void read_RX(unsigned char *RX_Data)
{
unsigned char i, j;
// flush data buffer
for (i = 0; i < RF_PAYLOAD; i++)
RX_Data[i] = 0;
// Read RX payload e coloca no buffer RX_Data
SPI_CSN = 0;
spi_Send_Read(0x61);
for (j = 0; j < RF_PAYLOAD; j++)
{
RX_Data[j] = spi_Send_Read(0);
}
SPI_CSN = 1;
//Flush RX FIFO
SPI_CSN = 0;
spi_Send_Read(0xE2);
SPI_CSN = 1;
SPI_CSN = 0;
//reset int
spi_Send_Read(0x27);
spi_Send_Read(0x40);
SPI_CSN = 1;
}//
unsigned char Test_SPI (void)
{
unsigned char data [] = {RADIO_ADDRESS_1, RADIO_ADDRESS_2, RADIO_ADDRESS_3, RADIO_ADDRESS_4, RADIO_ADDRESS_5};
unsigned char data_read = 0;
unsigned char status, i;
//write TX_ADDRESS register
SPI_CSN = 0; //CSN low
status = spi_Send_Read(0x30);
spi_Send_Read(data[0]);
spi_Send_Read(data[1]);
spi_Send_Read(data[2]);
spi_Send_Read(data[3]);
spi_Send_Read(data[4]);
SPI_CSN = 1; //CSN high
//read TX_ADDRESS register
//Check that values are correct using the MPLAB debugger
SPI_CSN = 0; //CSN low
status = spi_Send_Read(0x10);
for (i = 0; i < 5; i++)
{
data_read = spi_Send_Read(0x00);
nop();
if (data_read != data[i]) // se lido não for igual
return 1; // retorna 0 = erro comunicação SPi PIC/nRF24L01
}
SPI_CSN = 1; // CSN high
// retorna 0 = sucesso comunicação SPi PIC/nRF24L01
return 0;
} //
void reset(void)
{
unsigned char i;
unsigned char buffer[4];
//Read RX payload
CSN = 0;
spi_Send_Read(0x61); //0110 0001, R_RX_PAYLOAD
for (i = 0; i < 4; i++) //check number of buffers/pipes;
{
buffer[i] = spi_Send_Read(0); //read operation always starts at byte 0.
}
CSN = 1;
CSN = 0;
spi_Send_Read(0xE2); //1110 0010 = FLUSH_RX
CSN = 1;
CSN = 0;
spi_Send_Read(0x27); //0010 0111 = W_REGISTER, 07=STATUS
spi_Send_Read(0x40); //0100 0000 = Asserted when new data arrives RX FIFO, clear bit
CSN = 1;
}
void transmit_data( unsigned char *TX_Data )
{
unsigned char i, data, cmd;
SPI_CSN = 0;
//clear previous ints
spi_Send_Read(0x27);
spi_Send_Read(0x7E);
SPI_CSN = 1;
SPI_CSN = 0;
//PWR_UP = 1
spi_Send_Read(0x20);
spi_Send_Read(0x3A);
SPI_CSN = 1;
SPI_CSN = 0;
//clear TX fifo
//the data sheet says that this is supposed to come up 0 after POR, but that doesn't seem to be the case
spi_Send_Read(0xE1);
SPI_CSN = 1;
SPI_CSN = 0;
//fill byte payload
spi_Send_Read(0xA0);
for (i = 0; i< RF_PAYLOAD; i++)
spi_Send_Read( TX_Data[i] );
SPI_CSN = 1;
//Pulse CE to start transmission
SPI_CE = 1;
Delay100TCYx(2);
SPI_CE = 0;
}//
// complete configure nRF24L01 for Rx/Tx
void configure_Radio(void)
{
SPI_CSN = 0;
SPI_CE = 0;
//PRX, CRC enabled
spi_Send_Read(0x20);
spi_Send_Read(0x39);
SPI_CSN = 1;
SPI_CSN = 0;
