本文博客链接:,作者:jdh,转载请注明.

硬件图如下:

 

 

 

硬件说明:

1.单片机ATMEGA48

2.无线模块NRF24L01

3.每个板子有2个LED,2个船形开关

 

功能:

主机(左边的)按下A KEY发送信息,从机(右边的)收到信息后返回对应信息,主机收到从机信息后处理信息

 

视频地址:

 

 

代码说明:

状态机结构

主机:

主函数:

 /*

功能：课堂系统主机主函数作者：jdh时间：10-8-9建*/#include <iom48v.h>#include <macros.h>#include "config.h"#include "led_drive.h"#include "nrf24l01.h"#include "public_module.h"#include "api.h"#include "cmd.h"#include "key.h"#include "state.h"

//全局变量初始化

U8 read_nrf[4] = {0};

//状态机程序执行信号灯,0为未执行,1为执行

U8 flag_INIT_STATE = 0; //初始化设备状态程序执行信号灯U8 flag_RX_STATE = 0; //接收模式状态程序执行信号灯U8 flag_DEAL_MESSAGE = 0; //处理信息状态程序执行信号灯U8 flag_TX_STATE = 0; //发送模式1状态程序执行信号灯

U8 sta = 0;

enum sss STATE = INIT_STATE;

//主函数

void main(){

//INIT_STATE_FUNC();

//RX_STATE_FUNC();//TX_STATE_FUNC();//while (1);//状态机while (1){ switch (STATE){ case INIT_STATE: //初始化设备状态{ if (!flag_INIT_STATE){ INIT_STATE_FUNC();}//检测是否有激发状态改变的事件if (check_state_change()){ perform_state_change();}break;}case RX_STATE: //接收模式状态{ if (!flag_RX_STATE){ RX_STATE_FUNC();}//检测是否有激发状态改变的事件if (check_state_change()){ perform_state_change();}break;}case DEAL_MESSAGE_STATE: //处理信息状态{ if (!flag_DEAL_MESSAGE){ DEAL_MESSAGE_FUNC();}//检测是否有激发状态改变的事件if (check_state_change()){ perform_state_change();}break;}case TX_STATE: //发送模式1状态{ if (!flag_TX_STATE){ TX_STATE_FUNC();}//检测是否有激发状态改变的事件if (check_state_change()){ perform_state_change();}break;}}}}//NRF中断#pragma interrupt_handler int0_isr:iv_INT0void int0_isr(void){ /*sta = SPI_Read(STATUS); // read register STATUS's valueLED1_ON();delay(2,2);if(RX_DR) // if receive data ready (RX_DR) interrupt{ SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH);// read receive payload from RX_FIFO buffers5();delay(2,2);LED_ALL_ON();delay(2,1);LED_ALL_OFF();}if(MAX_RT){ SPI_RW_Reg(FLUSH_TX,0);//LED_ALL_OFF();

}

if(TX_DS){ //P2=0x0f;//LED_ALL_ON();}SPI_RW_Reg(WRITE_REG+STATUS,sta);// clear RX_DR or TX_DS or MAX_RT interrupt flag*/}

 

 

状态文件:

/*

功能:状态图文件作者:jdh时间:10-8-18*/#include "state.h"

//说明

//状态图见相关文件

//系统初始化

void INIT_SYSTEM(){  CLI(); //disable all interrupts  //IO口初始化 PORTB = 0x00;  DDRB  = 0x00;  PORTC = 0x00;   DDRC  = 0x00;  PORTD = 0x00;  DDRD  = 0x00;

  MCUCR = 0x00;

  EICRA = 0x02; //extended ext ints  EIMSK = 0x01;   TIMSK0 = 0x00; //timer 0 interrupt sources  TIMSK1 = 0x00; //timer 1 interrupt sources  TIMSK2 = 0x00; //timer 2 interrupt sources   PCMSK0 = 0x00; //pin change mask 0   PCMSK1 = 0x00; //pin change mask 1   PCMSK2 = 0x00; //pin change mask 2  PCICR = 0x00; //pin change enable   PRR = 0x00; //power controller  SEI(); //re-enable interrupts  //all peripherals are now initialized  INIT_LED(); init_key(); init_nrf24l01(); }

//状态程序信号灯清0

void signal_led_all_off(){  flag_INIT_STATE = 0; //初始化设备状态程序执行信号灯 flag_RX_STATE = 0; //接收模式状态程序执行信号灯 flag_DEAL_MESSAGE = 0; //处理信息状态程序执行信号灯 flag_TX_STATE = 0; //发送模式1状态程序执行信号灯}

