cc2538 RF Driver

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
	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_promiscous_mode (char p)
	Turn promiscous mode on or off. More...
void	cc2538_rf_set_addr (uint16_t pan)
	Sets addresses and PAN identifier to the relevant RF hardware registers. More...

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

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 1001 of file cc2538-rf.c.

References process_poll(), RFCORE_SFR_RFERRF, and RFCORE_SFR_RFERRF_RXOVERF.

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 972 of file cc2538-rf.c.

References process_poll(), and RFCORE_SFR_RFIRQF0.

void cc2538_rf_set_addr

(

uint16_t

pan

)

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

Parameters

pan	The 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.

void cc2538_rf_set_promiscous_mode

(

char

p

)

Turn promiscous mode on or off.

Parameters

p	If promiscous mode should be on (1) or off (0)

This function turns promiscous mode on or off. In promiscous mode, every received frame is returned from the RF core. In non-promiscous mode, only broadcast frames or frames with our address as the receive address are returned from the RF core.

Definition at line 1020 of file cc2538-rf.c.

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 935 of file cc2538-rf.c.

References radio_driver::off, packetbuf_clear(), packetbuf_dataptr(), packetbuf_set_datalen(), PACKETBUF_SIZE, PROCESS_BEGIN, PROCESS_END, PROCESS_YIELD_UNTIL, and radio_driver::read.