HI.
I want to send data from nRF24L01 + to RF communication and receive it from nRF24LU1 +. The nRF24L01 + is connected to the STM32. The settings are as follows.
nRF24L01+ code
#if (DEMO_TX_SINGLE)
// The transmitter sends a 5-byte packets to the address '0xE7 0x1C 0xE3' without Auto-ACK (ShockBurst disabled)
// Disable ShockBurst for all RX pipes
nRF24_DisableAA(0xFF);
// Set RF channel
nRF24_SetRFChannel(2);
// Set data rate
nRF24_SetDataRate(nRF24_DR_1Mbps);
// Set CRC scheme
nRF24_SetCRCScheme(nRF24_CRC_1byte);
// Set address width, its common for all pipes (RX and TX)
nRF24_SetAddrWidth(5);
// Configure TX PIPE
static const uint8_t nRF24_ADDR[] = { 0xE7,0xE7,0xE7,0xE7,0xE7 };
nRF24_SetAddr(nRF24_PIPETX, nRF24_ADDR); // program TX address
// Set TX power (maximum)
nRF24_SetTXPower(nRF24_TXPWR_0dBm);
// Set operational mode (PTX == transmitter)
nRF24_SetOperationalMode(nRF24_MODE_TX);
// Clear any pending IRQ flags
nRF24_ClearIRQFlags();
// Wake the transceiver
nRF24_SetPowerMode(nRF24_PWR_UP);
// The main loop
j = 0;
payload_length = 4;
while (1) {
// Prepare data packet
for (i = 0; i < payload_length; i++) {
nRF24_payload[i] = j++;
if (j > 0x000000FF) j = 0;
}
// Print a payload
UART_SendStr("PAYLOAD:>");
UART_SendBufHex((char *)nRF24_payload, payload_length);
UART_SendStr("< ... TX: ");
// Transmit a packet
tx_res = nRF24_TransmitPacket(nRF24_payload, payload_length);
switch (tx_res) {
case nRF24_TX_SUCCESS:
UART_SendStr("OK");
UART_SendInt(nnum);
nnum++;
break;
case nRF24_TX_TIMEOUT:
UART_SendStr("TIMEOUT");
break;
case nRF24_TX_MAXRT:
UART_SendStr("MAX RETRANSMIT");
break;
default:
UART_SendStr("ERROR");
break;
}
UART_SendStr("\r\n");
// Wait ~0.5s
Delay();
}
The nRF24LU1 + code received the nAN-22 from the Nordic website. www.nordicsemi.com/.../nRF24LU1P
nRF24LU1+ code
void main()
{
// Enable radio SPI
RFCTL = 0x10;
// Enable the radio clock
RFCKEN = 1;
// Enable RF interrupt
RF = 1;
// Enable global interrupt
EA = 1;
// Initialize RF device
rf_init();
//en_aa disable
hal_nrf_open_pipe(HAL_NRF_PIPE1, false);
//ARC 0x00; to diable enhanced shockbuck
//hal_nrf_set_auto_retr(HAL_NRF_PIPE0,0x0000);
// Set RF channel
hal_nrf_set_rf_channel(2);
// Set data rate
hal_nrf_set_datarate(HAL_NRF_1MBPS);
// Set CRC scheme
hal_nrf_set_crc_mode(HAL_NRF_CRC_8BIT);
// Set address width
hal_nrf_set_address_width(HAL_NRF_AW_5BYTES);
// Set pipe address
hal_nrf_set_address(HAL_NRF_PIPE1, default_pipe_address);
// Set TX power for Auto-ACK (maximum, to ensure that transmitter will hear ACK reply)
//hal_nrf_set_output_power(HAL_NRF_0DBM);
// Set payload width to 4 bytes
hal_nrf_set_rx_payload_width(HAL_NRF_PIPE1, 4);
// Set operational mode (PRX == receiver)
hal_nrf_set_operation_mode(HAL_NRF_PRX);
// Power up radio
hal_nrf_set_power_mode(HAL_NRF_PWR_UP);
delay_us(150);
// Enable receiver
CE_HIGH();
delay_us(130);
while(true) { }
}
- To receive data from the nRF24LU1 + via RF communication, should I send data via USB?
I just want to receive the data, so I set it as follows app_state = APP_SEARCHING;
However, nRF24LU1 + does not pass to APP_CONNECTED.
hal_nrf_set_crc_mode
hal_nrf_set_address
hal_nrf_set_address_width
hal_nrf_set_rf_channel
Even though I applied the same function above to the main function, it doesn't work either.
I want to know what went wrong. Thank you.
