HI,i have some problems about RSSI (51882) BELOW IS MY CODE. who can tell me why I can not get RSSI from variable t
int main(void)
{
uint8_t *p;
uint8_t t = 0;
// 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)
{
// Do nothing.
}
// Set Port 1 as output.
nrf_gpio_range_cfg_output(LED_START, LED_STOP);
// Set radio configuration parameters.
radio_configure();
nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT1, 0x55);
while(true)
{
// Set payload pointer.
NRF_RADIO->PACKETPTR = (uint32_t)packet;
// p = (uint8_t *);
NRF_RADIO->EVENTS_READY = 0U;
NRF_RADIO->TASKS_RXEN = 1U; // Enable radio.
while(NRF_RADIO->EVENTS_READY == 0U) // Wait for an event to be ready.
{
// Do nothing.
}
NRF_RADIO->EVENTS_END = 0U;
NRF_RADIO->TASKS_START = 1U; // Start listening and wait for address received event.
// NRF_RADIO->TASKS_RSSISTART = 1U;
// Wait for the end of the packet.
while(NRF_RADIO->EVENTS_END == 0U)
{
// Do nothing.
}
//NRF_RADIO->EVENTS_RSSIEND = 0U;
// NRF_RADIO->TASKS_RSSISTART = 1U;
while(NRF_RADIO->EVENTS_RSSIEND == 0U)
{
}
t = NRF_RADIO->RSSISAMPLE;
//nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT1, NRF_RADIO->RSSISAMPLE);
// Write received data to port 1 on CRC match.
if (NRF_RADIO->CRCSTATUS == 1U)
{
nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT1, packet[0]);
nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT1, packet[1]);
nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT1, packet[2]);
nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT1, packet[3]);
nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT1, packet[4]);
nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT1, packet[5]);
// nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT1, packet[6]);
// nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT1, packet[7]);
// nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT1, packet[8]);
// t = NRF_RADIO->RSSISAMPLE;
//p = &packet;
}
// while(NRF_RADIO->EVENTS_RSSIEND == 0U)
// {
//
// }
NRF_RADIO->EVENTS_DISABLED = 0U;
NRF_RADIO->TASKS_RSSISTOP = 1U;
NRF_RADIO->TASKS_DISABLE = 1U; // Disable the radio.
while(NRF_RADIO->EVENTS_DISABLED == 0U)
{
// Do nothing.
}
}
}
void radio_configure()
{
// Radio config
NRF_RADIO->SHORTS = RADIO_SHORTS_ADDRESS_RSSISTART_Msk ; //( RADIO_SHORTS_DISABLED_RSSISTOP_Enabled << RADIO_SHORTS_DISABLED_RSSISTOP_Pos ) ;
NRF_RADIO->TXPOWER = (RADIO_TXPOWER_TXPOWER_Neg30dBm << RADIO_TXPOWER_TXPOWER_Pos);
NRF_RADIO->FREQUENCY = 2UL; // Frequency bin 7, 2407MHz
NRF_RADIO->MODE = (RADIO_MODE_MODE_Nrf_1Mbit << RADIO_MODE_MODE_Pos);
// NRF_RADIO->PACKETPTR =
// Radio address config
NRF_RADIO->PREFIX0 =
((uint32_t)swap_bits(0xC3) << 24) // Prefix byte of address 3 converted to nRF24L series format
| ((uint32_t)swap_bits(0xC2) << 16) // Prefix byte of address 2 converted to nRF24L series format
| ((uint32_t)swap_bits(0xC1) << 8) // Prefix byte of address 1 converted to nRF24L series format
| ((uint32_t)swap_bits(0x57) << 0); // Prefix byte of address 0 converted to nRF24L series format
NRF_RADIO->PREFIX1 =
((uint32_t)swap_bits(0xC7) << 24) // Prefix byte of address 7 converted to nRF24L series format
| ((uint32_t)swap_bits(0xC6) << 16) // Prefix byte of address 6 converted to nRF24L series format
| ((uint32_t)swap_bits(0xC4) << 0); // Prefix byte of address 4 converted to nRF24L series format
NRF_RADIO->BASE0 = bytewise_bitswap(0x42594c4BUL); // Base address for prefix 0 converted to nRF24L series format
NRF_RADIO->BASE1 = bytewise_bitswap(0x89ABCDEFUL); // Base address for prefix 1-7 converted to nRF24L series format
//NRF_RADIO->TXADDRESS = 0x00UL; // Set device address 0 to use when transmitting
NRF_RADIO->RXADDRESSES = 0x01UL; // Enable device address 0 to use to select which addresses to receive
// Packet configuration
NRF_RADIO->PCNF0 = (PACKET_S1_FIELD_SIZE << RADIO_PCNF0_S1LEN_Pos) |
(PACKET_S0_FIELD_SIZE << RADIO_PCNF0_S0LEN_Pos) |
(PACKET_LENGTH_FIELD_SIZE << RADIO_PCNF0_LFLEN_Pos); //lint !e845 "The right argument to operator '|' is certain to be 0"
// Packet configuration
NRF_RADIO->PCNF1 = (RADIO_PCNF1_WHITEEN_Disabled << RADIO_PCNF1_WHITEEN_Pos) |
(RADIO_PCNF1_ENDIAN_Big << RADIO_PCNF1_ENDIAN_Pos) |
(PACKET_BASE_ADDRESS_LENGTH << RADIO_PCNF1_BALEN_Pos) |
(PACKET_STATIC_LENGTH << RADIO_PCNF1_STATLEN_Pos) |
(PACKET_PAYLOAD_MAXSIZE << RADIO_PCNF1_MAXLEN_Pos); //lint !e845 "The right argument to operator '|' is certain to be 0"
// CRC Config
NRF_RADIO->CRCCNF = (RADIO_CRCCNF_LEN_Two << RADIO_CRCCNF_LEN_Pos); // Number of checksum bits
if ((NRF_RADIO->CRCCNF & RADIO_CRCCNF_LEN_Msk) == (RADIO_CRCCNF_LEN_Two << RADIO_CRCCNF_LEN_Pos))
{
NRF_RADIO->CRCINIT = 0xFFFFUL; // Initial value
NRF_RADIO->CRCPOLY = 0x11021UL; // CRC poly: x^16+x^12^x^5+1
}
else if ((NRF_RADIO->CRCCNF & RADIO_CRCCNF_LEN_Msk) == (RADIO_CRCCNF_LEN_One << RADIO_CRCCNF_LEN_Pos))
{
NRF_RADIO->CRCINIT = 0xFFUL; // Initial value
NRF_RADIO->CRCPOLY = 0x107UL; // CRC poly: x^8+x^2^x^1+1
}
}
hope u can help me ..
