Set transmit function*/
+    device_driver.phy_xx_tx = &rf_start_cca;
+    printf("RF Device Registration...");
+    /*Register device driver*/
+    rf_radio_driver_id = arm_net_phy_register(&device_driver);
+    printf("OK\r\n");   
+    return rf_radio_driver_id;
+}
+
+/*
+ * \brief Function returns the generated 8-bit random value for seeding Pseudo-random generator. This value was generated by reading noise from RF channel in RF initialisation.
+ *
+ * \param none
+ *
+ * \return random RSSI value
+ */
+int8_t rf_read_random(void)
+{
+    return rf_rnd_rssi;
+}
+
+/*
+ * \brief Function is a call back for ACK wait timeout.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_ack_wait_timer_interrupt(void)
+{
+    arm_enter_critical();
+    /*Force PLL state*/
+    rf_if_change_trx_state(FORCE_PLL_ON);
+    rf_poll_trx_state_change(PLL_ON);
+    /*Start receiver in RX_AACK_ON state*/
+    rf_rx_mode = 0;
+    rf_flags_clear(RFF_RX);
+    rf_receive();
+    arm_exit_critical();
+}
+
+/*
+ * \brief Function is a call back for calibration interval timer.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_calibration_timer_interrupt(void)
+{
+    /*Calibrate RF*/
+    rf_calibration_cb();
+    /*Start new calibration timeout*/
+    rf_calibration_timer_start(RF_CALIBRATION_INTERVAL);
+}
+
+/*
+ * \brief Function initialises the RF timer for ACK wait and calibration.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_timer_init(void)
+{
+    rf_if_timer_init();
+}
+
+/*
+ * \brief Function starts the ACK wait timeout.
+ *
+ * \param slots Given slots, resolution 50us
+ *
+ * \return none
+ */
+void rf_ack_wait_timer_start(uint16_t slots)
+{
+    rf_if_ack_wait_timer_start(slots);
+}
+
+/*
+ * \brief Function starts the calibration interval.
+ *
+ * \param slots Given slots, resolution 50us
+ *
+ * \return none
+ */
+void rf_calibration_timer_start(uint32_t slots)
+{
+    rf_if_calibration_timer_start(slots);
+}
+
+/*
+ * \brief Function stops the ACK wait timeout.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_ack_wait_timer_stop(void)
+{
+    rf_if_ack_wait_timer_stop();
+}
+
+/*
+ * \brief Function reads the MAC address array.
+ *
+ * \param ptr Pointer to read array
+ *
+ * \return none
+ */
+void rf_read_mac_address(uint8_t *ptr)
+{
+    memcpy(ptr, atmel_MAC, 8);
+}
+
+/*
+ * \brief Function sets the MAC address array.
+ *
+ * \param ptr Pointer to given MAC address array
+ *
+ * \return none
+ */
+void rf_set_mac_address(const uint8_t *ptr)
+{
+    memcpy(atmel_MAC,ptr,8);
+}
+
+/*
+ * \brief Function writes various RF settings in startup.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_write_settings(void)
+{
+    int i, j = 0;
+    
+    arm_enter_critical();
+  
+  //printf("RF Write Settings: 1\r\n"); 
+    rf_if_write_rf_settings();
+ 
+  //printf("RF Write Settings: 2\r\n");
+    /*Set output power*/
+    rf_if_write_set_tx_power_register(radio_tx_power);
+ 
+  //printf("RF Write Settings: 3\r\n");
+    /*Set RPC register*/
+    rf_if_write_set_trx_rpc_register(radio_rpc_value);
+ 
+  //printf("RF Write Settings: 4\r\n");
+    /*Initialise Front end*/
+    if(rf_use_front_end)
+    {
+        printf("RF Front End used\r\n");
+        rf_if_enable_pa_ext();
+                /*  not supported in this version  */    
+    }
+  
+  //printf("RF Write Settings: 5\r\n");  
+    /*Initialise Antenna Diversity*/
+    if(rf_use_antenna_diversity) {
+        printf("RF Antenna diversity\r\n");
+        rf_if_write_antenna_diversity_settings();
+    }    
+  
+  printf("RF Write Settings: 7\r\n");
+    arm_exit_critical();
+   printf("RF Write Settings End\r\n");
+}
+
+/*
+ * \brief Function writes 16-bit address in RF address filter.
