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Implement extended RF API for the CC2538

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This commit is contained in:
George Oikonomou 2014-04-13 15:43:32 +01:00 committed by Niclas Finne
parent 132b8dde3b
commit 0ec1eda75e
2 changed files with 297 additions and 75 deletions
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330
cpu/cc2538/dev/cc2538-rf.c
View file

@ -126,10 +126,39 @@ static uint8_t rf_flags;
static int on(void);
static int off(void);
/*---------------------------------------------------------------------------*/
/* TX Power dBm lookup table. Values from SmartRF Studio v1.16.0 */
typedef struct output_config {
radio_value_t power;
uint8_t txpower_val;
} output_config_t;
static const output_config_t output_power[] = {
{ 7, 0xFF },
{ 5, 0xED },
{ 3, 0xD5 },
{ 1, 0xC5 },
{ 0, 0xB6 },
{ -1, 0xB0 },
{ -3, 0xA1 },
{ -5, 0x91 },
{ -7, 0x88 },
{ -9, 0x72 },
{-11, 0x62 },
{-13, 0x58 },
{-15, 0x42 },
{-24, 0x00 },
};
#define OUTPUT_CONFIG_COUNT (sizeof(output_power) / sizeof(output_config_t))
/*---------------------------------------------------------------------------*/
PROCESS(cc2538_rf_process, "cc2538 RF driver");
/*---------------------------------------------------------------------------*/
uint8_t
cc2538_rf_channel_get()
/**
* \brief Get the current operating channel
* \return Returns a value in [11,26] representing the current channel
*/
static uint8_t
get_channel()
{
uint8_t chan = REG(RFCORE_XREG_FREQCTRL) & RFCORE_XREG_FREQCTRL_FREQ;
@ -137,13 +166,19 @@ cc2538_rf_channel_get()
+ CC2538_RF_CHANNEL_MIN);
}
/*---------------------------------------------------------------------------*/
int8_t
cc2538_rf_channel_set(uint8_t channel)
/**
* \brief Set the current operating channel
* \param channel The desired channel as a value in [11,26]
* \return Returns a value in [11,26] representing the current channel
* or a negative value if \e channel was out of bounds
*/
static int8_t
set_channel(uint8_t channel)
{
PRINTF("RF: Set Channel\n");
if((channel < CC2538_RF_CHANNEL_MIN) || (channel > CC2538_RF_CHANNEL_MAX)) {
return -1;
return CC2538_RF_CHANNEL_SET_ERROR;
}
/* Changes to FREQCTRL take effect after the next recalibration */
@ -155,41 +190,43 @@ cc2538_rf_channel_set(uint8_t channel)
return (int8_t) channel;
}
/*---------------------------------------------------------------------------*/
uint8_t
cc2538_rf_power_set(uint8_t new_power)
static radio_value_t
get_pan_id(void)
{
PRINTF("RF: Set Power\n");
REG(RFCORE_XREG_TXPOWER) = new_power;
return (REG(RFCORE_XREG_TXPOWER) & 0xFF);
return (radio_value_t)(REG(RFCORE_FFSM_PAN_ID1) << 8 | REG(RFCORE_FFSM_PAN_ID0));
}
/*---------------------------------------------------------------------------*/
/* ToDo: Check once we have info on the... infopage */
void
cc2538_rf_set_addr(uint16_t pan)
static void
set_pan_id(uint16_t pan)
{
#if LINKADDR_SIZE==8
/* EXT_ADDR[7:0] is ignored when using short addresses */
int i;
for(i = (LINKADDR_SIZE - 1); i >= 0; --i) {
((uint32_t *)RFCORE_FFSM_EXT_ADDR0)[i] =
linkaddr_node_addr.u8[LINKADDR_SIZE - 1 - i];
}
#endif
REG(RFCORE_FFSM_PAN_ID0) = pan & 0xFF;
REG(RFCORE_FFSM_PAN_ID1) = pan >> 8;
REG(RFCORE_FFSM_SHORT_ADDR0) = linkaddr_node_addr.u8[LINKADDR_SIZE - 1];
REG(RFCORE_FFSM_SHORT_ADDR1) = linkaddr_node_addr.u8[LINKADDR_SIZE - 2];
}
/*---------------------------------------------------------------------------*/
int
cc2538_rf_read_rssi(void)
static radio_value_t
get_short_addr(void)
{
int rssi;
return (radio_value_t)(REG(RFCORE_FFSM_SHORT_ADDR1) << 8 | REG(RFCORE_FFSM_SHORT_ADDR0));
}
/*---------------------------------------------------------------------------*/
static void
set_short_addr(uint16_t addr)
{
REG(RFCORE_FFSM_SHORT_ADDR0) = addr & 0xFF;
REG(RFCORE_FFSM_SHORT_ADDR1) = addr >> 8;
}
/*---------------------------------------------------------------------------*/
/**
* \brief Reads the current signal strength (RSSI)
* \return The current RSSI in dBm
*
* This function reads the current RSSI on the currently configured
* channel.
