该实验基于basicRF修改，在学习该实验之前请先掌握basicRF的代码。

节点分别为Transmit节点和Calculater节点。Transmit节点通过串口接收PC机发送的数据并将该字符串发送到Calculater节点，Calculater节点接收到数据后将数据翻转后发送给Transmit节点，Transmit将Calculater返回的数据通过串口传送到PC机。

程序流程图：

源代码：
#include
#include
#include
#include
#include
#include
#include
#include "hal_mcu.h"
#include "hal_button.h"
#include "hal_rf.h"
#include "util_lcd.h"
#include "basic_rf.h"
#include "USART.h"

#define RF_CHANNEL 25 // 2.4 GHz RF channel

// BasicRF address definitions
#define PAN_ID 0x2007 //网络ID
#define TRANSMIT_ADDR 0x2520 //发送器地址
#define CALCULATER_ADDR 0xBEEF //运算器地址
#define APP_PAYLOAD_LENGTH 30 //数据长度

// Application states
#define IDLE 0
#define SEND_CMD 1

// Application role
#define NONE 0
#define TRANSMIT 1
#define CALCULATER 2
#define APP_MODES 2


static uint8 pTxData[APP_PAYLOAD_LENGTH];
static uint8 pRxData[APP_PAYLOAD_LENGTH];
static basicRfCfg_t basicRfConfig;

// Mode menu
static menuItem_t pMenuItems[] =
{
"Transmit", TRANSMIT,
"Calculater", CALCULATER
};

static menu_t pMenu =
{
pMenuItems,
N_ITEMS(pMenuItems)
};

static void appTransmit();
static void appCalculater();
static uint8 appSelectMode(void);
uint8 temp;
int datanum;
int readyToSend;

/*
Calculater节点程序
*/
static void appCalculater()
{
halLcdWriteLine(HAL_LCD_LINE_1, "Calculater");
halLcdWriteLine(HAL_LCD_LINE_2, "Ready");
// Initialize BasicRF
basicRfConfig.myAddr = CALCULATER_ADDR;
if(basicRfInit(&basicRfConfig)==FAILED) {
HAL_ASSERT(FALSE);
}
basicRfReceiveOn();
// Main loop
while (TRUE) {
while(!basicRfPacketIsReady());
if(basicRfReceive(pRxData, APP_PAYLOAD_LENGTH, NULL)0) {
halLedToggle(1);
int current=0,end;
for(int i=APP_PAYLOAD_LENGTH;i=0;i--){ //找出数据末尾
if(pRxData[i] == ' '&&pRxData[i-1] == ' ')
{end=i;
}
}
for(int m=end-2;m=0;m--){ //执行数据调转
pTxData[current++]=pRxData[m];
}
current=0;
halLcdClear();
halLcdWriteLine(HAL_LCD_LINE_1,"From Ttransmiter：");
halLcdWriteLine(HAL_LCD_LINE_2,(const char XDATA*)&pRxData);
halLcdWriteLine(HAL_LCD_LINE_3,"To Ttransmiter");
halLcdWriteLine(HAL_LCD_LINE_4,(const char XDATA*)&pTxData);
basicRfSendPacket(TRANSMIT_ADDR,pTxData, APP_PAYLOAD_LENGTH); //发送数据
for(int i=0;i pTxData[i]=' ';
pRxData[i]=' ';
}
}
}
}

/*
Transmit节点程序
*/
static void appTransmit()
{
halLcdWriteLine(HAL_LCD_LINE_1, "Transmit");
halLcdWriteLine(HAL_LCD_LINE_2, "Joystick Push");
halLcdWriteLine(HAL_LCD_LINE_3, "Send Command");
// Initialize BasicRF
basicRfConfig.myAddr = TRANSMIT_ADDR;
if(basicRfInit(&basicRfConfig)==FAILED) {
HAL_ASSERT(FALSE);
}
basicRfReceiveOn();
while(1) {
while(readyToSend){
halLedToggle(1); //LED闪烁
basicRfSendPacket(CALCULATER_ADDR,pTxData, APP_PAYLOAD_LENGTH);
datanum=0;
for(int i=0;i pTxData[i]=' ';
readyToSend=0;
while(!basicRfPacketIsReady());
basicRfReceive(pRxData, APP_PAYLOAD_LENGTH, NULL);
halLedToggle(1);
pRxData[APP_PAYLOAD_LENGTH-1]='\n';
UartTX_Send_String("From EndDevice:\r\n",sizeof("From EndDevice:\r"),1);
UartTX_Send_String(pRxData,APP_PAYLOAD_LENGTH,1);
}
}
}


void main(void)
{
initUART0(); //串口初始化
uint8 appMode = NONE;
basicRfConfig.panId = PAN_ID;
basicRfConfig.channel = RF_CHANNEL;
basicRfConfig.ackRequest = TRUE;
halBoardInit();
halJoystickInit();
if(halRfInit()==FAILED) {
HAL_ASSERT(FALSE);
}
halLedSet(1);
utilPrintLogo("Welcome!");
while (halButtonPushed()!=HAL_BUTTON_1);
halMcuWaitMs(350);
halLcdClear();
appMode = appSelectMode();
halLcdClear();
if(appMode == TRANSMIT) {
appTransmit();
}
else if(appMode == CALCULATER) {
appCalculater();
}
HAL_ASSERT(FALSE);
}


static uint8 appSelectMode(void)
{
halLcdWriteLine(1, "Device Mode: ");
return utilMenuSelect(&pMenu);
}

#pragma vector = URX0_VECTOR //中断服务子程序，处理接收到字符产生的中断
__interrupt void UART0_ISR(void)
{
URX0IF = 0;//清中断标志
RLED = 1;//发送状态指示
if(U0DBUF!='//m.amcfsurvey.com/yifeichongtian.spaces/articles/article/item/#')
pTxData[datanum++]=U0DBUF;
else
readyToSend=1;
}

实验结果：

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