//检测是否有激发状态改变的事件,如有返回1

U8 check_state_change(){  sta = SPI_Read(STATUS);  switch (STATE) {  case INIT_STATE: //初始化设备状态  {    //按下KEY1   if (detect_key1())   {     return 1;   }  } case RX_STATE: //接收模式状态  {    //接收完信息   if (RX_DR)   {     return 1;   }       break;  } case DEAL_MESSAGE_STATE: //处理信息状态  {    //按下KEY1   if (detect_key1())   {     return 1;   }       break;  } case TX_STATE: //发送模式1状态  {     //LED_ALL_OFF(); //delay(2,2); //LED_ALL_ON(); //delay(2,2); //LED_ALL_OFF(); //delay(1,1);    //达到重发送信息最大值或发送完信息   if (MAX_RT || TX_DS)   {     return 1;   }       break;  } }  return 0;}

//状态切换函数

void perform_state_change(){  sta = SPI_Read(STATUS);  switch (STATE) {  case INIT_STATE: //初始化设备状态  {    //按下KEY1   if (detect_key1())   {     STATE = TX_STATE;   }      break;  } case RX_STATE: //接收模式状态  {    //接收完信息   if (RX_DR)   {     STATE = DEAL_MESSAGE_STATE;   }       break;  } case DEAL_MESSAGE_STATE: //处理信息状态  {    //按下KEY1   if (detect_key1())   {     STATE = TX_STATE;   }       break;  } case TX_STATE: //发送模式1状态  {    //达到重发送信息最大值或发送完信息   if (MAX_RT || TX_DS)   {     STATE = RX_STATE;   }       //清缓存   SPI_RW_Reg(FLUSH_TX,0);       break;  } }  //清中断标志 SPI_RW_Reg(WRITE_REG+STATUS,sta);}

//状态函数

//初始化设备状态函数void INIT_STATE_FUNC(){  //信号灯处理 signal_led_all_off(); flag_INIT_STATE = 1;  //初始化设备 INIT_SYSTEM();  //控制信号 LED_ALL_OFF(); //LED_ALL_ON();}

//接收模式状态函数

void RX_STATE_FUNC(){  //信号灯处理 signal_led_all_off(); flag_RX_STATE = 1;   //配置成接收模式 SPI_RW_Reg(WRITE_REG + CONFIG, 0x00); RX_Mode();  //控制信号 //LED_ALL_OFF(); //LED1_ON();}

//处理信息模式状态函数

void DEAL_MESSAGE_FUNC(){  U8 temp[4] = {1,2,3,4};  //信号灯处理 signal_led_all_off(); flag_DEAL_MESSAGE = 1;  //解码 SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH); cmd_decode(rx_buf,temp);  //处理信息 do {   if (temp[0] == 0x00) //原型机  {    if (temp[1] == 0x01) //从机地址   {     if (temp[2] == 0x02) //回答指令    {      if (temp[3] == 0x00)     {       LED_ALL_OFF();      LED1_ON();     }          if (temp[3] == 0x01)     {       LED_ALL_OFF();      LED2_ON();     }          break;    }    }  } }while (0);  //控制信号 //LED_ALL_OFF();}

//发送模式状态函数

void TX_STATE_FUNC(){  //信号灯处理 signal_led_all_off(); flag_TX_STATE = 1;  //配置成发送模式 SPI_RW_Reg(WRITE_REG + CONFIG, 0x00); cmd_encode(tx_buf,0x00,0x00,0x01,0x00); TX_Mode(); delay(0,1); CE_0;  //控制信号 //LED_ALL_OFF(); //LED2_ON();}

 

 

从机:

主函数:

/*

功能：课堂系统从机主函数作者：jdh时间：10-8-9建*/#include <iom48v.h>#include <macros.h>#include "config.h"#include "led_drive.h"#include "nrf24l01.h"#include "public_module.h"#include "api.h"#include "cmd.h"#include "key.h"

//全局变量初始化

U8 read_nrf[4] = {0};

//状态机程序执行信号灯,0为未执行,1为执行

U8 flag_RX_STATE = 0; //接收模式状态程序执行信号灯U8 flag_DEAL_MESSAGE = 0; //处理信息状态程序执行信号灯U8 flag_TX1_STATE = 0; //发送模式1状态程序执行信号灯U8 flag_TX2_STATE = 0; //发送模式2状态程序执行信号灯