*/
static radio_value_t
get_rssi(void)
{
int8_t rssi;
/* If we are off, turn on first */
if((REG(RFCORE_XREG_FSMSTAT0) & RFCORE_XREG_FSMSTAT0_FSM_FFCTRL_STATE) == 0) {
@ -200,7 +237,7 @@ cc2538_rf_read_rssi(void)
/* Wait on RSSI_VALID */
while((REG(RFCORE_XREG_RSSISTAT) & RFCORE_XREG_RSSISTAT_RSSI_VALID) == 0);
rssi = ((int8_t)REG(RFCORE_XREG_RSSI)) - RSSI_OFFSET;
rssi = (int8_t)(REG(RFCORE_XREG_RSSI) & RFCORE_XREG_RSSI_RSSI_VAL) - RSSI_OFFSET;
/* If we were off, turn back off */
if((rf_flags & WAS_OFF) == WAS_OFF) {
@ -211,6 +248,80 @@ cc2538_rf_read_rssi(void)
return rssi;
}
/*---------------------------------------------------------------------------*/
/* Returns the current CCA threshold in dBm */
static radio_value_t
get_cca_threshold(void)
{
return (int8_t)(REG(RFCORE_XREG_CCACTRL0) & RFCORE_XREG_CCACTRL0_CCA_THR) - RSSI_OFFSET;
}
/*---------------------------------------------------------------------------*/
/* Sets the CCA threshold in dBm */
static void
set_cca_threshold(radio_value_t value)
{
REG(RFCORE_XREG_CCACTRL0) = (value & 0xFF) + RSSI_OFFSET;
}
/*---------------------------------------------------------------------------*/
/* Returns the current TX power in dBm */
static radio_value_t
get_tx_power(void)
{
int i;
uint8_t reg_val = REG(RFCORE_XREG_TXPOWER) & 0xFF;
/*
* Find the TXPOWER value in the lookup table
* If the value has been written with set_tx_power, we should be able to
* find the exact value. However, in case the register has been written in
* a different fashion, we return the immediately lower value of the lookup
*/
for(i = 0; i < OUTPUT_CONFIG_COUNT; i++) {
if(reg_val >= output_power[i].txpower_val) {
return output_power[i].power;
}
}
return CC2538_RF_TX_POWER_MIN;
}
/*---------------------------------------------------------------------------*/
/*
* Set TX power to 'at least' power dBm
* This works with a lookup table. If the value of 'power' does not exist in
* the lookup table, TXPOWER will be set to the immediately higher available
* value
*/
static void
set_tx_power(radio_value_t power)
{
int i;
for(i = OUTPUT_CONFIG_COUNT - 1; i >= 0; --i) {
if(power <= output_power[i].power) {
REG(RFCORE_XREG_TXPOWER) = output_power[i].txpower_val;
return;
}
}
}
/*---------------------------------------------------------------------------*/
static void
set_frame_filtering(uint8_t enable)
{
if(enable) {
REG(RFCORE_XREG_FRMFILT0) |= RFCORE_XREG_FRMFILT0_FRAME_FILTER_EN;
} else {
REG(RFCORE_XREG_FRMFILT0) &= ~RFCORE_XREG_FRMFILT0_FRAME_FILTER_EN;
}
}
/*---------------------------------------------------------------------------*/
static void