+ *
+ * \param short_address Given short address
+ *
+ * \return none
+ */
+void rf_set_short_adr(uint8_t * short_address)
+{
+    uint8_t rf_off_flag = 0;
+    arm_enter_critical();
+    /*Wake up RF if sleeping*/
+    if(rf_if_read_trx_state() == 0x00 || rf_if_read_trx_state() == 0x1F)
+    {
+        rf_if_disable_slptr();
+        rf_off_flag = 1;
+        rf_poll_trx_state_change(TRX_OFF);
+    }
+    /*Write address filter registers*/
+    rf_if_write_short_addr_registers(short_address);
+    /*RF back to sleep*/
+    if(rf_off_flag)
+        rf_if_enable_slptr();
+    arm_exit_critical();
+}
+
+/*
+ * \brief Function writes PAN Id in RF PAN Id filter.
+ *
+ * \param pan_id Given PAN Id
+ *
+ * \return none
+ */
+void rf_set_pan_id(uint8_t *pan_id)
+{
+    uint8_t rf_off_flag = 0;
+
+    arm_enter_critical();
+    /*Wake up RF if sleeping*/
+    if(rf_if_read_trx_state() == 0x00 || rf_if_read_trx_state() == 0x1F)
+    {
+        rf_if_disable_slptr();
+        rf_off_flag = 1;
+        rf_poll_trx_state_change(TRX_OFF);
+    }
+    /*Write address filter registers*/
+    rf_if_write_pan_id_registers(pan_id);
+    /*RF back to sleep*/
+    if(rf_off_flag)
+        rf_if_enable_slptr();
+    arm_exit_critical();
+}
+
+/*
+ * \brief Function writes 64-bit address in RF address filter.
+ *
+ * \param address Given 64-bit address
+ *
+ * \return none
+ */
+void rf_set_address(uint8_t *address)
+{
+    uint8_t rf_off_flag = 0;
+
+    arm_enter_critical();
+    /*Wake up RF if sleeping*/
+    if(rf_if_read_trx_state() == 0x00 || rf_if_read_trx_state() == 0x1F)
+    {
+        rf_if_disable_slptr();
+        rf_off_flag = 1;
+        rf_poll_trx_state_change(TRX_OFF);
+    }
+    /*Write address filter registers*/
+    rf_if_write_ieee_addr_registers(address);
+    /*RF back to sleep*/
+    if(rf_off_flag)
+        rf_if_enable_slptr();
+
+    arm_exit_critical();
+}
+
+/*
+ * \brief Function sets the RF channel.
+ *
+ * \param ch New channel
+ *
+ * \return none
+ */
+void rf_channel_set(uint8_t ch)
+{
+    arm_enter_critical();
+    rf_channel = ch;
+    if(ch < 0x1f)
+        rf_if_set_channel_register(ch);
+    arm_exit_critical();
+}
+
+
+/*
+ * \brief Function initialises the radio driver and resets the radio.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_init(void)
+{
+   printf("RF Init Start\r\n");
+    /*Initialise timers*/
+    rf_timer_init();                //TODO
+    rf_channel = RF_DEFAULT_CHANNEL;
+   printf("RF Reset\r\n");  
+    /*Reset RF module*/
+    rf_if_reset_radio();
+   printf("RF Write Settings\r\n"); 
+    /*Write RF settings*/
+    rf_write_settings();
+   printf("RF Init PHY Mode\r\n"); 
+    /*Initialise PHY mode*/
+    rf_init_phy_mode();
+    /*Clear RF flags*/
+    rf_flags_reset();
+    /*Set RF in TRX OFF state*/
+    rf_if_change_trx_state(TRX_OFF);
+    /*Set RF in PLL_ON state*/
+    rf_if_change_trx_state(PLL_ON);
+    /*Start receiver*/
+    rf_receive();
+    /*Read random variable. This will be used when seeding pseudo-random generator*/
+    rf_rnd_rssi = rf_if_read_rnd();
+    /*Start RF calibration timer*/
+    rf_calibration_timer_start(RF_CALIBRATION_INTERVAL);  //ACA!
