// Send data packet
// input:
// pBuf - buffer with data to send
// return:
// nRF24_MASK_MAX_RT - if transmit failed with maximum auto retransmit count
// nRF24_MAX_TX_DS - if transmit succeed
// contents of STATUS register otherwise
uint8_t nRF24_TXPacket(uint8_t * pBuf, uint8_t TX_PAYLOAD) {
uint8_t status;
CE_L();
nRF24_WriteBuf(nRF24_CMD_WREG | nRF24_REG_TX_ADDR,nRF24_TX_addr,nRF24_TX_ADDR_WIDTH); // Set static TX address
nRF24_WriteBuf(nRF24_CMD_WREG | nRF24_REG_RX_ADDR_P0,nRF24_RX_addr,nRF24_RX_ADDR_WIDTH); // Set static RX address for auto ack
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_EN_AA,0x01); // Enable auto acknowledgement for data pipe 0
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_SETUP_RETR,0x1A); // Automatic retransmission: wait 500us, 10 retries
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_RF_CH,0x6E); // Set frequency channel 110 (2.510MHz)
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_RF_SETUP,0x07); // Setup: 1Mbps, 0dBm, LNA on
nRF24_WriteBuf(nRF24_CMD_W_TX_PAYLOAD,pBuf,TX_PAYLOAD); // Write specified buffer to FIFO
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_CONFIG,0x0E); // Config: CRC on (2 bytes), Power UP, RX/TX ctl = PTX
CE_H(); // CE pin high => Start transmit
// Delay_us(10); // Must hold CE at least 10us
//while(PB_IDR_bit.IDR2 != 0); // Wait for IRQ from nRF24L01
CE_L();
status = nRF24_ReadReg(nRF24_REG_STATUS); // Read status register
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_STATUS,status | 0x70); // Clear RX_DR, TX_DS, MAX_RT flags
if (status & nRF24_MASK_MAX_RT) {
// Auto retransmit counter exceeds the programmed maximum limit. FIFO is not removed.
nRF24_RWReg(nRF24_CMD_FLUSH_TX,0xFF); // Flush TX FIFO buffer
return nRF24_MASK_MAX_RT;
};
if (status & nRF24_MASK_TX_DS) {
// Transmit ok
nRF24_RWReg(nRF24_CMD_FLUSH_TX,0xFF); // Flush TX FIFO buffer
return nRF24_MASK_TX_DS;
}
// Some banana happens
return status;
}
void vNrfSend(uint8_t * addr, uint8_t *data, uint8_t len)
{
uint8_t status;
while (g_uNrfTx) // this should be never executed code!
{
status = uNrfReadReg(STATUS);
if (status & ( (1 << TX_DS) | (1 << MAX_RT) ) )
{
uNrfWriteReg(STATUS, (1 << TX_DS) | (1 << MAX_RT));
g_uNrfTx=0;
break;
}
}
uNrfWriteBuf(TX_ADDR, addr, NRF_ADR_LEN);
uNrfWriteBuf(RX_ADDR_P0, addr, NRF_ADR_LEN);
CE_L();
vNrfPowerUpTx();
vNrfFlushTx();
uNrfWriteBuf(W_TX_PAYLOAD, data, len);
CE_H();
// vTimerDelayUs(20);
// CE_L();
}
u8 ANO_NRF::NRF_Tx_Dat(u8 *txbuf,u8 *AckPacket)
{
u8 state;
/*ce为低，进入待机模式1*/
CE_L();
/*写数据到TX BUF 最大 32个字节*/
Write_Buf(WR_TX_PLOAD,txbuf,TX_PLOAD_WIDTH);
/*CE为高，txbuf非空，发送数据包 */
CE_H();
/*等待发送完成中断 */
while(NRF_Read_IRQ()!=0);
state = Read_Reg(NRFRegSTATUS);/*读取状态寄存器的值 */
Write_Reg(NRF_WRITE_REG+NRFRegSTATUS,state);
if(state&RX_DR)
{
Read_Buf(RD_RX_PLOAD, AckPacket, 32);
}
Write_Reg(FLUSH_TX,NOP);//清除TX FIFO寄存器
return state;
}
void ANO_NRF::TxPacket(uint8_t * tx_buf, uint8_t len)
{
CE_L(); //StandBy I模式
Write_Buf(NRF_WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); // 装载接收端地址
Write_Buf(WR_TX_PLOAD, tx_buf, len); // 装载数据
CE_H(); //置高CE，激发数据发送
}
// Put nRF24 in Power Down mode
void nRF24_PowerDown(void) {
uint8_t conf;
CE_L(); // CE pin to low
conf = nRF24_ReadReg(nRF24_REG_CONFIG);
conf &= ~(1<<1); // Clear PWR_UP bit
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_CONFIG,conf); // Go Power down mode
}
// Put nRF24L01 in TX mode
void nRF24_TXMode(void) {
CE_L();
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_EN_AA,0x01); // Enable ShockBurst for data pipe 0
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_SETUP_RETR,0x1A); // Auto retransmit: wait 500us, 10 retries
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_RF_CH,0x6E); // Set frequency channel 110 (2.510MHz)
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_RF_SETUP,0x06); // Setup: 1Mbps, 0dBm, LNA off
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_CONFIG,0x0E); // Config: CRC on (2 bytes), Power UP, RX/TX ctl = PTX
}
void vNrfPowerUpRx(void)
{
g_uNrfTx = 0;
CE_L();
uNrfWriteReg(CONFIG, NRF_CONFIG | ((1<<PWR_UP) | (1<<PRIM_RX)));
uNrfWriteReg(EN_RXADDR, (0<<ERX_P0) | (1<<ERX_P1));
CE_H();
uNrfWriteReg(STATUS, (1 << TX_DS) | (1 << MAX_RT));
// need delay!!! but inside interrupt!!