set_auto_ack(uint8_t enable)
{
if(enable) {
REG(RFCORE_XREG_FRMCTRL0) |= RFCORE_XREG_FRMCTRL0_AUTOACK;
} else {
REG(RFCORE_XREG_FRMCTRL0) &= ~RFCORE_XREG_FRMCTRL0_AUTOACK;
}
}
/*---------------------------------------------------------------------------*/
/* Netstack API radio driver functions */
/*---------------------------------------------------------------------------*/
static int
@ -327,8 +438,10 @@ init(void)
/* MAX FIFOP threshold */
REG(RFCORE_XREG_FIFOPCTRL) = CC2538_RF_MAX_PACKET_LEN;
cc2538_rf_power_set(CC2538_RF_TX_POWER);
cc2538_rf_channel_set(CC2538_RF_CHANNEL);
/* Set TX Power */
REG(RFCORE_XREG_TXPOWER) = CC2538_RF_TX_POWER;
set_channel(CC2538_RF_CHANNEL);
/* Acknowledge RF interrupts, FIFOP only */
REG(RFCORE_XREG_RFIRQM0) |= RFCORE_XREG_RFIRQM0_FIFOP;
@ -641,24 +754,150 @@ pending_packet(void)
static radio_result_t
get_value(radio_param_t param, radio_value_t *value)
{
if(!value) {
return RADIO_RESULT_INVALID_VALUE;
}
switch(param) {
case RADIO_PARAM_POWER_MODE:
*value = (REG(RFCORE_XREG_RXENABLE) && RFCORE_XREG_RXENABLE_RXENMASK) == 0
? RADIO_POWER_MODE_OFF : RADIO_POWER_MODE_ON;
return RADIO_RESULT_OK;
case RADIO_PARAM_CHANNEL:
*value = (radio_value_t)get_channel();
return RADIO_RESULT_OK;
case RADIO_PARAM_PAN_ID:
*value = get_pan_id();
return RADIO_RESULT_OK;
case RADIO_PARAM_16BIT_ADDR:
*value = get_short_addr();
return RADIO_RESULT_OK;
case RADIO_PARAM_RX_MODE:
*value = 0;
if(REG(RFCORE_XREG_FRMFILT0) & RFCORE_XREG_FRMFILT0_FRAME_FILTER_EN) {
*value |= RADIO_RX_MODE_ADDRESS_FILTER;
}
if(REG(RFCORE_XREG_FRMCTRL0) & RFCORE_XREG_FRMCTRL0_AUTOACK) {
*value |= RADIO_RX_MODE_AUTOACK;
}
return RADIO_RESULT_OK;
case RADIO_PARAM_TXPOWER:
*value = get_tx_power();
return RADIO_RESULT_OK;
case RADIO_PARAM_CCA_THRESHOLD:
*value = get_cca_threshold();
return RADIO_RESULT_OK;
case RADIO_PARAM_RSSI:
*value = get_rssi();
return RADIO_RESULT_OK;
case RADIO_CONST_CHANNEL_MIN:
*value = CC2538_RF_CHANNEL_MIN;
return RADIO_RESULT_OK;
case RADIO_CONST_CHANNEL_MAX:
*value = CC2538_RF_CHANNEL_MAX;
return RADIO_RESULT_OK;
case RADIO_CONST_TXPOWER_MIN:
*value = CC2538_RF_TX_POWER_MIN;
return RADIO_RESULT_OK;
case RADIO_CONST_TXPOWER_MAX:
*value = CC2538_RF_TX_POWER_MAX;
return RADIO_RESULT_OK;
default:
return RADIO_RESULT_NOT_SUPPORTED;
}
}
/*---------------------------------------------------------------------------*/
static radio_result_t
set_value(radio_param_t param, radio_value_t value)
{
switch(param) {
case RADIO_PARAM_POWER_MODE:
if(value == RADIO_POWER_MODE_ON) {
on();
return RADIO_RESULT_OK;
}
if(value == RADIO_POWER_MODE_OFF) {
off();
return RADIO_RESULT_OK;
}
