nRF2401驱动程序.doc

nRF2401驱动程序（MSP430）（上）最近在用nRF2401,本来也想偷个懒，上网上下一个程序随便改改了事，但找了好长时间发现几乎都是一个版本，而且并不是那么好用。一个好的驱动程序应该是很好移植的，这就要求在驱动程序中尽量少用全局的变量，把与体系相关的部分放在头文件中，当跨平台移植时，只需改改头文件即可，同时也要把相关的参数配置通过宏定义的形式列出来，用户只需简单的修改宏定义就可以满足自己的要求。本驱动程序希望能达到这个目的，由于水平有限，程序中的不足在所难免，希望大家指正。/* 文件名：nrf2401.h* 功 能：nRF2401驱动程序头文件*/#ifndef NRF2401_H#define NRF2401_H#include /* 接口说明：* CS:P4.6, CE:P5.2, PWR_UP:P5.3, DR1:P4.5, CLK1:P4.4* DATA:P4.3, DR2:P5.1, CLK2:P5.0, DOUT2:P4.7*/#define CS BIT6#define CE BIT2#define PWR_UP BIT3#define DR1 BIT5#define CLK1 BIT4#define DATA BIT3#define DR2 BIT1#define CLK2 BIT0#define DOUT2 BIT7#define CS_H P4OUT |= CS#define CS_L P4OUT &= CS#define CE_H P5OUT |= CE#define CE_L P5OUT &= CE#define PWR_UP_H P5OUT |= PWR_UP#define PWR_UP_L P5OUT &= PWR_UP#define CLK1_H P4OUT |= CLK1#define CLK1_L P4OUT &= CLK1#define DATA_OUT P4DIR |= DATA#define DATA_OUT_H P4OUT |= DATA#define DATA_OUT_L P4OUT &= DATA#define DR1_IN P4DIR &= DR1#define DR1_IN_H P4IN & DR1 / DR1输入是否为高电平#define DATA_IN P4DIR &= DATA#define DATA_IN_H P4IN & DATA / DATA输入是否为高电平#define CLK2_H P5OUT |= CLK2#define CLK2_L P5OUT &= CLK2#define DOUT2_IN P4DIR &= DOUT2#define DOUT2_IN_H P4IN & DOUT2 / DOUT2输入是否为高电平#define DR2_IN P5DIR &= DR2#define DR2_IN_H P5IN & DR2 / DR2输入是否为高电平/* 相应端口设为IO模式*/static inline void IO_MODE() P4SEL &= (DATA + CLK1 + DR1 + CS + DOUT2); P5SEL &= (CLK2 + DR2 + CE + PWR_UP);/* IO端口方向初始化*/ static inline void IO_DIR_INIT() P4DIR |= (DATA + CLK1 + CS); DR1_IN; DOUT2_IN; P5DIR |= (CLK2 + CE + PWR_UP); DR2_IN;/* * IO初始化*/static inline void IO_Init(void) IO_MODE(); IO_DIR_INIT(); #define IO_INIT() IO_Init()/* * nRF2401配置宏，所有的参数都在这里设置 */#define DATA2_W 0 / Length of data payload section RX channel 2 #define DATA1_W 32 / Length of data payload section RX channel 1 / 本驱动程序只支持8的整数倍的数据长度 / DATAx_W(bits) = 256 - ADDR_W - CRC#define ADDR2_0 0x1f / Up to 5 byte address for RX channel 2 #define ADDR2_1 0x3f#define ADDR2_2 0x00#define ADDR2_3 0x00#define ADDR2_4 0x00#define ADDR1_0 0x26 / Up to 5 byte address for RX channel 1#define ADDR1_1 0x26#define ADDR1_2 0x00#define ADDR1_3 0x00#define ADDR1_4 0x00#define ADDR_W 16 / Number of address bits (both RX channels) / 本驱动程序只支持8、16、32、40地址位数 #define CRC_L 0 / 8 or 16 bit CRC Logic 0: 8 bit CRC Logic 1: 16 bit CRC #define CRC_EN 1 / Enable on-chip CRC generation/checking / Logic 0: On-chip CRC generation/checking disabled / Logic 1: On-chip CRC generation/checking enabled#define RX2_EN 0 / Enable two channel receive mode / Logic 0: One channel receive / Logic 1: Two channels receive /receive channel 2 is always 8 channels (8 MHz) above receive channel 1 #define CM 1 / Communication mode (Direct or ShockBurst) / Logic 0: nRF2401A operates in direct mode. / Logic 1: nRF2401A operates in ShockBurst mode#define RFDR_SB 0 / RF data rate (1Mbps requires 16MHz crystal) / Logic 0: 250 kbps Logic 1: 1 Mbps#define