}
// Put nRF24L01 in RX mode
void nRF24_RXMode(uint8_t RX_PAYLOAD) {
CE_L();
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_EN_AA,0x01); // Enable ShockBurst for data pipe 0
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_EN_RXADDR,0x01); // Enable data pipe 0
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_RF_CH,0x6E); // Set frequency channel 110 (2.510MHz)
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_RX_PW_P0,RX_PAYLOAD); // Set RX payload length
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_RF_SETUP,0x06); // Setup: 1Mbps, 0dBm, LNA off
nRF24_RWReg(nRF24_CMD_WREG | nRF24_REG_CONFIG,0x0F); // Config: CRC on (2 bytes), Power UP, RX/TX ctl = PRX
nRF24_WriteBuf(nRF24_CMD_WREG | nRF24_REG_RX_ADDR_P0,nRF24_RX_addr,nRF24_RX_ADDR_WIDTH); // Set static RX address
CE_H();
// Delay_us(10); // Hold CE high at least 10us
}
// GPIO and SPI initialization
void nRF24_init() {
// IRQ --> PB2
// CE <-- PB3
// CSN <-- PB4
// SCK <-- PB5
// MOSI <-- PB6
// MISO --> PB7
// SCK,MOSI,CSN,CE pins set as output fiwth push-pull at 10MHz
PB_DDR |= 0x78; // Set PB3..PB6 as output
PB_CR1 |= 0x78; // Configure PB3..PB6 as output with push-pull
PB_CR2 |= 0x78; // Set 10MHz output speed for PB3..PB6 pins
//PB_CR2 &= ~(0x78); // Set 2MHz output speed for PB3..PB6 pins
// MISO pin set as input with pull-up
PB_DDR_bit.DDR7 = 0; // Set PB7 as input
PB_CR1_bit.C17 = 1; // Configure PB7 as input with pull-up
PB_CR2_bit.C27 = 0; // Disable external interrupt for PB7
// IRQ pin set as input with pull-up
PB_DDR_bit.DDR2 = 0; // Set PB2 as input
PB_CR1_bit.C12 = 1; // Configure PB2 as input with pull-up
PB_CR2_bit.C22 = 0; // Disable external interrupt for PB2
// Configure SPI
CLK_PCKENR1_bit.PCKEN14 = 1; // Enable SPI peripherial (PCKEN14)
/*
SPI1_CR1_bit.BR = 0; // Baud = f/2 (1MHz at 2MHz CPU)
SPI1_CR1_bit.CPHA = 0; // CPHA = 1st edge
SPI1_CR1_bit.CPOL = 0; // CPOL = low (SCK low when idle)
SPI1_CR1_bit.LSBFIRST = 0; // first bit is MSB
SPI1_CR1_bit.MSTR = 1; // Master configuration
SPI1_CR1_bit.SPE = 0; // Peripherial enabled
*/
SPI1_CR1 = 0x04; // SPI: MSB first, Baud=f/2, Master, CPOL=low, CPHA=1st edge
//SPI1_CR1 = 0x24; // SPI: MSB first, Baud=f/32, Master, CPOL=low, CPHA=1st edge
/*
SPI1_CR2_bit.BDM = 0; // 2-line unidirectional data mode
SPI1_CR2_bit.BD0E = 0; // don't care when BDM set to 0
SPI1_CR2_bit.RXOnly = 0; // Full duplex
SPI1_CR2_bit.SSI = 1; // Master mode
SPI1_CR2_bit.SSM = 1; // Software slave management enabled
*/
SPI1_CR2 = 0x03; // SPI: 2-line mode, full duplex, SSM on (master mode)
SPI1_CR1_bit.SPE = 1; // SPI peripherial enabled
CSN_H();
CE_L(); // CE pin low -> power down mode at startup
}
void RX_Mode(void)
{
CE_L();
NRF24L01_Write_Buf(WRITE_REG+RX_ADDR_P0,(u8*)RX_ADDRESS,RX_ADR_WIDTH);//写RX节点地址
NRF24L01_Write_Reg(WRITE_REG+EN_AA,0x01); //使能通道0的自动应答
NRF24L01_Write_Reg(WRITE_REG+EN_RXADDR,0x01); //使能通道0的接收地址
NRF24L01_Write_Reg(WRITE_REG+RF_CH,40); //设置RF通信频率
NRF24L01_Write_Reg(WRITE_REG+RX_PW_P0,RX_PLOAD_WIDTH);//选择通道0的有效数据宽度
NRF24L01_Write_Reg(WRITE_REG+RF_SETUP,0x0f); //设置TX发射参数,0db增益,2Mbps,低噪声增益开启 ?
