void set_address(char *address, int address_size) {
spi_csl();
spi_send(NRF_WRITE | NRF_TX_ADDR);
spi_send_buffer(address, address_size);
spi_csh();
spi_csl();
spi_send(NRF_WRITE | NRF_RX_ADDR_P0);
spi_send_buffer(address, address_size);
spi_csh();
}
char nrf_rx() {
char tmp;
spi_csl();
spi_send(NRF_R_PAYLOAD);
tmp = spi_send(NRF_NOOP);
spi_csh();
return tmp;
}
char nrf_read( char address ) {
char tmp;
spi_csl();
spi_send(NRF_READ | address);
tmp = spi_send(NRF_NOOP);
spi_csh();
return tmp;
}
void nrf_tx(char data) {
char tmp = nrf_read(NRF_FIFO_STATUS);
if(tmp & NRF_STAT_TX_FULL) {
return;
}
radio_on();
spi_csl();
spi_send(NRF_TX);
spi_send(data);
spi_csh();
nrf_ceh();
//start transmission (pulse CE > 10us)
__delay_cycles(20);
nrf_cel();
__delay_cycles(1000);
radio_off();
}
void draw_square()
{
int count = 0;
if(change_duty) {
square_wave_init();
change_duty = 0;
}
while(count < NUM_DIVISIONS) {
if (timeCount > oldTimeCount) {
oldTimeCount = timeCount;
spi_csl();
spi_xfer_byte((squareVals[count] | 0x1000) >> 8);
spi_xfer_byte(squareVals[count++] & 0xFF);
spi_csh();
}
}
void send_command(char command) {
spi_csl();
spi_send(command);
spi_csh();
}
void nrf_write(char address, char data) {
spi_csl();
spi_send(NRF_WRITE | address);
spi_send(data);
spi_csh();
}