void reset_cc1101()
{
uint8_t val=CCxxx0_SRES;
reset_cs();
cs(0);
while(miso());
spi_send_rcv(val);
while(miso());
cs(1);
return;
}
uint8_t read_cc1101(uint8_t addr,uint8_t *buf,uint8_t len,uint8_t type)
{
uint8_t cmd,data=0,i;
cs(0);
while(miso());
if(type==TYPE_BURST)
{
cmd = addr | READ_BURST;
spi_send_rcv(cmd);
for(i=0;i<len;i++)
buf[i]=spi_send_rcv(0);
}
else if(type==TYPE_REG)
{
cmd = addr | READ_BURST;
spi_send_rcv(cmd);
return spi_send_rcv(0);
}
else
{
cmd = addr | READ_SINGLE;
spi_send_rcv(cmd);
return spi_send_rcv(0);
}
cs(1);
return 0;
}
uint8_t spi_send_rcv(uint8_t data)
{
uint8_t i,temp;
temp = 0;
clk(0);
for(i=0; i<8; i++)
{
if(data & 0x80)
{
mosi(1);
}
else mosi(0);
data <<= 1;
clk(1);
_nop_();
_nop_();
temp <<= 1;
if(miso())temp++;
clk(0);
_nop_();
_nop_();
}
return temp;
}
void SPI::begin() {
OutputPin sck(SPI_SCK_PORT, SPI_SCK_PIN);
OutputPin mosi(SPI_MOSI_PORT, SPI_MOSI_PIN);
InputPin miso(SPI_MISO_PORT, SPI_MISO_PIN);
OutputPin ss(SPI_SS_PORT, SPI_SS_PIN);
sck.begin();
mosi.begin();
miso.begin();
ss.begin();
sck.clear();
mosi.clear();
ss.set();
// Warning: if the SS pin ever becomes a LOW INPUT then SPI
// automatically switches to Slave, so the data direction of
// the SS pin MUST be kept as OUTPUT.
SPCR = (1<<MSTR) | (1<<SPE);
}
void write_cc1101(uint8_t addr,uint8_t* buf,uint8_t len,uint8_t type)
{
uint8_t cmd;
int i;
cs(0);
while(miso());
if(type==TYPE_BURST)
{/*write brust */
cmd = addr | WRITE_BURST;
spi_send_rcv(cmd);
for(i=0;i<len;i++)
spi_send_rcv(buf[i]);
}
else if(type==TYPE_REG)
{/*write reg */
spi_send_rcv(addr);
spi_send_rcv(buf[0]);
}
else/* strobe */
spi_send_rcv(addr);
cs(1);
}