uint8_t TM_NRF24L01_Init(uint8_t channel, uint8_t payload_size) {
//Initialize CE and CSN pins
TM_NRF24L01_InitPins();
//Initialize SPI
TM_SPI_Init(NRF24L01_SPI, NRF24L01_SPI_PINS);
//Max payload is 32bytes
if (payload_size > 32) {
payload_size = 32;
}
TM_NRF24L01_Struct.Channel = channel;
TM_NRF24L01_Struct.PayloadSize = payload_size;
TM_NRF24L01_Struct.OutPwr = TM_NRF24L01_OutputPower_0dBm;
TM_NRF24L01_Struct.DataRate = TM_NRF24L01_DataRate_2M;
//Reset nRF24L01+ to power on registers values
TM_NRF24L01_SoftwareReset();
//Channel select
TM_NRF24L01_SetChannel(TM_NRF24L01_Struct.Channel);
//Set pipeline to max possible 32 bytes
TM_NRF24L01_WriteRegister(NRF24L01_REG_RX_PW_P0, TM_NRF24L01_Struct.PayloadSize); // Auto-ACK pipe
TM_NRF24L01_WriteRegister(NRF24L01_REG_RX_PW_P1, TM_NRF24L01_Struct.PayloadSize); // Data payload pipe
TM_NRF24L01_WriteRegister(NRF24L01_REG_RX_PW_P2, 0x00);
TM_NRF24L01_WriteRegister(NRF24L01_REG_RX_PW_P3, 0x00);
TM_NRF24L01_WriteRegister(NRF24L01_REG_RX_PW_P4, 0x00);
TM_NRF24L01_WriteRegister(NRF24L01_REG_RX_PW_P5, 0x00);
//Set RF settings (2mbps, output power)
TM_NRF24L01_SetRF(TM_NRF24L01_Struct.DataRate, TM_NRF24L01_Struct.OutPwr);
//Config register
TM_NRF24L01_WriteRegister(NRF24L01_REG_CONFIG, NRF24L01_CONFIG);
//Enable auto-acknowledgment for all pipes
TM_NRF24L01_WriteRegister(NRF24L01_REG_EN_AA, 0xFF);
// Enable RX addresses
TM_NRF24L01_WriteRegister(NRF24L01_REG_EN_RXADDR, 0xFF);
//Auto retransmit delay: 1000 (4x250) us and Up to 15 retransmit trials
TM_NRF24L01_WriteRegister(NRF24L01_REG_SETUP_RETR, 0x4F);
// Dynamic length configurations: No dynamic length
TM_NRF24L01_WriteRegister(NRF24L01_REG_DYNPD, (0 << NRF24L01_DPL_P0) | (0 << NRF24L01_DPL_P1) | (0 << NRF24L01_DPL_P2) | (0 << NRF24L01_DPL_P3) | (0 << NRF24L01_DPL_P4) | (0 << NRF24L01_DPL_P5));
//Clear FIFOs
NRF24L01_FLUSH_TX;
NRF24L01_FLUSH_RX;
//Go to RX mode
TM_NRF24L01_PowerUpRx();
return 1;
}
uint8_t TM_NRF24L01_Init(uint8_t channel, uint8_t payload_size) {
/* Initialize CE and CSN pins */
TM_NRF24L01_InitPins();
/* Initialize SPI */
TM_SPI_Init(NRF24L01_SPI, NRF24L01_SPI_PINS);
/* Max payload is 32bytes */
if (payload_size > 32) {
payload_size = 32;
}
/* Fill structure */
TM_NRF24L01_Struct.Channel = !channel; /* Set channel to some different value for TM_NRF24L01_SetChannel() function */
TM_NRF24L01_Struct.PayloadSize = payload_size;
TM_NRF24L01_Struct.OutPwr = TM_NRF24L01_OutputPower_0dBm;
TM_NRF24L01_Struct.DataRate = TM_NRF24L01_DataRate_2M;
/* Reset nRF24L01+ to power on registers values */
TM_NRF24L01_SoftwareReset();
/* Channel select */
TM_NRF24L01_SetChannel(channel);
/* Set pipeline to max possible 32 bytes */
TM_NRF24L01_WriteRegister(NRF24L01_REG_RX_PW_P0, TM_NRF24L01_Struct.PayloadSize); // Auto-ACK pipe
TM_NRF24L01_WriteRegister(NRF24L01_REG_RX_PW_P1, TM_NRF24L01_Struct.PayloadSize); // Data payload pipe
TM_NRF24L01_WriteRegister(NRF24L01_REG_RX_PW_P2, TM_NRF24L01_Struct.PayloadSize);
TM_NRF24L01_WriteRegister(NRF24L01_REG_RX_PW_P3, TM_NRF24L01_Struct.PayloadSize);
TM_NRF24L01_WriteRegister(NRF24L01_REG_RX_PW_P4, TM_NRF24L01_Struct.PayloadSize);
TM_NRF24L01_WriteRegister(NRF24L01_REG_RX_PW_P5, TM_NRF24L01_Struct.PayloadSize);
/* Set RF settings (2mbps, output power) */
TM_NRF24L01_SetRF(TM_NRF24L01_Struct.DataRate, TM_NRF24L01_Struct.OutPwr);
/* Config register */
TM_NRF24L01_WriteRegister(NRF24L01_REG_CONFIG, NRF24L01_CONFIG);
/* Enable auto-acknowledgment for all pipes */
TM_NRF24L01_WriteRegister(NRF24L01_REG_EN_AA, 0x3F);
/* Enable RX addresses */
TM_NRF24L01_WriteRegister(NRF24L01_REG_EN_RXADDR, 0x3F);
/* Auto retransmit delay: 1000 (4x250) us and Up to 15 retransmit trials */
TM_NRF24L01_WriteRegister(NRF24L01_REG_SETUP_RETR, 0x4F);
/* Dynamic length configurations: No dynamic length */
TM_NRF24L01_WriteRegister(NRF24L01_REG_DYNPD, (0 << NRF24L01_DPL_P0) | (0 << NRF24L01_DPL_P1) | (0 << NRF24L01_DPL_P2) | (0 << NRF24L01_DPL_P3) | (0 << NRF24L01_DPL_P4) | (0 << NRF24L01_DPL_P5));
/* Clear FIFOs */
NRF24L01_FLUSH_TX;
NRF24L01_FLUSH_RX;
/* Clear interrupts */
NRF24L01_CLEAR_INTERRUPTS;
/* Go to RX mode */
TM_NRF24L01_PowerUpRx();
/* Return OK */
return 1;
}