void NRF_WriteReg(uint8_t RegCommand, uint8_t Value)
{
CSN_H();
delay_ms(3);
CSN_L();
spiX_put(RegCommand);
spiX_wait();
spiX_put(Value);
spiX_wait();
CSN_H();
}
void NRF_WriteRegData(uint8_t RegCommand, uint8_t* pData, uint8_t DataSize)
{
uint8_t ii;
CSN_H();
delay_ms(3);
CSN_L();
spiX_put(RegCommand);
spiX_wait();
for(ii = 0; ii < DataSize; ii++)
{
spiX_put(pData[ii]);
spiX_wait();
}
CSN_H();
}
char spiX_readreg(char RegCommand)
{
char val;
CSN_H();
delay_ms(2);
CSN_L();
spiX_put(RegCommand);
spiX_wait();
spiX_get();
delay_ms(3);
spiX_put(0);
spiX_wait();
val = spiX_get();
CSN_H();
return val;
}
uint8_t spi_xfer(uint8_t b)
{
spiX_put(b);
spiX_wait();
return spiX_get();
}
int main(void)
{
usi_enable();
spiX_initslave(SPIMODE);
sei();
//Initialize slave
slave_init();
//Let settings catch up
_delay_ms(100);
//An initial packet, not sure what it's for, but the other code had it
prepare_packet("", 0);
spiX_put(0);
unsigned char input;
do{
//Wait for SS
while(!slave_selected());
//Wait for pending transfers
spiX_wait();
//Read first character from master
input = spiX_get();
//Is the master telling us to receive?
//If so, interpret the input and prepare a response packet
if(input == RECEIVE_CHAR)
{
//Retrieve the rest of the packet from master
receive_packet();
//Check integrity
if(!check_integrity())
{
prep_err();
continue;
}
//Lowercase are read operations
if(incoming_packet[1] > 96 && incoming_packet[1] < 127)
{
prep_response(incoming_packet[1]);
}
else
{
do_action(incoming_packet[1]);
}
}
//Is the master telling us that it's ready to receive?
else if(input == SEND_CHAR)
{
//Send the prepared packet
send_packet();
}
if(waiting_measure){
slave_run_measure();
waiting_measure = 0;
}
if(waiting_write){
slave_apply();
waiting_write = 0;
}
} while(1); // Loop forever...
}