NRF24L01_Write_Reg(WRITE_REG+CONFIG, 0x0f); //配置基本工作模式的参数;PWR_UP,EN_CRC,16BIT_CRC,接收模式
CE_H(); //CE为高,进入接收模式
}
void TX_Mode(void)
{
CE_L();
NRF24L01_Write_Buf(WRITE_REG+TX_ADDR,(u8*)TX_ADDRESS,TX_ADR_WIDTH);//写TX节点地址
NRF24L01_Write_Buf(WRITE_REG+RX_ADDR_P0,(u8*)RX_ADDRESS,RX_ADR_WIDTH); //设置TX节点地址,主要为了使能ACK
NRF24L01_Write_Reg(WRITE_REG+EN_AA,0x01); //使能通道0的自动应答
NRF24L01_Write_Reg(WRITE_REG+EN_RXADDR,0x01); //使能通道0的接收地址
NRF24L01_Write_Reg(WRITE_REG+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
NRF24L01_Write_Reg(WRITE_REG+RF_CH,40); //设置RF通道为40
NRF24L01_Write_Reg(WRITE_REG+RF_SETUP,0x0f); //设置TX发射参数,0db增益,2Mbps,低噪声增益开启 ?
NRF24L01_Write_Reg(WRITE_REG+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
CE_H(); //CE为高,10us后启动发送
}
void ANO_NRF::Init(u8 model, u8 ch)
{
CE_L();
Write_Buf(NRF_WRITE_REG+RX_ADDR_P0,RX_ADDRESS,RX_ADR_WIDTH); //写RX节点地址
Write_Buf(NRF_WRITE_REG+TX_ADDR,TX_ADDRESS,TX_ADR_WIDTH); //写TX节点地址
Write_Reg(NRF_WRITE_REG+EN_AA,0x01); //使能通道0的自动应答
Write_Reg(NRF_WRITE_REG+EN_RXADDR,0x01); //使能通道0的接收地址
Write_Reg(NRF_WRITE_REG+SETUP_RETR,0x1a); //设置自动重发间隔时间:500us;最大自动重发次数:10次 2M波特率下
Write_Reg(NRF_WRITE_REG+RF_CH,ch); //设置RF通道为CHANAL
Write_Reg(NRF_WRITE_REG+RF_SETUP,0x0f); //设置TX发射参数,0db增益,2Mbps,低噪声增益开启
//Write_Reg(NRF_WRITE_REG+RF_SETUP,0x07); //设置TX发射参数,0db增益,1Mbps,低噪声增益开启
/////////////////////////////////////////////////////////
if(model==1) //RX
{
Write_Reg(NRF_WRITE_REG+RX_PW_P0,RX_PLOAD_WIDTH); //选择通道0的有效数据宽度
Write_Reg(NRF_WRITE_REG + CONFIG, 0x0f); // IRQ收发完成中断开启,16位CRC,主接收
}
else if(model==2) //TX
{
Write_Reg(NRF_WRITE_REG+RX_PW_P0,RX_PLOAD_WIDTH); //选择通道0的有效数据宽度
Write_Reg(NRF_WRITE_REG + CONFIG, 0x0e); // IRQ收发完成中断开启,16位CRC,主发送
}
else if(model==3) //RX2
{
Write_Reg(FLUSH_TX,0xff);
Write_Reg(FLUSH_RX,0xff);
Write_Reg(NRF_WRITE_REG + CONFIG, 0x0f); // IRQ收发完成中断开启,16位CRC,主接收
RW(0x50);
RW(0x73);
Write_Reg(NRF_WRITE_REG+0x1c,0x01);
Write_Reg(NRF_WRITE_REG+0x1d,0x06);
}
else //TX2
{
Write_Reg(NRF_WRITE_REG + CONFIG, 0x0e); // IRQ收发完成中断开启,16位CRC,主发送
Write_Reg(FLUSH_TX,0xff);
Write_Reg(FLUSH_RX,0xff);
RW(0x50);
RW(0x73);
Write_Reg(NRF_WRITE_REG+0x1c,0x01);
Write_Reg(NRF_WRITE_REG+0x1d,0x06);
}
CE_H();
delayms(50);
}
void vNrfInit(uint8_t channel, uint8_t * rx_addr)
{
// memcpy(g_RxAddr, rx_addr, NRF_ADR_LEN);
CE_L();
uNrfWriteBuf(RX_ADDR_P1, rx_addr, NRF_ADR_LEN);
CE_H();
uNrfWriteReg(RF_CH, channel); // Select RF channel
uNrfWriteReg(RX_PW_P0, 4);
uNrfWriteReg(RX_PW_P1, 4);
uNrfWriteReg(SETUP_RETR, 0x1F); // 15 retries
