nRF24L01 MSP430 发送接收驱动程序

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#include "nrf24l01.h"

unsigned char flag=0;//状态寄存器（STATUS）标志

unsigned char success=0;//发送接收成功与否标志，0为失败，1为发送成功，2为接收成功

unsigned charTXBuf[TX_PLOAD_WIDTH]={0x68,0x86,0x00};

unsigned char RXBuf[RX_PLOAD_WIDTH]={0x00,0x00,0x00};

unsigned char TX_ADDRESS[TX_ADDR_WIDTH]={0x04,0x01,0x02,0x03,0x00}; //接收节点地址(0通道40位可任意配置)

unsigned char RX_ADDRESS[RX_ADDR_WIDTH]={0x04,0x01,0x02,0x03,0x00}; //接收地址（与接收节点地址相同）

//Function:延时t*ms

void Delayms(unsigned int t)

{SysCtlDelay(t*2000);}

//Function:延时t*us

void Delayus(unsigned int t)

{SysCtlDelay(t*2);}

//Function:系统初始化

void SystemInit(void)

{

SysCtlLDOSet(SYSCTL_LDO_2_50V);//设置LDO输出电压为2.5v

SysCtlClockSet(SYSCTL_SYSDIV_1|SYSCTL_USE_OSC|SYSCTL_OSC_MAIN|SYSCTL_XTAL_6MHZ);//系统时钟设置，采用主振荡器，外晶振6MHZ，不分频

}

//Function:管脚配置初始化

void NrfInitPort(void)

{

SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);

GPIOPinTypeGPIOOutput(CE);

GPIOPinTypeGPIOOutput(CSN);

GPIOPinTypeGPIOOutput(MOSI);

GPIOPinTypeGPIOInput(MISO);//MISO配置为输入

GPIOPinTypeGPIOOutput(SCK);

GPIOPinTypeGPIOInput(IRQ);

GPIOIntTypeSet(IRQ,GPIO_LOW_LEVEL);//低电平触发

GPIOPinIntEnable(IRQ);//开启端口引脚中断

IntEnable(INT_GPIOA);//开启GPIOA总中断

}

//Function:SPI写入一字节，同时读出一字节

unsigned char SPIWriteRead(unsigned char c)

{

unsigned char i;

for(i=0;i<8;i++)

{

GPIOPinWrite(MOSI,(0x80&c)>>5);//SPI写

c<<=1;

GPIOPinWrite(SCK,0xFF);

c|=(GPIOPinRead(MISO)>>1);//SPI读

GPIOPinWrite(SCK,0x00);

}

return c;

}

//Function:从寄存器中读取状态字节

unsigned char ReadReg(unsigned char reg)

{

unsigned char regVal;

GPIOPinWrite(CSN,0x00);//片选

SPIWriteRead(R_REGISTER+reg);

regVal=SPIWriteRead(0);//只读，故参数值（）内任意取char型值

GPIOPinWrite(CSN,0xFF);

return regVal;

}

//Function:向寄存器写入一字节，同时返回状态字节

unsigned char WriteReadReg(unsigned char reg,unsigned char value)

{

unsigned char status;

GPIOPinWrite(CSN,0x00);

status=SPIWriteRead(reg);//选择寄存器（写指令）

SPIWriteRead(value);//写入值(配置寄存器)

GPIOPinWrite(CSN,0xFF);

return status;

}

//Function：从寄存器读出num字节的数据(pBuf)，同时返回状态字节

unsigned char ReadBuf(unsigned char reg,unsigned char *pBuf,unsigned char num)

{

unsigned char i,status;

GPIOPinWrite(CSN,0x00);

status=SPIWriteRead(reg);//选择寄存器（写指令）

for(i=0;i

pBuf[i]=SPIWriteRead(0);//读取num字节数据

GPIOPinWrite(CSN,0xFF);

return status;

}

//Function：向寄存器写入num字节的数据(pBuf)，同时返回状态字节

unsigned char WriteBuf(unsigned char reg,unsigned char*pBuf,unsigned char num)

{

unsigned char i,status;

GPIOPinWrite(CSN,0x00);

status=SPIWriteRead(reg);//选择寄存器（写指令）

for(i=0;i

SPIWriteRead(pBuf[i]);//读取num字节数据

GPIOPinWrite(CSN,0xFF);

return status;

}

//Function：接收启动函数

void RXReady(void)

{

WriteReadReg(W_REGISTER+CONFIG,0x0F);//IRQ收发完成中断响应，16位CRC，PWR_UP上电，接收模式

GPIOPinWrite(CE,0xFF);//CE置高使能接收模式

Delayus(130);//待机模式->接收模式用时最长为130us

}

//Function：发送启动函数

void TXReady(unsigned char *txBuf)

{

GPIOPinWrite(CE,0x00);

WriteBuf(W_TX_PAYLOAD,txBuf,TX_PLOAD_WIDTH);//装载发送数据

WriteReadReg(W_REGISTER + CONFIG, 0x0E);//IRQ收发完成中断响应，16位CRC，PWR_UP上电，发送模式

GPIOPinWrite(CE,0xFF);//启动发送

Delayus(10);//CE高电平保持时间至少10us

}