Hej,
I'm working with the nRF24L01+ and the ATmega328p programmed in c. The goal is to have both TX and RX mode in the same device, mainly work as RX but in certain conditions work as TX. There seems to be a problem in the set registers, because it mostly works once until it switches to the TX mode, and then doesn't switch back properly. I can't find much about the necessary presets in the registers without ESB. I read somewhere in another thread (which i can't find anymore) that the rx addresses have to remain untouched for rx mode. I guess, I need to reset them back to that "untouched" state, but i can't find any information what that would be. I attached the setup function i wrote to switch between RX and TX mode.
Thank you very much in advance! Nito
#define TX_POWERUP nrf24_writeRegister(CONFIG, (1 << EN_CRC)|(0<<CRCO)|(0 << PRIM_RX)|(1 << PWR_UP));
#define RX_POWERUP nrf24_writeRegister(CONFIG, (1 << EN_CRC)|(0<<CRCO)|(1 << PRIM_RX)|(1 << PWR_UP));
uint8_t nrf24_startAs(uint8_t mode){
nrf24_writeRegister(RF_CH, 2);
nrf24_writeRegister(RX_PW_P0, PAYLOAD_LENGTH); //length of payload in 1-32 byte, p60
nrf24_writeRegister(RF_SETUP, RF_SETUP_RF_DR_250 | RF_SETUP_RF_PWR_0);
nrf24_writeRegister(CONFIG, (1 << EN_CRC)|(0<<CRCO)|(0 << PRIM_RX));
if (mode == RX_MODE) {
nrf24_csn_set(0);
spi_transfer(FLUSH_RX);
nrf24_csn_set(1);
nrf24_configRegister(EN_RXADDR,(1<<ERX_P0)|(1<<ERX_P1)|(0<<ERX_P2)|(0<<ERX_P3)|(0<<ERX_P4)|(0<<ERX_P5));
RX_POWERUP;
nrf24_ce_set(1);
UART_Transmit("booted in RX_MODE\n");
return 0;
}
else if (mode == TX_MODE) {
nrf24_csn_set(0);
spi_transfer(FLUSH_TX);
nrf24_csn_set(1);
nrf24_writeRegister(SETUP_RETR,(SETUP_RETR_ARD_750 | SETUP_RETR_ARC_15));
tx_addr[0] = tx_addr[1] = tx_addr[2] = tx_addr[3] = tx_addr[4] = RX_ADDR_P0_B0_DEFAULT_VAL;
nrf24_tx_address(tx_addr);
nrf24_rx_address(tx_addr);
UART_Transmit("booted in TX_MODE\n");
return 0;
}
else {
UART_Transmit("something in startAs went wrong\n");
return -1;
}
}