return RADIO_RESULT_INVALID_VALUE;
case RADIO_PARAM_CHANNEL:
if(value < CC2538_RF_CHANNEL_MIN ||
value > CC2538_RF_CHANNEL_MAX) {
return RADIO_RESULT_INVALID_VALUE;
}
if(set_channel(value) == CC2538_RF_CHANNEL_SET_ERROR) {
return RADIO_RESULT_ERROR;
}
return RADIO_RESULT_OK;
case RADIO_PARAM_PAN_ID:
set_pan_id(value & 0xffff);
return RADIO_RESULT_OK;
case RADIO_PARAM_16BIT_ADDR:
set_short_addr(value & 0xffff);
return RADIO_RESULT_OK;
case RADIO_PARAM_RX_MODE:
if(value & ~(RADIO_RX_MODE_ADDRESS_FILTER |
RADIO_RX_MODE_AUTOACK)) {
return RADIO_RESULT_INVALID_VALUE;
}
set_frame_filtering((value & RADIO_RX_MODE_ADDRESS_FILTER) != 0);
set_auto_ack((value & RADIO_RX_MODE_AUTOACK) != 0);
return RADIO_RESULT_OK;
case RADIO_PARAM_TXPOWER:
if(value < CC2538_RF_TX_POWER_MIN || value > CC2538_RF_TX_POWER_MAX) {
return RADIO_RESULT_INVALID_VALUE;
}
set_tx_power(value);
return RADIO_RESULT_OK;
case RADIO_PARAM_CCA_THRESHOLD:
set_cca_threshold(value);
return RADIO_RESULT_OK;
default:
return RADIO_RESULT_NOT_SUPPORTED;
}
}
/*---------------------------------------------------------------------------*/
static radio_result_t
get_object(radio_param_t param, void *dest, size_t size)
{
uint8_t *target;
int i;
if(param == RADIO_PARAM_64BIT_ADDR) {
if(size < 8 || !dest || LINKADDR_SIZE != 8) {
return RADIO_RESULT_INVALID_VALUE;
}
target = dest;
for(i = 0; i < size; i++) {
target[size - 1 - i] = ((uint32_t *)RFCORE_FFSM_EXT_ADDR0)[i] & 0xFF;
}
return RADIO_RESULT_OK;
}
return RADIO_RESULT_NOT_SUPPORTED;
}
/*---------------------------------------------------------------------------*/
static radio_result_t
set_object(radio_param_t param, const void *src, size_t size)
{
int i;
if(param == RADIO_PARAM_64BIT_ADDR) {
if(size < 8 || !src || LINKADDR_SIZE != 8) {
return RADIO_RESULT_INVALID_VALUE;
}
for(i = 0; i < size; i++) {
((uint32_t *)RFCORE_FFSM_EXT_ADDR0)[i] = ((uint8_t *)src)[size - 1 - i];
}
return RADIO_RESULT_OK;
}
return RADIO_RESULT_NOT_SUPPORTED;
}
/*---------------------------------------------------------------------------*/
@ -776,11 +1015,26 @@ cc2538_rf_err_isr(void)
void
cc2538_rf_set_promiscous_mode(char p)
{
if(p) {
REG(RFCORE_XREG_FRMFILT0) &= ~RFCORE_XREG_FRMFILT0_FRAME_FILTER_EN;
} else {
REG(RFCORE_XREG_FRMFILT0) |= RFCORE_XREG_FRMFILT0_FRAME_FILTER_EN;
set_frame_filtering(p);
}
/*---------------------------------------------------------------------------*/
void
cc2538_rf_set_addr(uint16_t pan)
{
#if LINKADDR_SIZE == 8
/* EXT_ADDR[7:0] is ignored when using short addresses */
int i;
for(i = (LINKADDR_SIZE - 1); i >= 0; --i) {
((uint32_t *)RFCORE_FFSM_EXT_ADDR0)[i] =
