void NRF905::RX(char *TxRxBuffer)
{
set_rx(); // Set nRF905 in Rx mode
while (check_ready()==0);
delay(1);
RxPacket(TxRxBuffer);
delay(1);
}
/**
* @param none
*/
void nRF905_rxData(void)
{
/* Set nRF905 in Rx mode */
set_rx();
while (check_ready()==0);
nrf_delay_ms(10);
RxPacket();
nrf_delay_ms(10);
}
void NRF905::TX(char *TxRxBuf)
{
set_tx();
delay(1);
// Send data by nRF905
TxPacket(config_info_buf+5, TxRxBuf);
set_rx(); //switch back to receiving mode to set DR low
}
void NRF905::TX(char *TxRxBuf, char *TxAddress)
{
set_tx();
delay(1);
// Send data by nRF905
TxPacket(TxAddress, TxRxBuf);
set_rx();
}
void NRF905::RX(char *TxRxBuf, char *RxAddress) //receive and change own address
{
if(config_info_buf[5] != RxAddress[0] ||\
config_info_buf[6] != RxAddress[1] ||\
config_info_buf[7] != RxAddress[2] ||\
config_info_buf[8] != RxAddress[3]){
config_info_buf[5] = RxAddress[0];
config_info_buf[6] = RxAddress[1];
config_info_buf[7] = RxAddress[2];
config_info_buf[8] = RxAddress[3];
write_config(config_info_buf);
}
set_rx(); // Set nRF905 in Rx mode
while (check_ready()==0);
delay(1);
RxPacket(TxRxBuf);
delay(1);
}
static uint16_t slot_control(void) {
uint8_t len, src;
// test bytes in FIFO
len = cc1101_status_rxbytes();
// check fifo length
if (len==0) {
// empty packet
//~ printf("empty");
return 0;
} else if (len>64) {
// overflow, flush
//~ printf("over");
set_rx();
return 0;
}
// get length, and check
cc1101_fifo_get(&control_msg.hdr.length, 1);
if (control_msg.hdr.length<(CONTROL_LENGTH-1)) {
// length too small, download packet and return
cc1101_fifo_get((uint8_t*)&control_msg+1, control_msg.hdr.length);
cc1101_fifo_get((uint8_t*)&footer, FOOTER_LENGTH);
//~ printf("small");
return 0;
} else if (control_msg.hdr.length>(CONTROL_LENGTH-1)) {
// length too big, can't empty, flush
//~ printf("big");
set_rx();
return 0;
}
// length is good
// get data+status
cc1101_fifo_get((uint8_t*)&control_msg+1, CONTROL_LENGTH-1);
cc1101_fifo_get((uint8_t*)&footer, FOOTER_LENGTH);
// check CRC
if ( (footer.crc&0x80)==0 ) {
// bad crc, exit
//~ printf("crc");
return 0;
}
src = HEADER_GET_ADDR(control_msg.hdr);
// it's valid data for me, check content
if (CONTROL_GET_TYPE(control_msg) == CONTROL_ATTACH_REQ) {
int16_t slot;
slot = tdma_mgt_attach(src);
if (slot>0) {
CONTROL_SET_TYPE(beacon_msg, CONTROL_ATTACH_OK);
CONTROL_SET_ADDR(beacon_msg, src);
beacon_msg.data = (uint8_t)slot;
mac_slots[slot-1].addr = src;
} else {
CONTROL_SET_TYPE(beacon_msg, CONTROL_ATTACH_ERR);
CONTROL_SET_ADDR(beacon_msg, src);
beacon_msg.data = 0xFF;
}
}
return 0;
}
static uint16_t slot_data(void) {
uint8_t len, src;
uint16_t now;
now = timerB_time();
// test CRC and bytes in FIFO
len = cc1101_status_rxbytes();
// check fifo length
if (len==0) {
// empty packet
//~ printf("empty");
return 0;
} else if (len>64) {
// overflow, flush
//~ printf("over");
set_rx();
return 0;
}
// get length, and check
cc1101_fifo_get(&data_msg.hdr.length, 1);
if (data_msg.hdr.length>(DATA_LENGTH-1)) {
// length too big, can't empty, flush
//~ printf("big");
set_rx();
return 0;
}
// length is good
// get data
cc1101_fifo_get((uint8_t*)&data_msg+1, data_msg.hdr.length);
// get status
cc1101_fifo_get((uint8_t*)&footer, FOOTER_LENGTH);
// check CRC
if ( (footer.crc&0x80)==0 ) {
// bad crc, exit
//~ printf("crc");
return 0;
}
// check type, destination
if (HEADER_GET_TYPE(data_msg.hdr) != DATA_TYPE) {
//~ printf("not_data");
return 0;
}
// check source corresponds to timeslot
src = HEADER_GET_ADDR(data_msg.hdr);
if (tdma_mgt_getaddr(slot_count)!=src) {
// src doesn't match slot
return 0;
}
// check data has been read
if (mac_slots[slot_count-1].ready==0) {
memcpy(mac_slots[slot_count-1].data, data_msg.payload, MAC_PAYLOAD_SIZE);
mac_slots[slot_count-1].ready = 1;
// wake the CPU up by returning 1
return 1;
}
return 0;
}
