Commit a8e816fb authored by Sam Calisch's avatar Sam Calisch

added hello world radio

parent ffd1f29d
Pipeline #861 passed with stage
in 1 second
//sec,2017
#define PACKET_BASE_ADDRESS_LENGTH (2UL) //Packet base address length field size in bytes
#define PACKET_LENGTH 4
#define REDUNDANCY_COUNT 10 //number of transmissions to ensure delivery... hack.
static int16_t radio_buffer[PACKET_LENGTH] = {0};
void radio_setup(){
NRF_RADIO->POWER = RADIO_POWER_POWER_Disabled; //turn off radio to reset registers
delay(10);
NRF_RADIO->POWER = RADIO_POWER_POWER_Enabled; //turn on radio
delay(10);
NRF_RADIO->TXPOWER = (RADIO_TXPOWER_TXPOWER_Pos3dBm << RADIO_TXPOWER_TXPOWER_Pos);
NRF_RADIO->FREQUENCY = 11UL; // 2400 + X MHz
NRF_RADIO->MODE = (RADIO_MODE_MODE_Nrf_2Mbit << RADIO_MODE_MODE_Pos);
NRF_RADIO->PREFIX0 = ((uint32_t)0xC0 << 0); // Prefix byte of address 0
NRF_RADIO->BASE0 = 0x01234567UL; // Base address for prefix 0
NRF_RADIO->BASE1 = 0x02345678UL; // Base address for prefix 0
NRF_RADIO->TXADDRESS = 0x00UL; // Set device address 0 to use when transmitting
NRF_RADIO->RXADDRESSES = 0x03UL; // Enable device addresses 0 and 1 to receive on
// Packet configuration
NRF_RADIO->PCNF0 = (0 << RADIO_PCNF0_S1LEN_Pos) | (0 << RADIO_PCNF0_S0LEN_Pos) | (0 << RADIO_PCNF0_LFLEN_Pos);
NRF_RADIO->PCNF1 = (RADIO_PCNF1_WHITEEN_Enabled << RADIO_PCNF1_WHITEEN_Pos) |
((PACKET_LENGTH) << RADIO_PCNF1_STATLEN_Pos) |
(RADIO_PCNF1_ENDIAN_Big << RADIO_PCNF1_ENDIAN_Pos) |
(2 << RADIO_PCNF1_BALEN_Pos);
NRF_RADIO->CRCCNF = (RADIO_CRCCNF_LEN_Three << RADIO_CRCCNF_LEN_Pos); // Number of checksum bits
NRF_RADIO->CRCINIT = 0xFFFFUL; // Initial value
NRF_RADIO->CRCPOLY = 0x18D; //x8 + x7 + x3 + x2 + 1 = 110001101
NRF_RADIO->MODECNF0 |= RADIO_MODECNF0_RU_Fast << RADIO_MODECNF0_RU_Pos; //turn on fast ramp up
NRF_RADIO->SHORTS = 0; //turn off all shortcuts, for debug
NRF_RADIO->PACKETPTR = (uint32_t)&radio_buffer; //set pointer to packet buffer
//start HFCLK
NRF_CLOCK->TASKS_HFCLKSTART = 1;
while(!(NRF_CLOCK->HFCLKSTAT & CLOCK_HFCLKSTAT_STATE_Msk)); //wait for hfclk to start
delay(10);
}
void radio_wait_for_end(){ while(!(NRF_RADIO->EVENTS_END)); NRF_RADIO->EVENTS_END = 0;} //clear end event
void radio_wait_for_ready(){ while(!(NRF_RADIO->EVENTS_READY)); NRF_RADIO->EVENTS_READY = 0;} //clear ready event
void radio_disable(){
NRF_RADIO->EVENTS_DISABLED = 0; //clear disabled event
NRF_RADIO->TASKS_DISABLE = 1;
while(!(NRF_RADIO->EVENTS_DISABLED));
}
void radio_send(){
NRF_RADIO->EVENTS_READY = 0; //clear ready event
NRF_RADIO->TASKS_TXEN=1; //trigger tx enable task
delayMicroseconds(20);
//radio_wait_for_ready(); //only generated when actually switching to tx mode
NRF_RADIO->TASKS_START=1; //start
radio_wait_for_end();
}
void radio_send_redundant(){
for(int i=0; i<REDUNDANCY_COUNT; i++){
radio_send();
}
}
int radio_recv(){
//return number of packets before CRC match
NRF_RADIO->EVENTS_CRCOK = 0;
//NRF_RADIO->EVENTS_CRCERROR = 0;
int i=1;
while(true){
NRF_RADIO->EVENTS_READY = 0; //clear ready event
NRF_RADIO->TASKS_RXEN=1; //trigger rx enable task
delayMicroseconds(20);
//radio_wait_for_ready(); //only generated when actually switching to rx mode
NRF_RADIO->TASKS_START=1;
radio_wait_for_end();
if (NRF_RADIO->EVENTS_CRCOK == 1){ break;}
i++;
}
return i;
}
void setup() {
radio_setup();
NRF_RADIO->TXADDRESS = 0x00UL; // Set address to send to device 0
radio_buffer[0] = 1;
radio_buffer[1] = 2;
radio_buffer[2] = 3;
radio_buffer[3] = 4; //set up packet 1,2,3,4
radio_send_redundant(); //send with redundant tx to device 0
NRF_RADIO->TXADDRESS = 0x01UL; // Set address to send to device 1
radio_buffer[0] = 5;
radio_buffer[1] = 6;
radio_buffer[2] = 7;
radio_buffer[3] = 8; //set up packet 5,6,7,8
radio_send_redundant(); //send with redundant tx to device 1
int result = radio_recv(); //wait until recieve
//which pipe a packet arrive on is available in the RXMATCH register
}
void loop() {}
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