int cc1101_read(struct cc1101_dev_s * dev, uint8_t * buf, size_t size)
{
ASSERT(dev);
if (buf==NULL)
{
if (size==0)
{
return 64;
}
/* else received packet size */
return 0;
}
if (cc1101_interrupt == 0)
{
return 0;
}
int status = cc1101_strobe(dev, CC1101_SNOP | CC1101_READ_SINGLE);
if (status & CC1101_STATUS_FIFO_BYTES_AVAILABLE_BM &&
(status & CC1101_STATE_MASK) == CC1101_STATE_IDLE)
{
uint8_t nbytes;
cc1101_access(dev, CC1101_RXFIFO, &nbytes, 1);
nbytes += 2; /* RSSI and LQI */
cc1101_access(dev, CC1101_RXFIFO, buf, (nbytes > size) ? size : nbytes);
/* Flush remaining bytes, if there is no room to receive
* or if there is a BAD CRC
*/
if (nbytes > size || (nbytes <= size && !(buf[nbytes-1]&0x80)))
{
printf("Flushing RX FIFO\n");
cc1101_strobe(dev, CC1101_SFRX);
}
return nbytes;
}
return 0;
}
int cc1101_receive(struct cc1101_dev_s * dev)
{
ASSERT(dev);
/* \todo Wait for IDLE before going into another state? */
cc1101_interrupt = 0;
cc1101_strobe(dev, CC1101_SRX | CC1101_READ_SINGLE);
return 0;
}
int cc1101_send(struct cc1101_dev_s * dev)
{
ASSERT(dev);
if (dev->flags & FLAGS_RXONLY) return -EPERM;
cc1101_interrupt = 0;
cc1101_strobe(dev, CC1101_STX);
/* wait until send, going to IDLE */
while( cc1101_interrupt == 0 );
return 0;
}
int cc1101_idle(struct cc1101_dev_s * dev)
{
ASSERT(dev);
cc1101_strobe(dev, CC1101_SIDLE);
return 0;
}
int cc1101_reset(struct cc1101_dev_s * dev)
{
cc1101_strobe(dev, CC1101_SRES);
return OK;
}
int main(int argc, char * argv[])
{
uint8_t rx[64];
char buff[256];
uint8_t length;
uint8_t address;
uint8_t status;
int i;
rpi_gpio_init();
cc1101_init();
status = cc1101_read_status();
if (status != 0x0F)
{
cc1101_strobe(CC1101_STROBE_SIDLE, CC1101_WRITE_SINGLE);
}
printf("status ok\n\r");
if(argc > 1)
{
printf("argv: %s\n\r", argv[1]);
if(!strcmp(argv[1], "-w"))
{
if(strlen(argv[2]) == 2)
{
strcpy(buff, argv[2]);
} else {
printf("Adress too short\n\r");
return 0;
}
// translate from ascii hex value to raw value
for(i=0;i<2;i++)
{
if(buff[i] > 0x40 && buff[i] < 0x47)
{
address += (buff[i] - 55)<<((1-i)*4);
}
else if (buff[i] > 0x2F && buff[i] < 0x3A)
{
address += (buff[i]-0x30)<<((1-i)*4); //shift
}
else
{
printf("Not a hex number. %.02X\n\r", buff[i]);
return 0;
}
}
printf("Address: 0x%.02X\n\r", address);
strcpy(buff, argv[3]);
length = strlen(buff) + 1;
printf("Length: %d\n\r", length);
cc1101_send_msg(length, address, buff);
cc1101_tx_end_wait();
} else if (!strcmp(argv[1], "-r")) {
cc1101_start_rx();
printf("Rx mode started. Waiting...\n\r");
while(length == 0)
{
do
{
}while(!READ_GD02);
cc1101_rd_burst(CC1101_STROBE_SFTX, &length, 1); //read byte count RX_FIFO
}
cc1101_rd_burst(CC1101_RX_FIFO, rx,length);
rx[length] = '\0';
printf("Received Message:\n\r%s\n\r", rx);
}
} else {
printf("Not enough arguments. Try again.\n\r");
}
}