main。c
#include <msp430.h>
#include "NRF24L01.h"
#include "delay.h"
#define _EINT() __bis_SR_register(GIE)
#define _DINT() __bic_SR_register(GIE)
/*************************************************************************
MSP430內部看門狗初始化
*************************************************************************/
void WDT_Init()
{
WDTCTL = WDTPW + WDTHOLD; //關閉看門狗
}
/*************************************************************************
MSP430鎖相環初始化
*************************************************************************/
void CLK_Init()
{
UCSCTL3 = SELREF_2; // Set DCO FLL reference = REFO
UCSCTL4 |= SELA_2; // Set ACLK = REFO
UCSCTL0 = 0x0000; // Set lowest possible DCOx, MODx
// Loop until XT1,XT2 & DCO stabilizes - In this case only DCO has to stabilize
do
{
UCSCTL7 &= ~(XT2OFFG + XT1LFOFFG + DCOFFG);
// Clear XT2,XT1,DCO fault flags
SFRIFG1 &= ~OFIFG; // Clear fault flags
}while (SFRIFG1&OFIFG); // Test oscillator fault flag
__bis_SR_register(SCG0); // Disable the FLL control loop
UCSCTL1 = DCORSEL_5; // Select DCO range 16MHz operation
UCSCTL2 |= 121; // Set DCO Multiplier for 8MHz
// (N + 1) * FLLRef = Fdco
// (249 + 1) * 32768 = 8MHz
__bic_SR_register(SCG0); // Enable the FLL control loop
// Worst-case settling time for the DCO when the DCO range bits have been
// changed is n x 32 x 32 x f_MCLK / f_FLL_reference. See UCS chapter in 5xx
// UG for optimization.
// 32 x 32 x 8 MHz / 32,768 Hz = 250000 = MCLK cycles for DCO to settle
__delay_cycles(250000);
}
void main(void)
{
WDT_Init();
CLK_Init(); //MCLK = SMCLK = 4M
NRF_Init(); //初始化NRF24L01
while(NRF_Check()) //檢查NRF24L01是否在位.
{
LED_L; //LED
}
LED_H;
RX_Mode();
_EINT();
while(1)
{
NRF_RxPacket(rx_buf);
delay_ms(10);
}
}
Nrf2401.c
#include "NRF24L01.h"
uchar TX_Address[5]={0x34,0x34,0x10,0x10,0x01};//設置發送端的地址
uchar RX_Address[5]={0x34,0x34,0x10,0x10,0x01};//設置接收端的地址
uchar tx_buf[TX_PLOAD_WIDTH]={0x00};
uchar rx_buf[RX_PLOAD_WIDTH]={0x00};
/****************************STM32程序***************************************/
//初始化24L01的IO口
void NRF_Init(void)
{
P4SEL=0;
P4DIR |= CSN + MOSI + SCK + CE; //SOMI , IRQ INPUT
P4OUT&=~(CSN + MOSI + SCK + CE);
CSN_H;
//P4IES |= IRQ; //下降沿置標志位
//P4IE |= IRQ;
P1DIR |= BIT0; //LED
P1OUT |= BIT0; //LED
}
void RX_Mode(void)
{
CE_L;
//設置端址
//SPI_Write_Buf(WRITE_REG_NRF + TX_ADDR, TX_Address, TX_ADR_WIDTH);
SPI_Write_Buf(WRITE_REG_NRF + RX_ADDR_P0, TX_Address, TX_ADR_WIDTH);
//初始化配置字
SPI_WR_Reg(WRITE_REG_NRF + EN_AA, 0x01); // Enable Auto.Ack:Pipe0
SPI_WR_Reg(WRITE_REG_NRF + EN_RXADDR, 0x01); // Enable Pipe0
SPI_WR_Reg(WRITE_REG_NRF + SETUP_AW,0x03);
SPI_WR_Reg(WRITE_REG_NRF + SETUP_RETR,0x1a);
SPI_WR_Reg(WRITE_REG_NRF + RF_CH, 40);
SPI_WR_Reg(WRITE_REG_NRF + RX_PW_P0, TX_PLOAD_WIDTH);
SPI_WR_Reg(WRITE_REG_NRF + RF_SETUP, 0x0f);
//PWR_UP、TX_DS、IRQ、EN CRC、rX
SPI_WR_Reg(WRITE_REG_NRF + CONFIG, 0x0f); // Set PWR_UP bit, enable CRC(2 bytes)& Prim:RX. RX_DR enabled..