U8 valid_message = 0;

U8 sta = 0;

enum sss STATE = RX_STATE;U8 flag_rx = 0;//已经接收到指令U8 flag_mode = 0;//发送为0,接收为1

//主函数

void main(){ //初始化系统INIT_SYSTEM();//状态机while (1){ switch (STATE){ case RX_STATE: //接收模式状态{ if (!flag_RX_STATE){ RX_STATE_FUNC();}//检测是否有激发状态改变的事件if (check_state_change()){ perform_state_change();}break;}case DEAL_MESSAGE_STATE: //处理信息状态{ if (!flag_DEAL_MESSAGE){ DEAL_MESSAGE_FUNC();}//检测是否有激发状态改变的事件if (check_state_change()){ perform_state_change();}break;}case TX1_STATE: //发送模式1状态{ if (!flag_TX1_STATE){ TX1_STATE_FUNC();}//检测是否有激发状态改变的事件if (check_state_change()){ perform_state_change();}break;}case TX2_STATE: //发送模式2状态{ if (!flag_TX2_STATE){ TX2_STATE_FUNC();}//检测是否有激发状态改变的事件if (check_state_change()){ perform_state_change();}break;}}}/*INIT_SYSTEM();LED_ALL_OFF();SPI_RW_Reg(WRITE_REG + CONFIG, 0x00);RX_Mode();SPI_RW_Reg(WRITE_REG + CONFIG, 0x00);cmd_encode(tx_buf,0x00,0x00,0x01,0x00);TX_Mode();delay(1,100);SPI_RW_Reg(WRITE_REG + CONFIG, 0x00);RX_Mode();//nRF24L01_Config();while (1){ //nRF24L01_RxPacket(rx_buf);}*/}

//NRF中断

#pragma interrupt_handler int0_isr:iv_INT0void int0_isr(void){ /*LED_ALL_OFF();delay(2,2);LED_ALL_ON();delay(2,2);LED_ALL_ON();*//*LED_ALL_OFF();delay(2,1);LED_ALL_ON();delay(2,1);LED_ALL_OFF();delay(2,1);*///sta = SPI_Read(STATUS);/*U8 i = 0;U8 temp[4] = {0};sta=SPI_Read(STATUS); // read register STATUS's value//P2=0x03;if(RX_DR) // if receive data ready (RX_DR) interrupt{ SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH);// read receive payload from RX_FIFO buffers3();}if(MAX_RT){ SPI_RW_Reg(FLUSH_TX,0);//P2=0xaa;//LED2_ON();LED_ALL_ON();delay(2,2);LED_ALL_OFF();delay(2,2);LED_ALL_ON();delay(2,2);LED_ALL_OFF();

}

if(TX_DS){ //P2=0x0f;LED_ALL_ON();delay(2,2);LED_ALL_OFF();delay(2,2);}//SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH);// read receive payload from RX_FIFO bufferSPI_RW_Reg(WRITE_REG+STATUS,sta);// clear RX_DR or TX_DS or MAX_RT interrupt flag*//*if (rx_buf[1] == 0x11){ LED_ALL_ON();}*///SPI_RW_Reg(WRITE_REG+STATUS,sta);//SPI_RW_Reg(FLUSH_TX,0);}

 

 

状态文件:

/*

功能:状态图文件作者:jdh时间:10-8-18*/#include "state.h"

//说明

//状态图见相关文件

//系统初始化

void INIT_SYSTEM(){  CLI(); //disable all interrupts  //IO口初始化 PORTB = 0x00;  DDRB  = 0x00;  PORTC = 0x00;   DDRC  = 0x00;  PORTD = 0x00;  DDRD  = 0x00;

  MCUCR = 0x00;

  EICRA = 0x02; //extended ext ints  EIMSK = 0x01;   TIMSK0 = 0x00; //timer 0 interrupt sources  TIMSK1 = 0x00; //timer 1 interrupt sources  TIMSK2 = 0x00; //timer 2 interrupt sources   PCMSK0 = 0x00; //pin change mask 0   PCMSK1 = 0x00; //pin change mask 1   PCMSK2 = 0x00; //pin change mask 2  PCICR = 0x00; //pin change enable   PRR = 0x00; //power controller  SEI(); //re-enable interrupts  //all peripherals are now initialized  INIT_LED(); init_key(); init_nrf24l01(); }