//disable auto-ack for all channels
spi_Send_Read(0x21);
spi_Send_Read(0x00);
SPI_CSN = 1;
SPI_CSN = 0;
//address width = 5 bytes
spi_Send_Read(0x23);
spi_Send_Read(0x03);
SPI_CSN = 1;
SPI_CSN = 0;
//auto retransmit off
spi_Send_Read(0x24);
spi_Send_Read(0x00);
SPI_CSN = 1;
SPI_CSN = 0;
//set channel
spi_Send_Read(0x25);
spi_Send_Read(RF_CHANNEL);
SPI_CSN = 1;
SPI_CSN = 0;
//data rate =
spi_Send_Read(0x26);
#if defined ( RF_DATA_RATE_250KBPS )
spi_Send_Read(0x27); // 0x07 = 1MBPS - 0x27 = 250Kbps
#elif defined ( RF_DATA_RATE_1MBPS )
spi_Send_Read(0x07);
#else
#error "Definir RF_DATA_RATE"
#endif
SPI_CSN = 1;
SPI_CSN = 0;
//4 byte payload
spi_Send_Read(0x31);
spi_Send_Read(RF_PAYLOAD);
SPI_CSN = 1;
SPI_CSN = 0;
//set TX address
spi_Send_Read(0x30);
spi_Send_Read(RADIO_ADDRESS_1);
spi_Send_Read(RADIO_ADDRESS_2);
spi_Send_Read(RADIO_ADDRESS_3);
spi_Send_Read(RADIO_ADDRESS_4);
spi_Send_Read(RADIO_ADDRESS_5);
SPI_CSN = 1;
SPI_CSN = 0;
//set RX address
spi_Send_Read(0x2A);
spi_Send_Read(RADIO_ADDRESS_1);
spi_Send_Read(RADIO_ADDRESS_2);
spi_Send_Read(RADIO_ADDRESS_3);
spi_Send_Read(RADIO_ADDRESS_4);
spi_Send_Read(RADIO_ADDRESS_5);
SPI_CSN = 1;
SPI_CSN = 0;
//PWR_UP = 1
spi_Send_Read(0x20);
spi_Send_Read(0x3B); // 3B
SPI_CSN = 1;
SPI_CE = 1;
}//
// configure nRF24L01 for transmit only
void configure_transmitter(void)
{
int i, j;
unsigned char data, cmd;
SPI_CE = 0;
SPI_CSN = 0;
// PTX, CRC enabled, mask a couple of ints
spi_Send_Read(0x20);
spi_Send_Read(0x38);
SPI_CSN = 1;
SPI_CSN = 0;
//auto retransmit off
spi_Send_Read(0x24);
spi_Send_Read(0x00);
SPI_CSN = 1;
SPI_CSN = 0;
//address width = 5
spi_Send_Read(0x23);
spi_Send_Read(0x03);
SPI_CSN = 1;
SPI_CSN = 0;
//data rate =
spi_Send_Read(0x26);
#if defined ( RF_DATA_RATE_250KBPS )
spi_Send_Read(0x27); // 0x07 = 1MBPS - 0x27 = 250Kbps
#elif defined ( RF_DATA_RATE_1MBPS )
spi_Send_Read(0x07);
#else
#error "Definir RF_DATA_RATE"
#endif
SPI_CSN = 1;
SPI_CSN = 0;
//set channel
spi_Send_Read(0x25);
spi_Send_Read(RF_CHANNEL);
SPI_CSN = 1;
SPI_CSN = 0;
//set address
spi_Send_Read(0x30);
spi_Send_Read(RADIO_ADDRESS_1);
spi_Send_Read(RADIO_ADDRESS_2);
spi_Send_Read(RADIO_ADDRESS_3);
spi_Send_Read(RADIO_ADDRESS_4);
spi_Send_Read(RADIO_ADDRESS_5);
// for (j = 0; j < 5; j++)
// spi_Send_Read(0xE7);
SPI_CSN = 1;
SPI_CSN = 0;
//disable auto-ack, RX mode
//shouldn't have to do this, but it won't TX if you don't
spi_Send_Read(0x21);
spi_Send_Read(0x00);
SPI_CSN = 1;
}//
// configure nRF24L01 for receive only
void configure_RX(void)
{
unsigned char i, j;
SPI_CSN = 0;
SPI_CE = 0;
//PRX, CRC enabled
spi_Send_Read(0x20);