+        printf("RF Init End\r\n");
+}
+
+/**
+ * \brief Function gets called when MAC is setting radio off.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_off(void)
+{
+    if(rf_flags_check(RFF_ON))
+    {
+        rf_cca_abort();
+        uint16_t while_counter = 0;
+        /*Wait while receiving*/
+        while(rf_if_read_trx_state() == BUSY_RX_AACK || rf_if_read_trx_state() == BUSY_RX)
+        {
+            while_counter++;
+            if(while_counter == 0xffff)
+                break;
+        }
+        /*RF state change: RX_AACK_ON->PLL_ON->TRX_OFF->SLEEP*/
+        if(rf_if_read_trx_state() == RX_AACK_ON)
+        {
+            rf_if_change_trx_state(PLL_ON);
+        }
+        rf_if_change_trx_state(TRX_OFF);
+        rf_if_enable_slptr();
+        rf_flags_clear(~RFF_ON);
+        /*Front end in sleep*/
+        if(rf_use_front_end)
+        {
+            rf_if_disable_pa_ext();
+            rf_front_end_sleep();
+        }
+        /*Disable Antenna Diversity*/
+        if(rf_use_antenna_diversity)
+            rf_if_disable_ant_div();
+    }
+}
+
+/*
+ * \brief Function polls the RF state until it has changed to desired state.
+ *
+ * \param trx_state RF state
+ *
+ * \return none
+ */
+void rf_poll_trx_state_change(rf_trx_states_t trx_state)
+{
+    uint16_t while_counter = 0;
+    arm_enter_critical();
+
+    if(trx_state != RF_TX_START)
+    {
+        if(trx_state == FORCE_PLL_ON)
+            trx_state = PLL_ON;
+        else if(trx_state == FORCE_TRX_OFF)
+            trx_state = TRX_OFF;
+
+        while(rf_if_read_trx_state() != trx_state)
+        {
+            while_counter++;
+            if(while_counter == 0x1ff)
+                break;
+        }
+    }
+    arm_exit_critical();
+}
+
+/*
+ * \brief Function starts the CCA process before starting data transmission and copies the data to RF TX FIFO.
+ *
+ * \param data_ptr Pointer to TX data
+ * \param data_length Length of the TX data
+ * \param tx_handle Handle to transmission
+ * \return 0 Success
+ * \return -1 Busy
+ */
+int8_t rf_start_cca(uint8_t *data_ptr, uint16_t data_length, uint8_t tx_handle)
+{
+    /*Check if transmitter is busy*/
+    if((rf_if_read_trx_state() == BUSY_RX_AACK) || (rf_if_read_trx_state() == BUSY_RX))
+    {
+        /*Return busy*/
+        return -1;
+    }
+    else
+    {
+        arm_enter_critical();
+        /*Check if transmitted data needs to be acked*/
+        if(*data_ptr & 0x20)
+            need_ack = 1;
+        else
+            need_ack = 0;
+        /*Store the sequence number for ACK handling*/
+        tx_sequence = *(data_ptr + 2);
+        /*Set radio in RX state to read channel*/
+        rf_receive();
+        /*Write TX FIFO*/
+        rf_if_write_frame_buffer(data_ptr, (uint8_t)data_length);
+        rf_flags_set(RFF_CCA);
+        /*Start CCA process*/
+        rf_if_enable_cca_ed_done_interrupt();
+        rf_if_start_cca_process();
+        /*Store TX handle*/
+        mac_tx_handle = tx_handle;
+        arm_exit_critical();
+    }
+
+    /*Return success*/
+    return 0;
+}
+
+/*
+ * \brief Function aborts CCA process.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_cca_abort(void)
+{
+    /*Clear RFF_CCA RF flag*/
+    rf_flags_clear(RFF_CCA);
