void InitializeNRF24L01()
{
// NRF24L01 goes to RX mode by default;
NRF24L01_Init(DEFAULT_CHANNEL, DEFAULT_PAYLOAD_SIZE);
NRF24L01_SetRF(NRF24L01_DataRate_2M, NRF24L01_OutputPower_M18dBm);
NRF24L01_SetMyAddress(MyAddress);
NRF24L01_SetTxAddress(TxAddress);
}
/**
* @brief Initializes the nRF24L01
* @param Device: The device to use
* @retval ERROR: If something went wrong
* @retval SUCCESS: If everything went OK
*/
ErrorStatus NRF24L01_Init(NRF24L01_Device* Device)
{
/*
* Create the binary semaphores:
* The semaphore is created in the 'empty' state, meaning
* the semaphore must first be given before it can be taken (obtained)
* using the xSemaphoreTake() function.
*/
Device->xTxSemaphore = xSemaphoreCreateBinary();
Device->xDataAvailableSemaphore = xSemaphoreCreateBinary();
xSemaphoreGive(Device->xTxSemaphore);
xSemaphoreGive(Device->xDataAvailableSemaphore);
/* Take the semaphore because no data is available yet */
xSemaphoreTake(Device->xDataAvailableSemaphore, portMAX_DELAY);
/* Initialize RX Buffers */
for (uint32_t i = 0; i < 6; i++)
{
CIRC_BUFFER_Init(&Device->RxPipeBuffer[i]);
}
/* Initialize GPIOs */
GPIO_InitTypeDef GPIO_InitStructure;
/* Initialize CE (Chip Enable) pin */
if (Device->CE_GPIO == GPIOA)
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
else if (Device->CE_GPIO == GPIOB)
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin = Device->CE_Pin;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(Device->CE_GPIO, &GPIO_InitStructure);
DISABLE_DEVICE(Device);
/* Initialize CSN (Chip select) pin */
if (Device->CSN_GPIO == GPIOA)
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
else if (Device->CSN_GPIO == GPIOB)
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin = Device->CSN_Pin;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(Device->CSN_GPIO, &GPIO_InitStructure);
DESELECT_DEVICE(Device);
/* Initialize IRQ (Interrupt) pin */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
if (Device->IRQ_GPIO == GPIOA)
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
else if (Device->IRQ_GPIO == GPIOB)
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin = Device->IRQ_Pin;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(Device->IRQ_GPIO, &GPIO_InitStructure);
/* Initialize interrupt */
/* Connect EXTIx Line to IRQ pin */
GPIO_EXTILineConfig(Device->IRQ_GPIO_PortSource, Device->IRQ_GPIO_PinSource);
EXTI_InitTypeDef EXTI_InitStructure;
EXTI_InitStructure.EXTI_Line = Device->IRQ_EXTI_Line;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_Init(&EXTI_InitStructure);
/* Enable EXTIx Interrupt. The SPIx interrupt has to be higher than this so set EXTIx to the lowest priority*/
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = Device->IRQ_NVIC_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = configLIBRARY_LOWEST_INTERRUPT_PRIORITY;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Initialize spi peripheral */
SPI_InitTypeDef SPI_InitStructure;
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8; /* 72 MHz/8 = 9 MHz, Datasheet page 53 says max 10 MHz (with Cload = 5 pF) */
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; /* See datasheet page 50 */
SPI_InitWithStructure(Device->SPIDevice, &SPI_InitStructure);
/* Wait 100ms for Power-On reset, see page 20 in datasheet */
vTaskDelay(100 / portTICK_PERIOD_MS);
/* Set RF Channel */
NRF24L01_SetRFChannel(Device, Device->RfChannel);
/* Check that the RF channel was set */
if (NRF24L01_GetRFChannel(Device) != Device->RfChannel)
goto error;
/* Set payload size for the pipes, use same for all, and enable the pipes */
for (uint32_t pipe = 0; pipe < 6; pipe++)
{
NRF24L01_SetPayloadSizeForPipe(Device, 32, pipe);
NRF24L01_EnablePipe(Device, pipe);
}
/* Set the TX address */
NRF24L01_SetTxAddress(Device, Device->TxAddress);
/* Set RX address for all pipes */
NRF24L01_SetRxAddressForPipe(Device, Device->RxAddress0, 0);
NRF24L01_SetRxAddressForPipe(Device, Device->RxAddress1, 1);
NRF24L01_SetRxAddressForPipe(Device, Device->RxAddress2, 2);
NRF24L01_SetRxAddressForPipe(Device, Device->RxAddress3, 3);
NRF24L01_SetRxAddressForPipe(Device, Device->RxAddress4, 4);
NRF24L01_SetRxAddressForPipe(Device, Device->RxAddress5, 5);
/* Flush the buffers to get rid of old data and reset the flags in the STATUS register */
NRF24L01_FlushTxBuffer(Device);
NRF24L01_FlushRxBuffer(Device);
NRF24L01_ResetAllFlags(Device);
/* Set the address width */
NRF24L01_SetAddressWidth(Device);
/* Power up the device i RX mode to start listening for packets */
NRF24L01_PowerUpInRxMode(Device);
return SUCCESS;
error:
return ERROR;
}
void retranslate(void)
{
/* Receiver address */
uint8_t TxAddress[] = {
0xE7,
0xE7,
0xE7,
0xE7,
0xE7
};
/* My address */
uint8_t MyAddress[] = {
0x7E,
0x7E,
0x7E,
0x7E,
0x7E
};
uint8_t dataIn[32];
NRF24L01_Transmit_Status_t transmissionStatus;
/* Initialize NRF24L01+ on channel 15 and 32bytes of payload */
/* By default 2Mbps data rate and 0dBm output power */
/* NRF24L01 goes to RX mode by default */
NRF24L01_Init(15, 32);
/* Set RF settings, Data rate to 2Mbps, Output power to -18dBm */
NRF24L01_SetRF(NRF24L01_DataRate_2M, NRF24L01_OutputPower_M18dBm);
/* Set my address, 5 bytes */
NRF24L01_SetMyAddress(MyAddress);
/* Set TX address, 5 bytes */
NRF24L01_SetTxAddress(TxAddress);
LED1_ON;
delay_(3600000);
LED1_OFF;
while (1)
{
/* If data is ready on NRF24L01+ */
if (NRF24L01_DataReady())
{
/* Get data from NRF24L01+ */
NRF24L01_GetData(dataIn);
delay_(36000);
/* Send it back, automatically goes to TX mode */
NRF24L01_Transmit(dataIn);
/* Start send */
LED1_ON;;
delay_(360000);
/* Wait for data to be sent */
do {
transmissionStatus = NRF24L01_GetTransmissionStatus();
} while (transmissionStatus == NRF24L01_Transmit_Status_Sending);
/* Send done */
LED1_OFF;
/* Go back to RX Mode */
NRF24L01_PowerUpRx();
}
}
}