void init(void)
{
/* Start 16 MHz crystal oscillator */
NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
NRF_CLOCK->TASKS_HFCLKSTART = 1;
/* Wait for the external oscillator to start up */
while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0)
{
}
// Set radio configuration parameters
radio_configure();
simple_uart_config(RTS_PIN_NUMBER, TX_PIN_NUMBER, CTS_PIN_NUMBER, RX_PIN_NUMBER, HWFC);
// Set payload pointer
//NRF_RADIO->PACKETPTR = (uint32_t)scan_rsp; //packet;
// We will only announce on channel 37 for now
int channel = 37;
NRF_RADIO->DATAWHITEIV = channel & 0x3F;
NRF_RADIO->FREQUENCY = ch2freq(channel);
}
int16_t radio_recv(uint8_t channel, uint32_t aa, uint32_t crc,
radio_recv_cb func, void *user_data)
{
uint16_t frequency;
/* Configure callback */
recv_cb = func;
cb_data = user_data;
status = RADIO_RX;
/* Set receive address */
NRF_RADIO->PREFIX0 = aa >> 24;
NRF_RADIO->BASE0 = (aa & 0xFFFFFF) << 8;
NRF_RADIO->RXADDRESSES = 0x00000001;
/* Set frequency */
frequency = ch2freq(channel);
if (frequency < 0)
return -1;
NRF_RADIO->FREQUENCY = (uint32_t) frequency;
/* Set CRC and data whitening init values */
NRF_RADIO->CRCINIT = crc;
NRF_RADIO->DATAWHITEIV = channel & 0x3F;
/* Start RX ramp-up */
NRF_RADIO->TASKS_RXEN = 1UL;
return 0;
}
int16_t radio_prepare(uint8_t ch, uint32_t aa, uint32_t crcinit)
{
int8_t freq;
if (!(status & STATUS_INITIALIZED))
return -ENOREADY;
if (status & STATUS_BUSY)
return -EBUSY;
freq = ch2freq(ch);
if (freq < 0)
return -EINVAL;
NRF_RADIO->DATAWHITEIV = ch & 0x3F;
NRF_RADIO->FREQUENCY = freq;
NRF_RADIO->BASE0 = (aa << 8) & 0xFFFFFF00;
NRF_RADIO->PREFIX0 = (aa >> 24) & RADIO_PREFIX0_AP0_Msk;
NRF_RADIO->CRCINIT = crcinit;
return 0;
}