+}
+
+
+
+/*
+ * \brief Function starts the transmission of the frame.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_start_tx(void)
+{
+    /*Only start transmitting from RX state*/
+    uint8_t trx_state = rf_if_read_trx_state();
+    if((trx_state != RX_AACK_ON) && (trx_state != RX_ON))
+    {
+        arm_net_phy_tx_done(rf_radio_driver_id, mac_tx_handle, PHY_LINK_CCA_FAIL, 1, 1);
+    }
+    else
+    {
+        /*RF state change: ->PLL_ON->RF_TX_START*/
+        rf_if_change_trx_state(FORCE_PLL_ON);
+        rf_flags_clear(RFF_RX);
+        rf_if_enable_tx_end_interrupt();
+        rf_flags_set(RFF_TX);
+        rf_if_change_trx_state(RF_TX_START);
+    }
+}
+
+/*
+ * \brief Function sets the RF in RX state.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_receive(void)
+{
+    uint16_t while_counter = 0;
+    if(rf_flags_check(RFF_ON) == 0)
+    {
+        rf_on();
+    }
+    /*If not yet in RX state set it*/
+    if(rf_flags_check(RFF_RX) == 0)
+    {
+        arm_enter_critical();
+        /*Wait while receiving data*/
+        while((rf_if_read_trx_state() == BUSY_RX) || (rf_if_read_trx_state() == BUSY_RX_AACK))
+        {
+            while_counter++;
+            if(while_counter == 0xffff)
+            {
+                break;
+            }
+        }
+        /*Wake up from sleep state*/
+        if(rf_if_read_trx_state() == 0x00 || rf_if_read_trx_state() == 0x1f)
+        {
+            rf_if_disable_slptr();
+            rf_poll_trx_state_change(TRX_OFF);
+        }
+
+        rf_if_change_trx_state(PLL_ON);
+        /*ACK is always received in RX_ON state to bypass address filters*/
+        if(rf_rx_mode)
+        {
+            rf_rx_mode = 0;
+            rf_if_change_trx_state(RX_ON);
+        }
+        else
+        {
+            rf_if_change_trx_state(RX_AACK_ON);
+            /*If calibration timer was unable to calibrate the RF, run calibration now*/
+            if(!rf_tuned)
+            {
+                /*Start calibration. This can be done in states TRX_OFF, PLL_ON or in any receive state*/
+                rf_if_calibration();
+                /*RF is tuned now*/
+                rf_tuned = 1;
+            }
+        }
+        rf_channel_set(rf_channel);
+        rf_flags_set(RFF_RX);
+        rf_if_enable_rx_end_interrupt();
+        /*Enable LNA if Front end used*/
+        if(rf_use_front_end)
+            rf_front_end_rx_lna();
+        arm_exit_critical();
+    }
+    /*Stop the running CCA process*/
+    if(rf_flags_check(RFF_CCA))
+        rf_cca_abort();
+}
+
+/*
+ * \brief Function calibrates the radio.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_calibration_cb(void)
+{
+    /*clear tuned flag to start tuning in rf_receive*/
+    rf_tuned = 0;
+    /*If RF is in default receive state, start calibration*/
+    if(rf_if_read_trx_state() == RX_AACK_ON)
+    {
+        arm_enter_critical();
+        /*Set RF in PLL_ON state*/
+        rf_if_change_trx_state(PLL_ON);
+        /*Set RF in TRX_OFF state to start PLL tuning*/
+        rf_if_change_trx_state(TRX_OFF);
+        /*Set RF in RX_ON state to calibrate*/
+        rf_if_change_trx_state(RX_ON);
+        /*Calibrate FTN*/
+        rf_if_calibration();
+        /*RF is tuned now*/
