Contiki-NG
Files | Macros | Functions | Variables

Driver implementation for the cc2538 RF transceiver. More...

Files

file  cc2538-rf.c
 Implementation of the cc2538 RF driver.
 
file  cc2538-rf.h
 Header file for the cc2538 RF driver.
 

Macros

#define CC2538_RF_CSP_ISRXON()   do { REG(RFCORE_SFR_RFST) = CC2538_RF_CSP_OP_ISRXON; } while(0)
 Send an RX ON command strobe to the CSP.
 
#define CC2538_RF_CSP_ISTXON()   do { REG(RFCORE_SFR_RFST) = CC2538_RF_CSP_OP_ISTXON; } while(0)
 Send a TX ON command strobe to the CSP.
 
#define CC2538_RF_CSP_ISRFOFF()   do { REG(RFCORE_SFR_RFST) = CC2538_RF_CSP_OP_ISRFOFF; } while(0)
 Send a RF OFF command strobe to the CSP.
 
#define CC2538_RF_CSP_ISFLUSHRX()
 Flush the RX FIFO.
 
#define CC2538_RF_CSP_ISFLUSHTX()
 Flush the TX FIFO.
 

Functions

static uint8_t get_channel ()
 Get the current operating channel. More...
 
static void set_channel (uint8_t channel)
 Set the current operating channel. More...
 
static radio_value_t get_rssi (void)
 Reads the current signal strength (RSSI) More...
 
static int init (void)
 
 PROCESS_THREAD (cc2538_rf_process, ev, data)
 Implementation of the cc2538 RF driver process. More...
 
void cc2538_rf_rx_tx_isr (void)
 The cc2538 RF RX/TX ISR. More...
 
void cc2538_rf_err_isr (void)
 The cc2538 RF Error ISR. More...
 
void cc2538_rf_set_addr (uint16_t pan)
 Sets addresses and PAN identifier to the relevant RF hardware registers. More...
 

Variables

const struct radio_driver cc2538_rf_driver
 The NETSTACK data structure for the cc2538 RF driver.
 
const struct radio_driver cc2538_rf_driver
 The NETSTACK data structure for the cc2538 RF driver.
 

Detailed Description

Driver implementation for the cc2538 RF transceiver.

Function Documentation

◆ cc2538_rf_err_isr()

void cc2538_rf_err_isr ( void  )

The cc2538 RF Error ISR.

This is the interrupt service routine for all RF errors. We acknowledge every error type and instead of trying to be smart and act differently depending on error condition, we simply reset the transceiver. RX FIFO overflow is an exception, we ignore this error since read() handles it anyway.

However, we don't want to reset within this ISR. If the error occurs while we are reading a frame out of the FIFO, trashing the FIFO in the middle of read(), would result in further errors (RX underflows).

Instead, we set a flag and poll the driver process. The process will reset the transceiver without any undesirable consequences.

Definition at line 1175 of file cc2538-rf.c.

◆ cc2538_rf_rx_tx_isr()

void cc2538_rf_rx_tx_isr ( void  )

The cc2538 RF RX/TX ISR.

This is the interrupt service routine for all RF interrupts relating to RX and TX. Error conditions are handled by cc2538_rf_err_isr(). Currently, we only acknowledge the FIFOP interrupt source.

Definition at line 1148 of file cc2538-rf.c.

◆ cc2538_rf_set_addr()

void cc2538_rf_set_addr ( uint16_t  pan)

Sets addresses and PAN identifier to the relevant RF hardware registers.

Parameters
panThe PAN Identifier

Values for short and extended addresses are not needed as parameters since they exist in the linkaddr buffer in the contiki core. They are thus simply copied over from there.

◆ get_channel()

static uint8_t get_channel ( void  )
static

Get the current operating channel.

Returns
Returns a value in [11,26] representing the current channel

Definition at line 158 of file cc2538-rf.c.

◆ get_rssi()

static radio_value_t get_rssi ( void  )
static

Reads the current signal strength (RSSI)

Returns
The current RSSI in dBm

This function reads the current RSSI on the currently configured channel.

Definition at line 226 of file cc2538-rf.c.

◆ init()

static int init ( void  )
static

TX anti-aliasing filter bandwidth

AGC target value

Bias currents

Tune frequency calibration

Definition at line 514 of file cc2538-rf.c.

◆ PROCESS_THREAD()

PROCESS_THREAD ( cc2538_rf_process  ,
ev  ,
data   
)

Implementation of the cc2538 RF driver process.

This process is started by init(). It simply sits there waiting for an event. Upon frame reception, the RX ISR will poll this process. Subsequently, the contiki core will generate an event which will call this process so that the received frame can be picked up from the RF RX FIFO

Definition at line 1097 of file cc2538-rf.c.

◆ set_channel()

static void set_channel ( uint8_t  channel)
static

Set the current operating channel.

Parameters
channelThe desired channel as a value in [11,26]

Definition at line 168 of file cc2538-rf.c.