// uNrfWriteReg(RF_SETUP, 0xF); // 2 mbps + max gain + LNA
vNrfSetDynamicPayload();
vNrfPowerUpRx();
vNrfFlushRx();
}
void RX_Mode(void)
{
CE_L();
SPI2_writeBuf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH);
SPI2_writeReg(WRITE_REG + EN_AA, 0x01);
// Enable Auto.Ack:Pipe0
SPI2_writeReg(WRITE_REG + EN_RXADDR, 0x01); // Enable Pipe0
SPI2_writeReg(WRITE_REG + RF_CH, 40);
// Select RF channel 40
SPI2_writeReg(WRITE_REG + RX_PW_P0, TX_PLOAD_WIDTH);
SPI2_writeReg(WRITE_REG + RF_SETUP, 0x07);
SPI2_writeReg(WRITE_REG + CONFIG, 0x0f);
// Set PWR_UP bit, enable CRC(2 bytes)
//& Prim:RX. RX_DR enabled..
CE_H(); // Set CE pin high to enable RX device
// This device is now ready to receive one packet of 16 bytes payload from a TX device
//sending to address
// '3443101001', with auto acknowledgment, retransmit count of 10, RF channel 40 and
//datarate = 2Mbps.
}
u8 NRF24L01_TxPacket(u8 *txbuf)
{
u8 sta;
CE_L();
NRF24L01_Write_Buf(WR_TX_PLOAD,txbuf,TX_PLOAD_WIDTH);//写数据到TX BUF 32个字节
CE_H(); //启动发送 ?
// while(GPIOC->IDR&1<<5); //等待发送完成
Delay(0xEFFFF);
sta=NRF24L01_Read_Reg(STATUS); //读取状态寄存器的值 ?
NRF24L01_Write_Reg(WRITE_REG+STATUS,sta); //清除TX_DS或MAX_RT中断标志
if(sta&MAX_TX)//达到最大重发次数
{
NRF24L01_Write_Reg(FLUSH_TX,0xff);//清除TX FIFO寄存器
return MAX_TX;
}
if(sta&TX_OK)//发送完成
{
return TX_OK;
}
return 0xff;//其他原因发送失败
}
// GPIO and SPI initialization
void nRF24_init() {
#if _SPI_PORT == 1
// SPI1
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 | RCC_APB2Periph_GPIOA,ENABLE);
#elif _SPI_PORT == 2
// SPI2
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);
#elif _SPI_PORT == 3
// SPI3
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3,ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); // Disable JTAG for use PB3
#endif
GPIO_InitTypeDef PORT;
// Configure SPI pins
PORT.GPIO_Speed = GPIO_Speed_50MHz;
PORT.GPIO_Pin = SPI_SCK_PIN | SPI_MISO_PIN | SPI_MOSI_PIN;
PORT.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(SPI_GPIO_PORT,&PORT);
// Configure CS pin as output with Push-Pull
PORT.GPIO_Pin = SPI_CS_PIN;
PORT.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(SPI_GPIO_PORT,&PORT);
// Configure CE pin as output with Push-Pull
PORT.GPIO_Pin = nRF24_CE_PIN;
PORT.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(nRF24_CE_PORT,&PORT);
// Configure IRQ pin as input with Pull-Up
PORT.GPIO_Pin = nRF24_IRQ_PIN;
PORT.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(nRF24_IRQ_PORT,&PORT);
nRF24_SPI_Init(SPI_BaudRatePrescaler_2); // Which SPI speed do we need?
