/*!
* This function configures the hardware SPI for the currrent client.
* Lock must be taken
*
* @param mod the module number
* @param client_config client hardware configuration.
* @return This function returns 0 if successful, -EPERM otherwise.
*/
static int spi_hard_config(module_nb_t mod, spi_config * client_config)
{
int error = 0;
error = spi_set_baudrate(mod, client_config->bit_rate);
if (error < 0) {
return error;
}
spi_set_transfer_length(mod, client_config->bit_count);
error = spi_select_ss(mod, client_config->ss_asserted);
if (error < 0) {
return error;
}
if (client_config->master_mode == true) {
spi_set_mode(mod, SPI_MASTER);
} else {
spi_set_mode(mod, SPI_SLAVE);
}
if (client_config->active_high_ss_polarity == true) {
spi_set_ss_polarity(mod, SPI_SS_ACTIVE_HIGH);
} else {
spi_set_ss_polarity(mod, SPI_SS_ACTIVE_LOW);
}
if (client_config->ss_low_between_bursts == true) {
spi_set_ss_waveform(mod, SPI_LOW_BTN_BURST);
} else {
spi_set_ss_waveform(mod, SPI_PULSE_BTN_BURST);
}
if (client_config->phase == true) {
spi_set_phase(mod, SPI_PHASE_1);
} else {
spi_set_phase(mod, SPI_PHASE_0);
}
if (client_config->active_high_polarity == true) {
spi_set_polarity(mod, SPI_POLARITY_ACTIVE_HIGH);
} else {
spi_set_polarity(mod, SPI_POLARITY_ACTIVE_LOW);
}
return 0;
}
/**
* \brief Init the radio
* \return Returns success/fail
* \retval 0 Success
*/
int rf233_init(void) {
volatile uint8_t regtemp;
volatile uint8_t radio_state; /* don't optimize this away, it's important */
PRINTF("RF233: init.\n");
/* init SPI and GPIOs, wake up from sleep/power up. */
spi_init();
// RF233 expects line low for CS, this is default SAM4L behavior
//spi_set_chip_select(3);
// POL = 0 means idle is low
spi_set_chip_select(3);
spi_set_polarity(0);
// PHASE = 0 means sample leading edge
spi_set_phase(0);
spi_set_rate(400000);
/* reset will put us into TRX_OFF state */
/* reset the radio core */
gpio_enable_output(RST_PIN);
gpio_enable_output(SLP_PIN);
gpio_clear(RST_PIN);
delay_ms(1);
gpio_set(RST_PIN);
gpio_clear(SLP_PIN); /* be awake from sleep*/
/* Read the PART_NUM register to verify that the radio is
* working/responding. Could check in software, I just look at
* the bus. If this is working, the first write should be 0x9C x00
* and the return bytes should be 0x00 0x0B. - pal*/
regtemp = trx_reg_read(RF233_REG_PART_NUM);
/* before enabling interrupts, make sure we have cleared IRQ status */
regtemp = trx_reg_read(RF233_REG_IRQ_STATUS);
PRINTF("RF233: After wake from sleep\n");
radio_state = rf233_status();
PRINTF("RF233: Radio state 0x%04x\n", radio_state);
calibrate_filters();
if (radio_state == STATE_P_ON) {
trx_reg_write(RF233_REG_TRX_STATE, TRXCMD_TRX_OFF);
}
/* Assign regtemp to regtemp to avoid compiler warnings */
regtemp = regtemp;
// Set up interrupts
gpio_interrupt_callback(interrupt_callback, NULL);
gpio_enable_input(RADIO_IRQ, PullNone);
gpio_clear(RADIO_IRQ);
gpio_enable_interrupt(RADIO_IRQ, PullNone, RisingEdge);
/* Configure the radio using the default values except these. */
trx_reg_write(RF233_REG_TRX_CTRL_1, RF233_REG_TRX_CTRL_1_CONF);
trx_reg_write(RF233_REG_PHY_CC_CCA, RF233_REG_PHY_CC_CCA_CONF);
trx_reg_write(RF233_REG_PHY_TX_PWR, RF233_REG_PHY_TX_PWR_CONF);
trx_reg_write(RF233_REG_TRX_CTRL_2, RF233_REG_TRX_CTRL_2_CONF);
trx_reg_write(RF233_REG_IRQ_MASK, RF233_REG_IRQ_MASK_CONF);
trx_reg_write(RF233_REG_XAH_CTRL_1, 0x02);
trx_bit_write(SR_MAX_FRAME_RETRIES, 0);
trx_bit_write(SR_MAX_CSMA_RETRIES, 0);
PRINTF("RF233: Configured transciever.\n");
{
uint8_t addr[8];
addr[0] = 0x22;
addr[1] = 0x22;
addr[2] = 0x22;
addr[3] = 0x22;
addr[4] = 0x22;
addr[5] = 0x22;
addr[6] = 0x22;
addr[7] = 0x22;
SetPanId(IEEE802154_CONF_PANID);
SetIEEEAddr(addr);
SetShortAddr(0x2222);
}
rf_generate_random_seed();
for (uint8_t i = 0; i < 8; i++) {
regtemp = trx_reg_read(0x24 + i);
}
/* 11_09_rel */
trx_reg_write(RF233_REG_TRX_RPC, 0xFF); /* Enable RPC feature by default */
PRINTF("RF233: Installed addresses. Turning on radio.");
rf233_on();
return 0;
}