I have a transmitter that sends 24 bytes of data every 10 ms. Whenever I run the receiver I only get new data once, then nothing. Here's my code
void mirf_config()
{
uint8_t initial_config = 0;
// Set RF channel
mirf_config_register(RF_CH, mirf_CH);
//Set long-range 250k mode
mirf_config_register(RF_SETUP, 0x27);
//Disable auto-ACK
//mirf_config_register(EN_AA, 0);
// Set length of incoming payload: mirf_PAYLOAD = 24
mirf_config_register(RX_PW_P0, mirf_PAYLOAD);
mirf_config_register(RX_PW_P1, mirf_PAYLOAD);
mirf_config_register(EN_RXADDR, 0x0F);
// Start receiver
PTX = 0; // Start in receiving mode
initial_config = mirf_CONFIG | (1<<PWR_UP) | (1<<PRIM_RX) ;
mirf_config_register(CONFIG, initial_config);
RX_POWERUP; // Power up in receiving mode
mirf_CE_hi; // Listening for packets
}
void mirf_init(){
// Initializes pins ans interrupt to communicate with the MiRF module
// Should be called in the early initializing phase at startup.
// Define CSN and CE as Output and set them to default
//DDRB |= ((1<<CSN)|(1<<CE));
mirf_CE_lo;
mirf_CSN_hi;
// Initialize spi module
spi_init();
}
extern uint8_t mirf_data_ready()
// Checks if data is available for reading
{
if (PTX) return 0;
uint8_t status;
uint8_t fifo_status;
// Read MiRF status
mirf_CSN_lo; // Pull down chip select
status = spi_fast_shift(NOP); // Read status register
fifo_status = spi_fast_shift(FIFO_STATUS);
mirf_CSN_hi; // Pull up chip select
return status & (1<<RX_DR);
}
void mirf_read_register(uint8_t reg, uint8_t * value, uint8_t len)
// Reads an array of bytes from the given start position in the MiRF registers.
{
mirf_CSN_lo;
_delay_us(10);
spi_fast_shift(R_REGISTER | (REGISTER_MASK & reg));
_delay_us(10);
spi_transfer_sync(value,value,len);
_delay_us(10);
mirf_CSN_hi;
_delay_us(10);
}
extern void mirf_get_data(uint8_t * data)
// Reads mirf_PAYLOAD bytes into data array
{
mirf_CSN_lo; // Pull down chip select
spi_fast_shift( R_RX_PAYLOAD ); // Send cmd to read rx payload
spi_transfer_sync(data,data,mirf_PAYLOAD); // Read payload
mirf_CSN_hi; // Pull up chip select
mirf_config_register(STATUS,(1<<RX_DR)); // Reset status register
}
int main(void){
mirf_init();
_delay_ms(25);
mirf_config();
while(1){
mirf_read_register(FIFO_STATUS,recvdata,1);
if (t10mSecCtr)
{
recvdata[1] = mirf_data_ready();
mirf_read_register(CONFIG,recvdata+2,1);
//if (mirf_data_ready())
if(!(recvdata[0] & 0x01) || mirf_data_ready())
{
mirf_get_data(recvdata);
}
}
Any suggestions as to why it only receives the data once? At one point I changed the RF_SETUP register to 0x20 and it seemed to work, but it's not working any more. Thanks for your help!