//清除標志位
uchar sta=SPI_RD_Reg(STATUS); //讀取狀態寄存器的值
SPI_WR_Reg(WRITE_REG_NRF+STATUS,sta); //清除TX_DS,RX_DR或MAX_RT中斷標志
//CE_H; // Set CE pin high to enable RX device
}
void TX_Mode(void)
{
CE_L;
//設置發送端的地址
SPI_Write_Buf(WRITE_REG_NRF+TX_ADDR,TX_Address,TX_ADR_WIDTH);//寫TX節點地址
SPI_Write_Buf(WRITE_REG_NRF+RX_ADDR_P0, RX_Address,RX_ADR_WIDTH); //設置TX節點地址,主要為了使能ACK
//初始化配置字
SPI_WR_Reg(WRITE_REG_NRF + EN_AA, 0x01); // Enable Auto.Ack:Pipe0//
SPI_WR_Reg(WRITE_REG_NRF + EN_RXADDR, 0x01); // Enable Pipe0
SPI_WR_Reg(WRITE_REG_NRF + SETUP_AW,0x03);
SPI_WR_Reg(WRITE_REG_NRF + SETUP_RETR, 0x1a); // 500us + 86us, 10 retrans...
SPI_WR_Reg(WRITE_REG_NRF + RF_CH, 40); // Select RF channel 2.45G
SPI_WR_Reg(WRITE_REG_NRF + RF_SETUP, 0x0f); // TX_PWR:0dBm, Datarate:2Mbps,LNA:HCURR
SPI_WR_Reg(WRITE_REG_NRF + CONFIG, 0x0e); // Set PWR_UP bit, enable CRC(2 bytes)& Prim:TX. MAX_RT & TX_DS enabled..//
//清除TX_DS標志位
uchar sta=SPI_RD_Reg(STATUS); //讀取狀態寄存器的值
SPI_WR_Reg(WRITE_REG_NRF+STATUS,sta); //清除TX_DS或MAX_RT中斷標志
//CE_H;
}
//檢測24L01是否存在
//返回值:0，成功;1，失敗
uchar NRF_Check(void)
{
uchar buf[5]={0XA5,0XA5,0XA5,0XA5,0XA5};
uchar i;
SPI_Write_Buf(WRITE_REG_NRF+TX_ADDR,buf,5);//寫入5個字節的地址.
SPI_Read_Buf(TX_ADDR,buf,5); //讀出寫入的地址
for(i=0;i<5;i++)if(buf[i]!=0XA5)break;
if(i!=5)return 1;//檢測24L01錯誤
return 0; //檢測到24L01
}
uchar NRF_TxPacket(uchar *txbuf)
{
uchar sta;
CE_L;
SPI_Write_Buf(WR_TX_PLOAD,txbuf,TX_PLOAD_WIDTH);//寫數據到TX BUF 32個字節
CE_H;//啟動發送
delay_us(10);
while((P2IN&IRQ)!=0);//等待發送完成
sta=SPI_RD_Reg(STATUS); //讀取狀態寄存器的值
SPI_WR_Reg(WRITE_REG_NRF+STATUS,sta); //清除TX_DS或MAX_RT中斷標志
if(sta&MAX_TX!=0)//達到最大重發次數
{
SPI_WR_Reg(FLUSH_TX,0xff);//清除TX FIFO寄存器
return MAX_TX;
}
if(sta&TX_OK)//發送完成
{
LED_J;
return TX_OK;
}
return 0xff;//其他原因發送失敗
}
uchar NRF_RxPacket(uchar *rxbuf)
{
uchar sta;
CE_H; //CE 高電平>=130us，接收模式
delay_us(130);
sta=SPI_RD_Reg(STATUS); //讀取狀態寄存器的值
SPI_WR_Reg(WRITE_REG_NRF+STATUS,sta); //清除TX_DS或MAX_RT中斷標志
if(sta&RX_OK)
{
CE_L;
LED_J;
SPI_Read_Buf(RD_RX_PLOAD,rx_buf,RX_PLOAD_WIDTH);//讀取數據
SPI_WR_Reg(FLUSH_RX,0xff);//清除RX FIFO寄存器
return 0;
}
else return 1;
}
/***************************spi程序**************************/
uchar SPI_RW(uchar data)
{
uchar bit;
for(bit=0;bit<8;bit++)
{ //先高位，后低位
if(data & BIT7) MOSI_H;
else MOSI_L;
delay_us(2); //數據建立時間 1us
SCK_H;
delay_us(2);
data <<= 1; //一條指令的時間
if(SPI_IN) data |= BIT0; // capture current MISO bit
else data &=~BIT0;
SCK_L;
delay_us(1);
}
delay_us(1);
return(data); // return read data
}
uchar SPI_WR_Reg(uchar reg, uchar value)
{
uchar status;
CSN_L; // CSN low, init SPI transaction
status = SPI_RW(reg); // select register
SPI_RW(value); // ..and write value to it..
