void nrf_init(char *address, int address_size) {
P2DIR |= NRF_CE;
P2OUT |= NRF_CE;
//auto ack pipe 0
nrf_write(NRF_EN_AA, EN_AA);
//pipe 0 only
nrf_write(NRF_EN_RXADDR, EN_RXADDR);
//set channel
nrf_set_channel();
//setup RF
nrf_write(NRF_RF_SETUP,RF_SETUP);
set_address(address,address_size);
}
unsigned char NRF24L01_RxPacket(unsigned char *rxbuf)
{
unsigned char sta;
//SPIx_SetSpeed(SPI_SPEED_8); //spi速度为9Mhz（24L01的最大SPI时钟为10Mhz）
sta=nrf_read(STATUS); //读取状态寄存器的值
nrf_write(W_REGISTER+STATUS,sta); //清除TX_DS或MAX_RT中断标志
if(sta&0x40)//接收到数据
{
NRF24L01_Read_Buf(0x61,rxbuf,TX_DATA_WITDH);//读取数据
nrf_write(FLUSH_RX,0xff);//清除RX FIFO寄存器
return 0;
}
return 1;//没收到任何数据
}
unsigned char NRF24L01_TxPacket(unsigned char *txbuf)
{
unsigned char sta;
DrvGPIO_ClrBit(E_GPB, 1);
nrf_writebuf(W_TX_PAYLOAD,txbuf,TX_DATA_WITDH);//写数据到TX BUF 32个字节
DrvGPIO_SetBit(E_GPB,1); // This device is now ready to receive one packet of 16 bytes payload from a TX device
while(DrvGPIO_GetBit(E_GPB, 2)!=0);//等待发送完成
sta=nrf_read(STATUS); //读取状态寄存器的值
nrf_write(W_REGISTER+STATUS,sta); //清除TX_DS或MAX_RT中断标志
if(sta&0x10)//达到最大重发次数
{
nrf_wf(FLUSH_TX);//清除TX FIFO寄存器
nrf_write(W_REGISTER+STATUS,sta); //清除TX_DS或MAX_RT中断标志
sta=nrf_read(STATUS); //读取状态寄存器的值
return 0x10;
}
if(sta&0x20)//发送完成
{
return 0x20;
}
return 0xff;//其他原因发送失败
}
void RX_Mode(void)
{
DrvGPIO_ClrBit(E_GPB, 0x01);
nrf_writebuf(W_REGISTER+TX_ADDR,(uchar*)TxAddr,5);//写TX节点地址
nrf_writebuf(W_REGISTER+RX_ADDR_P0,(uchar*)RxAddr,5); //设置TX节点地址,主要为了使能ACK
nrf_write(W_REGISTER + EN_AA, 0x01); // Enable Auto.Ack:Pipe0
nrf_write(W_REGISTER + EN_RXADDR, 0x01); // Enable Pipe0
nrf_write(W_REGISTER + RF_CH, 40); // Select RF channel 40
nrf_write(W_REGISTER + RX_PW_P0, 4);
nrf_write(W_REGISTER + RF_SETUP, 0x0f);
nrf_write(W_REGISTER + CONFIG, 0x0f); // Set PWR_UP bit, enable CRC(2 bytes)
DrvGPIO_SetBit(E_GPB,1); // This device is now ready to receive one packet of 16 bytes payload from a TX device
// '3443101001', with auto acknowledgment, retransmit count of 10, RF channel 40 and
}
/*****************NRF????????????******************************/
void NRFSetTxMode(uchar *TxDate)
{//????
char ret;
DrvGPIO_ClrBit(E_GPB, 1);
nrf_writebuf(W_REGISTER+TX_ADDR,(uchar*)TxAddr,5);//写TX节点地址
nrf_writebuf(W_REGISTER+RX_ADDR_P0,(uchar*)TxAddr,5); //设置TX节点地址,主要为了使能ACK
ret=nrf_read(STATUS);
delay_s();
nrf_write(W_REGISTER+STATUS,0x10); //使能通道0的自动应答
ret=nrf_read(STATUS);
nrf_write(W_REGISTER+EN_AA,0x01); //使能通道0的自动应答
nrf_write(W_REGISTER+EN_RXADDR,0x01); //使能通道0的接收地址
nrf_write(W_REGISTER+SETUP_RETR,0x1a);//设置自动重发间隔时间:500us + 86us;最大自动重发次数:10次
nrf_write(W_REGISTER+RF_CH,40); //设置RF通道为40
nrf_write(W_REGISTER+RF_SETUP,0x0f); //设置TX发射参数,0db增益,2Mbps,低噪声增益开启
nrf_write(W_REGISTER+CONFIG,0x0e); //配置基本工作模式的参数;PWR_UP,EN_CRC,16BIT_CRC,接收模式,开启所有中断
DrvGPIO_SetBit(E_GPB,1); // This device is now ready to receive one packet of 16 bytes payload from a TX device
}
void radio_off(void) {
char tmp = nrf_read(NRF_CONFIG);
nrf_write(NRF_CONFIG, tmp&(~NRF_CONFIG_RADIO&0xff));
}
void radio_on(void) {
char tmp = nrf_read(NRF_CONFIG);
nrf_write(NRF_CONFIG, tmp|NRF_CONFIG_RADIO);
//wait a little for radio to power up
__delay_cycles(2000);
}
void nrf_init_radio(void) {
nrf_write(NRF_SETUP_RETR, SETUP_RETR); //no auto retransmit
nrf_write(NRF_CONFIG, CONFIG);
radio_off();
}
void nrf_set_channel(void) {
nrf_write(NRF_RF_CH, CHANNEL);
}
void nrf_set_config(char config) {
nrf_write(NRF_CONFIG, config);
}