+        rf_tuned = 1;
+        /*Back to default receive state*/
+        rf_flags_clear(RFF_RX);
+        rf_receive();
+        arm_exit_critical();
+    }
+}
+
+/*
+ * \brief Function sets RF_ON flag when radio is powered.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_on(void)
+{
+    /*Set RFF_ON flag*/
+    if(rf_flags_check(RFF_ON) == 0)
+    {
+        rf_flags_set(RFF_ON);
+        /*Wake up Front end*/
+        if(rf_use_front_end)
+        {
+            /*Set PA_EXT_EN to enable controlling of external front end*/
+            rf_if_enable_pa_ext();
+            rf_front_end_rx_lna();
+        }
+        /*Enable Antenna diversity*/
+        if(rf_use_antenna_diversity)
+            /*Set ANT_EXT_SW_EN to enable controlling of antenna diversity*/
+            rf_if_enable_ant_div();
+    }
+}
+
+/*
+ * \brief Function handles the received ACK frame.
+ *
+ * \param seq_number Sequence number of received ACK
+ * \param data_pending Pending bit state in received ACK
+ *
+ * \return none
+ */
+void rf_handle_ack(uint8_t seq_number, uint8_t data_pending)
+{
+    phy_link_tx_status_e phy_status;
+    arm_enter_critical();
+    /*Received ACK sequence must be equal with transmitted packet sequence*/
+    if(tx_sequence == seq_number)
+    {
+        rf_ack_wait_timer_stop();
+        /*When data pending bit in ACK frame is set, inform NET library*/
+        if(data_pending)
+            phy_status =    PHY_LINK_TX_DONE_PENDING;
+        else
+            phy_status = PHY_LINK_TX_DONE;
+        /*Call PHY TX Done API*/
+        arm_net_phy_tx_done(rf_radio_driver_id, mac_tx_handle,phy_status, 1, 1);
+    }
+    arm_exit_critical();
+}
+
+/*
+ * \brief Function is a call back for RX end interrupt.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_handle_rx_end(void)
+{
+    uint8_t rf_lqi;
+
+    /*Frame received interrupt*/
+    if(rf_flags_check(RFF_RX))
+    {
+        /*Check CRC_valid bit*/
+        if(rf_if_check_crc())
+        {
+            uint8_t *rf_rx_ptr;
+            uint8_t receiving_ack = 0;
+            /*Read length*/
+            uint8_t len = rf_if_read_received_frame_length();
+            /*Not ACK frame*/
+            if(len > 5)
+            {
+                rf_rx_ptr = rf_buffer;
+            }
+            /*ACK received*/
+            else
+            {
+                /*Read ACK in static ACK buffer*/
+                receiving_ack = 1;
+                rf_rx_ptr = ack_rx_buf;
+            }
+            /*Check the length is valid*/
+            if(len > 1 && len < RF_BUFFER_SIZE)
+            {
+                /*Read received packet*/
+                rf_if_read_packet(rf_rx_ptr, len);
+                /*Get LQI*/
+                rf_lqi = rf_if_read_lqi();
+                /*Handle received ACK*/
+                if(receiving_ack && ((ack_rx_buf[0] & 0x07) == 0x02))
+                {
+                    uint8_t pending = 0;
+                    /*Check if data is pending*/
+                    if ((ack_rx_buf[0] & 0x10))
+                    {
+                        pending=1;
+                    }
+                    /*Send sequence number in ACK handler*/
+                    rf_handle_ack(ack_rx_buf[2], pending);
+                }