CSN_H; // CSN high again
return(status); // return nRF24L01 status byte
}
uchar SPI_RD_Reg(uchar reg)
{
uchar reg_val;
CSN_L; // CSN low, initialize SPI communication
SPI_RW(reg); // Select register to read from..
reg_val = SPI_RW(0); // ..then read registervalue
CSN_H; // CSN high, terminate SPI communication
return(reg_val); // return register value
}
/*接收緩沖區訪問函數：主要用來在接收時讀取FIFO 緩沖區中的值。
基本思路就是通過READ_REG 命令把數據從接收FIFO（RD_RX_PLOAD）中讀出并存到數組里面去。*/
uchar SPI_Read_Buf(uchar reg, uchar *pBuf, uchar bytes)
{
uchar status,byte_ctr;
CSN_L; // Set CSN low, init SPI tranaction
status = SPI_RW(reg); // Select register to write to and read status byte
for(byte_ctr=0;byte_ctr<bytes;byte_ctr++)
pBuf[byte_ctr] = SPI_RW(0); // Perform SPI_RW to read byte from nRF24L01
CSN_H; // Set CSN high again
return(status); // return nRF24L01 status byte
}
/*發射緩沖區訪問函數：主要用來把數組里的數放到發射FIFO 緩沖區中。
基本思路就是通過WRITE_REG 命令把數據存到發射FIFO（WR_TX_PLOAD）中去。*/
uchar SPI_Write_Buf(uchar reg, uchar *pBuf, uchar bytes)
{
uchar status,byte_ctr;
CSN_L; // Set CSN low, init SPI tranaction
status = SPI_RW(reg); // Select register to write to and read status byte
delay_us(1);
for(byte_ctr=0; byte_ctr<bytes; byte_ctr++) // then write all byte in buffer(*pBuf)
SPI_RW(*pBuf++);
CSN_H; // Set CSN high again
return(status); // return nRF24L01 status byte
}
/***************************中斷程序**************************/
#pragma vector=PORT2_VECTOR
__interrupt void p2(void)
{
LED_J; //LED
P2IFG =0;
}
NRF2401。h
#ifndef NRF24L01_H
#define NRF24L01_H
#include "msp430f5529.h"
#include "delay.h"
#define uchar unsigned char
#define uint unsigned int
//POW_UP通過配置子寫入
#define CSN BIT2 //每次SPI前一個下降沿，SPI后上升沿
#define MOSI BIT0
#define MISO BIT1
#define SCK BIT2
#define CE BIT4
#define IRQ BIT5
#define CSN_H P2OUT |= CSN
#define CSN_L P2OUT &=~CSN
#define CE_H P3OUT |= CE
#define CE_L P3OUT &=~CE
#define SCK_H P3OUT |= SCK
#define SCK_L P3OUT &=~SCK
#define MOSI_H P3OUT |= MOSI
#define MOSI_L P3OUT &=~MOSI
#define SPI_IN P3IN&MISO
//SPI(NRF24L01)寄存器地址
#define CONFIG 0x00 //配置寄存器地址;bit0:1接收模式,0發射模式;bit1:電選擇;bit2:CRC模式;bit3:CRC使能;
//bit4:中斷MAX_RT(達到最大重發次數中斷)使能;bit5:中斷TX_DS使能;bit6:中斷RX_DR使能
#define EN_AA 0x01 //使能自動應答功能 bit0~5,對應通道0~5
#define EN_RXADDR 0x02 //接收地址允許,bit0~5,對應通道0~5
#define SETUP_AW 0x03 //設置地址寬度(所有數據通道):bit1,0:00,3字節;01,4字節;02,5字節;
#define SETUP_RETR 0x04 //建立自動重發;bit3:0,自動重發計數器;bit7:4,自動重發延時 250*x+86us
#define RF_CH 0x05 //RF通道,bit6:0,工作通道頻率;
#define RF_SETUP 0x06 //RF寄存器;bit3:傳輸速率(0:1Mbps,1:2Mbps);bit2:1,發射功率;bit0:低噪聲放大器增益