//状态程序信号灯清0

void signal_led_all_off(){  flag_RX_STATE = 0; //接收模式状态程序执行信号灯 flag_DEAL_MESSAGE = 0; //处理信息状态程序执行信号灯 flag_TX1_STATE = 0; //发送模式1状态程序执行信号灯 flag_TX2_STATE = 0; //发送模式2状态程序执行信号灯}

//检测是否有激发状态改变的事件,如有返回1

U8 check_state_change(){  sta = SPI_Read(STATUS);  switch (STATE) {  case RX_STATE: //接收模式状态  {    //接收完信息   if (RX_DR)   {     return 1;   }       break;  } case DEAL_MESSAGE_STATE: //处理信息状态  {    //信息无效或信号有效且按下KEY1或信号有效且按下KEY2   if ((!valid_message) || (valid_message && detect_key1()) || (valid_message && detect_key2()))   {     return 1;   }       break;  } case TX1_STATE: //发送模式1状态  {    //达到重发送信息最大值或发送完信息   if (MAX_RT || TX_DS)   {     return 1;   }       break;  } case TX2_STATE: //发送模式2状态  {    //达到重发送信息最大值或发送完信息   if (MAX_RT || TX_DS)   {     return 1;   }       break;  } }  return 0;}

//状态切换函数

void perform_state_change(){  sta = SPI_Read(STATUS);  switch (STATE) {  case RX_STATE: //接收模式状态  {    //接收完信息   if (RX_DR)   {     STATE = DEAL_MESSAGE_STATE;   }       break;  } case DEAL_MESSAGE_STATE: //处理信息状态  {    //信号无效   if (!valid_message)   {     STATE = RX_STATE;   }      //信号有效且按下KEY1   if (valid_message && detect_key1())   {     STATE = TX1_STATE;   }      //信号有效且按下KEY2   if (valid_message && detect_key2())   {     STATE = TX2_STATE;   }      break;  } case TX1_STATE: //发送模式1状态  {    //达到重发送信息最大值或发送完信息   if (MAX_RT || TX_DS)   {     STATE = RX_STATE;        //清缓存    SPI_RW_Reg(FLUSH_TX,0);   }      break;  } case TX2_STATE: //发送模式2状态  {    //达到重发送信息最大值或发送完信息   if (MAX_RT || TX_DS)   {     STATE = RX_STATE;        //清缓存    SPI_RW_Reg(FLUSH_TX,0);   }       break;  } }}

//状态函数

//接收模式状态函数void RX_STATE_FUNC(){  //信号灯处理 signal_led_all_off(); flag_RX_STATE = 1;   //配置成接收模式 SPI_RW_Reg(WRITE_REG + CONFIG, 0x00); RX_Mode();  //控制信号 LED_ALL_OFF(); LED_ALL_ON();}

//处理信息模式状态函数

void DEAL_MESSAGE_FUNC(){  U8 temp[4] = {1,2,3,4};  //信号灯处理 signal_led_all_off(); flag_DEAL_MESSAGE = 1;  //解码 SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH); cmd_decode(rx_buf,temp);  //处理信息 do {   if (temp[0] == 0x00) //原型机  {    if (temp[1] == 0x00) //广播地址   {     if (temp[2] == 0x01) //询问指令    {      valid_message = 1; //条件都满足,信息有效     break;    }    }  }  valid_message = 0; //条件不满足,信息无效 }while (0);  //清中断标志 SPI_RW_Reg(WRITE_REG+STATUS,sta);  //控制信号 LED_ALL_OFF();}

//发送模式1状态函数

void TX1_STATE_FUNC(){  //信号灯处理 signal_led_all_off(); flag_TX1_STATE = 1;  //配置成发送模式1 SPI_RW_Reg(WRITE_REG + CONFIG, 0x00); cmd_encode(tx_buf,0x00,0x01,0x02,0x00); TX_Mode(); delay(0,1); CE_0;  //控制信号 LED_ALL_OFF(); LED1_ON();}

//发送模式2状态函数

void TX2_STATE_FUNC(){  //信号灯处理 signal_led_all_off(); flag_TX2_STATE = 1;  //配置成发送模式2 SPI_RW_Reg(WRITE_REG + CONFIG, 0x00); cmd_encode(tx_buf,0x00,0x01,0x02,0x01); TX_Mode(); delay(0,1); CE_0;  //控制信号 LED_ALL_OFF(); LED2_ON();}

 

 

后记:

NRF24L01是半双工通信,如果要双工通信,可以考虑每个板子用2个NRF模块