+                /*Handle received data*/
+                else if(rf_if_read_trx_state() != RX_ON && rf_if_read_trx_state() != BUSY_RX)
+                {
+                    arm_net_phy_rx(rf_buffer,len - 2, rf_lqi, rf_radio_driver_id);
+                }
+            }
+        }
+    }
+    /*Start receiver*/
+    rf_flags_clear(RFF_RX);
+    rf_receive();
+}
+
+/*
+ * \brief Function is called when MAC is shutting down the radio.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_shutdown(void)
+{
+    /*Call RF OFF*/
+    rf_off();
+    /*Clear RF flags*/
+    rf_flags_reset();
+}
+
+/*
+ * \brief Function is a call back for TX end interrupt.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_handle_tx_end(void)
+{
+    phy_link_tx_status_e phy_status = PHY_LINK_TX_SUCCESS;
+
+    rf_rx_mode = 0;
+    /*If ACK is needed for this transmission*/
+    if(need_ack && rf_flags_check(RFF_TX))
+    {
+        rf_ack_wait_timer_start(rf_ack_wait_duration);
+        rf_rx_mode = 1;
+    }
+    rf_flags_clear(RFF_RX);
+    /*Start receiver*/
+    rf_receive();
+
+    /*Call PHY TX Done API*/
+    arm_net_phy_tx_done(rf_radio_driver_id, mac_tx_handle, phy_status, 1, 1);
+}
+
+/*
+ * \brief Function is a call back for CCA ED done interrupt.
+ *
+ * \param none
+ *
+ * \return none
+ */
+void rf_handle_cca_ed_done(void)
+{
+    rf_flags_clear(RFF_CCA);
+    /*Check the result of CCA process*/
+    if(rf_if_check_cca())
+    {
+        rf_start_tx();
+    }
+    else
+    {
+        /*Send CCA fail notification*/
+        arm_net_phy_tx_done(rf_radio_driver_id, mac_tx_handle, PHY_LINK_CCA_FAIL, 1, 1);
+    }
+}
+
+/*
+ * \brief Function sets the TX power variable.
+ *
+ * \param power TX power setting
+ *
+ * \return 0 Success
+ * \return -1 Fail
+ */
+int8_t rf_tx_power_set(uint8_t power)
+{
+    int8_t ret_val = -1;
+    if(power < 16)
+    {
+        radio_tx_power = power;
+        ret_val = 0;
+    }
+    return ret_val;
+}
+
+/*
+ * \brief Function returns the TX power variable.
+ *
+ * \param none
+ *
+ * \return radio_tx_power TX power variable
+ */
+uint8_t rf_tx_power_get(void)
+{
+  return radio_tx_power;
+}
+
+/*
+ * \brief Function sets the RF RPC variable.
+ *
+ * \param rpc_value RPC setting
+ *
+ * \return 0 Success
+ */
+int8_t rf_rpc_set(uint8_t rpc_value)
+{
+    int8_t ret_val = -1;
+    radio_rpc_value = rpc_value;
+    ret_val = 0;
+    return ret_val;
+}
+
+/*
+ * \brief Function enables the usage of Front end.
+ *
+ * \param none
+ *
+ * \return 0 Success
+ */
+int8_t rf_enable_pa(void)
+{
+    int8_t ret_val = 0;
+    rf_use_front_end = 1;
+    return ret_val;
+}
+
+/*
+ * \brief Function enables the usage of Antenna diversity.
+ *
+ * \param none
+ *
+ * \return 0 Success
+ */
+int8_t rf_enable_antenna_diversity(void)
+{
+    int8_t ret_val = 0;
+    rf_use_antenna_diversity = 1;
+    return ret_val;
+}
+
+/*
+ * \brief Function defines the CSD pin of the Front end.
+ *
+ * \param port CSD port
+ * \param port CSD pin
+ *
+ * \return 0 Success
+ */
+int8_t rf_set_csd_pin(uint8_t port, uint8_t pin)
+{
+    int8_t ret_val = -1;
+
+    rf_csd_port = port;
+    rf_csd_pin = pin;
+    ret_val = 0;
+
+    return ret_val;
+}
+
+/*
+ * \brief Function defines the CPS pin of the Front end.