SPI_Cmd(SPI_PORT,ENABLE);
CSN_H();
CE_L();
}
void vNrfHwInit(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = NRF_CE_PIN | NRF_CS_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// configure interrupt pin
GPIO_InitStructure.GPIO_Pin = NRF_INT_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; // pull-up, default is 1
GPIO_Init(NRF_GPIO, &GPIO_InitStructure);
vSpiInit();
SPI1_H();
CE_L();
// add int exti handler
vExtiAddCb(GPIO_PortSourceGPIOB, GPIO_PinSource0, vNrfCbState);
}
// GPIO and SPI initialization
void nRF24_init() {
// GND --> PB1
// IRQ --> NC(?!)
// CE <-- PB2
// CSN <-- PC4
// SCK <-- PC5
// MOSI <-- PC6
// MISO --> PC7
// SCK,MOSI,CSN,CE pins set as output fiwth push-pull at 10MHz
// Set PB1, PB2 as output
// CE, GND
GPIOB->DDR |= 0x06;
GPIOB->CR1 |= 0x06;
GPIOB->CR2 |= 0x06;
GPIOB->ODR &= ~(0x2); // GND
// Set PC4..PC6 as output
// MOSI, SCK, CSN
GPIOC->DDR |= 0x70;
GPIOC->CR1 |= 0x70;
GPIOC->CR2 |= 0x70;
// MISO pin set as input with pull-up
// Set PC7 as input
GPIOC->DDR &= ~0x80;
// Configure PC7 as input with pull-up
GPIOC->CR1 |= 0x80;
// Disable external interrupt for PC7
GPIOC->CR2 &= ~0x80;
// IRQ pin set as input with pull-up
// Set PC1 as input
GPIOB->DDR &= ~0x02;
// Configure PC1 as input with pull-up
GPIOB->CR1 |= 0x02;
// Disable external interrupt for PC1
GPIOB->CR2 &= ~0x02;
// Configure SPI
/*CLK_PCKENR1_bit.PCKEN14 = 1; // Enable SPI peripherial (PCKEN14)*/
// Enable SPI (PCKEN11)
CLK->PCKENR1 |= 0x02;
/*
SPI_CR1_bit.BR = 0; // Baud = f/2 (1MHz at 2MHz CPU)
SPI_CR1_bit.CPHA = 0; // CPHA = 1st edge
SPI_CR1_bit.CPOL = 0; // CPOL = low (SCK low when idle)
SPI_CR1_bit.LSBFIRST = 0; // first bit is MSB
SPI_CR1_bit.MSTR = 1; // Master configuration
SPI_CR1_bit.SPE = 0; // Peripherial enabled
*/
SPI->CR1 = 0x04; // SPI: MSB first, Baud=f/2, Master, CPOL=low, CPHA=1st edge
//SPI_CR1 = 0x24; // SPI: MSB first, Baud=f/32, Master, CPOL=low, CPHA=1st edge
/*
SPI_CR2_bit.BDM = 0; // 2-line unidirectional data mode
SPI_CR2_bit.BD0E = 0; // don't care when BDM set to 0
SPI_CR2_bit.RXOnly = 0; // Full duplex
SPI_CR2_bit.SSI = 1; // Master mode
SPI_CR2_bit.SSM = 1; // Software slave management enabled
*/
SPI->CR2 = 0x03; // SPI: 2-line mode, full duplex, SSM on (master mode)
/*SPI_CR1_bit.SPE = 1; // SPI peripherial enabled*/
SPI->CR1 |= 0x40;
CSN_H();
CE_L(); // CE pin low -> power down mode at startup
}
void NRF24L01_Init(void)
{
CE_L(); //使能24L01
CSN_H(); //SPI片选取消
}
void ANO_NRF::TxPacket_AP(uint8_t * tx_buf, uint8_t len)
{
CE_L(); //StandBy I模式
Write_Buf(0xa8, tx_buf, len); // 装载数据
CE_H(); //置高CE
}
void nRF24L01_Enable(void)
{
CE_L(); // chip enable
SPI2_releaseChip(); // Spi disable
//SCK=0; // Spi clock line init high
}