spi_Send_Read(0x39);
SPI_CSN = 1;
SPI_CSN = 0;
//disable auto-ack for all channels
spi_Send_Read(0x21);
spi_Send_Read(0x00);
SPI_CSN = 1;
SPI_CSN = 0;
//address width = 5 bytes
spi_Send_Read(0x23);
spi_Send_Read(0x03);
SPI_CSN = 1;
SPI_CSN = 0;
//data rate =
spi_Send_Read(0x26);
#if defined ( RF_DATA_RATE_250KBPS )
spi_Send_Read(0x27); // 0x07 = 1MBPS - 0x27 = 250Kbps
#elif defined ( RF_DATA_RATE_1MBPS )
spi_Send_Read(0x07);
#else
#error "Definir RF_DATA_RATE"
#endif
SPI_CSN = 1;
SPI_CSN = 0;
//4 byte payload
spi_Send_Read(0x31);
spi_Send_Read(RF_PAYLOAD);
SPI_CSN = 1;
SPI_CSN = 0;
//set channel
spi_Send_Read(0x25);
spi_Send_Read(RF_CHANNEL);
SPI_CSN = 1;
SPI_CSN = 0;
//set address
spi_Send_Read(0x30);
spi_Send_Read(RADIO_ADDRESS_1);
spi_Send_Read(RADIO_ADDRESS_2);
spi_Send_Read(RADIO_ADDRESS_3);
spi_Send_Read(RADIO_ADDRESS_4);
spi_Send_Read(RADIO_ADDRESS_5);
// for (j = 0; j < 5; j++)
// spi_Send_Read(0xE7);
SPI_CSN = 1;
SPI_CSN = 0;
//PWR_UP = 1
spi_Send_Read(0x20);
spi_Send_Read(0x3B);
SPI_CSN = 1;
SPI_CE = 1;
}//
void initialize_module(void)
{
//Every new command must be started by a
//high to low transition on CSN
//<Command word: MSBit to LSBit (one byte)>
//<Data bytes: LSByte to MSByte, MSBit in each byte first>
//W_REGISTER=001A AAAA (where LSByte is first)
CSN=0;
CE=0;
//Interrupt not reflected on the IRQ pin, Enable CRC, PRX
spi_Send_Read(0x20); //00 = CONFIG
spi_Send_Read(0x39); //0011 1001
//Auto ACK disabled on all data pipes
CSN = 1;
CSN = 0;
spi_Send_Read(0x21);//01 = Enhanced ShockBurst
spi_Send_Read(0x00);//0000 0000 //auto ACK disabled on all data pipes
CSN = 1;
CSN = 0;
spi_Send_Read(0x23); //0010 0011= SETUP_AW
spi_Send_Read(0x03); //0000 0011= RX/TX Address field width of 5 bytes
//Air Data Rate=1Mbps, RF output power in TX mode=0dBm, Setup LNA gain
CSN = 1;
CSN = 0;
spi_Send_Read(0x26); //0010 0101= RF_SETUP
spi_Send_Read(0x07); //0000 0111
CSN = 1;
CSN = 0;
spi_Send_Read(0x31); //0011 0001 = 11, RX_PW_P0
spi_Send_Read(0x04); //0000 0100= 4 bytes in RX payload in data pipe 0
//**for debugging
//Sets the frequency channel nRF24L01 operates on
CSN = 1;
CSN = 0;
spi_Send_Read(0x25);//0010 0101 = 5, RF_CH
spi_Send_Read(0x02);//0000 0010 = channel 2
////**for debugging
CSN = 1;
CSN = 0;
spi_Send_Read(0x30);//0011 0000 = 10, TX_ADDR
spi_Send_Read(0xE7);//reset value = 0xE7E7E7E7E7
spi_Send_Read(0xE7);
spi_Send_Read(0xE7);
spi_Send_Read(0xE7);
spi_Send_Read(0xE7);
CSN = 1;
CSN = 0;
spi_Send_Read(0x20);//0010 0000= 0,CONFIG
spi_Send_Read(0x3B);//0011 1011= POWER UP *look at first part of this function
CSN = 1;
CE = 1;
}