+ *
+ * \param port CPS port
+ * \param port CPS pin
+ *
+ * \return 0 Success
+ */
+int8_t rf_set_cps_pin(uint8_t port, uint8_t pin)
+{
+    int8_t ret_val = -1;
+
+    rf_cps_port = port;
+    rf_cps_pin = pin;
+    ret_val = 0;
+
+    return ret_val;
+}
+
+/*
+ * \brief Function gives the control of RF states to MAC.
+ *
+ * \param new_state RF state
+ * \param rf_channel RF channel
+ *
+ * \return 0 Success
+ */
+static int8_t rf_interface_state_control(phy_interface_state_e new_state, uint8_t rf_channel)
+{
+    int8_t ret_val = 0;
+    switch (new_state)
+    {
+        /*Reset PHY driver and set to idle*/
+        case PHY_INTERFACE_RESET:
+            break;
+        /*Disable PHY Interface driver*/
+        case PHY_INTERFACE_DOWN:
+            rf_shutdown();
+            break;
+        /*Enable PHY Interface driver*/
+        case PHY_INTERFACE_UP:
+            rf_channel_set(rf_channel);
+            rf_receive();
+            break;
+        /*Enable wireless interface ED scan mode*/
+        case PHY_INTERFACE_RX_ENERGY_STATE:
+            break;
+    }
+    return ret_val;
+}
+
+/*
+ * \brief Function controls the ACK pending, channel setting and energy detection.
+ *
+ * \param extension_type Type of control
+ * \param data_ptr Data from NET library
+ *
+ * \return 0 Success
+ */
+static int8_t rf_extension(phy_extension_type_e extension_type, uint8_t *data_ptr)
+{
+    switch (extension_type)
+    {
+        /*Control MAC pending bit for Indirect data transmission*/
+        case PHY_EXTENSION_CTRL_PENDING_BIT:
+            if(*data_ptr)
+            {
+                rf_if_ack_pending_ctrl(1);
+            }
+            else
+            {
+                rf_if_ack_pending_ctrl(0);
+            }
+            break;
+        /*Return frame pending status*/
+        case PHY_EXTENSION_READ_LAST_ACK_PENDING_STATUS:
+            *data_ptr = rf_if_last_acked_pending();
+            break;
+        /*Set channel*/
+        case PHY_EXTENSION_SET_CHANNEL:
+            break;
+        /*Read energy on the channel*/
+        case PHY_EXTENSION_READ_CHANNEL_ENERGY:
+            break;
+        /*Read status of the link*/
+        case PHY_EXTENSION_READ_LINK_STATUS:
+            break;
+    }
+    return 0;
+}
+
+/*
+ * \brief Function sets the addresses to RF address filters.
+ *
+ * \param address_type Type of address
+ * \param address_ptr Pointer to given address
+ *
+ * \return 0 Success
+ */
+static int8_t rf_address_write(phy_address_type_e address_type, uint8_t *address_ptr)
+{
+    int8_t ret_val = 0;
+    switch (address_type)
+    {
+        /*Set 48-bit address*/
+        case PHY_MAC_48BIT:
+            break;
+            /*Set 64-bit address*/
+        case PHY_MAC_64BIT:
+            rf_set_address(address_ptr);
+            break;
+        /*Set 16-bit address*/
+        case PHY_MAC_16BIT:
+            rf_set_short_adr(address_ptr);
+            break;
+        /*Set PAN Id*/
+        case PHY_MAC_PANID:
+            rf_set_pan_id(address_ptr);
+            break;
+    }
+    return ret_val;
+}
+
+/*
+ * \brief Function initialises the ACK wait time and returns the used PHY mode.
