Contiki-NG
|
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. | |
static void | set_channel (uint8_t channel) |
Set the current operating channel. | |
static radio_value_t | get_rssi (void) |
Reads the current signal strength (RSSI) | |
static void | get_iq_lsbs (radio_value_t *value) |
Reads the current I/Q data of the received signal. | |
static int | init (void) |
PROCESS_THREAD (cc2538_rf_process, ev, data) | |
Implementation of the cc2538 RF driver process. | |
void | cc2538_rf_rx_tx_isr (void) |
The cc2538 RF RX/TX ISR. | |
void | cc2538_rf_err_isr (void) |
The cc2538 RF Error ISR. | |
void | cc2538_rf_set_addr (uint16_t pan) |
Sets addresses and PAN identifier to the relevant RF hardware registers. | |
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. | |
Driver implementation for the cc2538 RF transceiver
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 1228 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 1201 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.
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.
|
static |
Get the current operating channel.
Definition at line 166 of file cc2538-rf.c.
|
static |
Reads the current I/Q data of the received signal.
value | The least significant bit (LSB) of the I coordinate and the LSB of the Q coordinate are concatenated and stored here. |
If not done already, this function first enables the RX mode and waits for the RSSI_VALID bit to go high. Hence, this function should only be called at start up or by the MAC protocol to avoid conflicts.
Definition at line 269 of file cc2538-rf.c.
References RFCORE_XREG_FSMSTAT0, RFCORE_XREG_FSMSTAT0_FSM_FFCTRL_STATE, RFCORE_XREG_RFRND, RFCORE_XREG_RFRND_IRND, RFCORE_XREG_RFRND_QRND, RFCORE_XREG_RSSISTAT, and RFCORE_XREG_RSSISTAT_RSSI_VALID.
|
static |
Reads the current signal strength (RSSI)
This function reads the current RSSI on the currently configured channel.
Definition at line 234 of file cc2538-rf.c.
References RFCORE_XREG_FSMSTAT0, RFCORE_XREG_FSMSTAT0_FSM_FFCTRL_STATE, and RFCORE_XREG_RSSI.
|
static |
TX anti-aliasing filter bandwidth
AGC target value
Bias currents
Tune frequency calibration
Definition at line 555 of file cc2538-rf.c.
References CC2538_RF_CONF_RX_DMA_CHAN, CC2538_RF_CONF_RX_USE_DMA, CC2538_RF_CONF_TX_DMA_CHAN, CC2538_RF_CONF_TX_USE_DMA, iq_seeder_seed(), process_start(), RADIO_SHR_SEARCH_EN, RF_ERR_IRQn, RFCORE_SFR_RFDATA, RFCORE_XREG_AGCCTRL1, RFCORE_XREG_CCACTRL0, RFCORE_XREG_FIFOPCTRL, RFCORE_XREG_FRMCTRL0, RFCORE_XREG_FRMCTRL0_AUTOACK, RFCORE_XREG_FRMCTRL0_AUTOCRC, RFCORE_XREG_FSCAL1, RFCORE_XREG_RFERRM, RFCORE_XREG_RFERRM_RFERRM, RFCORE_XREG_SRCMATCH, RFCORE_XREG_TXFILTCFG, RFCORE_XREG_TXPOWER, set_channel(), SYS_CTRL_DCGCRFC, SYS_CTRL_RCGCRFC, SYS_CTRL_SCGCRFC, udma_channel_mask_set(), udma_set_channel_dst(), and udma_set_channel_src().
Referenced by 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 1151 of file cc2538-rf.c.
References init(), mac_driver::input, radio_driver::off, radio_driver::on, packetbuf_clear(), packetbuf_dataptr(), packetbuf_set_datalen(), PACKETBUF_SIZE, PROCESS_BEGIN, PROCESS_END, PROCESS_YIELD_UNTIL, radio_driver::read, RFCORE_XREG_FSMSTAT0, and RFCORE_XREG_FSMSTAT0_FSM_FFCTRL_STATE.
|
static |
Set the current operating channel.
channel | The desired channel as a value in [11,26] |
Definition at line 176 of file cc2538-rf.c.
References RFCORE_XREG_FREQCTRL, RFCORE_XREG_FSMSTAT0, and RFCORE_XREG_FSMSTAT0_FSM_FFCTRL_STATE.
Referenced by init().