XO_F 3 / Crystal frequency 0:4M 1:8M 2:12M 3:16M 4:20M #define RF_PWR 3 / RF output power(dbm) 0:-20 1:-10 2:-5 3:0 #define RF_CH 60 / Frequency channel(7bit,0 - 127) / ChannelRf=2400M + RF_CH * 1M #define RXEN 0 / RX or TX operation / Logic 0: transmit mode Logic 1: receive mode /* Enter Active modes */extern void RF_Active(void);/* Enter Configuration modes */extern void RF_Config(void);/* Enter Stand by modes */extern void RF_Standby(void);/* Power down modes* Note:When the nRF2401A is in power down it must always settle * in stand by mode for 3ms before it can enter configuration or one * of the active modes. */extern void RF_PowerDown(void);/* nRF2401初始化*/extern void RF_Init(void);/* 向指定channel指定地址发送指定数据* channel:接收端的频道（0 - 127）* addr: 接收端的地址的指针* alength:地址长度（byte)* sendbuffer：要发送数据的首指针* dlength:数据长度*/extern void RF_SendData(unsigned char channel, unsigned char *addr, unsigned char alength, unsigned char *sendbuffer, unsigned char dlength);/* 进入接收模式*/extern void RF_RXMode(void);/* 接收数据* receivebuffer:接收缓冲区指针* channel：接收的通道* 返回接收到得字节数,错误返回-1*/extern int RF_ReceiveData(unsigned char *receivebuffer, unsigned char channel);#endifnRF2401驱动程序（MSP430）（下）/* 文件名：nrf2401.c* 功 能：nRF2401驱动程序c文件*/#include nrf2401.h#include static void RF_WriteByte(unsigned char data);static void Delay(unsigned int time);/* 配置数据*/static const unsigned char ConfigData = (unsigned char)DATA2_W, (unsigned char)DATA1_W, (unsigned char)ADDR2_4, (unsigned char)ADDR2_3, (unsigned char)ADDR2_2, (unsigned char)ADDR2_1, (unsigned char)ADDR2_0, (unsigned char)ADDR1_4, (unsigned char)ADDR1_3, (unsigned char)ADDR1_2, (unsigned char)ADDR1_1, (unsigned char)ADDR1_0, (unsigned char)(ADDR_W 2) | (CRC_L 1) | CRC_EN), (unsigned char)(RX2_EN 7) | (CM 6) |(RFDR_SB 5) | (XO_F 2) | RF_PWR), (unsigned char)(RF_CH 0; i /= 2) if(data & i) != 0) DATA_OUT_H; else DATA_OUT_L; CLK1_H; _NOP(); _NOP(); CLK1_L; static void Delay(unsigned int time) while(time-);/* Enter Active modes */void RF_Active(void) PWR_UP_H; CE_H; CS_L;/* Enter Configuration modes*/void RF_Config(void) PWR_UP_H; CE_L; CS_H;/* Enter Stand by modes */void RF_Standby(void) PWR_UP_H; CE_L; CS_L;/* Power down modes* Note:When the nRF2401A is in power down it must always settle * in stand by mode for 3ms before it can enter configuration or one * of the active modes. */void RF_PowerDown(void) PWR_UP_L;/* nRF2401初始化*/void RF_Init(void) unsigned int i; IO_INIT(); RF_Standby(); Delay(30000); RF_Config(); for(i = 0; i 127) return; if(alength 5) return; if(dlength 32) return; if(addr = NULL) | (sendbuffer = NULL) return; RF_Config(); RF_WriteByte(unsigned char)(channel 1); Delay(2000); CS_L; DATA_OUT_L; RF_Active(); for(i = 0; i alength; i+) RF_WriteByte(*addr+); for(i = 0; i dlength; i+) RF_WriteByte(*sendbuffer+); Delay(2000); CE_L; DATA_OUT_L;/* 进入接收模式*/void RF_RXMode(void) RF_Config(); DATA_OUT_H;