#define STATUS 0x07 //狀態寄存器;bit0:TX FIFO滿標志;bit3:1,接收數據通道號(最大:6);bit4,達到最多次重發
//bit5:數據發送完成中斷;bit6:接收數據中斷;
#define OBSERVE_TX 0x08 //發送檢測寄存器,bit7:4,數據包丟失計數器;bit3:0,重發計數器
#define CD 0x09 //載波檢測寄存器,bit0,載波檢測;
#define RX_ADDR_P0 0x0A //數據通道0接收地址,最大長度5個字節,低字節在前
#define RX_ADDR_P1 0x0B //數據通道1接收地址,最大長度5個字節,低字節在前
#define RX_ADDR_P2 0x0C //數據通道2接收地址,最低字節可設置,高字節,必須同RX_ADDR_P1[39:8]相等;
#define RX_ADDR_P3 0x0D //數據通道3接收地址,最低字節可設置,高字節,必須同RX_ADDR_P1[39:8]相等;
#define RX_ADDR_P4 0x0E //數據通道4接收地址,最低字節可設置,高字節,必須同RX_ADDR_P1[39:8]相等;
#define RX_ADDR_P5 0x0F //數據通道5接收地址,最低字節可設置,高字節,必須同RX_ADDR_P1[39:8]相等;
#define TX_ADDR 0x10 //發送地址(低字節在前),ShockBurstTM模式下,RX_ADDR_P0與此地址相等
#define RX_PW_P0 0x11 //接收數據通道0有效數據寬度(1~32字節),設置為0則非法
#define RX_PW_P1 0x12 //接收數據通道1有效數據寬度(1~32字節),設置為0則非法
#define RX_PW_P2 0x13 //接收數據通道2有效數據寬度(1~32字節),設置為0則非法
#define RX_PW_P3 0x14 //接收數據通道3有效數據寬度(1~32字節),設置為0則非法
#define RX_PW_P4 0x15 //接收數據通道4有效數據寬度(1~32字節),設置為0則非法
#define RX_PW_P5 0x16 //接收數據通道5有效數據寬度(1~32字節),設置為0則非法
#define NRF_FIFO_STATUS 0x17 //FIFO狀態寄存器;bit0,RX FIFO寄存器空標志;bit1,RX FIFO滿標志;bit2,3,保留
//bit4,TX FIFO空標志;bit5,TX FIFO滿標志;bit6,1,循環發送上一數據包.0,不循環;
//24L01發送接收數據寬度定義
#define TX_ADR_WIDTH 5 //5字節的地址寬度
#define RX_ADR_WIDTH 5 //5字節的地址寬度
#define TX_PLOAD_WIDTH 32 //32字節的用戶數據寬度
#define RX_PLOAD_WIDTH 32 //32字節的用戶數據寬度
//////////////////////////////////////////////////////////////////////////////////////////////////////////
//NRF24L01寄存器操作命令
#define READ_REG_NRF 0x00 //讀配置寄存器,低5位為寄存器地址
#define WRITE_REG_NRF 0x20 //寫配置寄存器,低5位為寄存器地址
#define RD_RX_PLOAD 0x61 //讀RX有效數據,1~32字節
#define WR_TX_PLOAD 0xA0 //寫TX有效數據,1~32字節
#define FLUSH_TX 0xE1 //清除TX FIFO寄存器.發射模式下用
#define FLUSH_RX 0xE2 //清除RX FIFO寄存器.接收模式下用
#define REUSE_TX_PL 0xE3 //重新使用上一包數據,CE為高,數據包被不斷發送.
#define NOP 0xFF //空操作,可以用來讀狀態寄存器
#define MAX_TX 0x10 //達到最大發送次數中斷
#define TX_OK 0x20 //TX發送完成中斷
#define RX_OK 0x40 //接收到數據中斷
extern uchar tx_buf[TX_PLOAD_WIDTH];
extern uchar rx_buf[RX_PLOAD_WIDTH];
void TX_Mode(void);
void RX_Mode(void);
uchar SPI_RW(uchar data);
uchar SPI_WR_Reg(uchar reg, uchar value);
uchar SPI_RD_Reg(uchar reg);
uchar SPI_Read_Buf(uchar reg, uchar *pBuf, uchar bytes);
uchar SPI_Write_Buf(uchar reg, uchar *pBuf, uchar bytes);
void NRF_Init(void);
uchar NRF_Check(void);
uchar NRF_TxPacket(uchar *txbuf);
uchar NRF_RxPacket(uchar *rxbuf);
/****************LED指示燈*********************/
#define LED_J P1OUT ^= BIT0
#define LED_H P1OUT |= BIT0
#define LED_L P1OUT &=~BIT0
#endif
|
QQ好友和群
QQ空間
騰訊微博
騰訊朋友
收藏
淘帖
頂
踩