linkaddr_node_addr.u8[LINKADDR_SIZE - 1 - i];
}
#endif
set_pan_id(pan);
REG(RFCORE_FFSM_SHORT_ADDR0) = linkaddr_node_addr.u8[LINKADDR_SIZE - 1];
REG(RFCORE_FFSM_SHORT_ADDR1) = linkaddr_node_addr.u8[LINKADDR_SIZE - 2];
}
/*---------------------------------------------------------------------------*/
/** @} */

38
cpu/cc2538/dev/cc2538-rf.h
View file

@ -56,10 +56,13 @@
#define CC2538_RF_CHANNEL_MIN 11
#define CC2538_RF_CHANNEL_MAX 26
#define CC2538_RF_CHANNEL_SPACING 5
#define CC2538_RF_CHANNEL_SET_ERROR -1
#define CC2538_RF_MAX_PACKET_LEN 127
#define CC2538_RF_MIN_PACKET_LEN 4
#define CC2538_RF_CCA_CLEAR 1
#define CC2538_RF_CCA_BUSY 0
#define CC2538_RF_TX_POWER_MIN -24
#define CC2538_RF_TX_POWER_MAX 7
/*---------------------------------------------------------------------------*/
#ifdef CC2538_RF_CONF_TX_POWER
#define CC2538_RF_TX_POWER CC2538_RF_CONF_TX_POWER
@ -132,31 +135,6 @@
/** The NETSTACK data structure for the cc2538 RF driver */
extern const struct radio_driver cc2538_rf_driver;
/*---------------------------------------------------------------------------*/
/**
* \brief Set the current operating channel
* \param channel The desired channel as a value in [11,26]
* \return Returns a value in [11,26] representing the current channel
* or a negative value if \e channel was out of bounds
*/
int8_t cc2538_rf_channel_set(uint8_t channel);
/**
* \brief Get the current operating channel
* \return Returns a value in [11,26] representing the current channel
*/
uint8_t cc2538_rf_channel_get(void);
/**
* \brief Sets RF TX power
* \param new_power The desired power level
* \return The power level in use after the adjustment
*
* The value specified in \e new_power will be written directly to the
* RFCORE_XREG_TXPOWER register. See the datasheet for more details on
* possible values.
*/
uint8_t cc2538_rf_power_set(uint8_t new_power);
/**
* \brief Sets addresses and PAN identifier to the relevant RF hardware
* registers
@ -168,15 +146,6 @@ uint8_t cc2538_rf_power_set(uint8_t new_power);
*/
void cc2538_rf_set_addr(uint16_t pan);
/**
* \brief Reads the current signal strength (RSSI)
* \return The current RSSI
*
* This function reads the current RSSI on the currently configured
* channel.
*/
int cc2538_rf_read_rssi(void);
/**
* \brief Turn promiscous mode on or off
* \param p If promiscous mode should be on (1) or off (0)
@ -187,7 +156,6 @@ int cc2538_rf_read_rssi(void);
* address as the receive address are returned from the RF core.
*/
void cc2538_rf_set_promiscous_mode(char p);
/*---------------------------------------------------------------------------*/
#endif /* CC2538_RF_H__ */