+ *
+ * \param none
+ *
+ * \return tmp Used PHY mode
+ */
+uint8_t rf_init_phy_mode(void)
+{
+    uint8_t tmp;
+    /*Read used PHY Mode*/
+    tmp = rf_if_read_register(TRX_CTRL_2);
+    /*Set ACK wait time for used data rate*/
+    if((tmp & 0x1f) == 0x00)
+    {
+        rf_ack_wait_duration = 938;
+        tmp = BPSK_20;
+    }
+    else if((tmp & 0x1f) == 0x04)
+    {
+        rf_ack_wait_duration = 469;
+        tmp = BPSK_40;
+    }
+    else if((tmp & 0x1f) == 0x14)
+    {
+        rf_ack_wait_duration = 469;
+        tmp = BPSK_40_ALT;
+    }
+    else if((tmp & 0x1f) == 0x08)
+    {
+        rf_ack_wait_duration = 100;
+        tmp = OQPSK_SIN_RC_100;
+    }
+    else if((tmp & 0x1f) == 0x09)
+    {
+        rf_ack_wait_duration = 50;
+        tmp = OQPSK_SIN_RC_200;
+    }
+    else if((tmp & 0x1f) == 0x18)
+    {
+        rf_ack_wait_duration = 100;
+        tmp = OQPSK_RC_100;
+    }
+    else if((tmp & 0x1f) == 0x19)
+    {
+        rf_ack_wait_duration = 50;
+        tmp = OQPSK_RC_200;
+    }
+    else if((tmp & 0x1f) == 0x0c)
+    {
+        rf_ack_wait_duration = 50;
+        tmp = OQPSK_SIN_250;
+    }
+    else if((tmp & 0x1f) == 0x0d)
+    {
+        rf_ack_wait_duration = 25;
+        tmp = OQPSK_SIN_500;
+    }
+    else if((tmp & 0x1f) == 0x0f)
+    {
+        rf_ack_wait_duration = 25;
+        tmp = OQPSK_SIN_500_ALT;
+    }
+    else if((tmp & 0x1f) == 0x1c)
+    {
+        rf_ack_wait_duration = 50;
+        tmp = OQPSK_RC_250;
+    }
+    else if((tmp & 0x1f) == 0x1d)
+    {
+        rf_ack_wait_duration = 25;
+        tmp = OQPSK_RC_500;
+    }
+    else if((tmp & 0x1f) == 0x1f)
+    {
+        rf_ack_wait_duration = 25;
+        tmp = OQPSK_RC_500_ALT;
+    }
+    else if((tmp & 0x3f) == 0x2A)
+    {
+        rf_ack_wait_duration = 25;
+        tmp = OQPSK_SIN_RC_400_SCR_ON;
+    }
+    else if((tmp & 0x3f) == 0x0A)
+    {
+        rf_ack_wait_duration = 25;
+        tmp = OQPSK_SIN_RC_400_SCR_OFF;
+    }
+    else if((tmp & 0x3f) == 0x3A)
+    {
+        rf_ack_wait_duration = 25;
+        tmp = OQPSK_RC_400_SCR_ON;
+    }
+    else if((tmp & 0x3f) == 0x1A)
+    {
+        rf_ack_wait_duration = 25;
+        tmp = OQPSK_RC_400_SCR_OFF;
+    }
+    else if((tmp & 0x3f) == 0x2E)
+    {
+        rf_ack_wait_duration = 13;
+        tmp = OQPSK_SIN_1000_SCR_ON;
+    }
+    else if((tmp & 0x3f) == 0x0E)
+    {
+        rf_ack_wait_duration = 13;
+        tmp = OQPSK_SIN_1000_SCR_OFF;
+    }
+    else if((tmp & 0x3f) == 0x3E)
+    {
+        rf_ack_wait_duration = 13;
+        tmp = OQPSK_RC_1000_SCR_ON;
+    }
+    else if((tmp & 0x3f) == 0x1E)
+    {
+        rf_ack_wait_duration = 13;
+        tmp = OQPSK_RC_1000_SCR_OFF;
+    }
+    return tmp;
+}
+